Ol Activation (Compressor Overload) - Daikin CTXU25G2V1B Service Manual

Troubleshooting
2.17 OL Activation (Compressor
E5
Remote
Controller
Display
Method of A compressor overload is detected through compressor OL.
Malfunction
Detection
Malfunction
Decision
Conditions
∗
Supposed
Causes
Troubleshooting
Check No.02
Refer to P.162
Check No.12
Refer to P.165
Check No.17
Refer to P.169
Check No.31
Refer to P.172
126
If the compressor OL is activated twice, the system will be shut down.
The error counter will reset itself if this or any other error does not occur during the following
60-minute compressor running time (total time).
The operating temperature condition is not specified.
Refrigerant shortage
Four way valve malfunctioning
Outdoor unit PCB defective
Water mixed in the local piping
Electronic expansion valve defective
Stop valve defective
Be sure to turn off power switch before connect or disconnect connector,
Caution or parts damage may be occurred.
Discharge
pipe thermistor
disconnected?
NO
Check No. 02
Check the thermistors.
Functioning
Check No. 17
Check the electronic
expansion valve.
Functioning
Check No. 31
Check the four way
valve.
Functioning
Check No. 12
Check the refrigerant
line.
Functioning
Overload)
YES
Malfunctioning
∗ Discharge pipe thermistor
Malfunctioning
Malfunctioning
Malfunctioning
∗ Refrigerant shortage
∗ Water mixed
∗ Stop valve defective
SiBE12-908
Insert the thermistor in
position.
Replace the discharge pipe
thermistor.
Replace the valve itself or
the coil.
Replace the four way valve
coil or the valve itself.
Replace the outdoor unit
PCB.
Refer to the refrigerant line
check procedure.
Replace the outdoor unit
PCB.
(R9438)
Service Diagnosis