SiBE04-101
Checks
Service Diagnosis
123
< Measuring positions >
Take measurements at the power transistor (+) and (-) terminals in the same way as described in section 1.
Set the multi-tester to DC and VOLTAGE RANGE before measurement.
∗
Since capacitor (+) and (-) are connected to power transistor (+) and (-), capacitor voltage can be
measured at the power transistor (+) and (-) terminals.
∗
On this P.C.Board, Powertransistor (+) is terminal DC + 1 or DC + 2 and powertransistor (-) is terminal
DC - 1 or DC - 2.
5.1.7Refrigerant System Check
Check No.15
Is any moisture
found in sight glass.
Is the
discharge thermistor
disconnected from
the holder?
YES
Is
the temperature
of 4 way valve suction pipe
abnormaly high?
Check for gas leaks. See the
section on insufficient gas
detection.
Refrigerant system check (gas
leaking, short of gas)
NO
NO
NO
YES
YES
Connect thermistor to holder properly.
Conduct vacuum drying.
Faulty 4 way valve, replace 4 way
valve.
Replace the refrigerant.
(R1079)
Conduct the check after operating the
equipment for a sufficient length of time.
SiBE04-101.book Page 123 Monday, October 15, 2001 3:08 PM