High Pressure Control In Cooling - Daikin FTX20K(2)V1B Service Manual

Troubleshooting

4.16 High Pressure Control in Cooling

F6
Error Code
High-pressure control (operation halt, frequency drop, etc.) is activated in cooling operation if
Method of Error
the temperature sensed by the outdoor heat exchanger thermistor exceeds the limit.
Detection
 The temperature sensed by the outdoor heat exchanger thermistor rise above 61°C
Error Decision
Conditions
 The error is cleared when the temperature drops below 51 ~ 52°C (depending on the
 The installation space is not large enough.
Supposed
 Dirty outdoor heat exchanger
Causes
 Defective outdoor fan motor
 Defective stop valve
 Defective electronic expansion valve or coil
 Defective outdoor heat exchanger thermistor
 Defective outdoor unit PCB
Troubleshooting
Check No.01
Refer to P.79
Check No.12
Refer to P.81
Check No.17
Refer to P.86
Check No.18
Refer to P.86
Check No.19
Refer to P.87
69
(depending on the model).
model).
Be sure to turn off the power switch before connecting or disconnecting
Caution connectors, or parts may be damaged.
Check the installation space.
Check No. 17
Check the installation
condition.
OK
Check No. 19
Check the outdoor fan.
OK
Check No. 18
Check the discharge
pressure.
OK
Check No. 12
Check the electronic
expansion valve.
OK
Check No. 01
Check the outdoor heat
exchanger thermistor.
OK
NG
NG
NG
NG
NG
SiBE041525F
Change the installation
location or direction.
Clean the outdoor heat
exchanger.
Replace the outdoor fan
motor.
Reconnect the connector or
fan motor lead wires.
Replace the stop valve.
Replace the electronic
expansion valve or the coil.
Replace the outdoor unit
PCB (main PCB).
Replace the outdoor heat
exchanger thermistor.
Replace the outdoor unit
PCB (main PCB).
(R20418)
Service Diagnosis