Hall Ic Check; Refrigerant System Check - Daikin FTK25JVE9 Service Manual

Check
6.1.9

Hall IC Check

Check No.16 1. Check the connector connection.
2. With the power ON, operation OFF, and the connector connected, check the following.
Failure of (1) $ faulty PCB $ Replace the PCB.
Failure of (2) $ faulty hall IC $ Replace the fan motor.
Both (1) and (2) result $ Replace the PCB.
6.1.10

Refrigerant System Check

Check No.17
92
∗
Output voltage of about 5 V between pins 1 and 3.
∗
Generation of 3 pulses between pins 2 and 3 when the fan motor is operating.
Refrigerant system check (gas
leaking, short of gas)
Is
the temperature
of 4 way valve suction pipe
abnormaly high?
NO
Is any moisture
found in sight glass.
NO
Check for gas leaks. See the
section on insufficient gas
detection.
Is the
discharge thermistor
disconnected from
the holder?
NO
YES
YES
Conduct the check after operating the
equipment for a sufficient length of time.
YES
Connect thermistor to holder properly.
Faulty 4 way valve, replace 4 way
valve.
Conduct vacuum drying.
Replace the refrigerant.
Service Diagnosis
Si04-115
(R1079)