Daikin AT12BV1LS Pocket Manual page 41

Troubleshooting
5.2.4 OL Activation (Compressor Overload)
Remote
Controller
Display
Method of
Malfunction
Detection
Malfunction
Decision
Conditions
Supposed
Causes
Trouble
shooting
Check No.4
Refer to
P.151
Check
No.5-1
Refer to
P.155
Check No.6
Refer to
P.157
Check No.11
Refer to
P.162
40
E5
A compressor overload is detected through compressor
OL.
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
Caution
disconnect connector, 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. 5-1
Check the four way
valve.
Functioning
Check No. 11
Check the refrigerant
line.
Functioning
YES
Insert the thermistor in
position.
Malfunctioning
Replace the discharge
∗ Discharge
pipe thermistor.
pipe
thermistor
Malfunctioning
Replace the valve
itself or the coil.
Malfunctioning
Replace the four way
valve coil or the valve
itself.
Replace the outdoor
unit PCB.
Malfunctioning
Refer to the refrigerant
∗ Refrigerant
line check procedure.
shortage
∗ Water mixed
∗ Stop valve
defective
Replace the outdoor
unit PCB.
Service Diagnosis
Si10-417
(R2841)