Fujitsu AOCG040LBTA, Service Instruction

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<Cooling operation>
OK
OK
OK
OK
OK
<Heating operation>
Outdoor unit Main PCB
Discharge temperature thermistor
"Protection stop by "discharge temperature 110 °C
during compressor operation"" generated 2 times within 24 hours.
Check Point 1 : Check if 3-way valve(gas side) is open.
Discharge thermistor characteristics check.
(Check by disconnecting thermistor from PCB.)
* For the characteristics of the thermistor, refer to the "Trouble shooting 14".
Check Point 4 : Check the discharge thermistor
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 5 : Check the refrigerant amount
Leak check
If the 3-way valve(gas side) was closed, open the
3-way valve(gas side) and check operation.
02-23
Check Point 1 : Check if 2-way valve(liquid side) is open.
If the 2-way valve(liquid side) was closed, open the
2-way valve(liquid side) and check operation.
OK
Detective Actuators:
Detective details:
Forecast of Cause :
Trouble shooting 21
OUTDOOR UNIT Error Method:
Discharge temp. error
1. 3-way valve not opened 2. EEV defective, strainer clogged
3. Outdoor unit operation failure, foreign matter on heat exchanger
4. Discharge temperature thermistor failure 5. Insufficient refrigerant
6. Main PCB failure
EEV open?
Strainer clogging check
(Refer to PARTS INFORMATION 3)
Check Point 2 : Check the EEV, strainer
EEV open?
Strainer clogging check
(Refer to PARTS INFORMATION 3)
Check Point 2 : Check the EEV, strainer
Indicate or Display:
Outdoor Unit : Continuously lighting
Indoor Unit : Operation lamp: 10 time Flash, Timer lamp: 1 time Flash
Economy lamp : Continuous flash.
ERROR CODE : [E : A1]