Daikin VRV S RXQ4/5ARV1 - Compressor Instantaneous Overcurrent

Troubleshooting by Error Code SiAF332111E
272 Part 6 Service Diagnosis
Note(s)
Reference
5.44 Compressor Instantaneous Overcurrent
5.44.1 Compressor Instantaneous Overcurrent (4/5/10/12 HP Models)
Applicable
Models
RXQ4/5AR, RXMQ10/12AR
Error Code L5
Method of Error
Detection
Error is detected from current flowing in the power transistor.
Error Decision
Conditions
An excessive current flows in the power transistor.
Supposed
Causes
 Defective compressor coil (disconnected, defective insulation)
 Defective compressor startup (mechanical lock)
 Defective outdoor unit main PCB (4/5 HP)
 Defective inverter PCB (10/12 HP)
Troubleshooting
1. RXQ4/5AR: outdoor unit main PCB (A1P)
RXMQ10/12AR: inverter PCB (A3P)
CHECK 4 Refer to page 340.
YES
YES
NO
NO
YES
NO
NO
Check if the power
transistor is
normal.
Failure occurs
again after restarting the
unit.
YES
(
(
Caution
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
Insulation
resistance of
the compressor
is 100 k or
below.
Continue the operation.
Momentary power failure
is possible.
Replace the compressor
(M1C).
Replace the compressor
(M1C).
CHECK 4
Replace the PCB (1).
NO
YES
Failure occurs
again after restarting the
unit.
Continue the operation.
Replace the compressor
(M1C).
Replace the PCB (
1).
The internal
wiring of the
compressor coil is
defective.