Ol Activation (Compressor Overload) - Daikin Super Multi NX B series Service Manual

Troubleshooting
5.11

OL Activation (Compressor Overload)

E5
Remote
Controller
Display
Outdoor Unit LED A
Display
Method of A compressor overload is detected through compressor OL.
Malfunction
Detection
Malfunction
Decision
Conditions
∗
Supposed
Causes
Troubleshooting
Check No.4
Refer to P.208
Check No.5
Refer to P.209
Check No.6
Refer to P.210
Check No.11
Refer to P.213
184
5 1 4 2 1 3 4
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
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. 6
Check the thermistors
Functioning
Check No. 4
Check the electronic expantion
valve.
Functioning
Check No. 5
Check the four way valve.
Functioning
Check No. 11
Check the refrigerant line.
Functioning
4 1
YES
Malfunctioning
∗ Discharge pipe thermistor
Malfunctioning
Malfunctioning
Malfunctioning
∗ Refrigerant shortage
∗ Water mixed
∗ Stop valve defective
Si12-308
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.
(R2841)
Service Diagnosis