Discharge Pipe Temperature Control - Daikin FTXS20G2V1B Service Manual

SiENBE04-808_A

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 discharge pipe temperature has dropped below
Conditions
<20/25/35 class>
Stop temperatures
(1) above 45 Hz (rising), above 40 Hz (dropping)
(2) 30 ~ 45 Hz (rising), 25 ~ 40 Hz (dropping)
(3) below 30 Hz (rising), below 25 Hz (dropping)
<42 class>
Stop temperatures
(1) above 30Hz (rising), above 25Hz (dropping)
(2) below 30Hz (rising), below 25Hz (dropping)
<50 class>
„ If the error repeats, 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
Service Diagnosis
compressor stops.
(°C) (°C)
110 95
(Defective outdoor heat exchanger thermistor or outdoor temperature thermistor)
(°C) (°C)
110 97
105 92
99 86
(°C) (°C)
110 95
108 93
Troubleshooting
°C, the
°C.
120