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

Troubleshooting by Error Codes

4.42 Inverter Compressor Overcurrent

L8
Error Code
Applicable All outdoor units
Models
Method of Error Error is detected by current flowing in the power transistor.
Detection
Error Decision
Overload in the compressor is detected.
Conditions
Supposed
 Compressor overload
Causes  Broken wire inside compressor
 Defective PCB
 Disconnection of compressor
Troubleshooting
Reference
CHECK 4 Refer to page 295.
270
Be sure to turn off the power switch before connecting or disconnecting
Caution connectors, or parts may be damaged.
Check if the
compressor lead wires are
normal.
YES
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
Connect the compressor lead
wires then restart the operation.
Error code L8 is
displayed again.
YES
NO
YES
YES
NO
NO
SiUS281811EA
Replace the compressor
lead wires.
Replace the inverter
compressor.
Replace the inverter
compressor.
Replace the
outdoor main PCB
(A1P).
Continue the operation.
Inspection of the
compressor.
Part 6 Service Diagnosis