Fujitsu RDG18LHTBP Service Instruction Download Page 4

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1-1. COOLING OPERATION

1-1-1 COOLING CAPACITY CONTROL

A sensor (room temperature thermistor) built in the indoor unit will usually perceive

difference or variation between a set temperature and present room temperature, and

controls the operation frequency of the compressor.

* If the room temperature is 6.0°C higher than a set temperature,

the compressor operation frequency will attain to maximum performance.

* If the room temperature is 1.0°C lower than a set temperature, the compressor

will be stopped.

* When the room temperature is b6.0°C to -1.0°C of the setting temperature,

the compressor frequency is controlled within the range shown in Table1.

However, the maximum frequency is limited in the range shown in Fig.1 based on the

fan speed mode and the outdoor temperature.

minimum

frequency

maximum

frequency

10rps

120rps

102rps

60rps

51rps

43rps

37rps

55rps

49rps

43rps

25rps

34rps

A zone

B zone

C zone

D-F zone

Model 18

( Table 1 : Compressor Frequency Range )

( Fig. 1 : Limit of Maximum Frequency based on Outdoor Temperature )

01-01

111rps

80rps

62rps

47rps

40rps

67rps

56rps

47rps

25rps

34rps

A zone

B zone

C zone

D-F zone

Model 24

Fan speed mode

Outdoor air

temperature

A zone

B zone

C zone

D zone

E zone

F zone

When the room

temperature rises

When the room

temperature drops

36°C

32°C

21°C

12°C

2°C

34°C

30°C

19°C

10°C

0°C

AMP Air Conditioning

www.ampair.co.uk | [email protected]

Summary of Contents for RDG18LHTBP

Page 1: ...IONER DUCT type Models Indoor unit Outdoor unit AR G18LHTBP AR G24LHTBP RDG18LHTBP ROG18LBCA RDG24LHTBP ROG24LBCA AO G18LBCA AO G24LBCA INVERTER SERVICE INSTRUCTION R410A AMP Air Conditioning www ampair co uk sales ampair co uk ...

Page 2: ... MINUTES 3 MINUTES ST 01 14 1 12 4 WAY VALVE EXTENSION SELECT 01 14 1 13 AUTO RESTART 01 14 1 14 PUMP DOWN 01 15 1 15 COMPRESSOR PREHEATING 01 16 1 16 10 C HEAT OPERATION 01 16 1 20 VARIOUS PROTECTIONS 01 20 1 21 AUTOMATIC AIRFLOW ADJUSTMENT 01 21 1 19 OFF DEFROST OPERATION CONTROL 01 19 1 18 DEFROST OPERATION CONTROL 01 17 1 17 ECONOMY OPERATION 01 16 1 22 DRAIN PUMP OPERATION 01 22 2 1 ERROR DIS...

Page 3: ...1 DESCRIPTION OF EACH CONTROL OPERATION R410A DUCT type INVERTER AMP Air Conditioning www ampair co uk sales ampair co uk ...

Page 4: ...ge shown in Table1 However the maximum frequency is limited in the range shown in Fig 1 based on the fan speed mode and the outdoor temperature minimum frequency maximum frequency 10rps 120rps Hi Me Lo Qu 102rps 102rps 60rps 51rps 43rps 37rps 55rps 55rps 49rps 49rps 49rps 43rps 25rps 34rps 34rps 34rps A zone B zone C zone D F zone Model 18 Table 1 Compressor Frequency Range Fig 1 Limit of Maximum ...

Page 5: ...0 C than a set temperature the compressor operation frequency will attain to maximum performance If the room temperature is higher 1 0 C than a set temperature the compressor will be stopped When the room temperature is between 1 0 C to 6 0 C of the setting temperature the compressor frequency is controlled within the range shown in Table2 Table 2 Compressor Frequency Range minimum frequency maxim...

Page 6: ...n the Table 3 Table 3 Compressor frequency Fig 2 Compressor Control based on Room Temperature 01 03 Ts Setting temperature Ts 0 5 C Ts 1 5 C Operating frequency 34rps X zone J zone 0rps Y zone Room Room temperature temperature X zone J zone Y zone Ts 1 5 C Ts 0 5 C Fig 3 Indoor Fan Control 10 30 60 360 120 360 120 10 30 sec OFF S Lo Lo OFF Setting air flow Compressor ON AMP Air Conditioning www am...

Page 7: ...pped for 6 consecutive minutes by the temperature control function after the Cooling or Heating mode was selected at above operation is switched to Monitoring and the operation mode is selected again When the middle zone is selected on the predetermining of the operation mode the operation mode before the changing to the monitor mode is selected 1 2 3 1 Fig 4 Outdoor temperature zone selection Coo...

Page 8: ...eration command other than auto changeover operation NO Thermostat remains in OFF state for 6 minutes or longer System stops or operation command other than auto changeover operation Middle zone NO NO Operation mode of outdoor unit Cooling YES NO Operation mode of outdoor unit Heating YES NO YES Outdoor temperature 25 C NO YES YES YES NO YES YES Operation mode before the monitor mode is cooling mo...

Page 9: ... run according to a room temperature as shown in Fig 5 On the other hand if switched in HIGH LOW the indoor motor will run at a constant airflow of COOL operation modes LOW MED HIGH as shown in Table 5 Fig 5 Airflow change over Cooling AUTO When the room temperature rises When the room temperature drops TR Room temperature Ts Setting temperature TR Ts 2 C 1 C TR Ts 2 C TR Ts 1 C TR Ts 2 5 C 1 5 C ...

Page 10: ...R Ts 2 0 C TR Ts 1 5 C 2 5 C TR Ts 1 5 C TR Ts 2 5 C LOW mode MED mode HIGH mode 5 COOL AIR PREVENTION CONTROL Heating mode The maximum value of the indoor fan speed is set as shown in Fig 7 based on the detected temperature by the indoor heat exchanger sensor on heating mode When the compressor does not operate the indoor fan motor operates S Lo mode Fig 7 Cool Air Prevention Control On the Quiet...

Page 11: ... unit is stopped the indoor unit fan operates continuously following the setting on the remote controller 01 When the outdoor unit is stopped the indoor unit fan operates intermittently at a very low speed 02 Enable or disable this function by remote controller setting Set to 00 or 01 when connecting a remote controller that cannot set the Fan control for energy saving function or connecting a net...

Page 12: ... F zone G zone D zone Normal 1 D zone Normal 2 F zone G zone 21 C 12 C 2 C 19 C 10 C 0 C 68rps 40rps 35rps 24rps 15rps 72rps 43rps 37rps 27rps 15rps Hi2 Hi1 19rps and over Hi 1 16rps and over Me 1 16rps under Lo 1 Me2 Me1 Lo2 Lo1 3 Cool Dry F zone 51rps and over Hi 1 43rps and over Me 1 43rps under Lo 1 4 Cool Dry G zone 51rps and over Hi 1 43rps and over Me 1 43rps under Lo 1 43rps and over Hi 1 ...

Page 13: ...TION FREQUENCY CONTROL AT START UP The compressor frequency soon after the start up is controlled as shown in Fig 9 Fig 9 Compressor Control at Start up Normal start up 35rps 53rps 66rps 82rps 106rps Frequency Time Time 1 Time 2 Time 3 Time 4 Frequency Frequency Frequency Frequency Frequency Frequency Frequency Time 5 Frequency Frequency Frequency 80sec 160sec 300sec 440sec 500sec Time 1 Time 2 Ti...

Page 14: ...rried over to next day The ON timer and the OFF timer functions cannot be set with using the weekly timer Both ON and OFF time must be set 2 WEEKLY TIMER 2 1 WEEKLY TIMER Stop mode Stop mode Stop mode Operation mode Operation mode Set time Set time Set time Set time 01 11 UTY RNR Z1 2 wire remote controller 1 8 1 Wired Remote Controller ON TIMER 3 wire remote controller can be connected If 3 wire ...

Page 15: ... day setting If the operating time carries over to the next day during a next day setting the effective DAY OFF range will be set as shown below 2 2 DAY OFF setting Stop mode Stop mode Operation mode Stop mode Operation mode Preceding day Next day DAY OFF Stop mode Stop mode Operation mode Stop mode Operation mode DAY OFF Setting day Preceding day Next day Setting day AMP Air Conditioning www ampa...

Page 16: ...er allows the OFF timer and ON timer to be used in combination one time Operation mode Operation will start from the timer setting either OFF timer or ON timer whichever is closest to the clock s current timer setting The order of operations is indicated by the arrow in the remote control unit s display SLEEP timer operation cannot be combined with ON timer operation Stop mode Stop mode Stop mode ...

Page 17: ...n mode When the sleep timer is set the setting temperature is increased 1 degC It increases the setting temperature another 1 degC after 1 hour After that the setting temperature is not changed and the operation is stopped at the time of timer setting Ts 1 C 2 C 2 C 1 C 4 C 3 C Set 60min In the HEATING operation mode When the sleep timer is set the setting temperature is decreased 1 degC It decrea...

Page 18: ...essor stopped 1 11 PREVENT TO RESTART FOR 3 MINUTES 3 MINUTES ST 1 12 4 WAY VALVE EXTENSION SELECT 01 15 Touch the Test run in the Maintenance screen The Test Run screen is displayed Touch OK to return to the Maintenance screen and start the test run The test run will automatically end is approximately 60 min If you wish to cancel the test run before it is complete return to the Monitor Mode scree...

Page 19: ...ower is interrupted and recovered during timer operation timer operation is canceled but only setting time is memorized Operation contents memorized when the power is interrupted Operation mode Energy saving setting Set temperature Set air flow Timer mode and timer time Set by wireless remote controller 10 C HEAT Wireless remote controller is in use Each central setting ECONOMY 1 13 AUTO RESTART A...

Page 20: ...The 10 C HEAT operation The 10 C HEAT The 10 C HEAT operation can be set by the wireless remote controller functions by pressing 10 C HEAT button on the remote controller operation is almost the same operation as below settings Mode Heating Setting temperature 10 C Fan mode AUTO Table9 1 17 ECONOMY OPERATION The ECONOMY operation functions by pressing ECONOMY button on the remote controller The EC...

Page 21: ...ST Defrosting after 2 time upon starting operation ND Compressor integrating operation time Compressor integrating operation time Compressor integrating operation time Less than 22 min 22 to 62 min More than 62 min Does not operate 9 C 5 C Less than 35 min More than 35min Does not operate Integrating defrost Constant monitoring More than 240 min For long continuous operation Less than 10min 1 For ...

Page 22: ...Defrost end Compressor integrating operation Over 22 min Outdoor heat exchanger temperature Below 9 C Outdoor heat exchanger temperature Below 5 C Compressor integrating operation Over 35 min 2nd and later defrost Integrating defrost Constant monitoring Defrost Indicator Operation lamp 6 sec ON 2 sec OFF Defrost start Tn Tn10 5deg Tn Tnb 2deg However Tn 6 C Compressor OFF count 40 times Less than ...

Page 23: ...tion more than 10 minutes and compressor operation integrating time lasts for more than 30 minutes OFF Defrost Flow Chart Heating operation stop Outdoor heat exchanger temperature Below 4 C Compressor continuous operation Over 10 minutes Compressor integrating operation Over 30 minutes Defrost start Defrost Indicater Operation lamp 6 sec ON 2 sec OFF Outdoor heat exchanger temperature Over 13 C or...

Page 24: ...erature Temperature Temperature Temperature 01 21 The compressor frequency is controlled so that the outdoor unit input current does not exceeds the current limit value that was set up with the outdoor temperature The compressor frequency returns to the designated frequency of the indoor unit at the time when the frequency becomes lower than the release value 2 CURRENT RELEASE CONTROL Table 15 Cur...

Page 25: ...unit heat exchange sensor temperature rises to 67 C or greater the compressor is stopped and trouble display is performed When satisfy the following conditions the protection works When detecting the above condtion recheck the condition after 6 minutes When count the twice the protection works Protection contents Reduce the static pressure 20 Pa When it does not dissolve even the minimum static pr...

Page 26: ...do not operate the Outdoor unit 3 The air conditioner will run for about 1 to 8 min then stop automatically Do not change the throttles of the inlet and outlet ports during operation When used in a Group control system the setting will take about 10 min When the Error code 15 4 Automatic Air flow Adjustment Error appears the setting is not completed Refer to the Trouble shooting Error code15 4 Tur...

Page 27: ...arts Cooling operation 1 2 1 When the water level in the drain pan rises up and then the float switch functions Drain pump operates continuously for 3 minutes after the float switch is turned off Almost condensing water may be drained 2 When the float switch turns ON continuously for 3 minutes FAILURE INDICATION operates Thereafter even if the float switch turns OFF the FAILURE INDICATION is not r...

Page 28: ...2 TROUBLE SHOOTING R410A DUCT type INVERTER AMP Air Conditioning www ampair co uk sales ampair co uk ...

Page 29: ...Thermistor Error Heat Sink Thermistor Error Current sensor Error Pressure sensor Error Heat Ex Liquid Outlet Thermistor Error Compressor Thermistor Error Compressor rotor position detection Error Outdoor Unit Fan Motor Error 4 way Valve Error Discharge Temp Error Compressor Temp Error PFC circuit Error Automatic Air flow Adjustment Error 1 If an error occurs an error icon appears on the Monitor mo...

Page 30: ... Manual Check Point 3 Check the voltage of power supply Check the voltage of power supply Check if AC198V AC220V 10 264V AC240V 10 appears at Outdoor Unit Terminal L N Check Point 4 Check Serial Signal Reverse Transfer Signal Check Serial Signal Reverse Transfer Signal Check if Indicated value swings between AC90V and AC270V at Outdoor Unit Terminal L 3 If it is abnormal Check Outdoor unit fan mot...

Page 31: ...it and outdoor unit If there is an abnormal condition correct it by referring to Installation Manual or Data Technical Manual Check connection condition in control unit If there is loose connector open cable or mis wiring Check Point 3 Check the voltage of power supply Check the voltage of power supply Check if AC198V AC220V 10 268V AC240V 10 appears at outdoor unit terminal L N Check Point 4 Chec...

Page 32: ...Wired Remote Controller for 1 minute or more If it is DC13V Remote Control is failure Controller PCB is normal Replace Remote Control If it is DC 0V Controller PCB is failure Check Remote Control once again Replace Controller PCB Ceck Voltage at CN14 of Controller PCB Terminal 1 3 Terminal 1 2 Power supply for the Remote Control Indicate or Display Error code 12 02 04 Check Point 2 1 Check Indoor ...

Page 33: ...uses heat Upon the temperature coming down restart operation On automatic airflow adjustment operation when the fan speed other than 0rpm is detected at the 0rpm operation On automatic airflow adjustment operation when the fan speed is not reach the target speed after 2 minutes from the fan started On automatic airflow adjustment operation operation when the 750W of input power is detected Check P...

Page 34: ... controller PCB If there is loose connector open cable or mis wiring the same a signal has not been received for 15sec After receiving a signal from the external I O PCB 1 Connection failure 2 External I O PCB failure 3 Controller PCB failure Check Point 1 Check the connection Check Point 2 Replace external I O PCB If Check Point 1 do not improve the symptom change External I O PCB OK OK Check Poi...

Page 35: ...cast of Cause OK Combination error Indoor unit 1 The selection of indoor units is incorrect Check Point 1 Check the type of indoor unit Check the type of the connected indoor unit If abnormal condition is found correct it Check Point 2 Replace Main PCB If Check Point 1 do not improve the symptom replace Main PCB of Outdoor unit Indicate or Display Error code 23 02 07 Outdoor unit No indication AMP...

Page 36: ... Wrong wire connection in RCgroup Please refer to the installation manual Change controller PCB and check the Error after setting remote controller address Check if controller PCB damage Check Point 2 Wrong RCgroup setting The given address number by auto setting 00 and the manual set number Except 00 were not existing in one RCG The remote controller address setting by U I were not existing same ...

Page 37: ...re out of specified rule Forecast of Cause 1 Wrong wiring Number of I U RC in RCgroup 2 Indoor unit controller PCB defective Check Point 1 Wire installation Wrong number of connecting indoor unit Check Point 2 Check Indoor unit controller PCB Check if controller PCB damage Check if controller PCB and check the Error after setting remote controller address Indicate or Display Error code 29 Outdoor ...

Page 38: ...r any electronic equipment which causes harmonic wave Note EEPROM EEPROM Electronically Erasable and Programmable Read Only Memory is a non volatile memory which keeps memorized information even if power is turned off It can change the contents electronically To change the contents it uses higher voltage than normal and it can not change a partial contents Rewriting shall be done upon erasing the ...

Page 39: ...motor OK OK OK Rotate the fan by hand when operation is off Check if fan is caught dropped off or locked motor If Fan or Bearing is abnormal replace It Check excessively high temperature around the motor if there is any surrounding equipment that causes heat Upon the temperature coming down restart operation Check Point 4 Replace Power Supply PCB If Check Point 1 3 do not improve the symptom repla...

Page 40: ...moved Check erroneous connection Check if cable is open Upon correcting the removed connector or mis wiring reset the power Check Point 1 Check external cause at lndoor and Outdoor Voltage drop or Noise Instant drop Check if there is a large load electric apparatus in the same circuit Momentary power failure Check if there is a defective contact or leak current in the power supply circuit Noise Ch...

Page 41: ... unit controller PCB defective 1 Communication PCB defective Check Point 1 Check the connection of terminal Indoor unit Check the connection the communication PCB and the controller PCB After turning off the power supply check correct the followings If the Check point 1 is ok replace the communication PCB Indicate or Display Error code 3A 02 13 Check Point 3 Replace the controller PCB If condition...

Page 42: ...or cable is open Reset Power when reinstalling due to removed connector or incorrect wiring 6 5 8 0 10 0 12 5 15 8 20 2 25 9 33 6 3 59 4 35 5 3 Resistance value k OK OK Check Point 3 Check Voltage of Controller PCB DC 5 0V Make sure circuit diagram of each indoor unit and check terminal voltage at Thermistor DC5 0V If the voltage does not appear replace Controller PCB and execute the check operati...

Page 43: ...Error 31 7 39 6 49 7 62 9 80 3 103 134 176 17 1 20 8 25 6 Resistance value k Temperature C Temperature C 0 40 45 50 5 10 15 20 25 30 35 Resistance value k Check Point 2 Remove connector and check Thermistor resistance value Thermistor Characteristics Rough value If Thermistor is either open or shorted replace it and reset the power OK OK Check Point 3 Check voltage of Controller PCB DC5 0V Make su...

Page 44: ...tor If Fan or Bearing is abnormal replace It Check excessively high temperature around the motor if there is any surrounding equipment that causes heat Upon the temperature coming down restart operation When the fan motor speed is less than 1 3 of the target fan speed for 56 seconds When detect the 0 rpm for 56 seconds after fan motor started Check Point 4 Replace Power Supply PCB If Check Point 1...

Page 45: ...lure 5 Hose clogging Check Point 2 Check Connector and Wire Check loose contact of CN9 and shorted wire pinched wire Replace Float switch if the wire is abnormal OK Check Point 3 Check Drain Hose Check Drain Hose If there is Hose clogging Please clear the clog 02 17 Indicate or Display Error code 53 Outdoor unit No indication Check Point 4 Check Controller PCB and Drain Pump If drain pump is not r...

Page 46: ...1 1 Reset Power Supply and operate Does Error indication show again Check Point 1 2 Check external cause Check if temporary voltage drop was not generated Check if momentary open was not generated Check if ground is connection correctly or there are no related cables near the power line Change Main PCB Access to EEPROM failed due to some cause after outdoor unit started 02 18 Indicate or Display E...

Page 47: ... the power on again Error displayed again Check Point 1 2 External cause Check if temporary voltage drop was not generated Check if temporary open was not generated Check if ground is connected correctly or there are no related cables near the power line Check Point 2 Check the wiring Connector and wiring connection state check Cable open check Check Point 3 Replace Main PCB Replace Outdoor unit M...

Page 48: ...t 1 Check external cause at Indoor and Outdoor Voltage drop or Noise Instant drop Check if there is a large load electric apparatus in the same circuit Momentary power failure Check if there is a defective contact or leak current in the power supply circuit Noise Check if there is any equipment causing harmonic wave near electric line Neon bulb or electric equipment that may cause harmonic wave Ch...

Page 49: ... error Outdoor unit Main PCB 1 Outdoor unit Main PCB failure When the signal from FO terminal of IPM is L 0V while the compressor stops Check Point 1 Replace Main PCB Replace Outdoor unit Main PCB Error code 65 Outdoor unit No indication 2 21 Trouble shooting 20 AMP Air Conditioning www ampair co uk sales ampair co uk ...

Page 50: ...t 2 Check the thermistor Thermistor characteristics check Disconnect the thermistor from the PCB and check For the thermistor characteristics refer to the Service Parts Information 8 Check Point 3 Check voltage of Main PCB DC5 0V Main PCB CN71 3 4 voltage value 5V Remove the thermistor from Main PCB check the voltage If the voltage does not appear replace Main PCB and execute the check operation a...

Page 51: ...nnect the thermistor from the PCB and check For the thermistor characteristics refer to the Service Parts Information 8 Check Point 3 Check voltage of Main PCB DC5 0V Main PCB CN73 1 3 voltage value 5V Remove the thermistor from Main PCB check the voltage If the voltage does not appear replace Main PCB and execute the check operation again 02 23 Trouble shooting 22 Detective Actuators Detective de...

Page 52: ...hermistor characteristics refer to the Service Parts Information 8 02 24 Heat Ex Outlet Temp Thermistor Error Trouble shooting 23 Detective Actuators Detective details OUTDOOR UNIT Error Method Forecast of Cause Indicate or Display Error code 73 Outdoor unit No indication DC Check Point 3 Check voltage of Main PCB DC5 0V Main PCB CN71 1 2 voltage value 5V Remove the thermistor from Main PCB check ...

Page 53: ...rom the PCB and check For the thermistor characteristics refer to the Service Parts Information 8 02 25 Trouble shooting 24 Detective Actuators Detective details OUTDOOR UNIT Error Method Forecast of Cause Indicate or Display Error code 74 Outdoor unit No indication OK DC Check Point 3 Check voltage of Main PCB DC5 0V Main PCB CN70 1 3 voltage value 5V Remove the thermistor from Main PCB check the...

Page 54: ...ble shooting 25 Detective Actuators Detective details OUTDOOR UNIT Error Method Forecast of Cause If this error is displayed replace Main PCB Indicate or Display Error code 77 Attention This unit does not have a heat sink themistor In this case replace Main PCB Outdoor unit No indication AMP Air Conditioning www ampair co uk sales ampair co uk ...

Page 55: ...ant drop Check if there is a large load electric apparatus in the same circuit Momentary power failure Check if there is a defective contact or leak current in the power supply circuit Noise Check if there is any equipment causing harmonic wave near electric line Neon bulb or electric equipment that may cause harmonic wave Check the complete insulation of grounding Check Point 1 1 Reset Power Supp...

Page 56: ...r and wiring connection state check Cable open check Check Point 2 Check the high pressure switch characteristics Switch characteristics check For the characteristics of high pressure switch refer to below Check Point 3 Replace Main PCB Change Main PCB and execute the check operation again 02 28 Pressure Sensor Error Type of contact Characteristics of pressure switch C H Pressure Pressure switch 1...

Page 57: ...se of ambient temperature 2 Main PCB 3 Inverter compressor failure lock winding short Protection stop by overcurrent generation after inverter compressor start processing completed generated consecutively 10 times The number of generations is reset if the start up of the compressor succeeds No obstructions in air passages Heat exchange fins clogged Outdoor unit fan motor check Ambient temperature ...

Page 58: ...ting the removed connector or mis wiring reset the power Refer to PARTS INFORMATION 2 For Compressor Terminal Main PCB While running the compressor if the detected rotor location is out of phase with actual rotor location more than 105 the compressor stops After the compressor restarts if the same operation is repeated within 40sec the compressor stops again If and repeats 5 times the compressor s...

Page 59: ...utdoor unit circuit diagram and the voltage Measure at Main PCB side connector If the voltage is not correct replace Main PCB When outdoor fan rotation speed is less than 100rpm in 20 seconds after fan motor starts fan motor stops After fan motor restarts if the same operation within 60sec is repeated 3 times in a row compressor and fan motor stops If and repeats 5 times in a row compressor and fa...

Page 60: ...K OK Check Point 4 Replace Main PCB If Check Point 1 3 do not improve the symptom replace Main PCB Check Point 2 Check thermistor of Indoor unit Isn t it fallen off the holder Is there a cable pinched Check characteristics of thermistor Refer to Trouble shooting 13 14 If defective replace the thermistor Indoor Unit Controller PCB Circuit Heat Exchanger Temperature Thermistor Room Temperature Therm...

Page 61: ...Check the outdoor unit fan heat exchanger Check for foreign object at heat exchanger Check if fan can be rotated by hand Motor check PARTS INFORMATION 5 Check Point 2 Check the EEV strainer Check Point 5 Check the refrigerant amount Leak check EEV open Strainer clogging check before and after EEV ACM oil return Refer to Service Parts Information 3 Check Point 2 Check the EEV strainer If the 3 way ...

Page 62: ...on Check Point 1 Check if 3 way valve gas side is open EEV open Strainer clogging check before and after EEV ACM oil return Refer to Service Parts Information 3 Check Point 2 Check the EEV strainer EEV open Strainer clogging check before and after EEV ACM oil return Refer to Service Parts Information 3 Check Point 2 Check the EEV strainer If the 3 way valve gas side was closed open the 3 way valve...

Page 63: ...heck if there is any equipment causing harmonic wave near electric line Neon bulb or electric equipment that may cause harmonic wave Check the complete insulation of grounding 02 35 2 3 TROUBLE SHOOTING WITH NO ERROR CODE Check Point 3 Check Electrical Components YES YES OK NO Check the voltage of power supply Check if AC198 264V appears at Outdoor Unit Terminal L N Check Varistor in Filter PCB If...

Page 64: ... drop Check if there is a large load electric apparatus in the same circuit Momentary power failure Check if there is a defective contact or leak current in the power supply circuit Noise Check if there is any equipment causing harmonic wave near electric line Neon bulb or electric equipment that may cause harmonic wave Check the complete insulation of grounding Check the voltage of power supply C...

Page 65: ... check correct followings Is there loose or removed communication line of Indoor Unit and Outdoor Unit Instant drop Check if there is a large load electric apparatus in the same circuit Momentary power failure Check if there is a defective contact or leak current in the power supply circuit Noise Check if there is any equipment causing harmonic wave near electric line Neon bulb or electric equipme...

Page 66: ...w route Check clogged Heat Exchanger Is the Valve open Is capacity of Indoor Unit fitted to Room size Any windows open Or direct sunlight Check connection pipe specified pipe length Pipe diameter Check any loose or removed communication line If there is an abnormal condition correct it by referring to Installation Manual or Data Technical Manual Check if Strainer is clogged Refer to the figure at ...

Page 67: ...mal Is Fan broken or deformed Is the screw of Fan loose Is there any object which obstruct the Fan rotation Is Main Unit installed in stable condition Is Fan Guard installed normally Check if vibration noise by loose bolt or contact noise of piping is happening Is Compressor locked Check Compressor PARTS INFORMATION 1 2 Water Leaking 1 Erroneous installation 2 Drain hose failure Diagnosis method w...

Page 68: ... or less oil Replace Compressor Replace Compressor Replace Compressor Stops soon after starting up Is there open or loose connection cable Is Gas Pipe Valve open Low Pressure is too low Check if Refrigerant is leaking Recharge Refrigerant Check if Strainer is clogged PARTS INFORMATION 3 If there is no failure the defect of Compressor can be considered Compression part broken or valve defective Abn...

Page 69: ... loose or incorrect wiring Check winding resistance of each terminal If the resistance value is 0 or infinite replace Compressor If the symptom does not change with above Check 1 2 replace Main PCB 02 41 Resistance Value 0 818 at 20 C Main PCB W V W 7 U RED WHITE BLACK Compressor S V R U RED T W BLACK Terminal cover opened WHITE W 8 W 9 AMP Air Conditioning www ampair co uk sales ampair co uk ...

Page 70: ...pen cable Remove connector check each winding resistance of Coil If Resistance value is abnormal replace EEV Remove Connector and check Voltage DC12V If it does not appear replace Main PCB Turn on Power and check operation noise If an abnormal noise does not show replace Main PCB When Valve is closed it has a temp difference between Inlet and Outlet If it is open it has no temp difference between ...

Page 71: ...rth terminal GND Control voltage Vcc Speed command Vsp 7 Brown Feed back FG Pin number wire color Terminal function symbol 1 Red 2 4 Black 5 White 6 Yellow DC voltage Vm No function 3 No function GND Control voltage Vcc Speed command Vsp 7 Brown Feed back FG SERVICE PARTS INFORMATION 4 Indoor unit fan motor 02 43 Check Point 1 Check rotation of Fan Rotate the fan by hand when operation is off Chec...

Page 72: ...30 40 50 60 70 80 90 100 110 120 168 6 129 8 100 9 79 1 62 6 49 8 40 0 26 3 17 8 12 3 8 7 6 3 4 6 3 4 2 6 2 0 27 8 21 0 16 1 12 4 9 6 7 6 6 0 4 8 3 8 2 5 1 7 1 2 105 4 58 2 44 0 33 6 25 9 20 2 15 8 12 5 10 0 8 0 5 3 3 6 27 4 20 7 15 8 12 2 9 5 7 5 5 9 4 7 3 8 2 5 1 7 1 2 0 8 0 6 0 4 0 3 Applicable Thermistors Discharge temp TH Compressor temp TH Outdoor temp TH Heat sink temp TH Heat exchanger TH ...

Page 73: ...3 3 17 Suenaga Takatsu ku Kawasaki 213 8502 Japan Dec 2015 Printed in Japan AMP Air Conditioning www ampair co uk sales ampair co uk ...

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