Fujitsu Siemens Computers AB* G45LRTA Service Instruction Download Page 79

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SERVICE PARTS INFORMATION 9

Suction Pressure Sensor

Check Point : Check Voltage from Main PCB

With the connector connected to the PCB,

measure the voltage between CN91:3-4 of the Main PCB.

1. Suction Pressure Sensor

Characteristics of pressure sensor

3.5

1.7

0.5

t [

]

Pressure [MPa]

02-43

WHITE

PRESSURE

SENSOR

(LOW)

BLACK

RED

CN91

0.85

2.0

Summary of Contents for AB* G45LRTA

Page 1: ...ROOM AIR CONDITIONER Cassette type Duct type Ceiling type Models Indoor unit Outdoor unit AU G45LRLA AR G45LMLA AR G45LHTA AB G45LRTA AU G54LRLA AR G54LHTA AO G45LETL AO G54LETL INVERTER SERVICE INSTRUCTION R410A ...

Page 2: ...13 AUTO RESTART 01 16 1 14 PUMP DOWN 01 17 1 15 COMPRESSOR PREHEATING 01 18 1 16 10 C HEAT OPERATION For AB type 01 18 1 20 VARIOUS PROTECTIONS 01 22 1 21 COMPRESSOR STOP CONTROL 01 24 1 19 OFF DEFROST OPERATION CONTROL 01 21 2 1 ERROR DISPLAY 2 TROUBLE SHOOTING 2 2 TROUBLE SHOOTING WITH ERROR CODE 2 3 TROUBLE SHOOTING WITH NO ERROR CODE 2 4 SERVICE PARTS INFORMATION 02 01 02 30 02 04 02 35 1 18 D...

Page 3: ...1 DESCRIPTION OF EACH CONTROL OPERATION R410A Cassette Duct Ceiling type INVERTER ...

Page 4: ...s 16rps 16rps 16rps 93rps 90rps 85rps 100rps AU G45LRLA AR G45LMLA AB G45LRTA AR G45LHTA AU G54LRLA AR G54LHTA Hi Me Lo Qu 93rps 93rps 78rps 73rps 75rps 75rps 68rps 56rps 68rps 68rps 56rps 47rps 44rps 44rps 44rps 29rps 100rps 100rps 85rps 76rps 78rps 78rps 73rps 62rps 73rps 73rps 62rps 50rps 44rps 44rps 44rps 29rps 85rps 85rps 78rps 68rps 77rps 77rps 68rps 62rps 76rps 76rps 68rps 56rps 90rps 90rps...

Page 5: ... set temperature the compressor operation frequency will attain to maximum performance If the room temperature is higher 2 5 C than a set temperature the compressor will be stopped When the room temperature is between 2 5 C to 3 C of the setting temperature the compressor frequency is controlled within the range shown in Table2 Table 2 Compressor Frequency Range 01 02 minimum frequency maximum fre...

Page 6: ...C Ts 1 5 C Operating frequency 44rps X zone 0rps Y zone Room Room temperature temperature X zone Y zone AU G45LRLA AR G45LMLA AB G45LRTA AR G45LHTA AU G54LRLA AR G54LHTA Compressor ON OFF Indoor fan Setting air flow OFF 10 30 60 180 60 180 60 10 30 sec S Lo Compressor ON OFF Lo OFF 30 180 120 180 30 sec Indoor fan ON 5 30 5 Fig 3 2 Indoor Fan Control for AR G45 54LHTA Fig 3 1 Indoor Fan Control fo...

Page 7: ... the room temperature reaches set temperature 2 C during Dry mode operation returns to Cooling When Heating was selected at the same operation as HEATING OPERATION of page 01 02 is performed When the compressor was stopped for 6 consecutive minutes by the temperature control function after the Cooling Auto Dry or Heating mode was selected at above operation is switched to Monitoring and the operat...

Page 8: ...state for 6 minutes or longer System stops or operation 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 Operation mode of outdoor unit Cooling or Dry YES NO Operation mode of outdoor unit Heating YES NO YES Outdoor temperature 25 C NO YES YES NO YES YES ...

Page 9: ...0 300 480 270 Heating Cooling Fan Dry S Lo Note during Economy operation and operation mode is Fan air flow is 1 step downs Hi Me Me Lo Lo Quiet Quiet Soft Quiet AB G45LRTA Operation mode Air flow mode Speed rpm Hi Me Me Lo Quiet Cool air prevention Hi Me Lo Quiet Soft Quiet 1200 1100 1000 830 680 500 1200 1000 830 680 500 680 250 Heating Cooling Fan Dry S Lo AR G45LMLA Operation mode Air flow mod...

Page 10: ...airflow of Cool operation modes Lo Me Hi as shown in Table 5 Fig 6 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 TR Ts 2 5 C TR Ts 1 5 C Hi mode Me mode Lo mode 1 When the room temperature rises When the room temperature drops TR Ts 1 C 2 C TR Ts 1 C TR ...

Page 11: ...mode Fig 8 Cool Air Prevention Control AU G45 54LRLA AB G45LRTA AR G45LMLA Hi or setting fan mode Lo or setting fan mode 37 C 29 C 32 C 24 C Indoor heat exchanger temperature rises Indoor heat exchanger temperature drops Cool air prevention S Lo S Lo 42 C 30 C 34 C Indoor heat exchanger temperature rises Indoor heat exchanger temperature drops Hi Me or setting fan mode Lo or setting fan mode Lo or...

Page 12: ...able 6 Fan speed of the outdoor unit AO G45LETL AO G54LETL After operating the defrost control function on heating mode except economy operation its speed becomes 900rpm Upper 880rpm Lower regardless of the compressor speed However it returns to the normal speed control when the defrosting operation does not function for 240 minutes after releasing the defrost operation or when the outdoor tempera...

Page 13: ...Y 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 39 90 57 68 180 420 85 rps Upper limit speed sec 480 Elapsed time 39 200 57 68 700 840 85 rps Upper limit speed sec 1010 Elapsed time 39 90 57 68 210 270 85 rps Upper limit speed sec 300 Elapsed time Ta Outdoor temperature Normal start up Immediate start up af...

Page 14: ...per day Use this timer function to set operating time for each day of the week Operation mode The operating time can be set in 30 min increments only The OFF time can be carried 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 mo...

Page 15: ...etting day Preceding day Next day Setting day The SET BACK timer only changes the set temperature for 7 days it cannot be used to start or stop air conditioner operation The SET BACK timer can be set to operate up to two times per day but only one temperature setting can be used During the COOL DRY mode the air conditioner will operate at a minimum of 18 C even if the SET BACK temperature is set t...

Page 16: ...EEP TIMER The program timer 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 ...

Page 17: ...tion In the COOLING operation 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 i...

Page 18: ...hanger sensor the outdoor heat exchanger sensor and the outdoor temperature sensor Pulse range 53 480 pulse 1 Pulse range of EEV 2 The EEV is set up at 480 pulses when the compressor is stopped 3 Initialization Input of 528 pulses toward closing direction is operated under the following condition When the power is turned on 4 hours has passed since the last initialization and 3 minutes has passed ...

Page 19: ...ion contents at that time are memorized and when power is recovered operation is automatically resumed with the memorized operation contents When the power 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 Set temperature Set air flow Timer mode and timer time ...

Page 20: ...tes 4 LED display will change as shown below about 3 minutes after the compressor starts Fully close the 3 way valve on the liquid pipe side at this stage If the valve on the liquid pipe side is not closed the pump down cannot be performed 5 When LED display changes as shown in the below figure close the 3 way valve on the gas pipe side tightly If the valve on the gas pipe side is not closed refri...

Page 21: ...ses to 26 C or greater preheating is ended 1 16 10 C HEAT OPERATION For AB type 10 C HEAT operation functions by pressing 10 C HEAT button on the remote controller 10 C HEAT operation is almost the same operation as below settings Mode Heating Setting temperature 10 C Fan mode AUTO Table8 1 17 ECONOMY OPERATION The ECONOMY operation functions by pressing ECONOMY button on the remote controller The...

Page 22: ... following Table 10 11 and 12 From 2nd and later defrost after starting operation Less than 35 minutes More than 35 minutes Does not operate Compressor integrating operation time Table 10 Condition of 1st defrost operation 1st defrost after starting operation Compressor integrating operation time Less than 22 minutes More than 22 minutes More than 62 minutes Does not operate Outdoor heat exchanger...

Page 23: ...or integrating operation Over 62 minutes Outdoor heat exchanger temperature Below 9 C Outdoor heat exchanger temperature Below 5 C Compressor integrating operation Over 35 minutes 2nd and later defrost Compressor OFF Outdoor fan motor OFF 30 sec later 4 way valve OFF 36 sec later compressor ON Compressor integrating operation Over 240 minutes Integrating defrost Constant monitoring Defrost Indicat...

Page 24: ...30 minutes and compressor operation contiguous time lasts for more than 10 minutes OFF Defrost Flow Chart Heating operation stop Outdoor heat exchanger temperature Below 4 C and Compressor integrating operation Over 30 minutes and Compressor contiguous operation Over 10 minutes Defrost start Defrost Indicater Operation lamp 7 sec ON 2 sec OFF Outdoor heat exchanger temperature Over 10 C or Compres...

Page 25: ...C T0 46 C 46 C T0 40 C 40 C T0 38 C 38 C T0 31 C 31 C T0 19 C 19 C T0 13 C 13 C T0 7 C 7 C T0 0 C 0 C T0 5 C 5 C T0 10 C 10 C T0 15 C 850 800 780 750 750 700 540 520 360 340 290 270 480 0 400 0 350 0 280 0 12 5 12 0 6 5 6 0 5 0 4 5 8 0 7 5 9 0 8 5 9 0 8 5 10 0 9 5 10 0 9 5 10 0 9 5 6 0 5 5 10 5 10 0 12 5 12 0 12 0 11 5 10 0 9 5 12 5 12 0 13 0 12 5 14 5 14 0 15 5 15 0 11 5 11 0 11 0 10 5 13 5 13 0 ...

Page 26: ...mode After the compressor start up and 10 minutes has passed After the compressor start up and 1 minute has passed a The detected value of pressure sensor is 0 02MPaG or less continues for 5 minutes the compressor is stopped b When 7 minutes has passed and low pressure sensor detects value is more than 0 05MPaG after the protection stop by a the compressor restarts c When the protection a operates...

Page 27: ...nsor is lower than temperature in the table below the compressor is stopped Table 18 Operation temperature of compressor stop control Operation temperature Temperature The fan motor for Fresh Air is operated in synchronization with the indoor fan operation as shown in Fig 14 1 22 FRESH AIR CONTROL Fig 14 Fresh Air control ON OFF ON OFF Fan motor Indoor unit Control signal for Fresh Air 12V Condens...

Page 28: ...RATION ECONOMY OPERATION and PEAK CUT OPERATION are effective and the outdoor unit operates by lowest current of them However during the DEFROST OPERATION the compressor operates by the speed for DEFROST OPERATION Table 19 Detail of Low Noise Operation 540 520 570 550 540 520 570 550 540 520 570 550 68 75 54 62 48 54 75 85 58 68 48 54 The performance drops when operating in the LOW NOISE OPERATION...

Page 29: ... the float switch turns OFF less than 3 minutes the unit starts 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...

Page 30: ... Peak cut mode when local setting is activated Lighting pattern of L4 L5 and L6 indicates peak cut level SW1 SW2 SW3 SW4 SW5 1 2 3 4 5 LED DISPLAY Various settings can be adjusted by changing Push switches on the board of the outdoor unit Excerpt from the INSTALATION MANUAL Switch Function or operation method SW1 To switch between Local setting and Error code display SW2 To switch between the indi...

Page 31: ...ion Power Mode Error L1 L2 L6 L5 L4 L3 1 2 3 4 During status display press the MODE SWITCH 1 time Status display Outdoor unit is stopping and no error When the EXIT SWITCH is pressed this mode ends and returns to the status display Selecting display items can be done by pressing the SELECT SWITCH Return to Procedure 3 Press the ENTER SWITCH Data is displayed by lighting LED Refer to Table 23 When ...

Page 32: ...sure sensor value Low pressure range 0 2 1MPa Pressure sensor value High pressure range 2 1 4 2MPa Check the Low Pressure Range if it is displayed 2 1 Check the High Pressure Range if it is displayed 1 81 2 1 0 1 15 16 30 31 45 46 60 61 75 76 90 90 95 0 1 150 151 300 301 450 451 600 601 750 751 900 901 0 1 150 151 300 301 450 451 600 601 750 751 900 901 0 1 80 81 160 161 240 241 320 321 400 401 48...

Page 33: ...ischarge Temperature 30 120 C Heat exchanger Temperature Middle 30 80 C Current 0 10A Compressor Accumulated Time H 15 15 5 5 5 5 15 15 25 25 35 35 45 45 55 55 65 65 75 75 85 85 95 95 105 105 115 115 53 53 55 55 57 57 59 59 61 61 63 63 65 65 0 0 0 0 1 5 1 5 3 0 3 0 4 5 4 5 6 0 6 0 7 5 7 5 9 0 9 0 0 0 10000 10000 20000 20000 30000 30000 40000 40000 50000 50000 60000 60000 7 8 9 01 30 Round up by 1h...

Page 34: ... SELECT SWITCH Return to Procedure 3 Press the ENTER SWITCH Error code is displayed by lighting LED Refer to Table 26 When the POWER MODE LED blinking 2 times press the ENTER SWITCH Light ON Light OFF Blinking 2 2 Times Blinking n n Times Blinking 1 27 3 Error history mode Error L1 L2 L6 L5 L4 L3 2 2 2 2 2 5 Press the SELECT SWITCH and adjust to DISPLAY ITEM from L1 to L3 that you want to confirm ...

Page 35: ... is off and will normal display Error Contents Power Mode Error Serial forward transfer error after operation 2 2 2 2 2 2 2 2 2 2 2 1 1 1 15 Times Blinking 15 Table 26 Error Code L1 L2 L6 L5 L4 L3 IPM Error Indoor Unit Error Inverter Error Over Current Error Discharge Thermistor Error Outdoor Thermistor Error Heat Sink Thermistor Error Current sensor Error Pressure sensor Error Heat Ex Liquid Midd...

Page 36: ......

Page 37: ...2 TROUBLE SHOOTING R410A Cassette Duct Ceiling type INVERTER ...

Page 38: ...nts Trouble shooting 17 18 19 20 21 22 23 24 25 26 Error Code 84 86 94 95 97 98 99 A1 A3 A5 Over Current Error Discharge Thermistor Error Outdoor Thermistor Error Heat Sink Thermistor Error Current sensor Error Pressure sensor Error Heat Ex Liquid Outlet Thermistor Error Compressor Thermistor Error When Er in Temperature Display is displayed inspection of the air conditioning system is necessary P...

Page 39: ... SET TEMPERATURE buttons simultaneously for 3 seconds or more to start the self diagnosis 4 Press the SET TEMPERATURE buttons simultaneously for 3 seconds or more or there is no key input for 60 seconds to stop the display 3 Press the SET TEMPERATURE button to select the error history number SU MOTU WETH FR SA Error code Error history number 0 1 2 3 4 5 6 7 F E d c b A 9 8 Lower Raise ...

Page 40: ...n 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 264V AC240V 10 appears at outdoor unit terminal L N When the indoor unit cannot receive the serial signal from Outdoor unit more than 2minutes after power ON or t...

Page 41: ...2 Check connection Check any loose or removed connection line of between indoor unit 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 AC198...

Page 42: ...k correct the followings Check the connection of terminal between Wired Remote Controller and indoor unit and check if there is a disconnection of the cable When the indoor unit cannot properly receive the signal from Wired Remote Controller for 1 minute or more 02 06 Refer to error code table If it is DC12V Remote Control is failure Controller PCB is normal Replace Remote Control If it is DC 0V C...

Page 43: ...le OK OK Check Point 2 Check connection of Connector Check if connector is removed 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 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 ther...

Page 44: ...9 33 6 4 35 5 3 Resistance value k OK OK 02 08 Trouble shooting 5 INDOOR UNIT Error Method Indicate or Display Indoor Room Thermistor Error Refer to error code table Temperature C Temperature C 0 40 45 5 44 0 58 2 10 5 10 15 20 25 30 35 Resistance value k Check Point 3 Check voltage of Controller PCB DC5 0V Make sure circuit diagram of indoor unit and check terminal voltage at thermistor DC5 0V If...

Page 45: ...isplay Indoor Heat Ex Thermistor Error Refer to error code table 31 7 39 6 49 7 62 9 80 3 103 3 134 2 176 0 17 1 20 8 25 6 Resistance value k Temperature C Temperature C 0 40 45 50 14 1 55 11 6 60 10 4 63 5 10 1131 9 30 579 6 20 312 3 10 233 2 5 15 20 25 30 35 Resistance value k OK Check Point 3 Check voltage of Controller PCB DC5 0V Make sure circuit diagram of indoor unit and check terminal volt...

Page 46: ...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 When the condition that actual frequency of Indoor Fan is below 1 3 of target frequency is continued more...

Page 47: ...Cause 1 Float switch failure 2 Shorted connector wire 3 Controller PCB failure 4 Drain pump failure 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 Check Point 4 Check Controller PCB If Check Point 1 3 do not improve the symptom change Controller PCB and execute the check operation again At...

Page 48: ...inding open 3 Motor protection by surrounding temperature rise 4 Power Supply PCB failure 5 Indoor unit fan motor failure 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 r...

Page 49: ...mporary 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 Power supply to Filter PCB to Inverter PCB Connector and wiring connection state check Cable open check Replace Filter PCB and Inverter PCB Check Point 1 1 Turn the power on again Error displayed again Check Point 3 Replace Filter PCB INV and Inver...

Page 50: ... Outdoor Fan Heat Exchanger Is there anything obstructing the air distribution circuit Is there any clogging of Outdoor Heat Exchanger Is the Fan rotating by hand when operation is off If the Fan Motor is locked replace it Check Outdoor Fan Motor Refer to Trouble shooting 21 22 If the Fan Motor is failure replace it Check Point 4 Check Compressor PARTS INFORMATION 2 Check Compressor If Check Point...

Page 51: ...tion state check Cable open check Check Point 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 CN62 1 2 voltage value 5V Remove the thermistor from Main PCB check the voltage If the voltage does not appear replac...

Page 52: ...ristics 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 CN62 3 4 voltage value 5V Remove the thermistor from Main PCB check the voltage Compressor temperature thermistor CN62 3 4 If the voltage does not appear replace Main PCB and execute the check operation ag...

Page 53: ...heck Point 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 CN63 1 2 voltage value 5V Remove the thermistor from Main PCB check the voltage Heat exchanger outlet temperature thermistor CN63 1 2 If the voltage doe...

Page 54: ...Check Point 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 CN61 1 3 voltage value 5V Remove the thermistor from Main PCB check the voltage Outdoor temperature thermistor CN61 1 3 If the voltage does not appear ...

Page 55: ...B Heat sink temperature thermistor Built in IPM open short detected 1 Inverter PCB failure 02 19 Trouble shooting 16 Indicate or Display Detective Actuators Detective details OUTDOOR UNIT Error Method Forecast of Cause If this error is displayed replace Inverter PCB ...

Page 56: ...e 1 Defective connection of electric components 2 External cause 3 Main PCB failure 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 h...

Page 57: ...was detected Check Point 1 Check the high pressure switch connection state Connector 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 21 Pressure Sensor Erro...

Page 58: ...ssor 1 Outdoor unit fan operation defective foreign matter on hear exchanger excessive rise of ambient temperature 2 Main PCB 3 Inverter compressor failure lock winding short 4 Transistor PCB IPM failure 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...

Page 59: ...r 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 90 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 stops permanently Check Poi...

Page 60: ...nt 4 Check Output Voltage of Main PCB Check outdoor 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 a...

Page 61: ...nt 4 Check Output Voltage of Main PCB Check outdoor 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 a...

Page 62: ...is not proper replace 4 way valve OK 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 5 6 If defective replace the thermistor Indoor Unit Controller PCB Circuit Heat Exchanger Temperature ...

Page 63: ... return Refer to Service Parts Information 3 4 Check Point 3 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 7 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 Inf...

Page 64: ...t 5 Check the refrigerant amount Leak check 02 28 Cooling operation OK Heating operation 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 4 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 4 Check ...

Page 65: ...t ambient temperature Outdoor ambient temperature lower than operating range Outdoor unit EEV operation check Strainer not clogged Check Point 4 Check the outdoor unit EEV strainer clogging Indoor unit EEV operation check Strainer not clogged Check Point 2 Check the EEV strainer clogging Suction pressure sensor characteristics check For the characteristics of the suction pressure sensor PARTS INFO...

Page 66: ... 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 02 30 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 Ch...

Page 67: ... 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 Check if AC198 264V appear...

Page 68: ...owings 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 equipment that may cause h...

Page 69: ...ts that obstruct the air flow 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 clo...

Page 70: ...on grille and front panel normal 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 ho...

Page 71: ...mpressor due to clogged dirt 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 b...

Page 72: ...ck terminal connection of Compressor 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 36 Resistance Value 0 432 8 at 20 C R U RED S V WHITE T W BLACK IPM PCB TM303 TM304 TM305 RED WHITE BLACK Compressor Inverter PCB ...

Page 73: ...onnector Loose connector or open 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 ha...

Page 74: ...low 300 k replace Indoor fan motor and Controller PCB Pin number wire color Terminal function symbol 1 Brown 2 Yellow 3 White 4 Black 5 6 Red Feed back FG Speed command Vsp Control voltage Vcc Ground terminal GND No function DC voltage Vm Check Point 1 Check resistance of indoor fan motor Check each winding resistance of the motor If Resistance value is abnormal replace motor Lead wire color Resis...

Page 75: ...place it Check Point 2 Check resistance of Outdoor Fan Motor 1 or 2 Refer to below Circuit test Vm and GND terminal Vm DC voltage GND Earth terminal If they are short circuited below 300 k replace Outdoor fan motor and Main PCB Pin number wire color Terminal function symbol 1 Red 2 3 Black 4 White 5 Yellow 6 Brown DC voltage Vm No function Earth terminal GND Control voltage Vcc Speed command Vsp F...

Page 76: ...utput voltage of compressor stopping Active Filter Module is detective Replace Active Filter Module Terminal Resistance value L2 L1 L1 L2 P P Control Box N N IN IN IN IN Tester Tester Check the open or short circuit L2 P P N L2 L2 Check the diode 0 360k 720k 1 69M 20 360k 20 20 Ref value 1 1 88M Ref value 2 1 40M Ref value 1 2 28M Ref value 2 Terminal Resistance value Tester Tester 1 32M Ref value...

Page 77: ...de and measure the resistance between the following terminals Set the tester to the Diode mode and measure the voltage value between the following terminals Judge the result of as follows Judge the result of as follows TM301 P TM305 U TM304 V TM303 W TM302 N TM305 U TM304 V TM303 W P P P U V W N N N U V W U V W P P P U V W N N N Over 2k Including Over 2k Including Over 20k Including Terminal Teste...

Page 78: ...istor C 30 20 10 5 0 5 10 15 20 25 30 40 50 60 70 80 90 100 110 120 1013 1 531 6 292 9 221 1 168 6 129 8 100 9 79 1 62 5 49 8 40 0 26 3 17 8 12 3 8 7 6 3 4 6 3 4 2 6 2 0 95 6 50 3 27 8 21 0 16 1 12 4 9 6 7 6 6 0 4 8 3 8 2 5 1 7 1 2 0 8 0 6 0 4 224 3 115 2 62 3 46 6 35 2 26 9 20 7 16 1 12 6 10 0 8 0 5 2 3 5 2 4 1 6 1 2 Applicable Thermistors Discharge temp TH Comprssor temp TH Outdoor temp TH Heat ...

Page 79: ...m Main PCB DC With the connector connected to the PCB measure the voltage between CN91 3 4 of the Main PCB 1 Suction Pressure Sensor Characteristics of pressure sensor 3 5 1 7 0 5 0 Output DCV Pressure MPa DC 02 43 1 2 3 4 1 2 3 4 WHITE PRESSURE SENSOR LOW BLACK RED PS CN91 0 85 2 0 ...

Page 80: ......

Page 81: ...1116 Suenaga Takatsu ku Kawasaki 213 8502 Japan May 2013 Printed in Japan ...

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