Daikin VRV III RXYQ5-54PY1, Service Manual, Page: 275 / 398

Troubleshooting by Indication on the Remote Controller Si34-601A
264 Troubleshooting
3.34
“
L8
”
Outdoor Unit: Inverter Current Abnormal
Remote
Controller
Display
L8
Applicable
Models RXYQ5P~54P
Method of
Malfunction
Detection Malfunction is detected by current flowing in the power transistor.
Malfunction
Decision
Conditions When overload in the compressor is detected. (Inverter secondary current 16.1A)
Supposed
Causes
„
Compressor overload
„
Compressor coil disconnected
„
Defect of inverter PC board
„
Faulty compressor
Troubleshooting Output current check
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
Power ON
Power OFF
NO
NO
NO
NO
NO
YES
YES
YES
YES
NO
YES
NO
A current
of not less than 15A
flows through the
compressor.
Are wire
connections properly
made (according to the
Wiring Diagram)?
The insulation
resistance is low, i.e.,
not more than
100k
Ω
.)
Does the
power transistor have any
abnormalities?
Is the stop valve
open?
Disconnect the cable from the
compressor, and then check
the compressor for the
insulation resistance.
Check the power transistor on
the inverter PC board using a
multiple tester.
Connect the compressor cable,
and then restart the operation.
Check the compressor cable for
any disconnection or flaws.
Overcurrent:
Check the compressor
and refrigerant system
(in the same manner as
that for E3).
Open the stop valve.
Rectify the wire
connetions.
Replace the
compressor.
Replace the inverter
PCB.
The inverter is likely to
have got faulty due to
the malfunction of the
compressor.
After the completion of
replacement, be sure
to check the
compresssor.
A