E: A1. Discharge Temperature Error (Outdoor Unit) - Fujitsu GENERAL ASHG18KMTE Service Manual

2-31. E: A1. Discharge temperature error (Outdoor unit)

Indicator Indoor unit
Outdoor unit main PCB
Detective actuator
Discharge temperature thermistor
Forecast of cause
Check point 1. Check if valve is open
If the valve is closed, open the valve and check the operation.
NOTE: For cooling operation, check gas valve.
For heating operation, check liquid valve.
Check point 2. Check any of the Electronic Expansion Valve (EEV), capillary tube, or strainer, or all
• Check if EEV open or there is a capillary tube defect.
Refer to outdoor unit Electronic Expansion Valve (EEV) or Capillary tube in
mation" on page 03-48.
• Check the strainer clogging.
If EEV, Capillary tube or Strainer is defective, replace it.
Check point 3. Check if gas leak or less gas
Measure gas pressure, if there is a leak, correct it.
If recharging refrigerant, make sure to perform vacuuming and recharge the specified amount.
Check point 4. Check the discharge thermistor
• Isn't it fallen off the holder?
• Is there a cable pinched?
Check characteristics of thermistor (Refer to
page 03-26). If defective, replace the thermistor.
Check point 5. Check the outdoor unit fan and heat exchanger
• Is there anything obstructing the air distribution circuit?
• Is there any clogging of outdoor heat exchanger?
• Is the fan rotating? (Check by hand and if it is locked, replace the motor.)
• Check outdoor fan motor.
If the fan motor is defective, replace it.
2-31. E: A1. Discharge temperature error (Outdoor unit)
Operation indicator
Timer indicator
Economy indicator
Error code
1. →hen the discharge temperature becomes higher
than 110 °C, the compressor stops.
2. After the compressor restarts, if the same operation
is repeated, the compressor stops permanently.
"E: 71. Discharge thermistor error (Outdoor unit)"
- (03-37) -
10 time flash
1 time flash
Continuous flash
E: A1
Valve is close
EEV failure
Gas leak, less
Discharge thermistor failure
Outdoor fan operation failure
Outdoor heat exchanger clogged
"Service parts infor-
2. Troubleshooting with error code
on