Inverter Compressor Instantaneous Overcurrent - Daikin VRV IV-S RXTQ-TAVJU Series Service Manual

SiUS331604E

4.32 Inverter Compressor Instantaneous Overcurrent

L5
Error Code
Applicable
All outdoor units
Models
Method of Error Error is detected from current flowing in the power transistor.
Detection
Error Decision An excessive current flows in the power transistor.
Conditions
Supposed
Causes
Troubleshooting
Service Diagnosis
Defective compressor coil (disconnected, defective insulation)
Defective compressor startup (mechanical lock)
Defective PCB
Be sure to turn off the power switch before connecting or disconnecting
Caution connectors, or parts may be damaged.
Insulation
resistance of
the compressor
is 100 kΩ or
Compressor coils are
disconnected.
CHECK 4
Check if the power
transistor is
Failure occurs
again after restarting the
Replace the outdoor main PCB.
Failure occurs
again after restarting the
CHECK 4 Refer to page 225.
YES
below.
NO
YES
NO
NO
normal.
YES
NO
unit.
YES
NO
unit.
YES
Troubleshooting by Error Code
Replace the inverter
compressor.
Replace the inverter
compressor.
Replace the outdoor main
PCB (A1P).
Continue the operation.
(
Momentary power failure
is possible.
Continue the operation.
Replace the compressor.
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