Daikin VRV IV-S RXTQ-TAVJU Series Service Manual page 185

SiUS331604E
Troubleshooting
Power OFF
Power ON
Power OFF
Power ON
Power OFF
Power ON
CHECK4
Service Diagnosis
A
The
insulation resistance
is low (i.e., not more
than 100 kΩ.)
NO
Check the compressor motor
coil for any broken wire.
Some phase has
a broken wire.
NO
Restart the
compressor, and then
check whether or not
the error recurs.
YES
Has the
compressor started
up at high differential pressure
(not less than 0.5 MPa
(72.5 psi))?
NO
CHECK 4
Is the power
transistor normal?
YES
Does the error recur
when restart operation?
YES
Replace the outdoor main PCB.
Does the error recur
when restart operation?
YES
Refer to page 225.
YES
YES
NO
YES
NO
NO
NO
Troubleshooting by Error Code
Replace the compressor.
End of work
Defective pressure
equalization or else
may have occurred.
Check the refrigerant
system.
Defective pressure
equalization:
Check the refrigerant
system.
Replace the outdoor
main PCB (A1P).
Continue the operation.
(Instantaneous power
failure, etc.)
Continue the operation.
Replace the compressor.
(
No PCB error.
Reinstall the PCB.
)
172