Daikin VRV IV-S RXTQ-TAVJU Series, Service Manual

Page: 198 / 272

Troubleshooting by Error Code SiUS331604E
185 Service Diagnosis
4.33 Inverter Compressor Overcurrent
Error Code
L8
Applicable
Models
All outdoor units
Method of Error
Detection
Error is detected by current flowing in the power transistor.
Error Decision
Conditions
Overload in the compressor is detected.
Supposed
Causes
„
Compressor overload
„
Broken wire inside compressor
„
Defective PCB
„
Disconnection of compressor
Troubleshooting
Refer to page 225.
NO
YES
YES
NO
Check if the
compressor lead wires are
normal.
Insulation
resistance of the
compressor is 100 k
Ω
or below.
YES
NO
NO
Caution
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
Compressor coils are
disconnected.
Connect the compressor lead
wires then restart the operation.
CHECK 4
Check if the power transistor
is normal.
YES
Replace the compressor
lead wires.
Replace the inverter
compressor.
Replace the inverter
compressor.
Replace the
outdoor main PCB
(A1P).
NO
YES
Error code
L8
is
displayed again.
Continue the operation.
Inspection of the
compressor.
CHECK 4