Ol Activation (Compressor Overload) - Daikin FTXS09HVJU Service Manual

SiUS04-904
4.7

OL Activation (Compressor Overload)

E5
Remote
Controller
Display
A compressor overload is detected through compressor OL.
Method of
Malfunction
Detection
 If the compressor OL is activated twice, the system is shut down.
Malfunction
 The error counter is reset if this or any other error does not occur during the following 60-minute
Decision
Conditions
 The operating temperature condition is not specified.
 Refrigerant shortage
Supposed
 Four-way valve malfunctioning
Causes
 Outdoor unit PCB defective
 Water mixed in the local piping
 Electronic expansion valve defective
 Stop valve defective
Troubleshooting
Check No.04
Refer to P.144
Check No.05
Refer to P.145
Check No.06
Refer to P.146
Check No.11
Refer to P.149
108
compressor running time (total time).
Be sure to turn off the power switch before connecting or disconnecting
Caution
the connector, or parts damage may occur.
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
YES
Malfunctioning
* Discharge pipe thermistor
Malfunctioning
Malfunctioning
Malfunctioning
* Refrigerant shortage
* Water mixed
* Stop valve defective
Troubleshooting
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