Circulation Refrigerant Error - Fujitsu ASYA07LBCM Service Manual

Trouble shooting 24
OUTDOOR UNIT Error Method:
INDOOR UNIT

Circulation refrigerant error

Detective Actuators:
Indoor Unit Controller PCB Circuit
Heat Exchanger Temperature Thermistor
Room Temperature Thermistor
Forecast of Cause :
1. Valve is close 2. EEV failure
5. Outdoor Heat Exchanger clogged
< Cooling mode >
Check Point 1 : Check if Gas Valve is open
If it is not open, open it and check the operation.
OK
Check Point 2 : Check EEV and Strainer
Are EEV and Strainer open?
(Refer to PARTS INFORMATION 3)
>>If EEV or Strainer is defective, replace it.
OK
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.
OK
Check Point 4 : Check Outdoor FAN, 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.
Indicate or Display:
Refer to error code table.
Detective details:
If the following condition is detected, the compressor stops running.
- When the compressor runs for 20 minutes.
- When the difference between the "Indoor Heat Excanger
Temperature" and "Room Temperature" is within 4 deg C.
(cooling operation only)
3. Gas Leak, less 4. Outdoor Fan Operation failure
MPa MPa
02-27