Discharge Pipe Temperature Control - Daikin FTXS35K2V1B Service Manual

Troubleshooting

4.16 Discharge Pipe Temperature Control

F3
Error Code
Method of Error An error is determined with the temperature detected by the discharge pipe thermistor.
Detection
Error Decision
Conditions
<35 class>
(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>
Frequency
(1) above 35Hz (rising), above 30Hz (dropping)
(2) below 35Hz (rising), below 30Hz (dropping)
<50 class>
Supposed
Causes
Troubleshooting
Check No.01
Refer to P.92
Check No.12
Refer to P.93
Check No.14
Refer to P.94
79
If the temperature detected by the discharge pipe thermistor rises above A°C, the
compressor stops.
The error is cleared when the discharge pipe temperature has dropped below B°C.
A (°C) B (°C)
110 95
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
(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
Be sure to turn off the power switch before connecting or disconnecting
Caution connectors, or parts may be damaged.
Check No. 01
Check the thermistors.
OK
Check No. 12
Check the electronic
expansion valve.
OK
Check No. 14
Check the refrigerant
line.
OK
A (°C)
110
105
99
A (°C)
110
108
NG
∗
Discharge pipe thermistor
∗
Outdoor heat exchanger thermistor
∗
Outdoor temperature thermistor
NG
NG
∗
Refrigerant shortage
∗
Four way valve
∗
Water mixed
∗
Stop valve
SiBE041213E
B (°C)
97
92
86
B (°C)
95
93
Replace the defective
thermistor(s).
Replace the electronic
expansion valve or the coil.
Refer to the refrigerant line
check procedure.
Replace the outdoor unit
PCB.
(R15825)
Service Diagnosis