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SiBE04-101
Troubleshooting
Service Diagnosis
111
Troubleshooting
∗
Erroneous internal wiring can result in output overcurrent in some cases. If system stops due to output
overcurrent after parts replacement that requires disconnection of wires, check wiring carefully
Check No.14
Refer to P.122
Check No.13
Refer to P.121
Check No.19
Refer to P.125
Check No.2
Refer to P.120
Turn off power, and turn it on
again. Then, check if error is
generated again.
NO
NO
NO
Is error generated again?
Is power transistor normal?
Supply voltage check.
Monitor supply voltage,
discharge/sunction pressures, etc.
for an extended period of time.
Possible causes
n
Momentary supply voltage drop
n
Excessive load on compressor
motor
n
Shorting in electric circuit due to
contact
Is stop valve fully open?
NO
Are outputs
of phases U, V and W
balanced?
NO
Is supply voltage at
related value?
YES
Is there any
shorting of compressor coil
phases or wire
breakage?
Check No.14
Power transistor check.
Check No.13
Power transistor output check.
Check No.19
Discharge pressure check.
Check No.2
Installation condition check.
YES
YES
YES
NO
YES
YES
Fully open stop valve.
Can be used as is.
(
∗
Monitering may be required)
Check connectors of electric
components.
Replace power transistor.
Replace the outdoor unit PCB.
Correct power supply.
Replace the compressor.
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
(R1066)
Check the wiring again.
SiBE04-101.book Page 111 Monday, October 15, 2001 3:08 PM