Ol Activation (Compressor Overload) - Daikin FTXN25KEV1B 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
Malfunction
Decision
∗
Conditions
Supposed
Causes
Troubleshooting
Check No.01
Refer to P.87
Check No.12
Refer to P.89
Check No.13
Refer to P.90
Check No.14
Refer to P.90
64
If the error repeats, the system is shut down.
Reset condition: Continuous run for about 60 minutes without any other error
The operating temperature condition is not specified.
Defective discharge pipe thermistor
Defective electronic expansion valve or coil
Defective four way valve or coil
Defective outdoor unit PCB
Refrigerant shortage
Water mixed in refrigerant
Defective stop valve
Be sure to turn off the power switch before connecting or disconnecting
Caution connectors, or parts may be damaged.
Discharge
pipe thermistor
disconnected?
NO
Check No. 01
Check the thermistors.
OK
Check No. 12
Check the electronic
expansion valve.
OK
Check No. 13
Check the four way
valve.
OK
Check No. 14
Check the refrigerant
line.
OK
YES
NG
∗ Discharge pipe thermistor
NG
NG
NG
∗ Refrigerant shortage
∗ Water mixed
∗ Stop valve
SiBE041102_A
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