Inverter Compressor Overcurrent - Daikin RXYQ-TA Series Service Manual

Troubleshooting by Error Code

3.47 Inverter Compressor Overcurrent

L8
Error Code
Applicable
All outdoor unit models
Models
Method of Error
Detect current flowing through the power transistor.
Detection
When the secondary-side inverter current exceeds: ∗1
Error Decision
Conditions
Supposed
Causes
Troubleshooting
247
Compressor overloaded
Wiring disconnection in compressor coil
Disconnection of compressor wiring
Defective inverter PCB
Be sure to turn off the power switch before connecting or disconnecting
Caution connectors, or parts may be damaged.
Check in Monitor Mode
12/14 ton classes are
equipped with 2 compressors.
Check for the compressor 1 or
2 applicable to the error code
L8 while in monitor mode of
the outdoor unit PCB.
Is the stop valve open?
Check for the leads of the
compressor.
For Compressor 1
Leads on the M1C side
Power OFF
For Compressor 2
Leads on the M2C side
Are the
leads of the relevant
compressor
normal?
A
NO
YES
NO
YES
SiUS341615E
Open the stop valve.
Replace the leads of the
relevant compressor.
Service Diagnosis