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

Troubleshooting by Error Code

3.55 Compressor Overcurrent

Applicable
All outdoor unit models
Models
L8
Error Code
Method of Error
Detect current flowing through the power transistor.
Detection
Error Decision
When the secondary-side inverter current exceeds a certain value.
Conditions
Supposed
 Compressor overloaded
Causes  Wiring disconnection in compressor coil
 Disconnection of compressor wiring
 Defective inverter PCB
 Incorrect power supply voltage
Troubleshooting
321
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
leads of the relevant
Power OFF
compressor
normal?
Are
wiring and wire
connections to the relevant
compressor
normal?
The
insulation
resistance of the
relevant compressor is
100 kΩ or less to
ground.
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