Compressor Instantaneous Overcurrent - Daikin VRV Aurora RXLQ-TATJU Series Service Manual

Troubleshooting by Error Code

3.54 Compressor Instantaneous Overcurrent

Applicable
All outdoor unit models
Models
L5
Error Code
Method of Error
Detect current flowing through the power transistor.
Detection
Error Decision
When overcurrent flows instantaneously through the power transistor.
Conditions
Supposed
 Defective compressor coil (such as wiring disconnection or insulation failure)
Causes  Compressor startup failure (mechanical lock)
 Defective inverter PCB
Troubleshooting
319
Be sure to turn off the power switch before connecting or disconnecting
Caution connectors, or parts may be damaged.
Is the stop valve open?
Check the compressor cable
for disconnection and flaws.
Are the
Power OFF
leads of the relevant
compressor normal?
Are
wiring and wire
connections to the relevant
compressor
normal?
The
insulation
resistance of the relevant
compressor is 100 kΩ
or less.
The
internal wiring of
the compressor coil is
defective.
A
NO
YES
NO
YES
NO
YES
YES
NO
YES
NO
Go to the next page.
SiUS341802EC
Open the stop valve.
Replace the leads of the
relevant compressor.
Rectify the wiring and
wire connections.
Replace the
compressor.
Replace the
compressor.
Part 6 Service Diagnosis