Troubleshooting
4.12 Discharge Pipe Temperature Control
4.12.1 09/12 Class
F3
Remote
Controller
Display
The discharge pipe temperature control (stop, frequency dropping, etc.) is checked with the
Method of
temperature being detected by the discharge pipe thermistor.
Malfunction
Detection
If a stop takes place 4 times successively due to abnormal discharge pipe temperature, the
Malfunction
Decision
If the temperature being detected by the discharge pipe thermistor rises above
Conditions
Stop temperatures
(1) above 45Hz (rising), above 40Hz (dropping)
(2) 30~45Hz (rising), 25~40Hz (dropping)
(3) below 30Hz (rising), below 25Hz (dropping)
The error counter is reset if this or any other error does not occur during the following 60-minute
Refrigerant shortage
Supposed
Four-way valve malfunctioning
Causes
Discharge pipe thermistor defective
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.06
Refer to P.146
Check No.11
Refer to P.149
Service Diagnosis
system is shut down.
compressor stops. (The error is cleared when the temperature has dropped below
compressor running time (total time).
(heat exchanger or outdoor air temperature thermistor defective)
Be sure to turn off the power switch before connecting or disconnecting
Caution
the connector, or parts damage may occur.
Check No. 06
Check the thermistors.
Functioning
Check No. 04
Check the electronic
expansion valve.
Functioning
Check No. 11
Check the refrigerant line.
Functioning
230
221
210
Malfunctioning
Discharge pipe thermistor
Outdoor unit heat exchanger thermistor
Outdoor temperature thermistor
Malfunctioning
Malfunctioning
Refrigerant shortage
Four-way valve malfunctioning
Water mixed
Stop valve defective
SiUS04-904
°F, the
°F.)
207
198
187
Replace the defective
thermistor.
Replace the valve itself or
the coil.
Refer to the refrigerant line
check procedure.
Replace the outdoor unit
PCB.
(R7141)
119