Daikin F-Series Service Manual page 254

SiBE12-712
5.1.10 Inverter Units Refrigerant System Check
Check No.11
Refrigerant system check
Check for gas leaks.
See the section on insufficient gas
detection.
5.1.11 Capacitor Voltage Check
Check No.12 Before this checking, be sure to check the main circuit for short-circuit.
Service Diagnosis
Is
the discharge
thermister disconnected from
the holder?
NO
Is the temperature
of the four way valve suction pipe
abnormaly high?
NO
Is any moisture
found in sight glass?
NO
Checking the capacitor voltage
With the circuit breaker still on, measure the voltage according to the drawing. Be careful
never to touch any live parts.
DB1
LED5
S90
Thermistor
lead wire
YES
YES
YES
Conduct the check after operating the
equipment for a sufficient length of time.
LED A
S70 S80
Fan motor Four way valve
lead wire lead wire
Correct the problem.
Four way valve defective.
Replace the four way valve.
Conduct vacuum drying.
Replace the refrigerant.
Multi meter
(DC. voltage
range)
S20
Electronic
expansion
valve coil
(R6027)
Check
(R3050)
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