Ol Activation (Compressor Overload) - Daikin SUPER MULTI NX G Series Service Manual

SiUS12-928_A

5.11 OL Activation (Compressor Overload)

E5
Remote
Controller
Display
Outdoor Unit LED
A
Display
Method of
A compressor overload is detected through compressor OL.
Malfunction
Detection
 If the error repeats twice, 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
 Refrigerant shortage
Supposed
 Defective four
Causes
 Defective outdoor unit PCB
 Water mixed in refrigerant
 Defective electronic expansion valve
 Defective stop valve
Troubleshooting
Check No.04
Refer to P.150
Check No.05
Refer to P.151
Check No.06
Refer to P.152
Check No.11
Refer to P.155
Service Diagnosis
1 4 2 1 3 4 4 1
- way 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. 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
∗ Four way valve
∗ Water mixed
∗ Stop valve
Troubleshooting
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.
(R7137)
116