Fujitsu AO*G24LFLAO*G24LFCC, Service Instruction

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<Cooling operation>
OK
OK
OK
OK
OK
OK
<Heating operation>
Compressor temperature thermistor
Outdoor unit Main PCB "Protection stop by
"compressor temperature 110degC(24L), 108degC(30L) during
compressor operation"" generated 2 times within 24 hours.
Check Point 1 : Check if 3-way valve(gas side) is open.
Discharger thermistor characteristics check
(Check by disconnecting thermistor from PCB.)
* For the characteristics of the thermistor, refer to the "Trouble shooting 12".
Check Point 4 : Check the discharge thermistor
EEV open?
Strainer clogging check
(Refer to PARTS INFORMATION 3)
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 5)
Check Point 2 : Check the EEV, strainer
Check Point 5 : Check the refrigerant amount
Leak check
EEV open?
Strainer clogging check
(Refer to PARTS INFORMATION 3)
Check Point 2 : Check the EEV, strainer
If the 3-way valve(gas side) was closed, open the
3-way valve(gas side) and check operation.
02-24
Check Point 1 : Check if 3-way valve(liquid side) is open.
If the 3-way valve(liquid side) was closed, open the
3-way valve(liquid side) and check operation.
OK
Detective Actuators:
Detective details:
Forecast of Cause :
Trouble shooting 22
OUTDOOR UNIT Error Method:
Compressor Temp. Error
Indicate or Display:
Refer to error code table.
1. 3-way valve not opened 2. EEV defective, strainer clogged
3. Outdoor unit operation failure, foreign matter on heat exchanger
4. Compressor temperature thermistor
failure
5. Insufficient refrigerant
6. Main PCB failure
Check Point 6 : Replace Main PCB
If Check Point 1- 5 do not improve the symptom, replace Main PCB.