Ol Activation (Compressor Overload) - Daikin FTXN09KEVJU Service Manual

Troubleshooting
4.9

OL Activation (Compressor Overload)

E5
Remote
Controller
Display
Method of
A compressor overload is detected through compressor OL.
Malfunction
Detection
 If the error repeats, the system is shut down.
Malfunction
 Reset condition: Continuous run for about 60 minutes without any other error
Decision
 The operating temperature condition is not specified.
Conditions
 Defective discharge pipe thermistor
Supposed
 Defective electronic expansion valve or coil
Causes
 Defective four-way valve or coil
 Defective outdoor unit PCB
 Refrigerant shortage
 Water mixed in refrigerant
 Defective stop valve
Troubleshooting
Check No.01
Refer to P.116
Check No.12
Refer to P.118
Check No.13
Refer to P.119
Check No.14
Refer to P.119
90
Be sure to turn off the power switch before connecting or disconnecting
Caution
connectors, or parts may be damaged.
Discharge pipe
YES
thermistor
disconnected?
NO
NG
Check No. 01
Check the thermistors.
∗ Discharge pipe thermistor
OK
Check No. 12
NG
Check the electronic
expansion valve.
OK
Check No. 13 NG
Check the four way
valve.
OK
Check No. 14
NG
Check the refrigerant
∗ Refrigerant shortage
line.
∗ Water mixed
∗ Stop valve
OK
SiUS041111
Insert the thermistor in
position.
Replace the discharge pipe
thermistor.
Replace the electronic
expansion valve or the coil.
Replace the four way valve
or the coil.
Replace the outdoor unit
PCB.
Refer to the refrigerant line
check procedure.
Replace the outdoor unit
PCB.
(R14438)
Service Diagnosis