Ol Activation (Compressor Overload) - Daikin CTXS09GVJU Service Manual

Troubleshooting

5.11 OL Activation (Compressor Overload)

E5
Remote
Controller
Display
Outdoor Unit LED A 5
Display
Method of
A compressor overload is detected through compressor OL.
Malfunction
Detection
Malfunction
Decision
Conditions
∗ The operating temperature condition is not specified.
Supposed
Causes
Troubleshooting
Check No.04
Refer to P.159
Check No.05
Refer to P.160
Check No.06
Refer to P.161
Check No.11
Refer to P.164
128
1 4 2 1 3 4 4
If the compressor OL is activated twice, the system will 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).
Refrigerant shortage
Four-way valve malfunctioning
Outdoor unit PCB defective
Water mixed in the local piping
Electronic expansion valve defective
Shut-off 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. 06
Check the thermistors.
Functioning
Check No. 04
Check the electronic
expansion valve.
Functioning
Check No. 05
Check the four way
valve.
Functioning
Check No. 11
Check the refrigerant
line.
Functioning
1
YES
Malfunctioning
∗ Discharge pipe thermistor
Malfunctioning
Malfunctioning
Malfunctioning
∗ Refrigerant shortage
∗ Water mixed
∗ Stop valve defective
SiUS12-814
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.
(R7137)
Service Diagnosis