Daikin FTXS30HVJU - OL Activation (Compressor Overload)

Troubleshooting SiUS04-924
82 Service Diagnosis
4.9 OL Activation (Compressor Overload)
Remote
Controller
Display
E5
Method of
Malfunction
Detection
A compressor overload is detected through compressor OL.
Malfunction
Decision
Conditions
 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.
Supposed
Causes
 Refrigerant shortage
 Four-way valve malfunctioning
 Outdoor unit PCB defective
 Water mixed in the local piping
 Electronic expansion valve defective
 Stop valve defective
Troubleshooting
Check No.04
Refer to P.106
Check No.05
Refer to P.107
Check No.06
Refer to P.108
Check No.11
Refer to P.110
(R7137)
Caution
Be sure to turn off the power switch before connecting or disconnecting
the connector, or parts damage may occur.
YES
Malfunctioning
* Discharge pipe thermistor
NO
Functioning
Functioning
Malfunctioning
* Refrigerant shortage
* Water mixed
* Stop valve defective
Malfunctioning
Functioning
Malfunctioning
Functioning
Insert the thermistor in
position.
Replace the discharge pipe
thermistor.
Replace the valve itself or
the coil.
Refer to the refrigerant line
check procedure.
Replace the outdoor unit
PCB.
Replace the four-way valve
coil or the valve itself.
Replace the outdoor unit
PCB.
Discharge pipe
thermistor disconnected?
Check No. 06
Check the thermistors.
Check No. 05
Check the four-way valve.
Check No. 11
Check the refrigerant line.
Check No. 04
Check the electronic
expansion valve.