High Pressure Control In Cooling - Daikin FTX50GV1B Service Manual

SiBE041029EC

4.18 High Pressure Control in Cooling

F6
Error Code
Method of Error High-pressure control (operation halt, frequency drop, etc.) is activated in cooling operation if
the temperature sensed by the outdoor heat exchanger thermistor exceeds the limit.
Detection
Error Decision
Conditions
Supposed
Causes
Troubleshooting
Check No.01
Refer to P.95
Check No.12
Refer to P.96
Check No.17
Refer to P.100
Check No.18
Refer to P.100
Check No.19
Refer to P.101
Service Diagnosis
The temperature sensed by the outdoor heat exchanger thermistor rises above about
60 ~ 65°C (depending on the model).
The error is cleared when the temperature drops below about 50°C.
The installation space is not large enough.
Dirty outdoor heat exchanger
Defective outdoor fan motor
Defective stop valve
Defective electronic expansion valve or coil
Defective outdoor heat exchanger thermistor
Defective outdoor unit PCB
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
Troubleshooting
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)
80