Toshiba ras-m07g3dv-e Service Manual Download Page 31

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7. Intermittent Operation Control for Indoor Fans of the Indoor Unit at Thermo-off Side in

Heating Operation

While heating operation is executed in two rooms, if room temperature reached the setup temperature in one

room and thermo-off occurred, the following operations start. (Refer to the figure below.)
1. The indoor unit of the room (A room) in which thermo-off did not occur starts a continuous operation with the

setup number of revolution.

2. The indoor unit of the room (B room) in which thermo-off occurred starts intermittent operation of the indoor fan.

The indoor fan operates with number of revolution of LL. Fan-ON time is 2 minutes and Fan-OFF time is 2 to 4

minutes.

While heating operation is executed in two rooms, if room temperature reached the setup temperature in both

room had thermo-off occurred, both indoor units start intermittent operation of the indoor fan.

T off time

To < 5°C

2 min.

≤

To < 10

3 min.

≤

4 min.

Indoor fan: Operates with setup number of revolution

0 rpm

B room thermo-OFF

B room thermo-ON

A room

Thermo-ON continues

B room thermo-ON

Thermo-OFF

Thermo-ON

0 rpm

T on

Operated with setup number

of revolution

Fan stop

T off

T on=2 min.

Operated with UL or SUL

Summary of Contents for ras-m07g3dv-e

Page 1: ...ULTI SPLIT TYPE Indoor unit RAS M07G3DV E RAS M10G3DV E RAS M13G3DV E RAS M16G3DV E RAS M07G3DV ND RAS M10G3DV ND RAS M13G3DV ND RAS M16G3DV ND RAS M07G3DV TR RAS M10G3DV TR RAS M13G3DV TR RAS M16G3DV TR FILE NO A10 1413 Revision 1 Mar 2015 ...

Page 2: ... DIAGRAM 15 6 SPECIFICATIONS OF ELECTRICAL PARTS 16 7 REFRIGERANT CYCLE DIAGRAM 17 8 CONTROL BLOCK DIAGRAM 18 9 OPERATION DESCRIPTION 19 10 OWNER S MANUAL and INSTALLATION MANUAL EXCERPT 44 11 HOW TO DIAGNOSE THE TROUBLE 61 12 HOW TO REPLACE THE MAIN PARTS 75 13 EXPLODED VIEWS AND PARTS LIST 85 14 Appendix 88 ...

Page 3: ...410A air conditioner circuit To prevent mixing of refrigerant or refrigerating machine oil the sizes of connecting sections of charging port on main unit and installation tools are different from those used for the conventional refrigerant units Accordingly special tools are required for the new refrigerant R410A units For connecting pipes use new and clean piping materials with high pressure fitt...

Page 4: ...igerant the gas pressure in the refrigeration circuit will become abnormally high and it may result in the pipe bursting and possible personnel injuries In the event that the refrigerant gas leaks out of the pipe during the service work and the installation work immediately let fresh air into the room If the refrigerant gas is heated such as by fire generation of poisonous gas may result WARNING D...

Page 5: ...to the refrigerant cycle otherwise fire of the welder may catch the inflammable Once the repair work has been completed check for refrigerant leaks and check the insulation resistance and water drainage If check is not executed a fire electric shock injury or water leakage may be caused Install the access port ceiling opening at least 2 5 m above the floor level and attach the grille locally procu...

Page 6: ... 590 600 L 430 430 440 510 490 490 560 L 380 380 385 450 Sound pressure level dBA 3 Cooling HH 33 34 35 36 33 34 35 36 35 36 37 38 33 34 35 36 H 31 32 33 34 31 32 33 34 32 33 34 35 31 31 32 33 H 29 30 31 32 29 30 31 32 29 30 31 32 27 27 29 31 L 27 28 29 30 27 28 29 30 27 28 29 30 24 25 26 29 L 25 26 27 28 25 26 27 28 25 26 27 28 22 23 24 25 Heating HH 33 34 35 36 33 34 35 36 35 36 37 38 33 34 35 3...

Page 7: ...pressure in the refrigeration cycle may become abnormally high so that a rupture or personal injury may be caused 5 After completion of installation work check to make sure that there is no refrigeration gas leakage If the refrigerant gas leaks into the room coming into contact with fire in the fan driven heater space heater etc a poisonous gas may occur 6 When an air conditioning system charged w...

Page 8: ...re that water or dust does not enter the pipe interior that no other oil than lubricating oils used in the installed air water heat pump is used and that refrigerant does not leak When using lubricating oils in the piping processing use such lubricating oils whose water content has been removed When stored be sure to seal the container with an airtight cap or any other cover 1 Flare processing pro...

Page 9: ...for R410A clutch type Conventional flare tool Clutch type Wing nut type 1 4 6 35 0 8 0 to 0 5 1 0 to 1 5 1 5 to 2 0 3 8 9 52 0 8 0 to 0 5 1 0 to 1 5 1 5 to 2 0 1 2 12 70 0 8 0 to 0 5 1 0 to 1 5 2 0 to 2 5 5 8 15 88 1 0 0 to 0 5 1 0 to 1 5 2 0 to 2 5 Nominal diameter Outer diameter mm Thickness mm A mm Flare tool for R22 clutch type Conventional flare tool Clutch type Wing nut type 1 4 6 35 0 8 0 t...

Page 10: ...o the flare surface be sure to use oil designated by the manufacturer If any other oil is used the lubricating oils may deteriorate and cause the compressor to burn out Table 3 2 7 Tightening torque of flare for R410A Reference values Nominal diameter Outer diameter mm Thickness mm Dimension mm Flare nut width mm A B C D 1 4 6 35 0 8 9 0 9 2 6 5 13 17 3 8 9 52 0 8 13 0 13 5 9 7 20 22 1 2 12 70 0 8...

Page 11: ...new equipment can be used with conventional refrigerant 1 Flare tool Pipe flaring Yes Note 1 O 2 Copper pipe gauge for adjusting projection margin Flaring by conventional flare tool Yes Note 1 Note 1 3 Torque wrench For Ø12 7 Connection of flare nut Yes 4 Gauge manifold Evacuating refrigerant charge run check etc Yes 5 Charge hose 6 Vacuum pump adapter Vacuum evacuating Yes O 7 Electronic balance ...

Page 12: ... service port at the outdoor unit s gas side Connect the charge hose to the vacuum pump adapter Open fully both packed valves at liquid and gas sides Place the handle of the gauge manifold Low in the fully opened position and turn on the vacuum pump s power switch Then evacuating the refrigerant in the cycle When the compound gauge s pointer has indicated 0 1 Mpa 76 cmHg place the handle Low in th...

Page 13: ...any foreign matter on the metal surface it assists the flow of brazing filler In the brazing process it prevents the metal surface from being oxidized By reducing the brazing filler s surface tension the brazing filler adheres better to the treated metal 1 Be sure to make setting so that liquid can be charged 2 When using a cylinder equipped with a siphon liquid can be charged without turning it u...

Page 14: ...ective to proceed with brazing while letting dry Nitrogen gas N2 flow 1 Brazing method to prevent oxidation 1 Attach a reducing valve and a flow meter to the Nitrogen gas cylinder 2 Use a copper pipe to direct the piping material and attach a flow meter to the cylinder 3 Apply a seal onto the clearance between the piping material and inserted copper pipe for Nitrogen in order to prevent backflow o...

Page 15: ...or air taking in air Hanging bolt Check cover Flexible drain hose Accessory 1 100 or more downward C Outside 19 7 18 57 5 120 172 WIRELESS REMOTE CONTROLLER SIGNAL RECEIVING UNIT 70 18 5 Drain up piping 177 or less 300 or less 350 or less 388 300 260 110 155 85 35 37 173 320 Refrigerant pipe connecting port Liquid side Drain pipe connecting port Refrigerant pipe connecting port Gas side A B C D Wi...

Page 16: ...N72 CHK DISP CN104 YEL CN102 RED CN101 BLK DC20V CN61 YEL T10 HA DC15V DC12V DC 7V Power supply circuit TA TCJ TC CN214 WHI Signal receiving unit 1 Broken line indicate the wiring at site Long dashed short dashed line indicate the accessories 2 indicates the terminal block indicates the connection terminal indicates the connector on the control P C board 3 indicates the protection ground 4 indicat...

Page 17: ...M16 Fan motor ICF 340WD94 3 or ICF 340WD94 4 Drain pump motor MDP 1401 Float switch FS 1A 31 P C board MCC 1643 TA sensor Lead wire length 328mm Vinyl tube TC sensor Ø6 size lead wire length 1000mm Vinyl tube Black TCJ sensor Ø6 size lead wire length 1000mm Vinyl tube Red ...

Page 18: ...3DV Connecting pipe Thickness 0 8mm Ø6 35 Sectional shape of heat insulator Allowable height difference Allowable pipe length INDOOR UNIT OUTDOOR UNIT RAS M16G3DV INDOOR UNIT OUTDOOR UNIT Connecting pipe Thickness 0 8mm Ø12 7 Connecting pipe Thickness 0 8mm Ø6 35 Sectional shape of heat insulator Allowable height difference Allowable pipe length NOTE Gas leak check position Refrigerant flow Coolin...

Page 19: ...unication Clean Function Initializing Circuit Clock Frequency Oscillator Circuit Power Supply Circuit Converter D C circuit Noise Filter Power Supply From Outdoor Unit M C U Indoor Unit Control Unit Indoor Fan Motor Control Indoor Fan Motor Serial Signal Transmitter Receiver Serial Signal Communication Operation Command and Information Remote Controller Infrared Rays 36 7kHz Operation Operation Mo...

Page 20: ...at Thermo off Side in Heating Operation 30 8 Additional Operation 31 8 1 QUIET mode 31 8 2 Hi POWER Mode 31 8 3 ECO mode 31 8 4 COMFORT SLEEP mode 32 9 One Touch Comfort 32 10 Temporary operation 32 11 Frequency fixed operation Test run 33 12 Self Cleaning function 34 13 Self Cleaning function release 35 14 Suction temperature correction 35 15 Remote A or B selection 36 16 Short Timer 36 17 Extern...

Page 21: ...rrent detection and prevention operation to IGBT module Compressor stop function Compressor and outdoor fan stop function when serial signal is off when the serial signal does not reach the board assembly of outdoor control by trouble of the signal system Transferring of operation information Serial signal from outdoor unit controller to indoor unit controller Detection of outdoor temperature and ...

Page 22: ...roller Selection of operation conditions ON OFF Signal receiving Control contents of remote controller ON OFF Operation select Temperature setup Air volume select AUTO LOW LOW MED MED HIGH ECO ON timer setup OFF timer setup Hi POWER COMFORT SLEEP QUIET PRESET ONE TOUCH Indoor unit control Command signal generating function of indoor unit operation Calculation function temperature calculation Activ...

Page 23: ...peration Actual outdoor unit operation 1 Pressed first Cooling dry Cooling dry Cooling Pressed last Cooling dry Cooling dry 2 Pressed first Heating Heating Heating Pressed last Heating Heating 3 Pressed first Fan only Fan only Stopped Pressed last Fan only Fan only 4 Pressed first Fan only Fan only Cooling Pressed last Cooling dry Cooling dry 5 Pressed first Cooling dry Cooling dry Cooling Pressed...

Page 24: ... unit 2 At the indoor unit side the indoor fan is operated according to the contents of 2 Indoor fan motor control and the drain pump according to the 5 Drain pump control 3 The outdoor unit controls the outdoor fan motor compressor pulse motor valve and 4 way valve according to the operation signal sent from the indoor unit Operation On Setup of remote controller Indoor fan motor control drain pu...

Page 25: ...ion temp correction of room temp control 1 6 DRY operation DRY operation is aimed to dehumidification In order to prevent lowering of the room temperature Indoor fan speed is fixed to cooling L tap Cooling capacity is restricted to low When the room temperature is lower than the setup temperature the compressor is turned off Remote controller command Control outline AUTO COOL HEAT operation mode i...

Page 26: ...does not change Mode in the parentheses indicates one in automatic cooling operation Value in the parentheses indicates one when thermostat of the remote controller works Value without parentheses indicates one when thermostat of the body works If the air speed has been changed once it is not changed for 1 minute However when the air speed is exchanged the air speed changes When heating operation ...

Page 27: ...F9 L 740 780 850 890 FA L 740 780 850 890 FB 730 730 770 820 FC 730 730 770 820 FD LL LL 610 610 610 610 Revolution speed of indoor fan rpm M07G3DV M10G3DV tap COOL HEAT External static pressure selection 10Pa 20Pa 35Pa 45Pa F1 HH 1120 1160 1240 1300 F2 HH 1120 1160 1240 1300 F3 H 1000 1040 1140 1200 F4 H 1000 1040 1140 1200 F5 H 920 970 1040 1120 F6 H 920 970 1040 1120 F7 L 830 870 930 980 F8 L 8...

Page 28: ...ontrolled based on the detected temperature of Tc sensor or Tcj sensor As shown below the upper limit of the revolution frequency is restricted However B zone is assumed as C zone for 6 minutes and after when the compressor activated In defrost operation the control value of Tc is shifted by 6 C In D and E zones the priority is given to air volume selection setup of remote controller In A zone whi...

Page 29: ... 4 Release protective control by temperature of indoor heat exchanger Freeze preventive control Low temperature release 1 The cooling operation including Dry operation is performed as follows based on the detected temperature of Tc sensor or Tcj sensor When J zone is detected for 6 minutes Following figure the commanded frequency is decreased from the real operation frequency After then the comman...

Page 30: ...status as that when thermostat OFF status that the air conditioner enters in the room temp monitor mode when the temperature reached the setup temperature on the remote controller 5 Drain pump control 1 In cooling operation including Dry operation the drain pump is usually operated 2 If the float switch works while drain pump drives the compressor stops the drain pump continues the operation and a...

Page 31: ...intermittent operation of the indoor fan The indoor fan operates with number of revolution of LL Fan ON time is 2 minutes and Fan OFF time is 2 to 4 minutes While heating operation is executed in two rooms if room temperature reached the setup temperature in both room had thermo off occurred both indoor units start intermittent operation of the indoor fan LL LL LL T off time To 5 C 2 min 5 To 10 3...

Page 32: ... of the remote controller and the unit operates as follows 1 Automatic operation The indoor unit operates in according to the current operation 2 Cooling operation The preset temperature drops 1ºC The value of the preset temperature on the remote controller does not change 3 Heating operation The preset temperature increases 2ºC The value of the preset temperature on the remote controller does not...

Page 33: ...on Operation condition for model to Europe market When an indoor unit receives One Touch Comfort Signal from the remote controller the indoor unit operates as following 1 Air conditioner starts to operation when the signal is received even if the air conditioner was OFF 2 Operation mode is set according to room temperature the same as AUTO mode 3 Target temperature is 24ºC 4 Fan operates depends o...

Page 34: ...un After approx 3 minutes a cooling operation starts forcedly Check cool air starts blowing If the operation does not start check wiring again 2 To stop a test run push TEMPORARY button once again Approx 1 second Check wiring piping of the indoor and outdoor units in test run In the TEST RUN all LEDs together keep blinking In order to prevent a serial operation the TEST RUN mode is released after ...

Page 35: ...etermined by the duration of the operation performed prior to the reception of the stop code 3 After the Self Cleaning operation has been performed for the specified period the unit stops operating During Self Cleaning operations The indoor fan operates continuously at a speed of M07 10 13 610 rpm M16 630 rpm Unit now performing cooling or dry operation Press STOP button Only PRE DEF indicator lig...

Page 36: ...conditioner Display will show in green color Hold down the TEMPORARY button for more than 20 seconds The air conditioner will stop suddenly when the TEMPORARY is pressed but keep holding it continue After holding about 20 seconds the air conditioner will beep 5 times and OPERATION display blinks 5 seconds The Self Cleaning function had been set 14 Suction temperature correction If difference betwe...

Page 37: ...rby rooms this operation prevents the remote controller signal from being received simultaneously by both units thus preventing both units from operating 3 Operation The indoor unit on which the remote controller selection has been set to B receives the signal of the remote controller also set to B At the factory the remote controller selection is set to A on all the indoor units There is no A set...

Page 38: ... FC data setting by wired remote controller By changing FC 5D data it is possible to set the external static pressure setting as shown in the table below If FC 5D is set to not 0000 external static pressure setting does not follow the positions of DIP SW501 1 2 At factory default FC 5D data is set to 0000 External static pressure SW501 2 SW501 1 10 Pa default OFF OFF 20 Pa OFF ON 35 Pa ON OFF 45 P...

Page 39: ... accidentally shut down When the unit is standby Not operating When the unit is in operation Operation Motions Press TEMPORARY button for more than three seconds Less than 10 seconds The unit is on standby The unit starts to operate The green indicator is on After approx three seconds release TEMPORARY button from being pushed The unit beeps three times and continues to operate The green indicator...

Page 40: ... power failure Operation Motions Press TEMPORARY button for more than three seconds Less than 10 seconds The unit is on standby The unit starts to operate The green indicator is on After approx three seconds release TEMPORARY button from being pushed The unit beeps three times and continues to operate If the unit is not required to operate at this time press TEMPORARY button once more or use the r...

Page 41: ... 2 Operation of remote control 1 ONE TOUCH Press the ONE TOUCH button for fully automated operation that is customized to the typical consumer preferences in your region of the world The customized settings control temperature air flow strength air flow direction and other settings to provide you alternate contact with ONE TOUCH OF THE BUTTON If you prefer other settings you can select from the ma...

Page 42: ...ontrol Pressing the TEMPORARY button the unit can start or stop without using the remote control Operation mode is set on AUTOMATIC operation preset temperature is 24 C and fan operation is automatic speed 8 TIMER OPERATION Daily timer allows the user to set both the ON OFF timers and will be activated on a daily basis Setting Daily Timer During the daily timer is activation both arrows or are ind...

Page 43: ...er low fan speed for quiet operation except in DRY mode Press Start and stop the operation Note Under certain conditions QUIET operation may not provide adequate cooling due to low sound features 12 COMFORT SLEEP OPERATION To save energy while sleeping automatically control air flow and automatically turn OFF Press Select 1 3 5 or 9 hrs for OFF timer operation Note The cooling operation the set te...

Page 44: ...r Indicates when the Hi POWER operation starts Press the Hi POWER button to start and press it again to stop the operation 7 P PRESET indicator Flashes for 3 seconds when the PRESET button is pressed during operation The P mark is shown when holding down the button for more than 3 seconds while the mark is flashing Press another button to turn off the mark 8 ECO indicator Indicates when the ECO is...

Page 45: ...her operating functions of your Toshiba unit Press Start the operation To automatically select cooling or heating operation 1 Press Select A 2 Press Set the desired temperature 3 Press Select AUTO LOW LOW MED MED or HIGH 1 Press Select Cool or Heat 2 Press Set the desired temperature 3 Press Select AUTO LOW LOW MED MED or HIGH For dehumidification a moderate cooling performance is controlled autom...

Page 46: ...tion Warm up the unit for 5 minutes before blowing warm air 3 Warm air control When the room temperature reaches the set temperature the fan speed is automatically reduced and the outdoor unit will stop 4 Automatic defrosting Fans will stop during defrost operation 5 Heating capacity Heat is absorbed from outdoor and released into the room When the outdoor temperature is too low use another recomm...

Page 47: ...ng Heat insulator 1 For insulating drain connecting section Signal receiving unit 1 Mounting bracket 1 For signal receiving unit Screw 2 M4 x 25 mm For signal receiving unit Screw 2 M4 x 40 mm For signal receiving unit Wood Screw 2 Ø3 8 x 16 mm For signal receiving unit Spacer 4 For signal receiving unit Pattern template 1 95 mm x 51 mm For signal receiving unit Remote controller 1 Battery 2 Remot...

Page 48: ...of the blown air will be disrupted a disruption of the air flow may cause the air conditioner s performance to deteriorate or the unit to shut down Locations where an in house power generator is used for the power supply The power line frequency and voltage may fluctuate and the air conditioner may not work properly as a result On truck cranes ships or other moving conveyances The air conditioner ...

Page 49: ...me to contact with the high humidity atmosphere Apply also a sufficient heat insulation to the duct and connecting part of the duct Installation space Under air intake Back air intake Reference Condensation test conditions Indoor side 27 C dry bulb temperature 24 C wet bulb temperature Air volume Low air volume operation time 4 hours A 235 or more Air outlet Refrigerant piping 5 or more Drain pipi...

Page 50: ...o make mistake to install the setting direction Carry the package by two or more persons and do not bundle it with plastic band at positions other than specified To install vibration isolation material to hanging bolts confirm that it does not increase the unit vibration External dimensions Unit mm Hanging bolt Model type A B C M07 10 13G3DV 770 700 650 M16G3DV 970 900 850 Hanging bolt pitch A 80 ...

Page 51: ...tly in order to prevent vibration of ceiling board Attach the nuts and the M10 flat washers to the hanging bolt Put washers at up and down of the hanging bracket of the indoor unit to hang down the indoor unit Check that four sides are horizontal with a level gauge Horizontal degree Within 5 mm REQUIREMENT Hang the unit in a horizontal position When unit is hanged to slant it may cause overflow of...

Page 52: ...mine a place where the remote controller is operated and the installation place Operate the remote controller confirm that the indoor unit receives a signal surely and then install it Keep 1 m or more from the devices such as television stereo Disturbance of image or noise may generate To prevent a malfunction select a place where is not influenced by a fluorescent light or direct sunlight Suction...

Page 53: ...rn 95 x 51 mm 2 Pass the wire through the provided mounting bracket and insert the bracket into the installation hole Fig 3 3 Use bracket parts A and B to securely grip the ceiling material Fig 4 4 Connect the housing of Signal receiving unit with the connector of wires extended from the indoor unit 5 Insert a slotted screwdriver into the opening at the bottom of the remote controller Remove the l...

Page 54: ...insulating process are procured locally Connection of drain hose Connect a hard socket locally procured to the hard socket of the attached supplied flexible hose Connect a drain pipe locally procured to the connected hard socket REQUIREMENT Connect hard vinyl chloride pipes securely using an adhesive for vinyl chloride to avoid water leakage It takes some time until the adhesive is dried and harde...

Page 55: ...n pipe connecting port transparent and that no water is leaking from the drain pipe When the electrical and wiring work has not been completed Disconnect the float switch connector 3P red from the connector CN34 red on the P C board inside the electrical control box Before doing this the power must be turned off Connect a 220 V to 240 V supply voltage to 1 and 2 on the power supply terminal block ...

Page 56: ...rain connecting section 10 6 Duct design Arrangement Referring to the following dimensions manufacture duct at the local site Indoor unit Banding band Locally procured Wrap the attached heat insulator seamlessly from the surface of the indoor unit Heat insulator of the drain connecting section Accessory Heat insulator Locally procured Direct the slits and seams of the heat insulator upward to avoi...

Page 57: ...Pa Low 20Pa Low 10Pa High 45Pa Lower limit of external static pressure 45Pa High 35Pa High 10Pa High 20Pa Upper limit of external static pressure 45Pa High 45Pa Lower limit of external static pressure 45Pa High 35Pa High 10Pa High 20Pa Low 35Pa Low 20Pa Low 10Pa Low 45Pa 0 10 20 30 40 50 60 200 300 400 500 600 700 800 900 Standard Air Volume 780m3 h RAS M16G3DV Series External Static Pressure Pa A...

Page 58: ...and sealing may occur dewing resulted in falling of water drop Connect a duct to the outside of the flange In addition the duct must be covered with insulation material so that the flange will not be exposed Duct Insulation material locally procured Flange locally procured Aluminum tape locally procured Flange Air discharge side Indoor unit Air intake side Under surface Aluminum tape locally procu...

Page 59: ...er than that of R22 Approx 1 6 times Therefore using a torque wrench tighten the flare pipe connecting sections which connect the indoor and outdoor units of the specified tightening torque Incorrect connections may cause not only a gas leak but also a trouble of the refrigeration cycle CAUTION Tightening with an excessive torque may crack the nut depending on installation conditions Airtight test...

Page 60: ...ntroller wiring Strip off approx 9 mm the wire to be connected Wiring diagram NOTE Even if the wireless remote controller of accessory parts connects with terminal block of indoor unit it cannot be used Earth screw Optional remote controller wiring Connecting cable Side C Space 4 mm Side D Space 8 5 mm Select side C or D for the power cable clamping position referring to the following table accord...

Page 61: ...isplay 4 Press during pushing B will show on the display and 00 will disappear and the air conditioner will turn OFF The Remote Control B is memorized Note 1 Repeat above step to reset Remote Control to be A 2 Remote Control A has not A display 3 Default setting of Remote Control from factory is A Test Operation To switch to the TEST RUN COOL mode press TEMPORARY button for 10 seconds The beeper w...

Page 62: ... 2 Primary Judgment 3 Judgment by Flashing LED of the signal receiving unit 4 Self Diagnosis by Remote Controller 5 Judgment of Trouble by Every Symptom No Troubleshooting Procedure 6 How to Check Simply the Main Parts 7 Troubleshooting 8 How to Diagnose Trouble in Outdoor Unit 9 How to Check Simply the Main Parts 10 How to Simply Judge Whether Outdoor Fan Motor is Good or Bad No Operation of air ...

Page 63: ...d when air conditioner operates 2 When item B and C and item B and a part of item E occur concurrently priority is given to the block of item B 3 The check codes can be confirmed on the remote controller for servicing Item Check code Block display Description for self diagnosis A OPERATION Green Flashing display 1 Hz Power failure when power is ON B OPERATION Green Flashing display 1 Hz Protective...

Page 64: ...e display of the remote controller Alphanumeric characters are used for the check codes is 5 is 6 is A is B is C is D Press ON or OFF button If there is no fault with a code the indoor unit will beep once Beep and the display of the remote controller will change as follows The TIMER indicator of the signal receiving unit flashes continuously 5 times per 1 sec Check the unit with all 52 check codes...

Page 65: ...r sensor is normal check P C board Lock of indoor fan or trouble on the indoor fan circuit All off Displayed when error is detected 1 Check the motor 2 When the motor is normal check P C board Float SW operation Operation continues Outdoor units stop Displayed when error is detected 1 Check the drainage 1 Amount of residual drain 2 Drain water piping installation situation 2 Float SW operation che...

Page 66: ...n again all operations stop immediately Replace P C board Being out of place disconnection or shortcircuit of the outdoor heat exchanger sensor TE or suction temp sensor Ts All off Displayed when error is detected 1 Check sensors TE TS 2 Check P C board Disconnection or shortcircuit of discharge temp sensor Td All off Displayed when error is detected 1 Check discharge temp sensor TD 2 Check P C bo...

Page 67: ...t operates normally during check If return serial signal does not stop between indoor terminal block 2 and 3 replace inverter P C board If signal stops between indoor terminal block 2 and 3 replace indoor P C board Compressor does not rotate Current protective circuit does not operate when a specified time passed after compressor had been activated All off Displayed when error is detected 1 Troubl...

Page 68: ... control NO NO NO YES YES YES Does transmission mark on remote control flash normally and is its signal transmitted properly YES Does transmission mark on remote control flash normally and is its signal transmitted properly Remote control is defective Operation Check item Conceivable principle cause Measure Item by symptoms Refer to 4 Troubleshooting for Remote Control Unit operates normally Is fu...

Page 69: ...ough Indoor P C board is replaced Confirmation procedure Turn on power supply Does operation lamp flash Is wired correctly to white and black lead wires of terminal board Correct wiring To item of Power is not turned on YES NO YES NO ...

Page 70: ...C board correct Replace the indoor fan motor Model name for the indoor fan motor ICF 340WD94 3 Checking procedure Measure the resistance of the following terminals with the tester Internal motor circuit is damaged if the measured value is out of the range in below table Measure by connecting the com side to 4 Black while measuring The measurement may vary Pin No 7 6 5 4 3 2 1 Color Blue Yellow Whi...

Page 71: ...door unit operate when moving remote control near receiver or indoor unit NO The unit does not beep at all OPERATION lamp on indoor unit is not indicated Is there any thyristor fluorescent light nearby NO YES YES NO YES YES NO Batteries are exhausted Is transmission mark indicated Does indoor unit start to operate by automatic restart function Does indoor unit beep and operate Does radio sound is ...

Page 72: ... C board hold the whole housing Do not pull at the lead wire 2 Inspection procedures 1 When a P C board is judged to be defective check for disconnection burning or discoloration of the copper foil pattern or this P C board 2 The P C board consists of the following 2 parts a Main P C board part DC power supply circuit Indoor fan motor control circuit CPU and peripheral circuits buzzer b The signal...

Page 73: ...d they return to normal 3 seconds later The indicators are defective or the housing assembly CN214 is defective 5 Push button once to start the unit Shorten the restart delay timer Set the operation mode to COOL Set the fan speed level to AUTO Set the preset temperature much lower than the room temperature The unit compressor operates continuously in the above condition 1 Check whether or not the ...

Page 74: ...01 Red TA sensor CN104 Yellow DC5V Drain pump CN504 White DC12V TC sensor CN101 Black DC5V TCJ sensor CN102 Red DC5V Float SW CN34 Red DC12V Wired remote controller CN40 Blue DC20V External static pressure select SW SW501 Power supply LED of wired remote controller D403 Red 10 0 20 30 40 50 10 20 30 60 Resistance kΩ Temperature C TA sensor 30 0 0 20 10 0 10 20 30 40 50 60 70 80 90 100 50 100 150 2...

Page 75: ...m temp TA sensor Heat exchanger TC sensor Disconnect the connector and measure the resistance value with tester Normal temp 2 Remote controller Refer to 11 5 1 4 3 Indoor fan motor Refer to 11 5 1 3 10 C 20 C 25 C 30 C 40 C TA TC kΩ 20 7 12 6 10 0 7 9 4 5 Temperature Sensor ...

Page 76: ...1 While holding the suction panel with your hand so that the panel does not fall off tighten the screws that you removed in step 1 1 of 1Suction panel 2 Terminal cover 1 Detachment 1 Slightly loosen the screw holding the terminal cover in place Ø4 10 1 pcs 2 Lifting the terminal cover upward pull the right side of the cover toward you and then disengage the claws on the left side of the cover from...

Page 77: ... C board NOTE Unlock the lock of the housing to disconnect the connectors CN41 Remote control connector 2P Blue CN67 Power supply connector 5P Black CN214 Signal receiving lead wire 9P White 5 Lift the electric parts box cover upward and pull the cover to the left toward you to detach it from the claws on the right side 2 Attachment 1 Insert the hooking plates of the main body into the hook holes ...

Page 78: ...place Ø4 10 3 pcs The electric parts box will not fall off even when the screws are removed 5 Move the electric parts box in the direction opposite to the air blow off port side to disengage the hooking plates and then remove the electric parts box from the under air intake side 2 Attachment 1 Insert the hooking plates of the electric parts box into the hooking parts of the main body 2 Carefully r...

Page 79: ...to remove the control P C board 2 Attachment 1 Attach the control P C board to the clamps 2 Reconnect the cables that you disconnected in step 1 2 of 6Control P C board NOTE Check there is no missing or contact failure on the connectors 7 Reactor 1 Detachment 1 Perform the procedure in 1 of 3 Electric parts box cover 2 The connector of reactor CN01 is removed from control P C board 3 Remove the sc...

Page 80: ...upper which is hooked to the blower base downward to remove the fan case upper 2 Attachment 1 Use the hooking plate to hook the fan case upper to the blower base to attach the fan case upper NOTE Make sure the fan case upper does not move even if you pull on it 2 Use the screws that you removed in step 1 4 of 8Fan case lower upper to attach the fan case upper 3 Insert the tip of the fan case lower...

Page 81: ...ed 7 Hold the motor bands with your hand so that they do not fall off and remove the bands 8 Loosen the hexagonal hole screw of the multi blade fan and remove the fan from the shaft 2 Attachment 1 Insert the fan motor shaft into the multi blade fan and secure it loosely With the shaft still loosely secured assemble the fan motor and secure it using the motor band NOTE When assembling the fan motor...

Page 82: ...lade fan with torque wrench 4 9 N m or more 3 Perform the procedure in steps 2 3 and 2 4 of 8Fan case lower upper to attach the fan case lower 4 Reconnect the cables that you disconnected in steps 1 3 and 1 4 of 9Fan motor Multi blade fan NOTE Check there is no missing or poor contact of the connectors Finally check whether the multi blade fan turns surely and smoothly or not ...

Page 83: ...caused When pulling out the drain pan some drain water may still be left in the pan so be absolutely sure to discard this water 5 After pulling out the drain pan slightly pull it out again toward the air intake side to detach the pan 2 Attachment 1 Hook the drain pan to the flange portion of the air intake side to attach the pan and then push it in 2 Hook the under panel on the screws that you unt...

Page 84: ...onents from the side The drain pump and other drain pump kit components are fixed to the side cover NOTE If the pipes are damaged refrigerant leak may be caused Take out them with great care One of two methods can be used Either pull out the drain pump from the side or remove the screws 3 locations used to fix the drain pump in place from the bottom side and take out the drain pump from the bottom...

Page 85: ...nger fixed plate pipe side and detach the plate pipe side Ø4 10 3 pcs NOTE One screw 1 location is concealed by the drain pump Shift the drain pump slightly in order to remove the screw If it is difficult to remove the screws on the U pipe side remove the under panel When removing the top side screw on the U pipe side use a longish screwdriver as necessary Also when removing the upper side screw u...

Page 86: ... 85 13 EXPLODED VIEWS AND PARTS LIST 13 1 Indoor Unit ...

Page 87: ...008 NUT FLARE 1 1 1 217 43H49010 NUT FLARE 1 1 1 1 1 1 1 1 1 1 1 1 218 43H72001 PAN ASSY DRAIN 1 1 1 1 1 1 1 1 1 219 43H72002 PAN ASSY DRAIN 1 1 1 220 43H79001 CAP DRAIN 2 2 2 2 2 2 2 2 2 2 2 2 221 43H77001 PUMP DRAIN 1 1 1 1 1 1 1 1 1 1 1 1 222 43H19006 COVER ASSY SIDE 1 1 1 1 1 1 1 1 1 1 1 1 223 43H19007 COVER PIPE 1 1 1 1 1 1 1 1 1 1 1 1 224 43H00024 FLANGE OUTLET 1 1 1 1 1 1 1 1 1 225 43H00025...

Page 88: ... 43H50012 SENSOR TA 1 1 1 1 1 1 1 1 1 1 1 1 405 43H60013 TERMINAL 3P 1 1 1 1 1 1 1 1 1 1 1 1 406 43H60014 TERMINAL 2P 1 1 1 1 1 1 1 1 1 1 1 1 407 43H69018 PC BOARD ASSY MCC 1643 1 1 1 407 43H69019 PC BOARD ASSY MCC 1643 1 1 1 407 43H69020 PC BOARD ASSY MCC 1643 1 1 1 407 43H69021 PC BOARD ASSY MCC 1643 1 1 1 408 43H63001 HOLDER SENSOR TA 1 1 1 1 1 1 1 1 1 1 1 1 4 16 10641 4 SENSOR TC TERMINAL 3P T...

Page 89: ...en the operation is stopped ÆPerform the test mode in the Cool or Heat mode ÆTemperature setting cannot be adjusted during the test mode ÆCheck codes are displayed as usual 5 When the test mode is finished push the button to select 1 Test mode on the Field setting menu screen then push the Set F2 button The screen 3 appears ÆPushing the Yes F1 button stops the test mode screen and continues the no...

Page 90: ...sor to select data with the F2 button then set data with the button 4 Push the MENU button to set the other Function codes After Continue is displayed on the screen push the Yes F1 button 5 Push the No F2 button to finish the setting operation appears on the screen for a while then the screen returns to the Field setting menu screen ÆPushing the No F2 button displays the unit selection screen when...

Page 91: ...sor selection 0000 Body TA sensor 0001 Remote controller sensor 0000 Body sensor 5d External static pressure 0000 Depends on DIPSW 501 1 2 1 Push the button to select 4 Monitor function on the Field setting menu screen then push the Set F2 button ÆPush the button to select the code to check data 2 Push the CANCEL button to return to the Field setting menu screen SET DATA External static pressure 0...

Page 92: ...the first time is displayed for the repeated alarm 1 Push the Reset F2 button while the list of alarm history is displayed 2 Push the Yes F1 button after the confirmation screen is displayed ÆDelete the alarm history in each remote controller when the dual remote controller system is used 1 Test mode 2 Register service info 3 Alarm history 4 Monitor function 5 FC setting Field setting menu Return ...

Page 93: ......

Page 94: ...nditioning China Co Ltd Building 1 No 60 21st Avenue Baiyang Street Hangzhou Economic and Technological Development Area China First issue Revision 1 Change of knockout hole diameter Page 14 Sep 2014 Mar 2015 Revision record ...

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