Fujitsu AMUG24LMAS, Service Manual

Page: 89 / 200

Compressor temperature error
OK
OK
OK
OK
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
Compressor temperature thermistor
Compressor temperature thermistor characteristics check.
(Check by disconnecting thermistor from PCB)
Check Point 4 : Check the compressor temperature thermistor
Check Point 3 : Outdoor unit fan, heat-exchanger check
Check for foreign object at heat-exchanger
Check if fan can be rotated by hand.
Motor check
Check Point 5 : Check the refrigerant amount
Leak check
03-41
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)
Check Point 2 : Check the EEV, strainer
EEV open?
Strainer clogging check
(before and after EEV, ACM, oil return)
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.
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
"Protection stop
by compressor temperature
≥
230°F (110°C)
during compressor operation"
generated 2 times within 24 hours
Troubleshooting 30
Indicate or Display:
Detective actuators:
Detective details:
Forecast of cause:
Indoor unit
Operation lamp: 10 times Flash,
Timer lamp : 3 times Flash
Wired remote control
Error code : [E : A3]
n: n times blinking : Light ON : Light OFF
Mode Error
2 10
A B F E D C
3
Outdoor unit (AOUG36/48LMAS1)
(Parts infomation 7)
°F (115°C)) (36/48 models 226.4