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Hitachi RCD-2.5FSG1, Service Manual

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Hitachi RCD-2.5FSG1 Service Manual Download Page 300

3-26

MAIN PARTS

3.8

High Pressure Protection Device

If the discharge pressure is excessively high, the compressor and the component parts of the
refrigeration cycle can be damaged.  Therefore, in case that the discharge pressure is higher than
3.3/3.0MPa (R407C/R22), the protection control is activated and the compressor is stopped.

(1) For controlling the high pressure not to

increase excessively during heating
operation, the gas by-pass circuit and the
air volume of the outdoor fan is controlled
automatically.

(2) The gas by-pass circuit, which is composed

of the solenoid valve and the capillary tube
for flow adjustment, control the high
pressure not to increase excessively by
leading the high pressure gas to the low
pressure side.

Low Pressure
Sensor

High Pressure
Sensor

High Pressure
Switch

Union

MP

P

P

S

S

Solenoid
Valve

Gas By-pass Circuit

Capillary Tube

S

S

S

Summary of Contents for RCD-2.5FSG1

Page 1: ... RPC 3 0FSG1 RPC 5 0FSG1 RPC 2 5FSG1 RPC 4 0FSG1 Outdoor Units FSG 1 Series RAS 5FSG RAS 16FSG RAS 24FSG1 RAS 8FSG RAS 20FSG RAS 30FSG1 RAS 10FSG FS3 FS5 Series RAS 5FS3 RAS 16FS3 RAS 24FS5 RAS 8FS3 RAS 20FS3 RAS 30FS5 RAS 10FS3 FXG Series RAS 8FXG RAS 10FXG FX3 Series RAS 8FX3 RAS 10FX3 System Equipment Total Heat Exchangers KPI 2521 KPI 5021 KPI 8021 KPI 10021 This service mamual provides the te...

Page 2: ......

Page 3: ...larm Code 1 24 1 2 3 Troubleshooting in Check Mode by Remote Control Switch 1 79 1 2 4 Troubleshooting by 7 Segment Display 1 85 1 2 5 Function of RSW DSWs and LEDs 1 94 1 3 Procedure of Checking Each Main Parts 1 103 1 3 1 Self Checking of PCBs using Remote Control Switch 1 103 1 3 2 Self Checking of Remote Control Switch 1 105 1 3 3 Self Checking of Indoor Unit PCB Except for RCI RCD RPI 0 8 to ...

Page 4: ...AS 20FSG RAS 5FS3 RAS 8FS3 RAS 10FS3 RAS 16FS3 RAS 20FS3 RAS 8FXG RAS 10FXG RAS 8FX3 and RAS 10FX3 2 29 2 1 14 Removing Reversing Valve RAS 24FSG1 RAS 30FSG1 RAS 24FS5 and RAS 30FS5 2 30 2 1 15 Removing Electrical Components RAS 5FSG RAS 8FSG RAS 10FSG RAS 16FSG RAS 20FSG RAS 5FS3 RAS 8FS3 RAS 10FS3 RAS 16FS3 RAS 20FS3 RAS 8FXG RAS 10FXG RAS 8FX3 and RAS 10FX3 2 31 2 1 16 Removing Electrical Compo...

Page 5: ... Circuit Board PCB 2 70 2 5 6 Removing Float Switch 2 71 2 5 7 Removing Drain Up Mechanism 2 72 2 5 8 Removing Drain Pan 2 73 2 5 9 Removing Thermistors for Liquid and Gas Pipes 2 74 2 5 10 Removing Electronic Expansion Valve Coil 2 75 2 5 11 Removing Automatic Louver Motor 2 77 2 6 Wall Type 2 79 2 6 1 Removing Air Filter 2 79 2 6 2 Removing Front Panel 2 80 2 6 3 Removing Motor for Automatic Lou...

Page 6: ...hecking Procedures for Electronic Expansion Valve Coil 2 110 2 9 10 Removing Printed Circuit Board PCB 2 111 2 10 Total Heat Exchanger 2 112 2 10 1 Structure 2 112 2 10 2 Removing Electrical Parts 2 112 2 10 3 Removing Air Filter and Total Heat Exchanger Element 2 113 2 10 4 Removing Fan Motor 2 114 2 10 5 Air Filter Cleaning 2 115 2 10 6 Total Heat Exchanger Cleaning 2 115 2 11 Cleaning Indoor Un...

Page 7: ...3 2 2 Way Cassette Type 3 15 3 3 3 Ceiling Type 3 16 3 4 Scroll Compressor 3 17 3 4 1 Reliable Mechanism for Low Vibration and Low Sound 3 17 3 4 2 Principle of Compression 3 17 3 4 3 Structure 3 18 3 5 Thermistor 3 20 3 5 1 Thermistor for Indoor Unit 3 20 3 5 2 Thermistor for Outdoor Unit 3 21 3 6 Electronic Expansion Valve 3 23 3 6 1 Electronic Expansion Valve for Outdoor Units 3 23 3 6 2 Electr...

Page 8: ...ge by External Input Except for KPI Series 4 20 4 2 9 Precooling Preheating Operation KPI Series Only 4 21 4 2 10 Picking Up Operation Signal 4 21 4 3 Outdoor Unit 4 25 4 3 1 Demand 4 27 4 3 2 Forced Stoppage 4 27 4 3 3 Demand Current Control Only for 24 and 30HP 4 28 4 3 4 Fixing Operation Mode 4 28 4 3 5 Snow Sensor 4 29 4 3 6 Defrosting Condition Changeover 4 30 4 3 7 Indoor Fan Control during ...

Page 9: ... 5 4 Alarm Code 31 5 4 5 5 Not Cooling Well due to Insufficient Installation Space for Outdoor Unit 5 5 5 6 Attention for SET FREE FXG FX3 Series 5 6 5 7 Select Guide of Drain Pipe for Indoor Unit 5 11 5 8 Caution on Refrigerant Leakage 5 12 5 9 Maintenance Work 5 14 5 10 Service Maintenance Record by 7 Segment Display 5 15 5 11 Service Maintenance Record by Remote Control Switch 5 16 5 12 Service...

Page 10: ... U4UD3950 RPI 2 0FSG1 60277339 60277594 From U4UH8341 RPI 2 5FSG1 60277340 60277595 From U4UH8361 RPI 3 0FSG1 60277341 60277596 From U4UH8381 RPI 4 0FSG1 60277342 60277597 From U4UH8431 RPI 5 0FSG1 60277343 60277598 From U4UH8451 RPI 8FSG1 60277485 From First Production RPI 10FSG1 60277486 From First Production RPK 1 0FSGM 60277412 60277699 1 From U4UR1494 RPK 1 5FSGM 60277413 60277700 1 From U4UR...

Page 11: ...t No 12 Unit No 13 Unit No 14 Unit No 15 Unit Setting Position Set by inserting slotted screwdriver into the groove 01 2 3 4 5 6 7 8 9 A B C E F D 01 2 3 4 5 6 7 8 9 A B C E F D 01 2 3 4 5 6 7 8 9 A B C E F D 01 2 3 4 5 6 7 8 9 A B C E F D 01 2 3 4 5 6 7 8 9 A B C E F D 01 2 3 4 5 6 7 8 9 A B C E F D 01 2 3 4 5 6 7 8 9 A B C E F D 01 2 3 4 5 6 7 8 9 A B C E F D 01 2 3 4 5 6 7 8 9 A B C E F D 01 2 ...

Page 12: ...switches according to the figure below Check to ensure that the 8 pin of DSW5 is correctly set according to the power supply of the unit If the setting is different from the power supply of the unit it may cause the unit stoppage due to alarm or the breakdown of the compressor By using switch DSW4 7 and 8 the unit is started or stopped after 10 to 20 seconds after the switch is operated Make the o...

Page 13: ... Shift Low Noise Cancellation of Outdoor Ambient Temp Limit of Heating Cancellation of Outdoor Ambient Temp Limit of Cooling Power Supply 7 8 1 2 3 4 ON RAS 10FX3 NSR 1 2 ON DSW3 Height Difference The O U is located higher than I U 0 to 50m The O U is located lower than I U 0 to 20m The O U is located lower than I U 20 to 40m B S 1 2 ON SR 1 2 ON DSW3 Height Difference The O U is located higher th...

Page 14: ... of Heating Thermo OFF Night Shift Low Noise Cancellation of Outdoor Ambient Temp Limit of Heating Cancellation of Outdoor Ambient Temp Limit of Cooling 1 2 3 4 ON Set the pin at the ON side at emergency operation B S NSR NSR 1 2 ON DSW8 Trial Service 2 Trial Service 1 B S Exchanged Compressor Operation 1 2 1 2 ON 1 2 ON DSW10 Transmitting B S Cancellation of End Resistance 1 2 ON Short Circuit of...

Page 15: ...ipped with 2 types of dip switches DSW2 DSW5 as shown in the figure below NOTE 1 1 2 Checking of Electrical Wiring Check to ensure that the terminal for power source wiring terminals L1 to L1 and N to N of each terminal board AC380 415V terminals R to R and T to T of each terminal board AC220V and intermediate wiring Operating Line terminals 1 to 1 and 2 to 2 of each terminal board DC5V between th...

Page 16: ... L1 L2 N L1 L2 N No 0 Indoor Unit No 1 Indoor Unit Distribution Box or Pull Box 2 Distribution Box or Pull Box 2 TB Terminal Board PCB Printed Circuit Board Field Wiring Field Supplied Optional Accessory No 0 System Indoor Units Max 27 Units per Refrigerant Cycle RAS 24FSG1 RAS 24FS5 Max 32 Units per Refrigerant Cycle RAS 30FSG1 RAS 30FS5 Remote Control Cable Shielded Twist Pair Cable 1 Remote Con...

Page 17: ...Unit Distribution Box or Pull Box 2 Distribution Box or Pull Box 2 TB Terminal Board PCB Printed Circuit Board Field Wiring Field Supplied Optional Accessory No 0 System Indoor Units Max 27 Units per Refrigerant Cycle RAS 24FSG1 RAS 24FS5 Max 32 Units per Refrigerant Cycle RAS 30FSG1 RAS 30FS5 Remote Control Cable Shielded Twist Pair Cable 1 Remote Control Cable Shielded Twist Pair Cable 1 Remote ...

Page 18: ...18 MLFC 0 75SQ 20 20 RAS 8FSG RAS 8FS3 30 MLFC 2SQ 30 30 RAS 10FSG RAS 10FS3 36 MLFC 3 5SQ 40 40 RAS 16FSG RAS 16FS3 58 MLFC 5 5SQ 60 60 RAS 20FSG RAS 20FS3 72 MLFC 8SQ 75 75 RAS 24FSG1 RAS 24FS5 77 MLFC 8SQ 100 80 RAS 30FSG1 RAS 30FS5 90 MLFC 14SQ 120 100 RAS 5FSG RAS 5FS3 27 MLFC 2SQ 30 30 RAS 8FSG RAS 8FS3 45 MLFC 3 5SQ 50 RAS 10FSG RAS 10FS3 55 MLFC 5 5SQ 60 RAS 16FSG RAS 16FS3 88 MLFC 14SQ 10...

Page 19: ...nits Max 4 Units Power Supply Line No 0 Group CH Unit No 1 Group CH Unit No 1 System CH Units TB1 Outdoor Unit RAS 8FXG RAS 8FX3 RAS 10FXG RAS 10FX3 ELB FUSE Main Switch 3N 380V 50 Hz 415V 50 Hz 415V 60 Hz 1N 3N 220V 50 Hz 240V 50 Hz 220V 50 Hz ELB ELB No 0 System Outdoor Unit TB1 TB2 L1 L2 L3 N 1 2 No 1 System Outdoor Unit TB1 TB2 L1 L2 L3 N 1 2 No 3 System Outdoor Unit TB1 TB2 L1 L2 L3 N 1 2 Ope...

Page 20: ...PCB1 2 Turn on the Outdoor Unit 3 Auto addressing Starts Normal Case 1 The outdoor unit s on board 7 segment LED display is not indicated continues to flash after 30 seconds Abnormal Case 2 The outdoor unit s on board 7 segment LED display indicates as follows if there is something wrong A The indoor units are not supplied with power B Disconnection of the operating line between the outdoor and in...

Page 21: ...erform the emergency operation when the insulation resistance is 0Ω There is a possibility that refrigerant oil may be oxidized if the emergency operation is performed the other compressor is damaged In case of total capacity of Thermo ON indoor units are more than 50 of outdoor unit capacity emergency operation is available In this emergency operation frequency of the compressor is not controlled...

Page 22: ...or when the constant speed compressor is failed This operation is controlled by a normal control b Operating Condition Set the No 2 3 or 4 of DSW7 on the PCB1 at the ON side In case of 5 to 20HP Set the No 1 2 3 or 4 of DSW7 on the PCB1 at the ON side In case of 24 and 30HP Temperature of THM2 THM3 and THM4 on the top of compressors are not ignored by setting DSW7 If the thermistor is short circui...

Page 23: ...or any uncovered part of wires Remove the cause of short circuit and replace the fuse Short Circuit of Control Circuit to Earth Measure insulation resistance Measure insulation resistance Remove the cause of short circuit and replace the fuse Failure of Indoor Unit Fan Motor Measure resistance between wiring and insulation resistance Failure of AC Chopper for Indoor Fan Measure voltage at secondar...

Page 24: ...ote Control Switch Check it by self checking mode 1 Check it by self checking mode 2 Replace remote control switch if failed Check connectors Correctly connect wires Replace PCB if failed Take action according to the procedure indicated in TEST RUN Incorrect Wiring Connection Unconnected Wires to PCB Failure of PCB Failure of PCB 1 1 5 Failure of Power Supply to Indoor Unit and Remote Control Swit...

Page 25: ...ailed Check it by self checking 1 Check it by Check Mode 2 Failure of PCB Replace or correctly connect wires if abnormality exists Failure of Air Inlet Thermistor Failure of Thermistor Disconnection of Thermistor Measure voltage between contacting parts Replace PCB for outdoor unit Failure of Magnetic Switch for Outdoor Unit Fan Motor Insufficient Contacting Check magnetic switch activates correct...

Page 26: ...Control 01 Room Thermostat Cooling 02 Room Thermostat Heating In case that room thermostat is not used set for input signal actually used If no signal is used set at 00 Cause Check Item Action Turn OFF Main Switch Phenomenon 1 1 7 Abnormalities of Devices 1 Refer to Item 1 3 1 to 1 3 4 2 Refer to Item 1 2 3 3 Even if controllers are normal the compressor does not operate under the following condit...

Page 27: ...ace if failed Replace if PCB is failed Disconnected Wire of Thermistor Measure resistance of coil Failure of 4 Way Valve Disconnected 4 Way Valve Coil Enforced power supply Replace 4 Way valve Incorrect Activation of 4 Way Valve Check connectors Failure of Outdoor Unit PCB Disconnected Wires to PCB Correctly connect wiring Replace it when check mode is not available Failure of PCB Check PCB by sel...

Page 28: ...w to Indoor Unit Heat Exchanger Check temp difference at inlet and outlet of strainer Replace strainer in indoor unit Clogged Strainer in Indoor Unit or CH Unit Clogging at Low Pressure Piping Check for clogging Remove clogging Check for connection cord and connector Replace connector Check for clogged air filter Clean air filter Check for obstacle at inlet or outlet Remove obstacles Excessively L...

Page 29: ...ure service space Correct Fan Speed Replace fan motor Insufficient Air Flow to Outdoor Unit Heat Exchanger Check for clogging Remove clogging Check for connecting cord and connector Replace connector Is there operation sound from coil Replace coil Is thermistor on compressor normal Replace thermistor Is thermistor installed correctly on compressor Correctly install it Failure or Malfunction of Exp...

Page 30: ...Excessively Low Air Temp through Outdoor Unit Heat Exchanger Measure field supplied piping Use specified pipes Excessively Small Diameter or Long Piping Is outdoor unit heat exchanger clogged Remove clogging Is there any obstacles at inlet or outlet of outdoor unit Remove obstacles Is service space for outdoor unit sufficient Secure sufficient service space Check for speed of outdoor unit fan Repl...

Page 31: ...r unit Remove obstacles Check indoor fan speed Replace fan motor Insufficient Air Flow to Indoor Unit Heat Exchanger Check temp difference between inlet and outlet of 4 way valve Check for leakage of solenoid valve Excessively High Suction Pressure Failure of Bypass Solenoid Valve Replace solenoid valve Replace failed expansion valve of indoor unit Replace 4 way valve Malfunction or Internal Leaka...

Page 32: ...Runner is Hitting Casing Check it by viewing Adjust position of propeller fan Outdoor Unit Propeller Fan is Hitting Shroud Check surface of contacts Replace magnetic switch Hamming Sound from Magnetic Conductor Check each fixing screws Tightly fix it Abnormal Vibration of Cabinets Check obstacles Remove obstacles Obstacle at Outdoor Fan Check wiring Connect wiring correctly Disconnected Wiring for...

Page 33: ...me Refrigerant Cycle 35 Incorrect Setting in Indoor Outdoor Unit No Existence of the same Indoor Unit No in the same refrigerant cycle 38 Abnormality of Protective Circuit in Outdoor Unit Failure of Indoor Unit PCB Incorrect Wiring Connection to PCB in Outdoor Unit 39 Abnormality of Running Current at Constant Compressor Overcurrent Melted Fuse of Failure of Current Sensor 43 Pressure Ratio Decrea...

Page 34: ...ing Check connections Repair connection Faulty Connection Check PCB by self checking 1 Replace it if faulty Faulty Indoor Unit PCB 1 2 2 Troubleshooting by Alarm Code RUN light flickers and ALARM is indicated on the remote control switch The unit No alarm code and the unit code is alternately indicated on the set temperature section and the unit No and alarm code are indicated on the display of th...

Page 35: ...30 kgf cm2G for FS3 FS5 and FX3 Series 3 3MPa 33 kgf cm2G for FSG FSG1 and FXG Series No Faulty PCB1 No Voltage Faulty PCB1 Restart after connecting PCN3 or PCN2 correctly 5 to 20HP Restart after connecting PCN3 PCN2 PCN16 PCN17 or PCN18 correctly 24 and 30HP Check Wiring Connection Except for PCB1 No No Voltage No No Looseness No RUN light flickers and ALARM is indicated on the remote control swi...

Page 36: ... Repair connections Incorrect Connection Calculate heat load Reduce heat load or use a bigger unit Check for hot air near the ceiling Heating Make good circulation Check for short circuited air Heating Remove short circuited air Check for other heat source Remove heat source Excessively High Temp Air to Indoor Unit Heat Exchanger Clogging of Heat Exchanger Remove clogging Check for dust on air fil...

Page 37: ...mistor Check attaching state of discharge gas thermistor Replace thermistor Reattach thermistor Faulty or Malfunction of Expansion Valve Check cycle operating temp and expansion valve opening Charge refrigerant correctly Overcharged Refrigerant Check ambient temp and pressure Recharge refrigerant after vacuum pumping Mixture of Non Condensable Gas in Refrigerant Cycle Check for clogging Remove clo...

Page 38: ...ting between indoor units and outdoor unit and also abnormality is maintained for 30 seconds after the micro computer is automatically reset The alarm is indicated when the abnormal transmitting is maintained for 30 seconds from starting of the outdoor unit Investigate the cause of overcurrent and take necessary action when fuses are melted or the breaker for the outdoor unit are activated Regardi...

Page 39: ... and indoor units or fuse EF1 for PCB1 No Does refrigerant system setting between DSW1 on PCB1 and DSW5 on PCB1 correspond Yes No Does Alarm occur with all indoor units Yes No Faulty PCB1 PCB1 Outdoor Unit Printed Circuit Board PCB1 Indoor Unit Printed Circuit Board Outdoor Unit Check other indoor units No No No Is the fuse for PCB1 melted Yes Yes No Is LED3 yellow ON even if CN2 of PCB1 is remove...

Page 40: ...ion resistance Remove short circuit and replace fuse Short Circuit of Control Circuit to Ground Disconnected Wires Insufficient Contacting or Incorrect Connection Check continuity of wires Check for looseness of connection screws Check terminal Nos Replacing wires repairing tightening screws and correct wiring Between Outdoor Unit and Indoor Unit Power Source Wiring for Outdoor Unit Measure resist...

Page 41: ...between indoor units CH units and outdoor unit and also abnormality is maintained for 30 seconds after the micro computer is automatically reset The alarm is indicated when the abnormal transmitting is maintained for 30 seconds from starting of the outdoor unit Investigate the cause of overcurrent and take necessary action when fuses are melted or the breaker for the outdoor unit are activated Reg...

Page 42: ...e fuse No No No No Set it correctly Check CH unit wiring Yes Plug PCN1 and CN1 correctly Check the fuses of outdoor unit power supply No Check wiring between outdoor unit and indoor units or fuse EF3 for PCB 1 No Faulty PCB1 PCB1 Outdoor Unit Printed Circuit Board PCB1 Indoor Unit Printed Circuit Board Outdoor Unit No Is LED3 yellow on PCB 1 flickering more than once in 10 seconds No No Is the fus...

Page 43: ...tion Yes Check other indoor units Set correctly No Faulty PCB1 Is LED3 yellow ON even if CN2 of PCB1 is removed Yes Yes No CH Unit 1 PCB1 Factory Setting for Non Pole Transmitting 2 In case that terminal resistance DSW10 1P is OFF when H Link Connection is performed Set the terminal resistance to ON when CN2 is removed Set the terminal resistance to OFF when CN2 is reconnected 3 PCB1 Factory Setti...

Page 44: ... Comp Motor Measure resistance of coil Replace magnetic switch and fuse Check continuity and looseness of connection screws Replacing Wires Repairing and Tightening Screws Check terminal Nos Correctly Connect Wires Failure of AC Chopper for Outdoor Fan Replace the AC chopper for outdoor fan and fuse Measure insulation resistance Measure input voltage at CN1 on PCB 2 1 Replace transformer Check con...

Page 45: ...20HP This alarm is indicated when abnormality is maintained for 30 seconds after normal transmitting between the outdoor unit PCB1 and ISPM and also abnormality is maintained for 30 seconds after the micro computer is automatically reset The alarm is indicated when the abnormal transmitting is maintained for 30 seconds from starting of the outdoor unit In case of 24 and 30HP PCB1 Control PCB in Ou...

Page 46: ...is normal PCB1 is normal Voltage for unit to be suspended Running Voltage B V Power Supply A B 187 323 342 to 456 380 415V 50Hz 380V 60Hz 220V 60Hz Starting Voltage Less than A V Abnormality with Power Source Is there any excessively voltage decrease at power source Yes Correctly connect each phase of power source Faulty PCB1 or other cause Refer to next page No Reverse Phase Connection Yes NOTE P...

Page 47: ... apparatus Is connection correctly between PCB3 and transistor module Does LED2 on PCB3 ON after compressor s electromagnetic switches CMC turn on Check capacitors CB1 2 Restart operation Check wiring and cable capacity Connect correctly Replace capacitors PCB3 is faulty Replace it Capacitors have high voltage Be careful especially 1 Yes Yes Yes Check the wiring diode module DM and capacitors CB1 ...

Page 48: ...peration by operation of other apparatus Is connection correctly between ISPM and capacitors CB1 and CB2 DCL or CMC Check capacitors CB1 2 Restart operation Check wiring and cable capacity Connect correctly Replace capacitors Faulty ISPM Replace it Capacitors have high voltage Be careful especially 1 Yes Yes Yes Check the wiring ISPM and CB 2 In case the wiring is correct replace ISPM Normal Fault...

Page 49: ...s connected properly Is the connector on indoor unit PCB for ex valve connected properly Are the refrigerant piping and electric wiring matching Is refrigerant correctly charged Is gas leaking Yes Yes Yes Yes Yes Yes Yes Yes Superheat under 15 degrees oC Cooling Check the discharge pressure and compressor discharge gas temperature and calculate superheat value by outdoor unit PCB Heating Operation...

Page 50: ... looseness replace connector or repair connections Incorrect Connection Check connections Replace PCB and check operation Faulty PCB Fault Replace PCB if faulty Repair wiring connections Disconnected Wires for Ex Valve Control Check ref cycle and the electrical system Repair wiring Ref Cycle is Different from the Electrical System Measure pressure Refer to Figure in Test Run of TCII Correctly char...

Page 51: ... Is it at cooling or heating mode when the alarm has occurred Is the opening degree of ex valve of outdoor bypass 100 Is the connector CN12 for ex valve of outdoor bypass connected properly Is the opening of all the operating indoor units ex valve 100 Is the amount of refrigerant correct Is gas leaking Yes Yes Yes Yes Yes Yes Yes Yes Cooling Check the outdoor unit PCB to see if the compressor disc...

Page 52: ...ve looseness replace connectors or repair connections Incorrect Wiring Check connections Replace PCB and check operation Faulty PCB Fault Replace PCB if faulty Repair wiring connections Disconnected Wires for Ex Valve Check ref cycle and the electrical system Repair wiring Ref Cycle is Different from the Electrical System Ref Leakage Replace solenoid valve if faulty Faulty Gas Bypass Solenoid Valv...

Page 53: ...Replace the outdoor fan motor if faulty Or check outdoor temperature If it is unusual take suitable action to reduce it No Common Is 220V or 240V applied across R2 and S2 on PCB2 AC Chopper Is 220V or 240V applied across R2 and N of TB1 Is connection bad at the connector PCN14 on PCB1 or fan motor connectors CN1 CN2 CN50 CN51 CN52 Check Item 5 to 20HP ITO1 2 380 415 380V 220V 50 60Hz 24 30HP ITO1 ...

Page 54: ...scharge Air Temperature 2 Indoor Unit Liquid Refrigerant Temperature 3 Indoor Unit Intake Air Temperature 4 Outdoor Air Temperature 5 Outdoor Unit Evaporating Temperature 6 Indoor Unit Gas Piping Indoor Unit Air Inlet Thermistor In Case of 4 Way Cassette Type 0 10 20 30 40 50 60 70 80 15 10 5 0 5 10 15 20 25 30 35 40 45 50 55 60 82 61 46 35 27 20 5 16 12 5 10 8 5 3 3 6 2 5 90 Ambient Temperature o...

Page 55: ... Alarm Code Abnormality of Thermistor for Indoor Unit Discharge Air Temperature Air Outlet Thermistor Yes Connect it No Refer to page 1 44 for thermistor resistance Faulty PCB Is the thermistor connected to THM2 of PCB Yes Faulty Thermistor No Is resistance of THM2 between 0 24 and 840kΩ Cause Check Item Action Turn OFF Main Switch Phenomenon Faulty Air Outlet Thermistor Check resistance Replace t...

Page 56: ...normality of Thermistor for Indoor Unit Heat Exchanger Liquid Refrigerant Pipe Temperature Freeze Protection Thermistor Yes Connect it No Refer to page 1 44 for thermistor resistance Faulty PCB Is the thermistor connected to THM3 of PCB Yes Faulty Thermistor No Is resistance of THM3 between 0 24 and 840kΩ Cause Check Item Action Turn OFF Main Switch Phenomenon Faulty Freeze Protection Thermistor C...

Page 57: ...removed Alarm Code Abnormality of Thermistor for Indoor Unit Heat Exchanger Gas Refrigerant Pipe Temperature Gas Piping Thermistor Refer to page 1 44 for thermistor resistance Yes Yes Connect it No Faulty Thermistor Faulty PCB No Is it connected to THM5 of PCB Is resistance of THM5 between 0 24kΩ and 840kΩ Cause Check Item Action Turn OFF Main Switch Phenomenon Faulty Thermistor for Indoor Unit He...

Page 58: ... No No Faulty PCB1 Replace PCB1 Is fan motor speed control command to fan motor correctly Faulty PCB1 or Transformer Insufficient voltage for PCB1 Faulty PCB1 or Transformer Faulty Fan Motor Is LED4 on PCB2 OFF Replace PCB1 or Transformer Replace PCB1 or Transformer Replace Fan Motor No Yes Faulty PCB2 Is the voltage between GND of PCB1 and PC1 2 of PCB2 several voltage Remove CN201 on PCB2 Is the...

Page 59: ...tor No Yes Does the indoor fan run Is fan motor hot Is continuity present at the internal thermostat of indoor fan motor Is connection bad at the connector Is the coil resistance of fan motor normal Check indoor temperature If it is unusual take suitable action to reduce it Cause Check Item Action Turn OFF Main Switch Phenomenon Activation of Internal Thermostat for Indoor Unit Fan Motor Measure r...

Page 60: ... No Yes Does the indoor fan run Is the fuse EF1 EF2 cut out In the case of Hi Tap setting is the voltage between 5 31 of CN29 on PCB normal Is connection bad at the connector Is the coil resistance of fan motor normal Check the dislocation of motor shaft and the obstacle of current of air Cause Check Item Action Turn OFF Main Switch Phenomenon Activation of Overcurrent Protection Device for Indoor...

Page 61: ...d 3 of the connector CN7 of the outdoor unit PCB1 Yes Yes Is voltage under 0 1 VDC or over 4 9VDC across 2 and 3 of the connector CN7 of the outdoor unit PCB1 Clogged Check Joint Abnormality of High Pressure Sensor Connect correctly PCB1 defective Yes No No No No Faulty PCB1 Replace check joint Yes Cause Check Item Action Turn OFF Main Switch Phenomenon Faulty High Pressure Sensor Check output vol...

Page 62: ...eration continues based on the assumption that the outdoor temperature is 35 C Cooling 6 C Heating Refer to page 1 44 for thermistor resistance Alarm Code Abnormality of Thermistor for Outdoor Air Temperature Outdoor Unit Ambient Thermistor Yes Yes Connect it No Faulty Thermistor Refer to page 1 44 Faulty PCB1 No Is it connected to THM7 TA of PCB1 Is resistance of THM7 between 0 2kΩ and 500kΩ Caus...

Page 63: ...lty PCB Check setting of DSW2 on PCB1 Correctly set DSW2 on PCB1 Incorrect Setting of DSW2 on PCB1 Yes Yes Set DSW2 on PCB1 correctly No Connect them No Faulty Thermistor No Position of Thermistor 1 Indication on the display of the outdoor unit PCB Faulty PCB1 Is the setting of DSW2 on PCB1 right Are thermistors THM8 THM9 THM12 and THM13 connected to THM8 TD1 THM9 TD2 THM12 TD3 and THM13 TD4 Yes I...

Page 64: ... Outdoor Unit Yes Yes Connect it No Faulty Thermistor Regarding the thermistor characteristics refer to page 1 44 Faulty PCB1 No Is CN105 or CN106 on PCB1 connected to THM10 Te1 or THM11 Te2 or THM15 Te3 Is resistance of the thermistor between 0 2kΩ and 500kΩ 1 Indication on the display of the outdoor unit PCB 1 2 4 Faulty Te1 2 2 4 Faulty Te2 3 2 4 Faulty Te3 Cause Check Item Action Turn OFF Main...

Page 65: ...age is correct Replace pressure sensor if faulty Fault Indicated Pressure Value is Excessively High or Low Check for clogging of check joint Replace check joint Malfunction of Pressure Sensor due to Faulty Check Joint Check connections Repair wiring and connections Incorrect Connection Replace PCB and check operation Replace PCB if faulty Faulty PCB Is the connection CN8 of the outdoor unit PCB1 m...

Page 66: ...hed incorrectly to the FXG FX3 series outdoor unit Alarm Code Incorrect Wiring Connection FX Series Only Is wiring connection correct Yes Is PCB1 for FXG FX3 series Yes Fault PCB for CH Unit Correct the wiring connection and start the unit again Outdoor Unit PCB is correct Outdoor Unit PCB is for FSG FS3 series No Replace the PCB1 with the one for FXG FX3 series and start the unit again No Correct...

Page 67: ...ing on PCB Correctly set dip switch DSW3 Incorrect Capacity Setting of Indoor Unit Check outdoor unit model by calculating total indoor units capacity Ensure that total indoor unit capacity is from50 to 130 Total Indoor Unit Capacity Connected to the Outdoor Unit is Beyond Permissible Range Check refrigeration cycle setting on outdoor unit PCB and indoor unit PCB Set them correctly Refrigeration C...

Page 68: ...ll LED3 ON Is there any indoor unit whose lamp is not lit or whose LCD is not indicated at the remote control switch Check the power source fuse and transformer of the indoor unit or CH unit Yes Faulty indoor unit PCB Cause Check Item Action Turn OFF Main Switch Phenomenon If all indoor unit show alarm code 32 check PCB by self checking mode for all indoor unit or CH unit Replace PCB if faulty Fau...

Page 69: ...icated on the display of the outdoor unit PCB This alarm code is indicated when AC 220V or 240V is supplied to voltage A or B on PCB1 in the outdoor unit during inverter compressor stoppage Alarm Code Abnormality of Picking up Circuit for Protection Outdoor Unit Alarm Code Incorrect Indoor Unit No Setting Faulty PCB1 Check wiring connection of other PCB 1 No No No Yes Yes PCB1 is normal Is 220VAC ...

Page 70: ...detected 0A and retry when 3 minutes are passed after all compressors are stopped and this phenomenon occurs three times within 30 minutes Alarm Code Abnormality of Running Current at Constant Compressor Connect it correctly No No Yes Yes Yes Yes Does the CMC2 4 turn ON Does the constant compressor operate Is the running current indicated on 7 Segment of PCB1 at check mode Is the connector CN4 6 o...

Page 71: ...ely Large Running Current of Compressor Motor Adjust voltage between each phase Excessively High Discharge Pressure Operate within 380 415V 10 50Hz 380V 10 60Hz 220V 10 60Hz Check for causes Overcurrent of Compressor Motor Locked up Replace compressor Seizure of Compressor Bearing Looseness of Screws for Power Source Single Phase Operation Tightly fix screws Deterioration of Contact of Magnetic Sw...

Page 72: ...d power cable Check the inverter Replace the four way valve if faulty No No No No Is there a leak in the Solenoid Valve for Hot Gas Bypass SVA Yes No Yes Replace the Solenoid Valve SVA if faulty Yes Cause Check Item Action Turn OFF Main Switch Phenomenon Excessively Low Compression Ratio Check compressor Replace comp if faulty Compressor is not Operating Check inverter Repair faulty part Inverter ...

Page 73: ... sensor if faulty Replace the solenoid valve SVA if faulty No No Yes Yes Is the four way valve spindle mounted at middle position Replace the four way valve if faulty No Yes Cause Check Item Action Turn OFF Main Switch Phenomenon Excessively Low Suction Pressure Check outlet pipe temp of solenoid valve SVA Check connecting wires Replace solenoid valve SVA if faulty Leakage of Solenoid Valve SVA Me...

Page 74: ...rant piping between the indoor and outdoor unit incorrectly connected Is the outdoor unit stop valve closed No No Yes Yes Correctly connect it Check the outdoor electronic expansion valve during cooling and the indoor electronic expansion valve during heating Yes Activation to Protect System from Excessively High Discharge Pressure Cause Check Item Action Turn OFF Main Switch Phenomenon Excessivel...

Page 75: ...s the amount of refrigerant correct Correctly charge refrigerant No 0 1 Check the outdoor unit PCB1 by self checking Replace it if faulty Yes Is the high pressure in the alarm area Check for leakage of refrigerant No Yes Is the connector CN7 of outdoor unit PCB1 loose Plug the connector CN7 correctly No Yes Is the high pressure sensor pipe clogged Is voltage between 1 and 3 of the connector CN7 of...

Page 76: ...lectronic ex valves if faulty No Yes NOTE In the case of H LINK system check the refrigerant system setting of the outdoor PCB and indoor PCB Cause Check Item Action Turn OFF Main Switch Phenomenon Check for conduction after temperature of outdoor fan motor is decreased Faulty Internal Thermostat Replace outdoor fan motor Fault Measure resistance by tester Remove looseness and replace connector In...

Page 77: ... of the absolute value of running current at each phase U U V and V is less than 0 5A including 0 5A Alarm Code Abnormality of Current Transformer 0A Detection For 5HP to 20HP Replace Comp Restart operation No Power wiring of Comp is not through CT Pass the wires through CT Faulty PCB3 and Replace PCB3 2 Compressor stops immediately nearly 18Hz Compressor is not operated P17 is appeared 1 How is c...

Page 78: ... frequency of compressor is maintained at 15 to 18Hz after compressor is started one of the absolute value of running current at each phase U U V and V is less than 0 5A including 0 5A Alarm Code Abnormality of Current Transformer For 24 and 30HP 1 P17 is shown at 7 segment on the outdoor unit PCB 2 Perform the high voltage discharge work by referring to 1 3 6 before checking and replacing the inv...

Page 79: ...replacing or the checking of inverter components refer to page 1 111 regarding electrical discharge Alarm Code Protection Activation Against Instantaneous Overcurrent of Inverter 1 For 5 to 20HP Refer to next page Restart operation Abnormal No Smaller than activation current Yes The circuit board is normal Is discharge pressure high Check pressure and refrigeration cycle Is the compressor current ...

Page 80: ...n other devices are operating Check the diode module 1 Is it a V or more during operation Replace the inverter circuit board Replace the inverter circuit board Restart operation Does it trip soon Are the input currents of three phases nearly equal 3 _ Replace the transistor module Yes Yes Yes Yes Yes Yes Yes It trips No No No No No No No No No Input currents out of balance It trips immediately Fau...

Page 81: ...nutes in 10 minutes 1 Regarding replacing or the checking of ISPM refer to page 1 114 regarding electrical discharge Alarm Code Protection Activation Against Instantaneous Overcurrent of Inverter 1 For 24 and 30HP Refer to next page Restart operation No Smaller than activation current Yes ISPM is normal Is discharge pressure high Check pressure and refrigeration cycle Is the compressor current lar...

Page 82: ...30HP Is the compressor running current as same as rated current Check ISPM 1 Restart operation Does it trip soon Are the input currents of three phases nearly equal 3 _ Yes Yes Yes Yes It trips No No No No No No Input currents out of balance It trips immediately Faulty Good Check the compressor Check the power source capacity Is there any cause of instantaneous voltage decrease It trips occasional...

Page 83: ...o and alarm code are indicated on the display of the outdoor unit PCB Transistor module 5 to 20HP or ISPM 24 and 30HP have detecting function of abnormality This alarm is indicated when the transistor module detect the abnormality 3 times in 30 minutes including 3 Retry operation is performed up to the occurrence of 2 times In Case of 5 to 20HP In case that the abnormality of alarm code 51 52 53 o...

Page 84: ...tion is performed up to second time of abnormality occurrence Conditions This alarm is indicated when the temperature of the internal themostat for ISPM is higher than 100o C 1 Regarding replacing or checking method for ISPM refer to page 1 114 2 Use the silicon grease provided as accessory Service Parts No P22760 Alarm Code Increase in Inverter Fin Temperature Only 24 and 30HP Yes No Restart oper...

Page 85: ... stopped Alarm Code Abnormality of Fan Motor Protection Only 24 and 30HP 220V 60Hz Are the connectors abnormal Good Replace the fan motor In the case that the fan motor does not run even the PCB is replaced replace ISPM Remove the foreign matter Does the motor run This alarm is indicated due to detected overcurrent by the contrary wind This is normal No Alarm code is not indicated Yes Does the fan...

Page 86: ...it board PCB1 right Is outdoor unit fan operating during the indication of alarm code Is the connection of CN13 at outdoor unit circuit board PCB1 and CN201 at AC chopper circuit board right No Abnormality of AC chopper circuit board PCB2 Yes Connect CT5 correctly Connect correctly Yes Is the connection of S3 R3 at outdoor unit circuit board PCB1 or faston of EF9 and S1 R1 at AC chopper circuit bo...

Page 87: ...r Unit No 00 Cycle System 00 Unit Code E 00 Alarm Code Incorrect Wiring Among Indoor Units Yes Is wiring among indoor units right No JP4 Repair the wiring among indoor units Turn off the main power switch and cut the wire JP4 at remote control switch then turn on the main power switch again Cause Check Item Action Turn OFF Main Switch Phenomenon Wiring Trouble Check the wiring No Repair the wiring...

Page 88: ... Current at Constant Comp 43 Pressure Ratio Decrease Protection Activating 44 Low Pressure Increase Protection Activating 45 High Pressure Increase Protection Activating 46 High Pressure Decrease Protection Activating 47 Low Pressure Decrease Protection Activating These alarms are able to be checked by the CHECK Mode 1 Follow the action indicated in each alarm chart These alarms are cleared only b...

Page 89: ...lly to a remote control switch are available You can press the CHECK switch to release Check Mode 2 Check Mode 1 cannot be released even if you press the CHECK switch Alarm Code Identifying the Last Fault that has Occurred in the Indicated Unit Unit number of connected unit or unit number for which checking mode was selected previously Unit Number and Alarm Code Displayed After 7 seconds Perform w...

Page 90: ...r Unit Intake Air Temp at Thermistor oC 2 Indoor Unit Discharge Air Temp at Thermistor oC 3 Indoor Unit Heat Exchanger Liquid Pipe Temp oC 4 Temperature at Remote Sensor o C 5 Outdoor Unit Ambient Air Temp o C 6 Indoor Unit Heat Exchanger Gas Pipe Temp oC 7 Outdoor Unit Evaporating Temp during Heating oC 8 Control Information 9 Discharge Gas Temp at the Top of Comp Chamber o C 10 See 1 3 1 Self Ch...

Page 91: ...w Pressure Increase 13 Retry due to High Pressure Increase 14 Retry due to Abnormal Current of Constant Compressor HP 8 15 Retry due to Abnormal High Temperature of Discharge Gas Excessively Low Suction Pressure 16 Retry due to Decrease of Discharge Gas Superheat 17 Retry due to Inverter Tripping 18 Retry due to Voltage Decrease 19 Expansion Valve Opening Change Protection 20 Operation Mode Change...

Page 92: ...cimal Indication J4 00 0F 00 when shipment DSW5 Indication with 16 numbers In case of models without Expansion Valve MV2 the same figure is indicated FX Series Only This is an indication for internal information for the remote control switch This does not have any specific meaning The total frequency is indicated when two compressors are running The capacity of the indoor unit is indicated as show...

Page 93: ...OTE 1 During transient period such as starting time etc may be indicated for a limited time NOTE 2 All the data during the check mode 2 will be changed to 00 if a power failure occurs during alarm indication to next page or 129 Thermistor Short circuited or PCB Defected F F or 255 Temp for Top of Comp 127 or 127 This is an indication for internal information for the remote control switch This does...

Page 94: ... are running This is an indication for internal information for the remote control switch This does not have any specific meaning The total frequency is indicated when plural compressor are running Outdoor Unit Expansion Valve MV1 Opening 14 Indoor Unit Expansion Valve Opening 13 Expansion Opening Indication Compressor Running Current A 15 Estimated Electric Current Indication Temperature Indicati...

Page 95: ...ceed reversely press the PSW3 switch for less than 2 seconds To cancel this checking press the PSW2 switch for more than 3 seconds The display will be changed to the indication one step before Then press the PSW2 switch once again for more than 3 seconds Backward Forward PSW2 PSW3 Total of Thermo ON Indoor Units Capacity PSW3 PSW2 2 PSW2 PSW3 Running Frequency of Inverter Compressor MC1 Checking C...

Page 96: ... oC Open circuited Short circuited oC oC Open circuited Short circuited oC Open circuited Short circuited o C Open circuited Short circuited PSW2 PSW3 PSW3 PSW2 PSW2 PSW3 For 8 to 30HP For 24 30HP For 24 30HP PSW3 PSW2 PSW2 PSW3 Discharge Gas Temperature on the Top of Compressor MC3 TD3 14 For 16 to 30HP Discharge Gas Temperature on the Top of Compressor MC4 TD4 15 Evaporating Temperature 1 at Hea...

Page 97: ...er connected Indoor Unit Heat Exchanger Liquid Pipe Temperature Freeze Protection No 0 Unit No F Unit 25 PSW2 PSW3 PSW3 PSW2 PSW2 PSW3 Indicates only the units number connected oC No 0 Unit o C No F Unit Indoor Unit Heat Exchanger Gas Pipe Temperature No 0 Unit No F Unit 26 PSW2 PSW3 PSW3 PSW2 PSW2 PSW3 Indicates only the units number connected A A o C Open circuited Short circuited Indicates runn...

Page 98: ... 1 Degeneration Control is not in Operation No 0 Unit Refer to page 1 81 Indoor Unit Cause of Stoppage No 0 Unit No F Unit PSW3 PSW2 30 PSW2 PSW3 PSW3 PSW2 PSW2 PSW3 Indicates only the units number connected Pressure Ratio Fall Protection Degeneration Control PSW3 PSW2 31 PSW2 PSW3 0 Degeneration Control is in Operation 1 Degeneration Control is not in Operation High Pressure Rise Protection Degen...

Page 99: ...The Latest Alarm Code Cause of Stoppage at Outdoor Unit PSW3 PSW2 40 PSW2 PSW3 Cause of Stoppage at Inverter PSW3 PSW2 41 PSW2 PSW3 Total Capacity Setting of Indoor Unit PSW3 PSW2 42 PSW2 PSW3 Total Quantity of Combined Indoor Unit PSW3 PSW2 43 PSW2 PSW3 Address of Refrigerant System PSW3 PSW2 44 PSW2 PSW3 sets 1 x HP 8 For 8 to 30HP For 16 to 30HP For 20 to 30HP displayed in 4 digit number displa...

Page 100: ...istor Module IPM Error Over Current Decrease Voltage Increase Temperature Instantaneous Over Current Electronic Thermal Activation Inverter Voltage Decrease Increase Voltage Abnormal Current Sensor Instantaneous Power Failure Detection Reset of Micro Computer for Inverter Code Cause Alarm Code Indication during Retry Abnormal Inverter Fin Thermistor Earth Fault Detection for Compressor Only Starti...

Page 101: ...ntinues for 30 minutes unless a protection control is indicated Retry indication disappears if the stop signal comes from all indoor units NOTE The protection control code being indicated on 7 segment display is changed to an alarm code when the abnormal operation occurs Also the same alarm code is indicated on the remote control switch Protection Control Pressure Ratio Control Code Protection Con...

Page 102: ... Compression Ratio Pd Ps 1 3 1 8 When activating 3 times in an hour 43 alarm is indicated P12 Ps 0 9MPa When activating 3 times in an hour 44 alarm is indicated For 5 to 20HP Ps 2 7MPa In case of 20 to 30Hz Pd 2 5MPa For 24 30HP Ps 2 7MPa P14 Current Maximum Value 1 or Current 0 9A When activating 3 times in an hour 39 alarm is indicated P15 In Case of Ps 0 02MPa over 12 minutes Discharge Gas Temp...

Page 103: ...the protection control 3 After retry control the condition of monitoring is continued for 30 minutes 4 The maximum value 1 is as follows 8HP 10HP 16HP 20HP Comp 2 Comp 3 4 Comp 2 Comp 3 4 Comp 2 Comp 3 4 24HP 17 8A 21 6A 18 8A 22 8A 36 2A 43 9A 30HP 17 8A 31 7A 18 8A 33 4A 36 2A 64 5A 23 9A 30 5A 36 2A 36 2A 12 6A 15 8A 18 8A 18 8A 380 415V 50Hz 380V 60Hz 220V 60Hz 380 415V 50Hz 380V 60Hz 220V 60H...

Page 104: ... DSW5 DSW7 7 9 3 1 5 11 12 2 5 12 9 11 10 7 1 3 6 EF2 EF1 7 9 11 12 13 CN2 THM1 THM2 THM3 THM4 THM5 CN1925 CN3 CN4 CN14 IP HA RSV CN12 CN13 CN9 LED1 LED3 LED4 DSW7 SV1 DSW3 DSW6 DSW5 PCN2 PCN3 PCN5 PCN6 PCN7 PCN1 PCN4 YH2 EFR1 EFS1 ICI1 ICI2 DM2 CN8 CN11 CN1 CN17 CN7 1 3 6 5 JP1 HIC1 4 7 9 10 12 2 5 6 3 1 11 1 Before Alteration 2 After Alteration a RCI a 2 b RPI 0 8 to 5 0HP b 1 b 2 c RCD c 1 c 2 ...

Page 105: ...g h 2 For Option Setting 6 DSW6 Setting of Unit Code h 2 For Refrigerant Cycle Setting In Case of Using H LINK 7 DSW7 Setting of Fuse Recover 9 LED1 This LED1 indicates the transmission state Red between the indoor unit and remote control switch Normal Condition Flickering Abnormal Condition Activated or Deactivated 10 LED2 This LED2 indicates the transmission state Green between the indoor unit a...

Page 106: ...3 RAS 8 and 10FXG RAS 8 and 10FX3 Before Manufacturing U4MV0196 After Manufacturing U4MV0197 Before Manufacturing U4NG1001 FSG FS3 Series EF7 EF8 CT3 CMC3 NF11 Only for RAS 16FSG RAS 16FS3 RAS 20FSG and RAS 20FS3 After Manufacturing U4NG1002 FSG FS3 Series From First Production FXG FX3 Series EF7 EF8 CT3 CMC3 NF11 Only for RAS 16FSG RAS 16FS3 RAS 20FSG and RAS 20FS3 ...

Page 107: ...EF1 EF2 EF9 CA2 ISPM DCL PCB2 R2 CMC1 TB5 CB1 CB2 R1 Electrical Control Box of Outdoor Unit Front Side For Inverter C1 NF7 Z NF1 TB2 TF2 CMC4 CMC2 CMC3 TF1 PCB1 TB1 TB4 TB3 Front Side For Control The Interior of the Electrical Control Box NF10 CMC3 TB2 CMC4 CMC2 TB4 TB1 TB3 NF5 NF10 NF2 NF4 NF3 EF3 EF4 EF5 EF6 EF7 EF8 CA1 CA3 C2 C3 C4 C5 NF2 NF3 NF4 ...

Page 108: ...for Fan Fan Speed Control PCB3 for Inverter 1 Inverter power part is driven by instruction of PCB1 and compressor is driven 2 Overcurrent Control 3 Protection Control for Inverter Part PCB5 for SNUBBER 1 Restraining of Surge Voltage added to Transistor Module IPM 2 Absorbing for Switching Noise of Transistor Module IPM Purpose RAS 24FSG1 RAS 24FS5 RAS 30FSG1 and RAS 30FS5 Front Side NF1 DCL CMC1 C...

Page 109: ...1 99 TROUBLESHOOTING a Control Printed Circuit Board PCB1 G 5HP to 20HP G 24HP and 30HP 2 14 16 18 18 12 11 13 10 15 1 6 7 8 9 3 4 5 2 14 16 18 18 12 11 13 10 15 1 6 7 8 9 3 4 5 ...

Page 110: ...6 Setting of Piping Length The total piping length between the outdoor unit and indoor unit is set 7 DSW7 Setting of Emergency Operation 8 DSW8 Test Operation and Service Setting II No setting is required 9 DSW9 Optional Function 2 10 DSW10 Transmitting Setting 11 PSW1 Manual Defrosting Switch The defrosting operation is manually available under the forced defrosting area 12 PSW2 Check Switches 13...

Page 111: ... No 1 and No 2 of DSW1 are OFF Emergency Operation or Troubleshooting No 1 of DSW1 is ON No 2 of DSW1 is OFF The above setting aims not to trip even if the CT detects 0A Name of Printed Circuit Board LED1 Red This indicates the state of transmission Flickering Normal Transmission Activated or Deactivated Abnormality in Transmission Circuit LED2 Red This indicates the voltage between both terminal ...

Page 112: ...del and 380V 60Hz Model Before Manufacturing U4NG1001 LED Function on Outdoor Unit Printed Circuit Board Name of Printed Circuit Board LED3 Red This indicates the voltage between both terminal of capacitor CB1 and CB2 for inverter part Activated The voltage between both terminals of capacitor CB is 50V 20V or greater Deactivated The voltage between both terminals of capacitor CB is 50V 20V or smal...

Page 113: ... PSH Input Failure ITO Input Failure Transmission of Outdoor Unit This Checking Operation Transmission of Indoor Unit during Zero Cross Input Failure EEPROM Transmission of Central Station Remote Sensor Gas Pipe Temp Thermistor Remote Thermistor Abnormality Liquid Pipe Temp Thermistor Discharge Air Temp Thermistor Intake Air Temp Thermistor Abnormality Open circuit Short circuit etc in circuit for...

Page 114: ...e remote control switch Check the wiring between the remote control switch and indoor unit 2 In this troubleshooting procedure checking of the following part of the PCB s is not available PCB in Indoor Unit Relay Circuit Dip Switch Option Circuit Fan Circuit Protection Circuit PCB in Outdoor Unit Relay Circuit Dip Switch Option Circuit 3 In the case that this troubleshooting is performed in the sy...

Page 115: ...following 3 switches During operation they can be depressed TEMP 4 After the LCD indication changes as shown in the right figure the RUN indicator flickers twice To the next page 6 The LCD indication changes as shown below The remote control switch automatically starts to check the transmission circuit 5 The LCD indication changes as shown below Depress all the switches 13 switches one by one Ever...

Page 116: ...ol switch is activated again the RUN indicator is ON and the operation is started Therefore depress switch and stop operation NOTES 1 In case that the operation is not automatically started when the remote control switch is activated again the detection circuit for momentary stoppage may be abnormal However it would not interfere the normal operation 2 There is a case that the operation is automat...

Page 117: ...tch and Self Checking Function Procedure Refer to pages 1 94 95 for location and function of DSW and LED a Turn OFF the main power switch b Disconnect connectors CN5 and CN8 and set dip switch DSW2 as shown below NOTE Before turning ON the power see checking procedure mentioned in next page c Turn ON the main power switch Check Mode starts See next page Analog Test Relay Test d After completion of...

Page 118: ...rmination Turn OFF and reset all dip switches as they were Check Item State of Mode Confirmation Method A Initialize Exp Valve Exp Valve fully open fully close and Auto Louver Auto Louver is horizontally stopped B Analog Test If each thermistor for intake air discharge air and freeze protection is normal proceed to the next step C Each Relay Test Check ON OFF sound of relays Repeatedly Perform Ter...

Page 119: ...tions activated for 5 seconds All the LCD indications deactivated for 1 second All the LCD indications activated for 5 seconds All the LCD indications deactivated for 1 second After 15 Seconds NORMAL NORMAL Completion of self checking 77 is indicated for 3 seconds Return to the indication before the self checking Checking of Touch Type Switch Function Depress all the touch type switches one by one...

Page 120: ...indications deactivated for 1 second All the LCD indications activated for 5 seconds All the LCD indications deactivated for 1 second After 15 Seconds NORMAL NORMAL Checking of Transmission Circuit Automatically checked and the result will be indicated as figure right for 3 seconds Return to the indication before the self checking Checking of Touch Type Switch Function Depress all the touch type s...

Page 121: ... on transistor module 5 to 20HP or ISPM 24 and 30HP Discharging is started resulting in hot brazer Pay attention not to short circuit between terminal P and N d Wait for 2 or 3 minutes and measure the voltage once again Check to ensure that no voltage is charged Power Supply Manufacturing A Case Before U4NG1001 FSG FS3 LED3 on PCB5 1 After U4NG1002 FSG FS3 From the First Production FXG FX3 220V 60...

Page 122: ...touching the side of the tester to the P terminal of transistor module and the side of tester to U V and W of transistor module measure the resistance If all the resistances are greater than 100 kΩ it is normal P B N U V W P B N U V W U V W N B P Vcc Fo In GND Out S1 GND V UP U Fo U P V UPC Vcc Fo In GND Out S1 GND V VP V Fo V P V VPC Vcc Fo In GND Out S1 GND V WP W Fo W P V WPC Vcc Fo In GND Out ...

Page 123: ...esults are satisfactory the diode module is normal Measure it under 1 kΩ range of a tester Do not use a digital tester a By touching the side of the tester to the terminal of the diode module and the side of tester to the terminals 3 NOs of the diode module measure the resistance If all the resistances are from 5 to 50 kΩ it is normal b By touching the side of the tester to the terminal of the dio...

Page 124: ... is normal Measure it under 1 kΩ range of a tester Do not use a digital tester a By touching the side of the tester to the P1 terminal of ISPM and the side of tester to R S and T of ISPM measure the resistance If all the resistances are more than 100 kΩ it is normal b By touching the side of the tester to the P1 terminal of ISPM and the side of tester to R S and T of ISPM measure the resistance If...

Page 125: ...V T U N PD P TB2 R216 R215 ZN20 LED201 ZN202 R201 R200 CN207 CN206 CN9 PC207 C PC208 CN8 RB N P P1 N R S T e By touching the side of the tester to the P terminal of ISPM and the side of tester to U V and W of ISPM measure the resistance If all the resistances are more than 100 kΩ it is normal f By touching the side of the tester to the P terminal of ISPM and the side of tester to U V and W of ISPM...

Page 126: ...N207 CN206 CN9 PC207 C PC208 CN8 RB N P P1 U V W N If item i to m are performed and the results are satisfactory ISPM is normal Measure it under 1 kΩ range of a tester Do not use a digital tester i Perform the item a to h j By touching the side of the tester to the RB terminal of ISPM and the side of tester to P terminal of ISPM If the resistance is more than 1 kΩ it is normal k By touching the si...

Page 127: ...nits are under cooling operation Locked It is abnormal under the following with conditions After heating operation for Fully Open more than 30 min the discharge gas temperature of compressor is not 10o C higher than the condensing temperature and there is no other faults such as excessive charge of refrigerant etc l By touching the side of the tester to the RB terminal of ISPM and the side of test...

Page 128: ... Unit BL 1 3 R SF 200 290 4RB R 3 5 W 290W for RPI 5 0FSG1 Fan Motor for Indoor Unit SIC 72FV D856 56W for RCI 1 0 to 3 0FSG2 DC Motor Fan Motor for Indoor Unit SIC 81F D8108 108W for RCI 4 0FSG2 5 0FSG2 Fan Motor for Indoor Unit BL 1 3 R 159 0 10 CCC6719AH R 3 5 W 92 0 10 at 20o C 35W for RCD 1 0 to 2 0FSG1 Fan Motor for Indoor Unit BL 1 3 R 70 9 10 CCC6720AH R 3 5 W 51 7 10 at 20o C 55W for RCD ...

Page 129: ...or RPC 2 5FSG1 3 0FSG1 50W at 20o C Before Alteration Fan Motor for Indoor Unit BL 1 3 R 40 10 TNO KPPA R 3 5 W 54 10 for RPC 4 0FSG1 95W at 20o C Before Alteration Fan Motor for Indoor Unit BL 1 3 R 25 10 TNO KPPA R 3 5 W 40 10 for RPC 5 0FSG1 135W at 20o C Before Alteration Fan Motor for Indoor Unit BL 1 3 R 81 4 10 SF 200 35 4T R 3 5 W 99 0 10 for RPC 2 0FSG1 35W at 20o C After Alteration Fan M...

Page 130: ...01K RAS 10FXG RAS 10FX3 for Right Side of 275W RAS 16FSG RAS 16FS3 RAS 20FSG RAS 20FS3 for Center of RAS 24FSG1 RAS 24FS5 RAS 30FSG1 RAS 30FS5 380 415 380V 50 60Hz Fan Motor for Outdoor Unit 4 1 6 74 1 3 5 91 NF7011 for Left Side of RAS 16FSG RAS 16FS3 275W RAS 20FSG RAS 20FS3 for Right and Left Side of RAS 24FSG1 RAS 24FS5 RAS 30FSG1 RAS 30FS5 Fan Motor for Outdoor Unit 1 2 5 37 2 3 5 37 KNF5501 ...

Page 131: ...435 for RAS 5FSG 8FSG 10FSG 8FXG 10FXG RAS 10FSG 10FXG at 20o C RAS 5FS3 8FS3 10FS3 8FX3 10FX3 RAS 10FS3 10FX3 4 Way Valve 1 435 at 20o C for RAS 16FSG 20FSG 16FS3 20FS3 Compressor Motor 1 436 1 436 0 395 at 20o C for RAS 5FS3 Compressor Motor 1 436 1 436 0 395 for RAS 8FS3 10FS3 16FS3 20FS3 at 20o C 8FX3 10FX3 Compressor Motor 3 29 2 68 0 74 at 20o C for RAS 8FS3 8FX3 Compressor Motor 2 73 2 22 0...

Page 132: ...or for Compressor Motor A35 501 401 FC 1S 656 460 for RAS 16FSG 20FSG at 20o C RAS 16FS3 20FS3 50 60Hz Compressor Motor 0 944 0 944 0 211 at 20o C for RAS 24FS5 30FS5 Compressor Motor 2 48 2 06 0 53 at 20o C for RAS 24FS5 30FS5 Compressor Motor 1 47 1 32 0 35 at 20o C for RAS 24FS5 Compressor Motor 1 07 0 90 0 25 at 20o C for RAS 30FS5 Compressor Motor 0 944 0 944 0 211 at 20o C for RAS 24FSG1 30F...

Page 133: ...wer source wires U and V Check to ensure that wires are correctly inserted correctly into current sensor inserted 8 Are ex valves MV1 MV2 and MVB Check to ensure that MV1 to CN10 and correctly connected MV2 to CN11 are correctly connected 9 Are ex valve coils MV1 MV2 and MVB Check to ensure that each coil is correctly correctly mounted mounted on the valve 10 Are the refrigeration cycle and electr...

Page 134: ...g resulting in winding insulation failure 8 9 During a cooling operation Pd is controlled by fan revolution of outdoor unit and Td and SH are controlled by MV of each indoor units or MVB for FX series During a heating operation Td and SH are controlled by MV1 and MV2 If expansion valves are incorrectly connected correct control is not available resulting in compressor seizure depending on liquid r...

Page 135: ... incorrect When one remote control switch controls multiple units Counting number of connected units is incorrect Fault Inspection Points after the Power Source OFF Remote Control Switch Indication The operation lamp flickers 1 time 1 sec And the Unit No and Alarm Code 03 flicker The unit does not start The connecting wires of operating line are incorrect or loosened The unit does not start The co...

Page 136: ... guard 1 Defrost operation is available regardless of frosting condition and total time of heating operation 2 Defrost operation in not performed when the temperature of outdoor heat exchanger is higher than 10o C high pressure is higher than 2 0MPa 20 kgf cm2G or Thermo OFF Take care that the indoor units operate in accordance with the test run operation of the outdoor unit The test run is starte...

Page 137: ... I U Model I U Serial No Check Item Was the dip switch DSW6 for piping length in O U set Check Item Result Is there any voltage abnormality among each phase L1 L2 L2 L3 L3 L1 L1 N In case that the constant compressor is turned ON and OFF repeatedly stop one indoor unit small capacity one Operate all the indoor units TEST RUN mode Operate all the indoor units at HIGH speed Is Pd 1 2 to 2 2 If the o...

Page 138: ...Temp of I U It is normal when TL Ti 5 TL Thermistor Failure Ex Valve Fully Closed Short Circuit 6 Is TG Gas Pipe Temp of I U Heat Exchanger lower than Ti Intake Air Temp of I U It is normal when TG Ti 5 TG Thermistor Failure Ex Valve Fully Closed or Slightly Open Short Circuit 7 Is there any excessive difference among I U at SHTG TL of I U heat exchanger It is applicable when Intake Air Temp is 3d...

Page 139: ...lower is the room temp and outdoor temp the higher is the above value Low Excessive Refrigerant High Insufficient Refrigerant Excessive Pipe Resistance 4 Is Pd 0 2 to 0 5 Only under the condition that electrical expansion valve SVA is OFF Low O U Short circuit Low High O U Fan Thyristor Failure or Outdoor Air Sensor Failure 5 Is the temperature difference between I U more than 15 deg when iE I U E...

Page 140: ......

Page 141: ...ve the air intake grille by pulling and unhooking each hook Phillips Screwdriver Tool TURN OFF all power source switches Insert Insert Screw Insert Insert Insert Screw Screw Insert Insert Insert Insert Insert RAS 5FSG to RAS 10FSG RAS 5FS3 to RAS 10FS3 RAS 8FXG RAS 10FXG RAS 8FX3 RAS 10FX3 RAS 16FSG RAS 20FSG RAS 16FS3 RAS 20FS3 RAS 24FSG1 RAS 30FSG1 RAS 24FS5 RAS 30FS5 ...

Page 142: ...ol NOTE When removing screws for front service panel remove the screw at the lower part of panel firstly Screw Remove this first Screw Remove this first Screw Remove this first TURN OFF all power source switches RAS 5FSG to RAS 10FSG RAS 5FS3 to RAS 10FS3 RAS 8FXG RAS 10FXG RAS 8FX3 RAS 10FX3 RAS 16FSG RAS 20FSG RAS 16FS3 RAS 20FS3 RAS 24FSG1 RAS 30FSG1 RAS 24FS5 RAS 30FS5 ...

Page 143: ...ove the one TURN OFF all power source switches Phillips Screwdriver Tool RAS 5FSG to RAS 10FSG RAS 5FS3 to RAS 10FS3 RAS 8FXG RAS 10FXG RAS 8FX3 RAS 10FX3 RAS 16FSG RAS 20FSG RAS 16FS3 RAS 20FS3 RAS 24FSG1 RAS 30FSG1 RAS 24FS5 RAS 30FS5 Remove this first Screw Fan Guard Net Screw Fan Guard Net Screw Fan Guard Net ...

Page 144: ...ropeller fans onto the motor shafts If it is difficult to remove the fan use a puller Spanner Adjustable Wrench or Puller Tool TURN OFF all power source switches Electrical Box Electrical Box Electrical Box Propeller Fan Nut Flat Washer Motor Shaft RAS 5FSG to RAS 10FSG RAS 5FS3 to RAS 10FS3 RAS 8FXG RAS 10FXG RAS 8FX3 RAS 10FX3 RAS 16FSG RAS 20FSG RAS 16FS3 RAS 20FS3 RAS 24FSG1 RAS 30FSG1 RAS 24F...

Page 145: ...ghtening torque from 14 55 N m to 15 0 N m after the head of the fan shaft comes up 4 Connect the motor wires to the electrical connecting part at the upper part of the electrical box 3 Removing Wires a Remove two 2 screws fixing the electrical box cover and remove the electrical box cover b Disconnect the connectors for the motors in the electrical box c Remove the motors by removing four 4 fixin...

Page 146: ...ctly connected the compressor will fail due to reverse rotation Before starting this work collect refrigerant into a cylinder from the cycle 1 Remove front service panel according to the item 2 1 2 Removing Front Service Panel 2 Release the lace for top cap of the compressor and remove the top cap 3 Remove the Td thermistor on the top of the compressor NOTE The thermostat fixer holder thermostat h...

Page 147: ...s are not identified at reassembling the compressor will fail due to reverse rotation NOTES 1 Check to ensure that the faston terminals for the compressor are normal When a pulling force of 20N or more is required it is normal If abnormal replace the faston terminals with new ones 2 Check to ensure that wires are firmly fixed 3 It is recommended that the faston terminals be clamped to increase a c...

Page 148: ...ease the oil heater TURN OFF all power source switches 7 Disconnect the discharge pipe of the compressor Use two spanners when disassembling the flare nuts Adjustable Wrench or Spanner Tool Spring Remove the spring by expanding the spring as shown Oil Heater Heater Cover Discharge Pipe Two Spanners ...

Page 149: ...r Phillips Screwdriver Tool 9 Remove three nuts fixing the compressor and remove the compressor NOTE When lifting the compressor hold the discharge pipe vertically and turn it to the right and pull the compressor towards the front side by paying attention to the compressor leg not to touch the suction pipe 10 Regarding remounting the compressor work perform the above work in the reverse processes ...

Page 150: ... when connecting compressor power wires If incorrectly connected the compressor will fail due to reverse rotation Before starting this work collect refrigerant into a cylinder from the cycle 1 Remove front service panel according to the item 2 1 2 Removing Front Service Panel 2 Release the lace for top cap of the compressor and remove the top cap 3 Remove the Td thermistor on the top of the compre...

Page 151: ...to reverse rotation NOTES 1 Check to ensure that the faston terminals for the compressor are normal When a pulling force of 20N or more is required it is normal If abnormal replace the faston terminals with new ones 2 Check to ensure that wires are firmly fixed 3 It is recommended that the faston terminals be clamped to increase a contacting force after replacing the compressor TURN OFF all power ...

Page 152: ... when disassembling the flare nuts Adjustable Wrench or Spanner Tool 6 Remove the heater cover and the spring for the oil heater and release the oil heater TURN OFF all power source switches Spring Remove the spring by expanding the spring as shown Oil Heater Heater Cover Discharge Pipe Two Spanners ...

Page 153: ... oil if the oil is spread to the other parts such as the compressor cover wiring bottom base etc If not this will cause many problems to the unit 2 If the oil is spilt charge new oil equivalent to the spilt oil 3 Check to ensure that the oil is not foul If foul replace it with new one Adjustable Wrench or Spanner Tool TURN OFF all power source switches Feeding Oil Pipe Oil Pan Oil Separator 9 Remo...

Page 154: ...compressor is put outside the unit Constant Comp Only 2 When lifting the compressor hold the discharge pipe vertically and turn it to the left and pull the compressor towards the front side by paying attention to the compressor leg not to touch the suction pipe 11 Regarding remounting the compressor work perform the above work in the reverse processes Front Side Special Nut Lift and move towards l...

Page 155: ...g this work collect refrigerant into a cylinder from the cycle 1 Remove front service panel according to the item 2 1 2 Removing Front Service Panel 2 Release the lace for top cap of the compressor and remove the top cap 3 Remove the holder for Td thermistor on the compressor 4 Remove the Td thermistor on the top of the compressor NOTE The thermostat fixer holder thermostat holder and holder for T...

Page 156: ...ssembling the compressor will fail due to reverse rotation NOTES 1 Check to ensure that the faston terminals for the compressor are normal When a pulling force of 20N or more is required it is normal If abnormal replace the faston terminals with new ones 2 Check to ensure that wires are firmly fixed 3 It is recommended that the faston terminals be clamped to increase a contacting force after repla...

Page 157: ...the other parts such as the compressor cover wiring bottom base etc If not this will cause many problems to the unit 2 If the oil is spilt charge new oil equivalent to the spilt oil 3 Check to ensure that the oil is not foul If foul replace it with new one Adjustable Wrench or Spanner Tool TURN OFF all power source switches 8 Disconnect the discharge pipe of the compressor Use two spanners when di...

Page 158: ...mp Only 2 When lifting the compressor hold the discharge pipe vertically and turn it to the left and pull the compressor towards the front side by paying attention to the compressor leg not to touch the suction pipe 12 Regarding remounting the compressor work perform the above work in the reverse processes 10 Remove the suction pipe of the compressor Adjustable Wrench or Spanner Tool Suction Pipe ...

Page 159: ...or just before replacing the compressor Check to ensure each terminal No when connecting compressor power wires If incorrectly connected the compressor will fail due to reverse rotation Before starting this work collect refrigerant into a cylinder from the cycle 1 Remove front service panel according to the item 2 1 2 Removing Front Service Panel 2 Release the lace for top cap of the compressor an...

Page 160: ...isconnect the compressor wires NOTE Check the terminal No and mark band at disconnecting work If wired wrong when reassembling the compressor will be damaged due to reverse rotation TURN OFF all power source switches 6 Remove the suction pipe connecting flange with four bolts and discharge pipe connecting with flare nut Adjustable Wrench or Spanner Phillips Screwdriver Tool Suction Pipe Discharge ...

Page 161: ... reassembling Keep them in a box so that the parts are stored correctly Adjustable Wrench or Spanner Phillips Screwdriver Tool TURN OFF all power source switches 8 Remove the 2 screws fixing the compressor base The compressor base is fixed by 2 screws at front of the unit Adjustable Wrench or Spanner Phillips Screwdriver Tool Remove fixing screws for the compressor base Thermostat Holder Holder Td...

Page 162: ... work Adjustable Wrench or Spanner Phillips Screwdriver Tool 10 Remove the 4 special nuts 4 vibration proof rubbers water proof cover oil heater and slide bases from the compressor NOTE The special nuts vibration proof rubbers slide bases oil heater and water proof cover are used again when reassembling Keep them in a box so that the parts are stored correctly Adjustable Wrench or Spanner Phillips...

Page 163: ...nd RAS 10FX3 High Pressure Switch High Pressure Switch High Pressure Switch High Pressure Switch High Pressure Check Joint High Pressure Check Joint High Pressure Check Joint High Pressure Check Joint Check Joint for High Pressure Sensor Check Joint for High Pressure Sensor Check Joint for Low Pressure Sensor Check Joint for Low Pressure Sensor Check Joint for Low Pressure Sensor Check Joint for L...

Page 164: ...ycle If exposed for a long period seal the hole TURN OFF all power source switches Adjustable Wrench or Spanner Phillips Screwdriver Tool A 2 Removing High Pressure Switch RAS 16FSG RAS 20FSG RAS 16FS3 RAS 20FS3 RAS 24FSG1 RAS 30FSG1 RAS 24FS5 and RAS 30FS5 1 Disconnect the high pressure switch from the union NOTE Do not expose the refrigeration cycle to the atmosphere for a long period to avoid m...

Page 165: ... screws for the pressure sensors NOTE Put the water proof caps on the pressure sensors again after replacing pressure sensors TURN OFF all power source switches Adjustable Wrench or Spanner Phillips Screwdriver Tool RAS 5FSG 5FS3 8FSG 8FS3 10FSG 10FS3 RAS 8FXG 8FX3 10FXG 10FX3 RAS 16FSG 16FS3 20FSG 20FS3 RAS 24FSG1 24FS5 30FSG1 30FS5 Firstly remove the check joint at the main pipe If the sensor si...

Page 166: ...when the LED3 Red on the SNUBBER PCB PCB5 or the LED2 Red on the Inverter PCB PCB3 is lit since the voltage is higher than 50V Adjustable Wrench Spanner Phillips Screwdriver Tool The arrow mark indicates the position of the reversing valve coil The figure is the front view one Reversing Valve Coil RAS 24FSG1 24FS5 30FSG1 30FS5 RVR2 RAS 5FSG 5FS3 8FSG 8FS3 10FSG 10FS3 RAS 8FXG 8FX3 10FXG 10FX3 RAS ...

Page 167: ... Tool Details of A Details of B Details of C Solenoid Valve Coil Solenoid Valve Coil Solenoid Valve Coil SVF1 SVF2 for Oil Return SVE1 SVE2 for Heat Exchanger SVA1 to SVA4 for Gas Bypass SVD1 SVD2 for Heat Exchanger Change SVD1 SVA3 SVA4 SVF1 SVF2 SVE1 SVE2 SVD2 A B B B C C SVA1 SVA2 The solenoid valve 20D2 is located at behind the electrical box RAS 24FSG1 30FSG1 24FS5 and 30FS5 Solenoid Valve Co...

Page 168: ...d remove the thermistor for the liquid pipe 2 1 12 Removing Thermistor for Liquid Pipe TURN OFF all power source switches Do not touch the electrical parts when the LED3 Red on the SNUBBER PCB PCB5 or the LED2 Red on the Inverter PCB PCB3 is lit since the voltage is higher than 50V RAS 5FSG 5FS3 8FSG 8FS3 10FSG 10FS3 RAS 8FXG 8FX3 10FXG 10FX3 RAS 16FSG 16FS3 20FSG 20FS3 THM10 THM11 Thermistor Ther...

Page 169: ... ensure that all stop valves are open TURN OFF all power source switches 5 Disconnect the following to remove the reversing valve a Brazing Portion between Reversing Valve and Discharge Pipe b Brazing Portion of the Right and the Left Pipes of Three Pipes from the Reversing Valve c Brazing Portion of the Center Pipe of Three Pipes from the Reversing Valve NOTE Cover the reversing valve with wet cl...

Page 170: ...ns and check to ensure that two stop valves are open TURN OFF all power source switches 5 Disconnect the following to remove the reversing valve a Brazing Portion between Reversing Valve and Discharge Pipe b Brazing Portion of the Right and the Left Pipes of Three Pipes from the Reversing Valve c Brazing Portion of the Center Pipe of Three Pipes from the Reversing Valve NOTE Cover the reversing va...

Page 171: ...nect the U phase of the power cable and U phase of the current sensor as a combination and the V phase of the power cable and V phase of the current sensor as a combination respectively If incorrectly connected malfunction or damages will occur 4 Do not clamp electrical wires between a mounting electric component and plates or electric parts when a PCB is remounted 5 Screws bushes and collars are ...

Page 172: ...ews fixing the mounting plate for the AC chopper and turn the plate towards the front side Phillips Screwdriver Tool 3 Removing Magnetic Contactor for Inverter Compressor a Remove two 2 screws fixing the mounting plate for the PCB and turn the plate towards the front side b Remove two 2 screws fixing the magnetic contactor for inverter compressor Phillips Screwdriver Tool Mounting Plate for AC Cho...

Page 173: ...t radiation fins spread silicone grease made by Shinetsu Chemical Co G746 lightly over the surface touching fins 2 Identify terminals Nos with the mark band Nos when reassembling If incorrectly connected malfunctions or damages of electric components will occur 3 Connect the cables of the inverter compressor correctly to ISPM 1 If incorrectly connected malfunction or damages will occur 4 Do not cl...

Page 174: ...1 2 Removing Front Service Panel a Disconnect the cables connected to each electrical part b Remove screws for the electrical parts mounting c When replace the electrical box behind the PCB mounting plate remove two 2 screws for the PCB mounting plate and turn the plate towards the front side Phillips Screwdriver Pincher Nippers Tool T L3 L1 L2 R S MP N S T R L1 L2 L3 N M63826P M63826P IC9 IC2 C12...

Page 175: ... 1 2 Removing Front Service Panel a Disconnect the cables connected to each electrical part b Remove screws for the electrical parts mounting NOTES 1 Do not touch the electrical part of the PCB 2 Do not apply a great force to the PCB Phillips Screwdriver Pincher Tool Do not touch the any electrical parts during LED201 Red on ISPM 1 is ON If touched electric shock will occur TB3 P1 CN206 LED201 CN2...

Page 176: ... screws for the inverter electrical box cover so that it does not fall off b Disconnect the connectors and cables to the ISPM2 c Remove two 2 screws fixing the ISPM2 and remove it NOTE Do not apply a great force to the PCB otherwise the ISPM2 will be damaged Phillips Screwdriver Pincher Tool Fixing Screw for ISPM2 Control Cable for Fan Motor Control Cable Power Cable for Fan Motor U V W R S T N P ...

Page 177: ... is a case that the replacement of the long life filter is not easily performed depending on the installation manners Check it carefully 2 2 2 Removing Printed Circuit Board PCB 1 Loosen two 2 M4 screws fixing the electrical box cover and remove the electrical box cover by lifting it upwards Phillips Screwdriver Tool TURN OFF all power source switches Electrical Box Cover Screws ...

Page 178: ...r it will cause a malfunction Before Minor Change After Minor Change G RPI 0 8FSG1 to RPI 2 5FSG1 Connector for Thermistor Connector for Float Switch Connector for Expansion Valve PCB1 TB PCB2 AC Chopper Module PCB2 AC Chopper Module Connector for Thermistor Connector for Float Switch Connector for Expansion Valve PCB1 G RPI 3 0FSG1 to RPI 5 0FSG1 Before Minor Change PCB2 AC Chopper Module PCB Con...

Page 179: ...he float switch electrical wiring Disconnect the connectors for the electronic expansion valve the gas pipe thermistor liquid pipe thermistor discharge gas thermistor and the fan motor from the PCB There are two 2 connectors for the fan motor One is located on the AC chopper module PCB and remove it Removing Indoor Fan and Fan Motor from Side Electrical Box Side of Unit Only for RPI 3 0 to 5 0FSG1...

Page 180: ...xing plate Phillips Screwdriver Tool TURN OFF all power source switches 5 Remove four 4 M4 screws fixing the casing at the side of the casing and remove the ring of the casing Phillips Screwdriver Tool 6 Loosen the screw fixing the fan runner onto the fan motor shaft by the adjustable wrench and pull out the fan runner Ring Runner Fixing Screw Runner Wire Clamp Wire ...

Page 181: ...n pulling out the casing turn the casing by an angle of 180 Phillips Screwdriver Tool 8 Remove two 2 M4 screws fixing the flange in front of the fan motor and remove the flange Phillips Screwdriver Tool TURN OFF all power source switches Flange M4 Screws Rotate the casing by 180o Pull out the casing at this position M4 Screws M4 Screws ...

Page 182: ...runner at the same time Phillips Screwdriver Tool TURN OFF all power source switches 11 Loosen the screw fixing the runner onto the fan motor by the adjustable wrench and pull out the runner Phillips Screwdriver Adjustable Wrench Tool ATTENTION The total weight of the motor base the fan motor the ring and the runner is approximately 15kg Carefully perform the above removing work Runner Fixing Scre...

Page 183: ... ty A fixing the suction flange Q ty of Screws A 2 For RPI 0 8 to 1 5FSG1 3 For RPI 2 0 to 4 0FSG1 4 For RPI 5 0FSG1 Phillips Screwdriver Tool 4 Remove the lower M4 screws Q ty B fixing the lower cover at the indoor fan side and remove the lower cover Q ty of Screws B 11 For RPI 0 8 to 1 5FSG1 12 For RPI 2 0 to 5 0FSG1 Phillips Screwdriver Tool TURN OFF all power source switches Screws M4x A Sucti...

Page 184: ...the casing onto the fan fixing plate and move the casing slightly 7 Remove two 2 M4 screws fixing the motor fixing band to the motor base and remove the motor the casing and the runner at the same time Phillips Screwdriver Tool ATTENTION The total weight of the motor base the fan motor the ring and the runner is approximately 15kg Carefully perform the above removing work TURN OFF all power source...

Page 185: ...f the casing and remove the lower part of the casing Q ty of Screws C 2 For RPI 0 8 to 1 5FSG1 4 For RPI 2 0 to 2 5FSG1 Phillips Screwdriver Tool 7 Remove two 2 screws fixing the motor fixing band to the motor base and remove the runner with the motor shaft 8 Loosen the screws fixing the fan motor and the runner by the hexagonal wrench for M6 screw and pull out remove the runner Phillips Screwdriv...

Page 186: ... service cover and remove the service cover Phillips Screwdriver Tool TURN OFF all power source switches 2 Remove the cork tape pipe insulations and the thermistor holder the thermistors for pipes can be removed Phillips Screwdriver Tool Screws M4 x 8 Service Cover Expansion Valve Thermistor for Liquid Piping Thermistor for Gas Piping ...

Page 187: ...ol Phillips Screwdriver Spanner Tool 2 2 6 Removing Float Switch 1 Remove the service cover according to the item 2 2 4 Removing Thermistor for Liquid Piping and Gas Piping 2 The float switch is fixed on the heat exchanger fixing plate Remove the float switch by using two spanners ATTENTION When reassembling handle the float switch carefully Tightening Torque Approx 0 3N m If the float switch is d...

Page 188: ...ving Drain Pump In case of the units with the drain pump RPI 0 8 to 1 5FSG1 the drain pump is fixed on the service cover Remove the fixing screws and remove the drain pump TURN OFF all power source switches Indoor Unit Drain Connection Service Cover A A View from Drain Pan Drain Pump ...

Page 189: ...FSG1 3 For RPI 2 0 to 4 0FSG1 4 For RPI 5 0FSG1 Phillips Screwdriver Tool 2 Remove the lower M4 screws Q ty B fixing the lower cover at the indoor fan side and remove the lower cover Q ty of Screws B 11 For RPI 0 8 to 1 5FSG1 12 For RPI 2 0 to 5 0FSG1 Phillips Screwdriver Tool TURN OFF all power source switches Screws M4x A Suction Flange Screws M4x B Lower Cover ...

Page 190: ...wer source switches 4 Remove eight 8 M4 screws fixing the lower cover at the indoor heat exchanger side and remove the lower cover 5 Remove M4 screws eight 8 for each side fixing the side frames at both sides and remove the side frames 6 Pull the drain pan downward Phillips Screwdriver Bucket approx 5 liters content Tool Discharge Flange Screws M4xD Screws M4x8 Both Sides Side Frame Drain Pan Side...

Page 191: ...rinted Circuit Board PCB 1 Loosen four 4 screws fixing the electrical box cover and remove the electrical box cover by lifting it upwards 2 The PCB is fixed with four 4 PCB holders Clamp the center of the PCB holders by a long nose plier and pull out the PCB Phillips Screwdriver Long nose Pliers Tool ATTENTION Do not touch any parts on the PCB Do not apply a strong force to the PCB or it will caus...

Page 192: ...ng the electrical box and remove the electrical box on the unit as shown Phillips Screwdriver Tool TURN OFF all power source switches 5 Remove three 3 screws fixing the ring and remove the ring 6 Loosen the screw fixing the fan runner onto the fan motor shaft and remove the near side fan runner 7 Remove the screw fixing the fan casing and pull out the near side fan casing Phillips Screwdriver Hexa...

Page 193: ... fan casing and remove the ring Phillips Screwdriver Tool 9 Remove four 4 screws fixing the motor base 10 Pull out the fan motor with motor base Do not pull out the rear side fan casing Phillips Screwdriver Tool TURN OFF all power source switches Ring Fixing Screws Fan Casing Ring Motor Motor Base ...

Page 194: ...er 2 Remove four 4 screws fixing the maintenance cover and remove the maintenance cover Phillips Screwdriver Tool TURN OFF all power source switches 3 Remove the electronic expansion valve by using two 2 spanners 4 Remove the thermistors attaching the pipe of heat exchanger Phillips Screwdriver Spanner Tool Maintenance Cover Screws Heat Exchanger Cover Screws Thermistor Expansion Valve ...

Page 195: ...rille by supporting the lower side of the air intake grille and filter and unhooking it from the extrusion part 2 4 2 Removing Air Intake Grille By lifting the air intake grille at an angle of approximately 30 and releasing its chain the air intake grille can be removed by holding it upwards and then towards you If the chain is released and the angle is 90 the air intake grille can not be removed ...

Page 196: ...electrical box cover and remove the cover Phillips Screwdriver Tool TURN OFF all power source switches Electrical Box Cover Screws 2 4 4 Removing Optional Air Panel 1 Remove the electrical box cover according to the item 2 4 3 Removing Electrical Box Cover Disconnect the connector CN17 for louver motor on the indoor PCB PCB Connector for Louver Motor CN17 Electrical Box ...

Page 197: ...ting Coin or Slotted Screwdriver Corner Position 1 2 3 4 2 4 5 Removing Fan Runner and Fan Motor 1 Remove the air intake grille according to the item 2 4 2 Removing Air Intake Grille 2 Drawing Electrical box a Disconnect the thermistors drain motor connector PCN6 and float switch connector from the PCB b Loosen screw of the wire clamp and remove the wire clamp c Remove three 3 screws fixing the el...

Page 198: ...ve the runner 3 Remove the earth wire for the fan motor Only for 4 and 5HP 4 Disconnect the fan motor connector 5 Remove three 3 nuts fixing the fan motor and remove the fan motor When reassembling the fan motor tightening torque of the nut for the fan motor is approximately 8N m TURN OFF all power source switches Phillips Screwdriver Tool Motor Nut 3 pcs Runner Bell Mouth Screw 3 pcs Cap Nut Flat...

Page 199: ... item 2 4 3 Removing Electrical Box Cover 3 Disconnect the all wiring connectors of the PCBs 4 Remove the PCBs by holding the expanded part of the holders using long nose pliers Phillips Screwdriver Long nose Plier Tool NOTE Do not touch electrical components on the PCBs If great force is applied to the PCB it will be faulty Holder Electrical Box PCB for Power Source PCB PCB Plier TURN OFF all pow...

Page 200: ... electronic expansion valve drain pump float switch and fan motor 3 Remove the fan runner and fan motor according to the item 2 4 5 Removing Fan Runner and Fan Motor 4 Drain the drain water by pulling the rubber plug Check clogging at the drain hole Do not use a cutter when removing the rubber plug If used the rubber plug will be damaged 5 Remove four 4 bolts for fixing the drain pan and remove th...

Page 201: ...ng to the item 2 4 8 Removing Drain Pan 2 Loosen the resin nut for fixing the float switch and remove the float switch Remove two 2 screws of fixing base for fixing the drain up mechanism when removing the drain up mechanism Phillips Screwdriver Tool NOTE Carefully handle the float switch Do not drop it on the floor If dropped malfunction may occur When mounting attach the float switch to the fixi...

Page 202: ...the drain pan according to the item 2 4 8 Removing Drain Pan 4 Remove the butyl sheet pull out the fixing plate for the thermistor from the gas pipe where the thermistor is located and then pull out the thermistor 5 Remove the butyl sheet pull out the fixing plate for the thermistor from the liquid pipe where the thermistor is located and then pull out the thermistor Fixing Plate of Thermistor The...

Page 203: ... hold the motor part when loosening the lock nut by spanner The base of the drive part may turn idle and be broken 6 Turn the lock nut by a few turn and the drive part is separated from the screw and can be removed 7 Prepare the new drive part for replacement service part with the position of the driver drive screw already adjusted NOTE During replacement work pay attention to the separation part ...

Page 204: ...ings for piping at the valve body the alteration of this direction do not affect the open close function of the valve Therefore the adjustment of the direction of the motor part is not required if the position of the motor is moved toward the rotating direction after replacement as shown below However pay attention to the direction of the motor for the coil of the electronic expansion valve not to...

Page 205: ... one 1 screw fixing the motor cover for the automatic louver motor 3 Draw out the louver shaft from the automatic louver motor and remove the automatic louver motor with fixing plate 4 Disconnect all the connectors connected to the motor Phillips Screwdriver Tool Screw Corner Cover Optional Air Panel Louver Shaft Connector Automatic Louver Motor Optional Air Panel Screw TURN OFF all power source s...

Page 206: ...m the air intake panel by supporting the louver side of the air intake grille and filter and unhooking it from the extrusion part 3 The air intake grille can be removed by releasing its chain lifting it upwards and then drawing it towards you 2 5 2 Removing Electrical Box Cover By opening the air intake grille the electrical box can be seen Loosen one 1 screw fixing the electrical box cover and re...

Page 207: ...ptional air panel Remove four 4 screws fixing the optional air panel 3 Remove the optional air panel after unhooking the hinge onto the hooks at the two positions near the drain pan Phillips Screwdriver Tool TURN OFF all power source switches Hinge Hook Connector for Louver Motor PCB CN4 CN7 PCN4 Optional Air Panel Screws Screw x 2 M6x30 Only for P G46 PCB2 Before Alteration Connector for Louver M...

Page 208: ...hes Phillips Screwdriver Tool 3 Removing Bell Mouth Remove the fixing plate after removing one 1 screw fixing the fixing plate on the support plate of the indoor unit For 4 0 and 5 0HP Remove the bell mouth by removing two 2 screws fixing the bell mouth onto the fixing plate for the drain pan of the indoor unit Q ty of Bell Mouth 1 RCD 1 0 to 3 0FSG1 2 RCD 4 0 to 5 0FSG1 Phillips Screwdriver Tool ...

Page 209: ...he fan runner a Disconnect the earth wire for the fan motor b Remove four 4 nuts fixing the fan motor and remove the fan motor When reassembling the required tightening torque for the cap nut is approximately 8N m 80kg cm Q ty of Fan Runner and Fan Motor Each 1 RCD 1 0 to 3 0FSG1 Each 2 RCD 4 0 to 5 0FSG1 TURN OFF all power source switches Nut Fan Motor Earth Runner Flat Washer Cap Nut ...

Page 210: ... the PCB holders holding PCB at four 4 positions by long nose plier 4 Remove three 3 fixing screws for the AC chopper Pay attention to squeezing when reassembling since the sealed earth wire and the transformer earth wire are commonly squeezed by one 1 screw TURN OFF all power source switches Phillips Screwdriver Long nose Plier Tool NOTE Do not touch electrical components on the PCBs If great for...

Page 211: ...removing two 2 fixing screws for the cover of the service access hole near the pipes inside the unit 4 Removing Float Switch Disconnect the connectors and remove the float switch after removing two 2 screw fixing the fixing plate for float switch onto the fixing plate for the drain up mechanism Phillips Screwdriver Tool TURN OFF all power source switches Service Access Cover Fixing Screws Connecto...

Page 212: ...drain pan according to the item 2 5 8 Removing Drain Pan 4 After disconnecting the wire connector remove two 2 fixing screws for the fixing plate for the drain up mechanism Firstly support the drain up mechanism by hand so as not to drop remove the hose band from the drain hose disconnect the drain hose and then remove the drain up mechanism TURN OFF all power source switches Phillips Screwdriver ...

Page 213: ...moving the rubber plug The sealing agent is used around the rubber plug However the rubber plug can be removed by pulling it out Do not scratch the rubber plug by a cutter etc Check to ensure that the water hole is not clogged by pricking with a pencil 5 Removing Drain Pan a Remove two 2 screws fixing the enforced plate onto the fixing plate for the drain pan Remove two 2 screws fixing the support...

Page 214: ...n according to the item 2 5 8 Removing Drain Pan 4 Remove the insulation for the pipe remove the thermistor holder from the gas piping and remove the thermistor for the gas pipe 5 Remove the butyl sheet remove the thermistor holder from the liquid piping and remove the thermistor for the liquid pipe TURN OFF all power source switches Phillips Screwdriver Tool Butyl Sheet Thermistor for Liquid Pipe...

Page 215: ... not hold the motor part when loosening the lock nut by spanner The base of the drive part may turn idle and be broken 6 Turn the lock nut by a few turn and the drive part is separated from the screw and can be removed 7 Prepare the new drive part for replacement service part with the position of the driver drive screw already adjusted NOTE During replacement work pay attention to the separation p...

Page 216: ...ings for piping at the valve body the alteration of this direction do not affect the open close function of the valve Therefore the adjustment of the direction of the motor part is not required if the position of the motor is moved toward the rotating direction after replacement as shown below However pay attention to the direction of the motor for the coil of the electronic expansion valve not to...

Page 217: ...ulation mounted with adhesive at the both sides of the C cover assembly Phillips Screwdriver Tool 3 Remove two 2 screws fixing the C cover assembly and remove the C cover assembly from the optional air panel Phillips Screwdriver Tool TURN OFF all power source switches C Cover Assembly Optional Air Panel Insulation Insulation C Cover Assembly Optional Air Panel Screws Motor Assembly ...

Page 218: ...d by pulling The motor assembly can be removed by removing the connector at the same time TURN OFF all power source switches Phillips Screwdriver Tool 5 Remove one 1 screw fixing the crank and cut the plastic tie fixing the motor cord Remove the motor after removing two fixing screws Phillips Screwdriver Tool Motor Assembly Connector Stopper Screws Screw Screws Motor Motor Assembly Crank Plastic T...

Page 219: ... portions right and left of the air intake grille as shown below TURN OFF all power source switches 2 Slowly pull the lower side of the air intake grille toward the front side 3 Lift up the air filter detach the hooks and draw the air filter downward Air Intake Grille Air Filter ...

Page 220: ...e front panel It may break the unit body 6 For attaching the front panel attach the front panel at the air outlet side firstly and attach three 3 catches at the upper part of the front panel 7 Open the front panel as the procedure 1 and fix the screw 1 piece at the center of the front panel 2 6 2 Removing Front Panel 1 Press the PUSH marks at both ends of the front panel and open the suction grill...

Page 221: ...nd check to ensure that there is no gap between the front panel and the unit body NOTE If the gap exists between the front panel and the air outlet it may cause air leakage and dewing may occur at the front panel and the dew may drop 9 After attaching the front panel tighten three 3 screws at the lower part of the air outlet and cover them with the bushes Stoppers No Gap ...

Page 222: ...our screws fixing the AS motor 4 Draw out the AS motor horizontally the AS motor is separated from the louver shaft 5 For attaching the AS motor insert the shaft of the AS motor into the D cut hole of the louver and perform the reverse procedures for removing AS motor TURN OFF all power source switches Phillips Screwdriver Tool AS Motor AS Motor Screws Connector white Connector black Connector whi...

Page 223: ...ting the thermistor for liquid pipe and remove the thermistor from the holder TURN OFF all power source switches 4 Removing Thermistor for Gas Pipe Remove the piping insulation protecting the thermistor for gas pipe by cutting the plastic tie and surrounding tapes and remove the thermistor from the holder Heat Exchanger Expansion Valve Thermistor for Liquid Pipe Thermistor Holder Lead Wire of Ther...

Page 224: ... of the air outlet TURN OFF all power source switches 6 Removing Thermistor for Suction Air Remove the thermistor for suction air by cutting the plastic tie fixing the thermistor onto the right side of the electrical box Vertical Louver Thermistor for Discharge Air Holder Hook 120mm Thermistor for Discharge Air Holder Vertical Louver Thermistor for Suction Air Plastic Tie 20mm ...

Page 225: ...ront side after removing two 2 screws fixing the electrical box 7 For attaching the electrical box set the electrical box connect the connectors and perform the reverse procedures for removing the electrical box 2 6 5 Removing Electrical Box Cover 1 Remove the front panel according to the item 2 6 2 Removing Front Panel 2 Remove one 1 screw for the electrical box cover 3 Remove the power source wi...

Page 226: ...e the connectors CN17 CN22 and CN11 from the low voltage PCB 4 Detach two 2 catches of the PCB base 1 fixing the low voltage PCB lift the low voltage PCB and remove other connectors still connected 5 Remove the earth wire from the heat exchanger detach one 1 catch of the PCB base 2 fixing the high voltage PCB lift the high voltage PCB and remove other connectors still connected Earth Wire Catch El...

Page 227: ...emoving Electrical Box Cover 3 Remove the drain pan from the unit by releasing the catches A and B from the left side of the drain pan and releasing the catch C by pulling the right side of the air panel toward the front side 4 For attaching the drain pan perform the reverse procedures for removing drain pan NOTE Check to ensure that the catches A B and C are snapped Heat Exchanger Release Catch A...

Page 228: ...g Heat Exchanger 1 Remove the front panel according to the item 2 6 2 Removing Front Panel 2 Remove the electrical box according to the item 2 6 5 Removing Electrical Box Cover 3 Remove the drain pan according to the item 2 6 7 Removing Drain Pan 4 Remove the piping stay at the rear side of the indoor unit Heat Exchanger Piping Stay Rear Side of Indoor Unit Screws Rear Piping of Heat Exchanger Scr...

Page 229: ...ng of the heat exchanger from the square hole by pulling the upper part of the heat exchanger forward and remove the heat exchanger 8 For attaching the heat exchanger perform the reverse procedures for removing NOTE After attaching the heat exchanger check to ensure that the hooks and the screws at the right and the left sides of the heat exchanger are correctly attached Release Catch Screw Unit b...

Page 230: ...f the supporting plate toward the inside and releasing the catches Phillips Screwdriver Tool 3 Remove the motor holders 1 and 2 fixing the fan motor For removing the motor holder insert the screwdriver at the catch part and screw it 4 After removing the motor holder 1 loosen one 1 screw fixing the motor shaft and the fan Push levers on both sides to release catches Bearing inside Supporting Plate ...

Page 231: ...Tool 6 For attaching the fan motor and the fan perform the reverse procedures for removing 7 Fix the fan at the position with 8mm clearance between the left end bearing side of the fan and the partition plate 8 Fix the fan motor with the outlet of the lead wire at the position as shown below Loosen Screw Fan Motor Lift up the fan and draw it leftward 60o Lead Wire of Motor Fan Motor Partition Plat...

Page 232: ...her spanner by turning the lock nut counterclockwise NOTE Do not hold the motor part when loosening the lock nut by spanner The base of the drive part may turn idle and be broken 6 Turn the lock nut by a few turn and the drive part is separated from the screw and can be removed 7 Prepare the new drive part for replacement service part with the position of the driver drive screw already adjusted NO...

Page 233: ...ation of this direction do not affect the open close function of the valve Therefore the adjustment of the direction of the motor part is not required if the position of the motor is moved toward the rotating direction after replacement as shown below However pay attention to the direction of the motor for the coil of the electronic expansion valve not to touch other pipings and the side plate of ...

Page 234: ...at both sides of the air intake grille towards the arrow mark direction the grille can be opened with an angle 30 3 Remove it from the hinged part 2 7 2 Removing Air Filter 1 The air filter is located at the inner side of the air intake grille Remove all the air intake grilles 2 Remove the air filter by pulling the knob of the air filter 2 7 Floor Type TURN OFF all power source switches Knob ...

Page 235: ... the top cover and sliding the discharge air grilles the grilles can be removed Phillips Screwdriver Tool 2 7 4 Removing Front Cover 1 Remove the air filter according to the item 2 7 2 Removing Air Filter 2 Remove the front cover from the slit after removing four fixing screws at the lower part and pulling it out downwards Top Cover Fixing Plate Discharge Air Grille Front Cover Screws ...

Page 236: ...2 Remove the air filter according to the item 2 7 2 Removing Air filter 3 Remove the front cover according to the item 2 7 4 Removing Front Cover 4 Remove the mounting plate for the fan motor after removing four fixing screws 5 Disconnect the wiring connector for the fan motor Remove the wiring assembly and connector Phillips Screwdriver Tool Screws Connector Wiring Assembly ...

Page 237: ...shing the catch part at four positions towards the inner side Hexagon Wrench Tool 7 Loosen the screw by a hexagon wrench Phillips Screwdriver Tool 8 Remove the fan motor by sliding it backwards after removing the fixing plate Pay attention not to drop it Catch Casing 1 Hexagonal Wrench To Loosen Motor Band Fixing Screw ...

Page 238: ...g Printed Circuit Board PCB 1 Remove the air intake grille according to the item 2 7 1 Removing Air Intake Grille 2 Remove the air filter according to the item 2 7 2 Removing Air Filter 3 Remove the front cover according to the item 2 7 4 Removing Front Cover 4 The side cover can be removed by removing the three 3 fixing screws and pulling it downwards Side Panel Screws Electrical Box Cover Screws...

Page 239: ... of the PCB TURN OFF all power source switches Phillips Screwdriver Long nose Pliers Tool NOTES 1 Do not touch electrical components Do not apply a large force to the PCB or it could result in damage 2 When reassembling check to ensure that each terminal is correctly connected by referring to the wire marks and terminal codes If incorrectly connected malfunction or damage of electrical parts will ...

Page 240: ...take Grille 2 Remove the air filter according to the item 2 7 2 Removing Air Filter 3 Remove the front cover according to the item 2 7 4 Removing Front Cover 4 Remove the side cover after removing three 3 fixing screws 5 Remove the piping cover after removing two 2 fixing screws for the partition plate and four 4 fixing screws for piping cover Partition Plate Piping Cover Screw Side Panel Screws ...

Page 241: ...loor Type TURN OFF all power source switches 6 Remove CORK TAPE and pull out the thermistor after removing the fixing plate for the thermistors Thermistor for Gas Pipe Cork Tape Liquid Pipe Thermistor Pipe Holder Thermistor ...

Page 242: ...er upper part of the inlet 2 Remove the air filter by pulling the center knob and bending the filter TURN OFF all power source switches 2 8 2 Removing Front Covers 1 Remove the air filter according to the item 2 8 1 Removing Air Filter 2 Remove the front lower cover after removing ten screws at the lower part of the front cover Air Filter Front Lower Cover ...

Page 243: ...5 Removing Fan Motor Phillips Screwdriver Pincers Tool 2 8 4 Removing Printed Circuit Board PCB 1 Remove the front covers according to the item 2 8 2 Removing Front Covers 2 Remove the PCBs as same as indicated in No 5 to No 7 of the item 2 7 6 Removing Printed Circuit Board PCB Phillips Screwdriver Tool 2 8 5 Removing Thermistors for Liquid Pipe and Gas Pipe 1 Remove the air filter according to t...

Page 244: ...2 Removing Side Cover 1 Open the air intake grille according to the item 2 9 1 Removing Air Filter and Air Intake Grille 2 Remove the screw fixing the side cover 3 Pull the side cover forward and unhook it from two 2 catches and metal plate hook 1 Slide the catches on both sides of the air intake grille backwards 2 Open the air intake grille downwards 3 To remove the air filter lift it upwards unh...

Page 245: ...arge air grille including the bearing and pull out the discharge air grille from the right side of the bearing 2 9 3 Removing Discharge Air Grille 1 Remove the side covers according to the item 2 9 2 Removing Side Cover 2 Remove the screw connecting the AS motor assembly and the discharge air grille and remove the stopper Screw Stopper Connector for AS Motor Discharge Air Grille Screw Bearing 2 1 ...

Page 246: ... wiring from the PCB 2 9 4 Removing Fan Motor 1 Open the air intake grille according to the item 2 9 1 Removing Air Filter and Air Intake Grille 2 Hook the electrical box on the lower frame after removing the screws fixing the electrical box NOTE During this work support the electrical box by hands not to drop it Electrical Box CAUTION PCN 202 Disconnect connector PCN 202 Ex After Alteration ...

Page 247: ...rds after removing the fixing band Pay attention not to drop it NOTE Pay attention to the position of the runner shaft when replacing the fan motor In case that the resistance is big when rotating the motor shaft by hand after replacing remove the bearing once according to the item 2 9 5 Removing Bearing adjust the positions of the runner shaft and the motor shaft on the straight and assemble the ...

Page 248: ...moving Fan Motor 4 Remove two 2 M8 bolts fixing the bearing and remove the bearing including the shaft and the runner assembly TURN OFF all power source switches 1 Open the air intake grille according to the item 2 9 2 Removing Side Cover 2 Remove the lower part of the casing according to the item 2 9 4 Removing Fan Motor and loosen two 2 screws for the coupling by a hexagon wrench 3 Remove two 2 ...

Page 249: ...he AS motor fixing plate Remove one screw B fixing the shaft of the motor for auto louver and pinion AS 2 9 8 Removing Thermistors for Liquid Pipe and Gas Pipe and Electronic Expansion Valve Coil 1 Open the air intake grille and remove the right and left side covers according to the items 2 9 1 Removing Air Filter and Air Intake Grille and 2 9 2 Removing Side Cover 2 Remove the drain hose from the...

Page 250: ...tronic Expansion Valve Coil 1 Remove the right side cover according to the item 2 9 2 Removing Side Cover 2 Remove the check cover from the side cover R 3 The electronic expansion valve can be seen through the checking hole 4 Check the activation of the electronic expansion valve by touching with a hand Partition Plate Thermistor for Gas Pipe Thermistor for Liquid Pipe Heat Exchanger Thermistor Ho...

Page 251: ...tem 2 9 1 Removing Air Filter and Air Intake Grille 2 Turn the electrical box according to No 4 of the item 2 9 4 Removing Fan Motor and hook the electrical box at the lower frame 3 Remove the cover after removing two 2 screws fixings electrical box cover NOTE During this work support the electrical box not to drop it NOTE Do not touch the electrical components Do not apply big force to the PCB If...

Page 252: ...Removing Electrical Parts 1 Remove screws for fixing for the electrical control box cover and remove the corresponded electrical parts 2 Open the service cover by pulling the handle Remove the total heat exchanger element or air filter Electrical Control Box Air Filter Damper Plate Air Supply Fan Service Cover Exhaust Fan Total Heat Exchange Element Total Heat Exchange Element Holder Suspension Br...

Page 253: ...wdriver Tool TURN OFF all power source switches 2 10 3 Removing Air Filter and Total Heat Exchanger Element 1 Open the service cover by pulling the hinge 2 Remove the air filter or total heat exchanger element Filters Heat Exchanger Hinge Maintenance Cover ...

Page 254: ...er Tool 2 10 4 Removing Fan Motor 1 Open the service cover by pulling the handle according to the item 2 10 3 Removing Air Filter and Total Heat Exchager Element 2 Remove the air filter according to the item 2 10 3 Removing Air Filter and Total Heat Exchanger Element 3 Remove the heat exchange element according to the item 2 10 3 Removing Air Filter and Total Heat Exchanger Element 4 Remove two 2 ...

Page 255: ... up the total heat exchanger element more than once two years 2 Use a vacuum cleaner to suck up the dust and dirt on the exposed surfaces of the total heat exchange elements Attach a nozzle with a brush to the vacuum cleaner for this job and clean the elements by passing the brush lightly over their exposed surfaces G Do NOT wash the element by water G Do not use the fard nozzle of the vacuum clea...

Page 256: ...Pan site requirements 6 Bucket 2 Nos for 5 liters 7 Phillips 1 No Screwdriver 8 Nipper 1 No 9 Adjustable 1 No Wrench 10 Megohm Tester 500V 11 Cleaning Agent Select a neutral type cleaning agent 12 Spray To spray cleaning water 13 Tape with To fix the vinyl sheet to protect Adhesive the room from cleaning water 14 Rope 1m 4 pieces 15 Vinyl Sheet Select a vinyl sheet with 0 5mm thickness 16 Gloves 1...

Page 257: ...bly according to the item 2 3 3 Removing Indoor Fan and Fan Motor 3 Removing Fan Fixing Plate Phillips Screwdriver Remove the screws fixing the fan fixing plate and then pull out the fan fixing plate downwards After removing the fan fixing plate cover the lead wire with a vinyl sheet to avoid cleaning water 4 Removing Dust Clogged Brush in Heat Exchanger Bucket or Paper Board Box Scratch and remov...

Page 258: ...arent board is also applicable instead of the vinyl sheet 6 Attaching Cleaning Water Pan Hang a cleaning water collector from the indoor unit 1 Attach ropes to the suspension brackets 2 Put the metal bars through the holes of the cleaning water collector 3 Attach the ropes to the four bars of the cleaning water collector and suspend the cleaning water collector 4 Attach the hose to the boss of the...

Page 259: ... drops of water left after cleaning the fins Screwdriver and reassemble the fan assembly and the drain pan Hexagon Wrench 10 Measure the condition of insulation of the drain pump with a megohm meter tester Check to ensure that the resistance is bigger than 1 MΩ at 500V 11 Connect the electrical wiring as it was and attach the removed parts Screwdriver 12 Neutralization Treatment after Cleaning The...

Page 260: ...ad a vinyl sheet over the floor to protect furnitures etc from cleaning water before this work No Procedure Tool 1 Remove the optional air panel according to the item 2 4 4 Phillips Screwdriver Removing Optional Air Panel 2 Remove the electrical box after opening the electrical box cover Phillips Screwdriver and disconnecting the connectors between the indoor and outdoor units and other connectors...

Page 261: ...the gap between vinyl sheets by using adhesive tape 3 Attach ropes to the each suspension bracket 4 Put the metal bars through the holes of the cleaning water collector 5 Attach the ropes to the four bars of the cleaning water collector and suspend the cleaning water collector as shown in the figure 6 Connect a hose to the boss and put end of hose in a bucket Cutter Knife Bucket Tool Cleaning Wate...

Page 262: ...or Operate the water pump and clean the dust on the heat exchanger After cleaning spray clean water to remove the cleaning water Adjust the pressure of the water pump so as not to damage the fins Clean Water Cleaning Agent Water Pump Cleaning Spray Tool NOTES 1 If the cleaning water remains fins will be corroded 2 Adjust the pressure of the pump at 2 5 to 5 0 kg cm2 so as not to damage fins Bucket...

Page 263: ...indoor unit 10 Check the insulation of the drain pump with a megohm meter Check to ensure that the insulation is greater than 1 MΩ when 500V is applied 11 Connect wiring as it was 12 Neutralization Treatment after Cleaning The cleaning agent specified in the item 2 11 1 is of the neutral type However the cleaning water after use may be not neutral Collect all cleaning water and make necessary neut...

Page 264: ... Fan Runner and Fan Motor 3 Removing Fixing Plate Protect the wiring from cleaning water during the cleaning after removing fixing plate for the fan TURN OFF all power source switches 4 Removing Dust on Heat Exchanger Remove dust on the fins at the inlet side of the heat exchanger by scratching off downwards Collect all dust in a bucket or carton box Phillips Screwdriver Tool Brush Bucket or Carto...

Page 265: ...o the cleaning water collector hole c Suspend the cleaning water collector with the rope from the indoor unit d Connect a hose to the boss for the cleaning water collector and put the other end in a bucket 7 Spraying Cleaning Water Spray the cleaning water over the fins of the heat exchanger Vinyl Sheet Tape Cutter Tool Cleaning Water Tool NOTES 1 It is recommended that gloves be used during this ...

Page 266: ...leaning The cleaning agent specified in the item 2 11 1 is of the neutral type However the cleaning water after use may be not neutral Collect all cleaning water and make necessary neutralization treatment for the cleaning water 8 Cleaning with Clean Water Insert the spray nozzle through the hole of the cleaning water collector Operate the pump and clean the fins with clean water Adjust the water ...

Page 267: ...move dust with a brush b Cover a vinyl sheet over the electrical components to protect them from splashed cleaning water c In the case that cleaning agent is used clean the heat exchanger with clean water completely d Adjust the pressure of the pump so as not to damage fins 7 Neutralization Treatment after Cleaning The cleaning agent specified in the item 2 11 1 is of the neutral type However the ...

Page 268: ... and 2 8 2 Removing Front Cover 2 Disconnect the drain hose from the field supplied pipe 3 Cover the rear side of the heat exchanger with a vinyl sheet after removing front side partition and drain pan After covering remount the front side partition and drain pan TURN OFF all power source switches 4 By lifting the drain hose and put the end in a bucket Vinyl Sheet Tape Cutter Tool Heat Exchanger F...

Page 269: ...ket or Carton Box Tool 6 Spray cleaning water over the fins of the heat exchanger 7 Cleaning with Clean Water Cover the wiring connectors with insulation tape Operate the pump and clean the heat exchanger with clean water completely Adjust the pressure of pump so as not to damage fins NOTES 1 If the cleaning water remains fins will be corroded 2 Adjust the pressure of the pump at 2 5 to 5 0 kg cm2...

Page 270: ...9 Check the insulation of the terminal board in the electrical box If the insulation is greater than 1MΩ by a 500 Megohm meter it is normal 10 Neutralization Treatment after Cleaning The cleaning agent specified in the item 2 11 1 is of the neutral type However the cleaning water after use may be not neutral Collect all cleaning water and make necessary neutralization treatment for the cleaning wa...

Page 271: ...d drain pan according to the item 2 9 8 Removing Thermistors for Liquid Pipe and Gas Pipe and Electronic Expansion Valve Coil 5 Remove the indoor fan motor and fan assembly according to the item 2 9 4 Removing Fan Motor 6 Remove the partition plate 2 after removing two fixing screws TURN OFF all power source switches Phillips Screwdriver Tool Phillips Screwdriver Tool Phillips Screwdriver Tool 7 R...

Page 272: ...ge fins NOTES 1 If the cleaning water remains fins will be corroded 2 Adjust the pressure of the pump at 2 5 to 5 0 kg cm2 so as not to damage fins Clean Water Pump Cleaning Water Tool Vinyl Sheet Tape Cutter Phillips Screwdriver Tool Spray Brush Tool 12 Check the insulation of the terminal board with a megohm meter Check to ensure that the insulation is greater than 1MΩ when 500V is applied 13 Ch...

Page 273: ...uivalent to half of the total refrigerant capacity Check the refrigerant quantity by measuring the weight 6 Close the liquid line stop valve on the cylinder gradually during the cooling operation 7 Fix the opening of the liquid line stop valve at a slightly opened position Continue the cooling operation 8 Finally close the liquid line stop valve and then gas line stop valve and stop the units at t...

Page 274: ......

Page 275: ...RAS 8FXG RAS 8FX3 RAS 10FXG RAS 10FX3 Conditions 1 Power Source Voltage AC380 415V 2 Non Loading Free Output 3 Ammeter Type Volt Meter X1 1 Excessive Low Voltage at a DC Voltage is Lower than 350V Excessive High Voltage at a DC Voltage is Higher than 750V 10 at Applicable Frequency Range 0 5Hz S 1Hz S 3Hz S 6Hz S 30Hz S 5 Steps Frequency 75Hz Space Vector PWM Control 75Hz Frequency 115Hz V F Contr...

Page 276: ... is measured by internal thermistor Control voltage decreases abnormally Overload Control Fin Temperature Increase Earth Detection Protection Function Transistor module or ISPM has four protection function for self protection Protection of Transistor Module The unit is stopped when the ISPM temperature is higher than 100o C Only for 24 and 30HP The unit is stopped when the compressor is earthing O...

Page 277: ...um Accuracy of Output Voltage Failure of Current Sensor Failure of Transistor Module Failure of ISPM Failure of Compressor Disconnected Wiring Stoppage at a current of compressor smaller than 0 5A When the frequency is 15 to 18Hz after starting Refer to the note in next page RAS 5FSG RAS 5FS3 RAS 8FSG RAS 8FS3 RAS 10FSG RAS 10FS3 RAS 16FSG RAS 16FS3 RAS 20FSG RAS 20FS3 Conditions 1 Power Source Vo...

Page 278: ... is measured by internal thermistor Control voltage decreases abnormally Overload Control Fin Temperature Increase Earth Detection Protection Function Transistor module or ISPM has four protection function for self protection Protection of Transistor Module The unit is stopped when the ISPM temperature is higher than 100o C Only for 24 and 30HP The unit is stopped when the compressor is earthing O...

Page 279: ...V U N B U V W 1 3 2 4 RAS 5 to 20FSG FS3 380 415 380V 50 60Hz 5HP Before Manufacturing U4MV0196 8 to 20HP Before Manufacturing U4NG1001 No Parts Model Name 1 Fin mm 200 X 255 X 50 2 Transistor Module PM25RSB120 IPM 3 Diode Module DF40AA160 DM 4 Diode Module RM201 1A 20F D ...

Page 280: ... 16 200 255 RAS 5 to 20FSG FS3 380 415 380V 50 60Hz 5HP After Manufacturing U4MV0197 8 to 20HP After Manufacturing U4NG1002 No Parts Model Name 1 Fin mm 200 X 255 X 50 2 Transistor Module 6MBP25RA120 05 IPM 3 Diode Module 6RI30G 160 DM ...

Page 281: ...3 7 MAIN PARTS U V W N P B 200 1 3 2 255 RAS 5 to 20FSG FS3 220V 60Hz No Parts Model Name 1 Fin mm 200 X 255 X 50 2 Transistor Module 7MBP50JB060 IPM 3 Diode Module 6RI50E 080 DM ...

Page 282: ...COM1 SUB1 MAIN1 COM2 R1 CN201 S1 RB N P P1 PD C RAS 24 and 30FSG1 FS5 380 415 380V 50 60Hz No Parts Model 1 AC Chopper FH9212P 2 ISPM HS15A3F12 1 2 RAS 24 and 30FSG1 FS5 220V 60Hz No Parts Model 1 ISPM 1 HS28A3F06 2 ISPM 2 HS06A3F06 ...

Page 283: ...speed depends on the outer setting Transmit Error 30sec Activation Recovery 10sec Protection Activation Output Main Circuit Power Source Frequency Instruction Output Voltage Soft Start Stop Frequency Failure Signal Activation of Protection Device Overload Signal Charged Indication Red LED5 on PCB5 or LED2 on PCB2 ...

Page 284: ...ted Instantaneous Overcurrent When the current detected by current sensor exceeds 105 of the rated current continuously for 30 seconds or for 3 5 minutes in total during a 10 minutes period overcurrent is detected Electric Thermal Relay b Function When abnormalities are detected the inverter compressor is stopped and transmit the signal code of stoppage cause to PCB1 c Cancellation of Protection F...

Page 285: ...se is transmitted to PCB1 c Cancellation of Protection Function Transmission for signal code of stoppage cause is canceled when a stopping order is issued or main power source is cut off 3 1 6 Overload Control a Level of Detection When the output current exceeds 105 of the maximum output current an abnormality is detected b Function An overload signal is issued when output current exceeds 105 of t...

Page 286: ...ons Rated Current of AC Chopper 2 1A 5 6A Applicable Power Source Output Voltage Output Current Maximum 2 1A 5 6A Control Method Chopping Frequency Input Duty Signal Accuracy of Output Voltage Output Characteristics Soft Start Overcurrent Protection Method Overcurrent Setting Minimum 2 1A 5 6A Overcurrent Protection Area 100kHz 5 Current 2 to 8mA 10 6 Input Duty 10 s Current Limiter Single Phase 2...

Page 287: ...l From Control PCB R S 1 3 PCN201 PCN202 PCN203 PCN204 5 1 3 CN201 1 3 5 1 3 5 1 3 C MFE AC220 240V From Control PCB Input Duty Signal From Control PCB R S R1 SUB1 MAIN1 1 3 CN201 C MFE NORMAL COM2 COM1 S1 E1 98 110 45 CAUTION CN201 PCN201 PCN203 PCN202 PCN204 R1 CN201 S1 COM1 COM2 SUB1MAIN1 CAUTION 180 69 124 b 5 6A For Outdoor Units and Indoor Units RPI 3 0 to 5 0HP Models ...

Page 288: ...he motor 1 are installed to the unit and rotated simultaneously 2 Louver 4 Stopper AS 1 Motor 3 Bearing AS 3 Bearing AS 4 Motor 0 zero Reset 1 Motor 2 Louver Steel Plate Stopper Press the AUTO LOUVER of the remote control switch during auto louver operation The AS stopper of the louver 2 touches the steel plate stopper and the louver is reset to the 0 position The power supply for the motor 1 is t...

Page 289: ...procating force gives the driving force to the louver 6 and rotates the louver 2 Auto Louver Stoppage Press the AUTO LOUVER of the remote control switch during auto louver operation The crank 2 touches the stopper of the fixing plate of motor 7 and the louver is reset to the 0 position The power supply for the motor 1 is turned OFF when the louver is at the setting position The louver 6 is stopped...

Page 290: ...he motor 1 rotates the rotating torque is transmitted to the louver 4 directly and the circular reciprocating force of the motor rotates the louver 2 Auto Louver Stoppage 1 AS Motor 2 Pinion 3 Rack 4 Bearing 5 Cover 6 Louver 1 AS Motor 2 Pinion 3 Rack 6 Louver Stopper 5 Cover 2 Louver 1 Motor Main Louver Sub Louver 0 zero Reset Press the AUTO LOUVER of the remote control switch during auto louver ...

Page 291: ...the inlet port at the outer frame of the fixed scroll 2 The gas inside of the compression space is compressed toward the center of the scroll 3 The compression space is minimum at the center of the scroll and the gas compressed at the maximum is discharged from the outlet port of at the center of the scroll 4 The above procedures Suction Compression Discharge is repeated continuously Fixed Scroll ...

Page 292: ...S3 10FS3 8FXG 10FXG 8FX3 and 10FX3 Inverter Compressor x 1 and Constant Speed Compressor x 1 RAS 16FSG and 16FS3 Inverter Compressor x 1 and Constant Speed Compressor x 2 RAS 20FSG 24FSG1 30FSG1 20FS3 24FS5 and 30FS5 Inverter Compressor x 1 and Constant Speed Compressor x 3 Seen from the front side of the unit the one compressor at the left is the inverter compressor and other compressor s is are ...

Page 293: ...0FXG RAS 10FX3 RAS 5FSG RAS 5FS3 RAS 16FSG RAS 16FS3 RAS 20FSG RAS 20FS3 Inverter Compressor Constant Speed Compressor Model Q ty 1 Q ty 1 Q ty 1 Q ty 1 Q ty 1 Q ty 1 Q ty 2 Q ty 1 Q ty 2 Q ty 3 Total 1 2 3 4 4 Without RAS 24FSG1 RAS 24FS5 RAS 30FSG1 RAS 30FS5 ...

Page 294: ... automatically and over 14o C thermostat is turned ON again Prevention from freezing onto the heat exchanger in COOL and DRY operation When the temperature of the heat exchanger is below 0oC thermostat is turned OFF automatically and over 14o C thermostat is turned ON again Prevention from freezing onto the heat exchanger in COOL and DRY operation 0 10 20 30 40 50 60 70 80 15 10 5 0 5 10 15 20 25 ...

Page 295: ...umulator decreasing compressor temperature G If the compressor upper part temperature increases exceeding 132o C even if an electronic expansion valve opens the compressor is stopped in order to protect the compressor In cooling operation the above function is also available 200 100 25 30 132 150 72 3 14 2 100 200 5 3 Resistance Value of Thermistor kΩ Temperature oC Resistance Characteristics of T...

Page 296: ...utdoor Unit in Heating Operation For Defrosting The characteristics for the thermistor is the same with the value of outdoor ambient temperature thermistor as shown in the figure below 0 10 20 30 40 50 60 70 80 15 10 5 0 5 10 15 20 25 30 35 40 45 50 55 60 82 61 46 35 27 20 5 16 12 5 10 8 5 3 3 6 2 5 90 Ambient Temperature o C Thermistor Resistance KΩ Thermistor Characteristics ...

Page 297: ... RAS 30FS5 RAS 8FXG RAS 8FX3 RAS 10FXG and RAS 10FX3 Type EKV 10 0USRT Series EKV 5 0USRT Series for FX MVB Refrigerant Used R22 or R407C Working Temperature Range 30o C to 65o C Operating Time of Coil less than 50 Mounting Direction Drive shaft in Vertical Direction within an Angle of 45o as Maximum Flow Direction Reversible Drive Method 4 Phase Pulse Motor Method Rated Voltage DC12V 1 8V Drive C...

Page 298: ...vation Procedure Phase 2φ 4φ 3φ 1φ 1 2 3 4 1 Specifications Items Specifications Type EDM Type Refrigerant Used R22 or R407C Working Temperature Range 30o C to 70o C With Coils Not Electrified Mounting Direction Drive shaft in Vertical Direction Motor Upside and 90o in Four Direction Flow Direction Reversible Rated Electricity Drive Method 4 Phase Pulse Motor Method Rated Voltage DC12V 1 2V Drive ...

Page 299: ...oling can be insufficient and parts composing the refrigeration cycle can be damaged For this reason if the output of the low pressure sensor indicates vacuum and the value is maintained 12 minutes or longer the compressor is stopped for the purpose of protection 5 0 5 0 371 0 1 1 0 3 5 35 Output Voltage DC V Pressure MPa kgf cm2G Heating Operation Proportional Control of Compressor Frequency with...

Page 300: ...or controlling the high pressure not to increase excessively during heating operation the gas by pass circuit and the air volume of the outdoor fan is controlled automatically 2 The gas by pass circuit which is composed of the solenoid valve and the capillary tube for flow adjustment control the high pressure not to increase excessively by leading the high pressure gas to the low pressure side Low...

Page 301: ...nals indicated with IN to the power supply side For RAS 5FSG 5FS3 20FSG FS3 Items Specifications Model HF4020C DV Rated Current AC415V 20A Permissible Temperature Range 20o C to 65o C Circuit Diagram L1 C1 C2 C3 C4 C5 C6 C7 C8 C9 L2 L3 L4 L5 L6 L7 L8 C10 C11 C12 C13 C14 C15 Z5 Z4 Z2 Z3 Z1 IN E N L1 L2 L3 OUT N L1 L2 L3 N L1 L2 L3 N L1 L2 L3 EMI FILTER TYPE RATING T V LOT No 120 100 250 260 270 93 ...

Page 302: ...O A D Z Z Z Cy2 Cy1 Cy1 Cy2 L L Cy1 4LFB 12822 2F 415VAC 22A Unit mm 118 0 3 118 0 3 Date Code 5 φ4 2 for RAS 5 to RAS 20FSG FS3 for RAS 24 and 30FSG1 FS5 Items Specifications Model 20PTT10 H Rated Current AC415V 20A Permissible Temperature Range 20o C to 85o C Circuit Diagram L L L L L L CY1 CY1 CY1 CY2 CY2 Cx Cx z L1 L2 L3 N E L1 L2 L3 N E L I N E L O A D Items Specifications Model 4LFB 12822 2F...

Page 303: ... the alternative current to the direct current for the inverter Specifications Items Specifications Models 400LGSN2700M Capacity of Static Electricity 2700µF Rated Voltage 400V Permissible Temperature Range 25o C to 95o C 75 70 76 2 140 φ84 Items Specifications Character 1mH 10 at 1kHz Rated Current 33A Direct Resistance 25 1mΩ 20 at 20o C Permissible Temperature Range 20o C to 60o C for RAS 5FSG ...

Page 304: ...Permissible Temperature Range 20o C to 65o C 66 2 74 2 86 2 60 0 5 47 5 2 MAX 80 56 2 74 2 86 2 60 0 5 37 5 2 MAX 70 for RAS 5 to 20FSG FS3 220V 60Hz for RAS 24 and 30FSG1 FS5 Items Specifications Character 0 5mH 10 at 1kHz Rated Current 30A Direct Resistance 15mΩ 20 at 20o C Permissible Temperature Range 20o C to 65o C ...

Page 305: ...n from a remote place by using level signal or ON OFF The basic wiring time chart are shown below NOTES 1 Picking up signal within 10 seconds after power supply is turned ON is not available due to initializing of components Do not change the signal RUN STOP in this period 2 Remote Control Switch is required for this function SS3 X1 Power Source Control Circuit Indoor Unit PCB CN4 X1 3P Connector ...

Page 306: ...rol Switch is required for this function 1 Indoor Unit PCB Set No 6 at ON side ON OFF 2 3 4 5 6 7 8 DSW2 ON X1 OFF X2 Power Source Control Circuit Indoor Unit PCB CN4 X1 X2 3P Connector 3 2 1 3 2 1 NOTES 1 When the unit is started by the remote ON OFF switch the fan speed is subject to the mode memorized in the remote control switch 2 The pulse width shall be wider than 200ms Wiring Diagram Exampl...

Page 307: ...wer source before setting the dip switch NOTES 1 Picking up signal within 10 seconds after power supply is turned ON is not available due to initializing of components Do not change the signal RUN STOP in this period 2 Remote Control Switch is required for this function OFF X1 Power Source Control Circuit Indoor Unit PCB CN4 X1 3P Connector 2 1 2 1 NOTE The pulse width shall be wider than 200ms Wi...

Page 308: ...s recommended that safety devices such as electric leakage breaker or smoke detector etc be used NOTES 1 Picking up signal within 10 seconds after power supply is turned ON is not available due to initializing of components Do not change the signal RUN STOP in this period 2 Remote Control Switch is required for this function Cut JP5 of indoor PCB JP1 JP2 JP3 JP4 JP5 JP6 RPK Cut JP2 of indoor PCB S...

Page 309: ...s automatic restarting in less than 2 seconds after a power failure The compressor starts in 2 seconds after a 3 minute time guard after power failure Turn OFF the power source before setting the dip switch 1 Indoor Unit PCB Set No 5 at ON side ON OFF 2 3 4 5 6 7 8 DSW2 NOTES The unit is started and stopped according to the power supply ON OFF due to the power failure When the power failure is occ...

Page 310: ...ial more than 1 5 degree Only for RPK After Alteration DC 12V 2 Do not use a thermostat utilizing mercury 3 This function can be used together with 4 1 1 Remote Control ON OFF Function Operation Cooling Operation Compressor is ON by closing terminals 2 and 3 at CN3 Compressor is OFF by opening terminals 2 and 3 at CN3 Heating Operation Compressor is ON by closing terminals 1 and 2 at CN3 Compresso...

Page 311: ...ermistor Refer to the item 4 4 5 17 2 During the heating operation Heating Temperature Calibration is automatically cancelled Refer to the item 4 4 5 1 4 1 6 Cooling or Heating Operation Mode Setting Change by External Input Level Signal Input By utilizing this function the cooling or heating operation mode can be changed by giving a contact signal from the outside to the unit The operation mode i...

Page 312: ...zed to pick up activation of safety devices However this function is not available under abnormal transmission conditions of the remote control switch Connect the wires as shown below The required parts are indicated in Table 4 3 Please note that the contact of auxiliary relay RYa is closed when one of the safety devices is activated Picking Up Alarm Signal JST XHP 3 Parts Name Specification Model...

Page 313: ... Signal during Heating Operation Except for RPK FSGM Series This function is utilized to pick up the heating Thermo ON signal of compressor running to control a circulator or a humidifier Connect wires as shown below The required parts are indicated in Table 4 3 The contact of RYa is closed when THERMOSTAT is ON during heating operation mode NOTE Thermo ON indicates that one of the micro computer ...

Page 314: ...ermo ON Signal during Cooling Operation Except for RPK FSGM Series This function is utilized to pick up the cooling Thermo ON signal of compressor running Connect the wires as shown below The required parts are indicated in Table 4 3 The contact of RYa is closed when THERMOSTAT is ON during cooling operation mode NOTE Thermo ON indicates that one of the micro computer control function THERMOSTAT i...

Page 315: ... input and output setting of indoor unit 3 Selection of Indoor Unit a At the input and output setting mode the indication on the remote control switch is changed as shown in the right figure The indication of 02 is turned ON The address of the indoor unit which the optional function is to be set is indicated at the segments for timer setting time indication and the ADDS is indicated below The refr...

Page 316: ...d output signal for the table below Indications and Input and Output Signals 1 2 Indication 2 Input Output 00 Not Set Not Set 01 Control by Field Supplied Room Thermostat Cooling Operation Signal 02 Control by Field Supplied Room Thermostat Heating Alarm Signal 03 Remote Control ON OFF Function 1 Cooling Operation Signal 04 Remote Control ON OFF Function 2 Operation Thermo ON Signal during Cooling...

Page 317: ...suction air of the indoor unit is applied for the activation of the protective devices in relation with the thermostat for the suction air of the indoor unit 2 In temperature control by the remote control thermistor when the detecting temperature is abnormal due to the failure of the remote control thermistor etc the thermistor to be used is changed to the thermistor for suction air of the indoor ...

Page 318: ...l Input to 2 and 3 of CN3 In case of using other functions change the contact setting according to the item 4 2 1 1 Remote Control 1 Level Signal Input This is an ON OFF function from a remote place by using level signal or ON OFF The basic wiring time chart are shown below In Case of Remote Control 1 Signal Input to 1 and 2 of CN3 NOTES 1 Picking up signal within 10 seconds after power supply is ...

Page 319: ...are shown below In Case of ON Signal Input to 2 and 3 of CN3 and OFF Signal Input to 1 and 2 of CN3 NOTES 1 Picking up signal within 10 seconds after power supply is turned ON is not available due to initializing of components Do not change the signal RUN STOP in this period 2 Remote Control Switch is required for this function 3 KPI series is applicable for A C VENTI Mode only ...

Page 320: ... of air conditioner the air conditioner remains unchanged The basic wiring and time chart are shown below In Case of Stoppage Signal Input to 1 and 2 of CN3 NOTES 1 Picking up signal within 10 seconds after power supply is turned ON is not available due to initializing of components Do not change the signal RUN STOP in this period 2 Remote Control Switch is required for this function ...

Page 321: ...ut to 2 and 3 of CN3 At this function the B contact can be used by the optional setting item 4 4 5 20 of the remote control switch The time chart when using the B contact is shown below Time Chart NOTES 1 Picking up signal within 10 seconds after power supply is turned ON is not available due to initializing of components Do not change the signal RUN STOP in this period 2 Remote Control Switch is ...

Page 322: ...the power failure When the power failure is occurred during operation the unit is started again automatically after the power supply is recovered Remote Control Switch is required for this function 4 2 5 Power Supply ON OFF 2 Restarting Function After Power Failure Set the optional function of the remote control switch as shown in the item 4 4 5 24 to restart the system automatically even if power...

Page 323: ... terminals 2 and 3 at CN3 Heating Operation Compressor is ON by closing terminals 1 and 2 at CN3 Compressor is OFF by opening terminals 1 and 2 at CN3 Table 4 5 Specifications on Required Components NOTES 1 When setting the dip switch DSW2 turn OFF power source and set the dip switch If the dip switch is set without turning OFF the power source it does not correctly function 2 When a field supplie...

Page 324: ...ion Heating Temperature Calibration is automatically cancelled Refer to the item 4 4 5 1 4 2 8 Cooling or Heating Operation Mode Setting Change by External Input Except for KPI Series By utilizing this function the cooling or heating operation mode can be changed by giving a contact signal from the outside to the unit The operation mode is followed by the field supplied switch or the remote contro...

Page 325: ...n of total heat exchanger 2 Remote control switch is needed to set this function 4 2 10 Picking Up Operation Signal By utilizing this function the cooling or heating operation mode can be changed by giving a contact signal from the outside to the unit The operation mode is followed by the field supplied switch or the remote control switch which is used last Required Parts for Modofication 1 Pickin...

Page 326: ... shown below In Case of Giving Heating Operation Signal to 1 and 3 of CN7 2 Picking Up Alarm Signal This signal is utilized to pick up activation of safety devices and is normally indicated on the remote control switch However this function is not available under abnormal transmission conditions Connect the wires as shown below Please note that the contact of auxiliary relay RYa is closed when one...

Page 327: ...ON during heating operation mode In Case of Giving Thermo ON Signal during Heating Operation to 1 and 2 of CN8 NOTE Thermo ON indicates that one of the micro computer control function THERMOSTAT is ON as a thermostat 5 Picking Up Cooling Operation Signal Except for KPI Series This function is utilized to pick up the cooling signal The contact of RYa is closed when cooling operation signal is ON de...

Page 328: ...r KPI Series This function is utilized to pick up the cooling Thermo ON signal of compressor running Connect the wires as shown below The contact of RYa is closed when THERMOSTAT is ON during cooling operation mode In Case of Giving Thermo ON Signal during Cooling Operation to 1 and 3 of CN7 NOTES 1 Thermo ON indicates that one of the micro computer control function THERMOSTAT is ON as a thermosta...

Page 329: ... the outdoor unit is being supplied By setting function selection mode is available and the following appears on the 7 segment display This display indicates that the function No 1 Fixed Heating Mode is set at input 1 SEG2 Input Output Terminal SEG1 Function No Function No Input Output 1 Fixing Heating Mode Operation Signal 2 Fixing Cooling Mode Alarm Signal 3 Demand Compressor ON Signal 4 Snow Se...

Page 330: ... selected contents are memorized in the outdoor unit printed circuit board and the function selection mode is stopped The memorized data is maintained even power source lines are disconnected The connecting details of each function are described below and the required parts are also indicated below PSW2 Indication for Input 1 PSW3 PSW3 PSW2 PSW2 PSW2 PSW2 PSW3 PSW3 PSW3 Indication for Input 2 Indi...

Page 331: ... available The following indicates an example for Demand at input 3 between 1 and 2 pins of CN18 4 3 2 Forced Stoppage The compressor is stopped and the indoor fan motor is stopped when the forced stoppage input terminals CN18 1 to 2 on the outdoor unit PCB is short circuited during running However the remote control switch display remains at the same mode with the stoppage code No 10 In this case...

Page 332: ...ndition during this mode and an alarm code of 20 appears Wiring Diagram Example of Fixing Operation Mode Outdoor Unit 4 3 3 Demand Current Control Only for 24 and 30HP In the case that the demand input terminals on the outdoor unit PCB are short circuited the compressor frequency is controlled that the maximum limit of the outdoor running current is set 80 70 and 60 The maximum limit of the outdoo...

Page 333: ...he wire to the terminals as short as possible 2 Do not run the wires along high voltage cable crossing is applicable If necessary to run wires along high voltage cable insert the low voltage cable s into metal tube and ground it at one end If sealed wires are used at the low voltage wire side ground it at one end of shield wires The maximum length should be 70m Specifications Remarks Auxiliary Rel...

Page 334: ...8 7 10 10 5 15 15 4 Defrosting Operation Stop Area Defrosting Operation Start Area Outdoor Temp Outdoor Evaporating Temperature Pipe 5 6 10 15 10 5 0 15 7 10 10 5 15 15 4 Defrosting Operation Stop Area Defrosting Operation Start Area Outdoor Temp Outdoor Evaporating Temperature Pipe 5 6 10 15 Dip Switch Setting Temperature Conditions under Defrosting Operation Standard Specifications Cold Area Spe...

Page 335: ...ch NOTE The operation may be OFF due to high outdoor temperature protection control since protection control is not cancelled 4 3 9 All Season Cooling Operation By setting the dip switch the cooling operation through the year is available The cooling operation is continued under a low temperature 1 No 4 of DSW5 is set at OFF before shipment 2 Turn OFF the main switch and set the dip switch NOTE Th...

Page 336: ... outdoor temperature 2 Frequency Range Converted Frequency of Constant Speed Compressor NOTE The maximum frequency for the 8 to 30HP outdoor unit is indicated as Inverter Frequency Converted Frequency of Constant Speed Compressor Outdoor Unit Capacity HP Minimum Frequency Maximum Frequency When 5 95Hz Except for the Conditions Below Night Shift 8 165Hz is not Set 10 177Hz 16 255Hz 20 325Hz 24 385H...

Page 337: ...ble 4 7 Connecting relay contactors RYa are closed at the time of alarm When either one of the units issues an alarm an alarm signal is indicated 2 Picking Up Operation Signal With this procedure the operation signal of cooling or heating can be picked up The method for picking up the signal is explained in the figure below The required part is the same as in Table 4 7 Connecting relay contactors ...

Page 338: ...losed at the time of compressor running This signal can be applied to the check of signals at the time of remote controlling and to the fan interlock of outdoor fresh air 4 Picking Up Defrosting Signal With this procedure the defrosting signal can be picked up The method is explained in the figure below The required part is the same as in Table 4 7 Connecting relay contactors are closed at the tim...

Page 339: ...tor Fan Speed Indicator Ventilation Indicator Operation Mode Indicator Automatic Cooling Heating Operation Indicator Run indicator Red Lump Operation Switch Section Run Stop Switch MODE Operation Mode Selection Switch FAN SPEED Fan Speed Selection Switch Up Down Panel Operation Switch This function is not available LOUVER Swing Louver Operation Switch VENTI Ventilator Operation Switch TIME Time Se...

Page 340: ...aneous Indoor Units Operation in Same Refrigerant Piping System Main Switch PC P1H Main Indoor Unit No 1 Indoor Unit Outdoor Unit Refrigerant System 1 Main Indoor Unit No 1 Indoor Unit Main Indoor Unit No 1 Indoor Unit Control Cable H LINK Outdoor Unit Refrigerant System 2 Outdoor Unit Refrigerant System 3 Simultaneous Indoor Units Operation in Plural Refrigerant Piping Systems Main Switch PC P1H ...

Page 341: ...g polarity and order d Ending of Test Running Mode 5 When the confirmation of the number of connected units and the wiring checking are finished end the test running mode by depressing the RESET switch 2 Connected unit control wires should not be installed parallel to 200 400V power cables Fix them by utilizing bands It is recommended that cables be installed at least 30cm away from power cables o...

Page 342: ...ress the CHECK switch and the RESET switch simultaneously for more than 3 seconds the main remote control switch is changed to the field setting mode and the sub remote control switch is changed to the check mode Liquid Crystal Display JP01 Altering Method to Sub Control Switch Cut Jumper Wire JP01 with Nipper CN12 Yellow CN13 Blue No 0 Unit CN12 Yellow CN13 Blue No 0 Unit CN12 Yellow CN13 Blue No...

Page 343: ...ration with One Remote Control Switch Simultaneous Indoor Units Operation in Plural Refrigerant Piping Systems Connector Cable Between Units Main Switch Remote Control Switch Main Indoor Unit No 1 Indoor Unit Outdoor Unit Refrigerant System 1 Main Indoor Unit No 1 Indoor Unit Main Indoor Unit No 1 Indoor Unit Control Cable H LINK Outdoor Unit Refrigerant System 2 Outdoor Unit Refrigerant System 3 ...

Page 344: ...s indicated at the segments for time setting time indication and the ADDS is indicated below The refrigerant cycle number of the indoor unit for which the optional function is to be set is indicated at the segments for timer setting time indication and the RN is indicated below The indication of the setting temperature is turned OFF b At the condition of the above item a press the TEMP switch or t...

Page 345: ...mode is returned to the normal condition G Setting Items of Optional Functions 3 When pressing the TIME switch When pressing the TIME switch 00 01 b1 b2 b3 b4 E4 E5 F1 No Items Optional Functions Individual Setting Setting Condition Contents 00 Not Available 01 Available 00 Not Available 01 Available 00 Not Available 01 Available 00 Standard 01 100 hours 02 1 200 hours 03 2 500 hours 04 No Indicat...

Page 346: ...rage Value of Indoor Suction Thermistor and Thermistor of Remote Control Switch 18 C9 Not Prepared 19 CA Not Prepared 00 Forced Stoppage Input A Contact 01 Forced Stoppage Input B Contact 21 CC Not Prepared 00 Not Available 01 Available 23 d2 Not Prepared 00 Not Available 01 Available 00 Automatic Ventilation 01 Ventilation by Total Heat Exchanger 02 Bypass Ventilation No Total Heat Exchanging 00 ...

Page 347: ...as thermo ON In this case air movement in the room will be kept on the same level as thermo ON ensuring a homogenous air distribution In the case that an Auto Louver is equipped this operation will be also held on when the heating is turned thermo OFF NOTE Perceptions of coolness heat and air flow are subject to personal tastes and behaviors It is therefore recommended to discuss this with custome...

Page 348: ...it is valid As for FXG FX3 series cooling and heating operation mode can be changed individually for each indoor unit in same refrigerant cycle 9 Fixing of Fan Speed This function is utilized to fix the fan speed When this function is valid the fan speed is not changed by the remote control switch 10 Not Prepared 11 Not Prepared 12 Not Prepared 13 Drain Pump in Heating When the humidifier is insta...

Page 349: ...e by the remote control switch operation the unit is started again automatically after the power supply is recovered 23 Not Prepared 24 Power Supply ON OFF 2 Restarting Function After Power Failure for the models of RPI 0 8 to 5 0FSG1 RCI FSG2 RCD FSG1 and RPC FSG1 After Alteration In case of other models refer to the item 4 1 3 This function is utilized to start the unit operation again automatic...

Page 350: ...of the total heat exchanger operation The setting condition and the delaying period of operation start up are as shown below 29 Not Prepared 30 Automatic OFF Timer Setting This function is utilized to set the OFF timer function automatically when the unit is started by the remote control switch During operation with the automatic OFF timer setting function the cancellation of the OFF timer and the...

Page 351: ...the ADDS is indicated below the address indication The refrigerant cycle number of the indoor unit is indicated at the segments for timer setting time indication and the RN is indicated below the refrigerant cycle indication The indication of the setting temperature is turned OFF c Indication of Model Code The indication of the model code is shown in the right figure The model code of the outdoor ...

Page 352: ...4 48 OPTIONAL FUNCTION 4 5 Wireless Remote Control Switch 4 5 Wireless Remote Control Switch PC LH3 4 5 1 Name of Part Wireless Remote Control Switch PC LH3 Option ...

Page 353: ...usly more than 3 seconds When b is indicated on the liquid crystal display of the wireless remote control switch the unit is identified Press the switch and the switch simultaneously more than 3 seconds again When A is indicated on the liquid crystal display of the wireless remote control switch the identification of the unit is canceled d Set the rotary switch RSW on the indoor PCB of the indoor ...

Page 354: ...5 Optional Function Setting of the table for the dip switch setting procedures 2 Perform wiring between indoor units by referring to the receiver kit installation manual Turn OFF all the power sources before wiring and setting the dip switches 1 Installation of Air Panel for Wireless Control In case of simultaneous operation of plural up to 16 units by the wireless remote control switch apply the ...

Page 355: ...of unit number field supplied to the indoor units when setting the rotary switches RSW for each indoor unit 01 2 3 4 5 6 7 8 9 A B C E F D Rotary Switch Setting Rotary Switch Setting No 0 Unit No 1 Unit No 2 Unit No 3 Unit No 4 Unit No 5 Unit No 6 Unit No 7 Unit No 8 Unit No 9 Unit No 10 Unit No 11 Unit No 12 Unit No 13 Unit No 14 Unit No 15 Unit Setting Position Set by inserting slotted screwdriv...

Page 356: ... OFF the power source of the unit before performing the emergency operation a Open the cover of the receiver part or the grille of panel b Set the switch to the COOL or HEAT position c Set the switch emergency operation switch to the EMERGENCY position d Close the cover of the receiver part and turn ON the power source of the unit e The unit is operated Operating Condition 1 2 2 2 In Case of PC RL...

Page 357: ...Identifying of Indoor Units Installed Side By Side Setting of Main and Sub Receiver Part Muffling Buzzer Sound a Open the cover of the receiver part or the grille of panel Refer to the receiver kit installed in the indoor unit for the actual shape and the layout of the switches Turn OFF all the power sources before setting the dip switches 1 2 3 4 5 6 1 1 2 3 4 5 6 7 8 Standard 100 hours 1 200 hou...

Page 358: ...of Heating Temperature Calibration Refer to 4 4 5 1 for the details 3 Circulator Function at Heating Thermo OFF Refer to 4 4 5 2 for the details 4 Identifying of Indoor Units Installed Side By Side Refer to the item 4 5 2 Identifying of Indoor Units Installed Side By Side 5 Setting of Main and Sub Control Switch Refer to the item 4 5 3 Simultaneous Operation In Case of PC RLH8 9 10 11 The followin...

Page 359: ...ch of Holiday Change Switch of Setting Pattern Setting Switch of Present Time Setting Switch of Day of A Week Setting Switch of Running Day Change Switch of Setting Indication of Pattern Setting Indication of ON OFF Setting Time Setting 1 Setting 2 and Setting 3 From Above Setting Switch of ON OFF Time OK Switch Cancel Switch of Setting Time Change Switch of ON OFF Setting Operation Switch Section...

Page 360: ...indications for reference The actual display during operation is different Indication of Group Number Indication of Louver Angle Indication of Timer Indication of Demand Control Indication of Emergency Stop Indication of NO FUNCTION Indication of Each Group Operation Indication of Setting Temperature Indication of Alarm Code Indication of Remote Control Switch Not Available ALARM Indicator FILTER ...

Page 361: ...harge side This insufficient refrigerant charge resulted in discharge gas overheating and oil deterioration finally due to separated operation despite 08 alarm Countermeasure 1 The compressor was replaced with a new one 2 Correct refrigerant amount was charged according to refrigerant piping length and connected indoor units Remarks Additional Refrigerant Charging Open the liquid stop valve slight...

Page 362: ...nce When A Long Piping Is Applied Phenomenon Sufficient cooling was not available for an indoor unit which located at the farthest position Cause In the case that an outdoor unit is located 20 meters lower than indoor units resetting of the dip switch DSW3 is required However no setting was performed Therefore the target discharge pressure was not increased resulting in insufficient cooling perfor...

Page 363: ...stalled without ducts of inlet side and outlet side Due to almost no external static pressure abnormally big air volume was supplied resulting in higher air speed through the heat exchanger Countermeasure In order to reduce air flow a plate as a damper at the discharge side was added Another solution is at inlet side and outlet side Remarks Please note that running current is increased when no ext...

Page 364: ...ent total indoor unit capacity setting in the same refrigerant cycle Countermeasure All the main power switches for the indoor units were always ON Question and Answer for Field Work Example 4 Alarm Code 31 Phenomenon Alarm code 31 sometimes occurred and the system was stopped Cause Combination of the indoor and outdoor unit was as follows 5 4 Alarm Code 31 ON ON ON ON OFF ON O U I U I U I U I U ...

Page 365: ... this case though the outdoor temperature was 35 C the actual suction air temperature was nearly 50 C and Protection System from Excessively High Suction Pressure was activated the frequency of the compressor was decreased and the cooling capacity was also decreased accordingly As the outdoor units in line were installed back to back with a distance of 600mm between each outdoor unit s back the ho...

Page 366: ...essively big and the heat load when cooling and heating is excessively big during simultaneous COOL HEAT operation b where the heat load change of a room is big and thermo ON OFF may occur frequently especially during simultaneous COOL HEAT operation c where temporary capacity decrease according to ON OFF operation of other rooms is not allowed d where starting up in simultaneous COOL HEAT operati...

Page 367: ...air conditioning systems be selected a There is a room where the heat load change is big and ON OFF operation of indoor unit is excessively frequent b where capacity decrease for a short time according to ON OFF operation of other rooms is not allowed However this system can be applied to a room where gradual heat load change is given such as a heating operation in the morning cooling operation du...

Page 368: ...se a reducer 4 Start Up in Simultaneous COOL HEAT Operation Mode Phenomenon In case of starting up in the simultaneous COOL HEAT operation mode when the outdoor temperature is low the capacity increase time of the unit operation is longer in comparison with the only cooling or heating operation mode especially in starting up of small capacity operation 1HP cooling and 1HP heating Example Counterme...

Page 369: ...ntermeasure Do not use CH units individually for each indoor units in a same room In such a case connect the indoor units in a same room to one CH unit and operate indoor units in the same operation mode if it is possible 2 Fan Operation When Changing Cooling Heating Operation Mode Phenomenon In the case that room temperature rapidly increases during this automatic COOL HEAT operation the operatio...

Page 370: ...it and each indoor unit is within 30m The maximum lift among indoor units is within 15m The maximum lift between the outdoor unit and the indoor unit is within 50m In the case that the position of the outdoor unit is higher than that of the indoor unit 40m In the case that the position of the outdoor unit is lower than that of the indoor unit 1 2 3 L Max 100m Actual Max 125m Equivalent Indoor Unit...

Page 371: ...for above Example 3 Vertical Common Pipe VP30 for above Example Drain Piping Inner Diameter mm Slope 1 100 VP20 20 27 VP25 25 50 VP30 31 88 VP40 40 175 VP50 51 334 VP20 VP25 VP30 VP40 VP50 VP65 VP75 Table A Permissible Drain Flow Volume of Horizontal Vinyl Pipe Table B Permissible Drain Flow Volume of Vertical Vinyl Pipe JIS Symbol JIS Symbol NOTE NOTE Applicable to Common Pipe Not Applicable to C...

Page 372: ...kage According to KHK Standards The facility shall be arranged as follows referring to the KHK standards so that the refrigerant concentration will be below 0 3 kg m3 a Provide a shutterless opening which will allow fresh air to circulate into the room b Provide a doorless opening of 0 15 or more size to the floor area c Provide a ventilator linked with a gas leak detector of 0 4 m3 min or more ve...

Page 373: ...ollow them Example British Standard BS4434 1989 R22 Commercial Office Building Class D Occupancy MR C V MR Maximum Charge or Leakage of Refrigerant kg C Maximum Allowable Concentration 0 17 kg m3 V Volume of Space m3 Example 2 4 4 5 5 5 5 3 3 20HP 18HP Height 2 5m System A Refrigerant 60kg System B Refrigerant 50kg System A Outdoor Unit System B Outdoor Unit Floor 40m2 Floor 70m2 Floor 70m2 Floor ...

Page 374: ... and phase balance Inspect for faulty contact caused by loosened terminal connections oxidized contacts foreign matter and other items Inspect for electrical insulation resistance f Control and Protective Devices Setting Do not readjust the setting in the field unless the setting is maintained at a point other than the point listed in 11 SAFETY AND CONTROL DEVICE SETTING of TCII 2 For Indoor Unit ...

Page 375: ...TE2 Outdoor Temperature To Compressor Running Current A1 A2 A3 A4 Indoor Unit Unit No Expansion Valve Opening iE Heat Exchanger Liquid Temp TL Heat Exchanger Gas Temp TG Intake Air Temp Ti Outlet Air Temp To Capacity 1 8HP CA Indoor Unit Stoppage Cause Code d1 Restricted Control for Prevention of Compression Ratio Decrease c11 Restricted Control for Prevention of High Pressure Increase c13 Restric...

Page 376: ...p Top Temp bA 98 C Micro Computer State Indication I U Micro Computer C1 O U Micro Computer C2 D Stopping Cause State Indication Stopping Cause State Indication d1 E Alarm Occurrence Times of Abnormality E1 Times of Power Failure E2 Times of Abnormal Transmitting E3 Times of Inverter Tripping E4 F Automatic Louver State Louver Sensor State F1 H Pressure Frequency State Indication Discharge Pressur...

Page 377: ...T GOOD 17 Check for leakage at check valve ditto GOOD or NOT GOOD 18 Check for leakage at accumulator ditto GOOD or NOT GOOD 19 Check for leakage at strainer ditto GOOD or NOT GOOD 20 Check for leakage at electronic Ex Valve ditto GOOD or NOT GOOD 21 Check for leakage at piping ditto GOOD or NOT GOOD 22 Check direction of fans by Viewing or Air Flow Volume GOOD or NOT GOOD 23 Voltage among each Ph...

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Page 380: ...Catalog No 5413553 2003 Printed in Japan N Specifications in this catalog are subject to change without notice in order that HITACHI may bring the latest innovations to their customers ...

Page 381: ...V 1 2 B Micro Computer Control Expansion Valve NF 1 10 Noise Filter OH 1 Oil Heater for Oil Separator PCB 1 3 Printed Circuit Board Pd Ps Sensor for Refrigerant Pressure PSH Pressure Switch for Protection PSW1 3 Push Switch on PCB1 R 1 2 Resistor RS 1 2 Resistor for Starting RVR 1 2 Reversing Valve Relay SVA Solenoid Valve for Hot Gas Bypass TB 1 2 Terminal Board TF Transformer THM 7 10 Thermistor...

Page 382: ...l Box of CH Unit Printed Circuit Board 0DUN 1DPH 5HPDUN PCB 1 2 3 Printed Circuit Board TB 1 Terminal Board Power Supply TB 2 Terminal Board Operation Line TF 1 Transformer EF 1 Fuse 1 A NF 1 Noise Filter SVD1 SVS1 Solenoid Valve DC220 240V SVD2 SVS2 Solenoid Valve AC220 240V 1RWH OO WKH ILHOG ZLULQJ DQG HTXLSPHQW PXVW FRPSO ZLWK QDWLRQDO DQG ORFDO FRGHV Outdoor Unit or the other Changeover Unit I...

Page 383: ...3 Reversing Valve 22 Stop Valve 3 4 for Gas High Line 5 Accumulator 14 Capillary Tube 23 High Pressure Switch for Protection 6 Strainer 3 8 15 Check Valve 3 8 24 Sensor for Refrigerant Pressure 7 Strainer 1 2 16 Check Valve 5 8 25 Sigh Glass FXG Only 8 Strainer 3 4 17 Check Valve 3 4 26 Dryer FXG only 9 Strainer 18 Solenoid Valve Gas Bypass 27 E 102XME Refrigerant R407 FXG Airtight Test Pressure 3...

Page 384: ...o Indoor Unit To Outoor Unit High Pressure Gas Line 12 7mm Low Pressure Gas Line 15 88mm High Pressure Gas Line 15 88mm Low Pressure Liquid Line 9 53mm Ô Õ Refrigerant Flow Direction Cooling Operation Refrigerant Flow Direction Heating Operation Field Refrigerant Piping Flare Connection Liquid Line To Indoor Unit To Outoor Unit High Pressure Gas Line Low Pressure Gas Line High Pressure Gas Line Lo...

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