Discharge Pipe Temperature Control - Daikin SiENBE07-618_C Service Manual

SiENBE07-618_C

4.14 Discharge Pipe Temperature Control

F3
Remote Control
Display
Method of An error is determined with the temperature detected by the discharge pipe thermistor.
Malfunction
Detection
„ If the temperature detected by the discharge pipe thermistor rises above
Malfunction
Decision
„ The error is cleared when the temperature is dropped below
Conditions
„ If the error repeats 6 times, the system is shut down.
„ Reset condition: Continuous run for about 60 minutes without any other error
„ Defective discharge pipe thermistor
Supposed
Causes
„ Defective electronic expansion valve or coil
„ Refrigerant shortage
„ Defective four way valve
„ Water mixed in refrigerant
„ Defective stop valve
„ Defective outdoor unit PCB
Troubleshooting
Check No.04
Refer to P.94
Check No.06
Refer to P.96
Check No.11
Refer to P.98
Service Diagnosis
compressor stops.
(°C) (°C)
110 95
(Defective outdoor heat exchanger thermistor or outdoor temperature thermistor)
Be sure to turn off the power switch before connecting or disconnecting
Caution
connectors, or parts may be damaged.
Check No. 06
Check the thermistors.
OK
Check No. 04
Check the electronic
expansion valve.
OK
Check No. 11
Check the refrigerant line.
OK
NG
• Discharge pipe thermistor
• Outdoor heat exchanger thermistor
• Outdoor temperature thermistor
NG
NG
• Refrigerant shortage
• Four way valve
• Water mixed
• Stop valve
Troubleshooting
°C, the
°C.
Replace the defective
thermistor.
Replace the electronic
expansion valve or the coil.
Refer to the refrigerant line
check procedure.
Replace the outdoor unit
PCB.
(R7141)
75