Daikin FTXS36HVJU - Discharge Pipe Temperature Control

SiUS04-924_A Troubleshooting
88 Service Diagnosis
4.14 Discharge Pipe Temperature Control
Remote
Controller
Display
F3
Method of
Malfunction
Detection
An error is determined with the temperature detected by the discharge pipe thermistor.
Malfunction
Decision
Conditions
 If the temperature detected by the discharge pipe thermistor rises above 120°C (248°F), the
compressor stops.
 The error is cleared when the discharge pipe temperature has dropped below 107°C (224.6°F).
 If the error repeats, the system is shut down.
 Reset condition: Continuous run for about 60 minutes without any other error
Supposed
Causes
 Defective discharge pipe thermistor
(Defective outdoor heat exchanger thermistor or outdoor temperature thermistor)
 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.01
Refer to P.110
Check No.12
Refer to P.112
Check No.14
Refer to P.113
(R14412)
Caution
NG
OK
OK
OK
NG
NG
• Refrigerant shortage
• Four way valve
• Water mixed
• Stop valve
• Discharge pipe thermistor
• Outdoor heat exchanger thermistor
• Outdoor temperature thermistor
Replace the defective
thermistor.
Replace the electronic
expansion valve or the coil.
Refer to the refrigerant line
check procedure.
Replace the outdoor unit
PCB.
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
Check No. 01
Check the thermistors.
Check No. 12
Check the electronic
expansion valve.
Check No. 14
Check the refrigerant
line.