Inverter Compressor Instantaneous Overcurrent - Daikin SkyAir RZR-TA Series Service Manual

SiUS281811EA

4.41 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
 Defective compressor coil (disconnected, defective insulation)
Causes  Defective compressor startup (mechanical lock)
 Defective PCB
Troubleshooting
Reference
CHECK 4 Refer to page 295.
Part 6 Service Diagnosis
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 k: or
below.
NO
Compressor coils are
disconnected.
NO
CHECK 4
Check if the power
transistor is
normal.
YES
Failure occurs
again after restarting the
unit.
YES
Replace the outdoor main PCB.
Failure occurs
again after restarting the
unit.
YES
Troubleshooting by Error Codes
YES
YES
NO
NO
NO
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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