High Pressure Control In Cooling - Daikin FTXS20K2V1B Service Manual

Troubleshooting

4.17 High Pressure Control in Cooling

F6
Remote
Controller
Display
Method of
High-pressure control (operation halt, frequency drop, etc.) is activated in cooling operation if
Malfunction the temperature sensed by the outdoor heat exchanger thermistor exceeds the limit.
Detection
Malfunction
Decision
Conditions
Supposed
Causes
Troubleshooting
Check No.01
Refer to P.101
Check No.12
Refer to P.103
Check No.17
Refer to P.107
Check No.18
Refer to P.107
Check No.19
Refer to P.108
88
The temperature sensed by the outdoor heat exchanger thermistor rises above about
65°C.
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
SiBE041134
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.
Replace the outdoor heat
exchanger thermistor.
Replace the outdoor unit
PCB.
(R15667)
Service Diagnosis