Daikin FTKS20D3VMW, Service Manual, Page: 267 / 355

Troubleshooting SiENBE12-713
256 Service Diagnosis
5.17 High Pressure Control in Cooling
Remote Control
Display
F6
Outdoor Unit LED
Display A 5 1 4 2 1 3 4 4 4
Method of
Malfunction
Detection High-pressure control (stop, frequency drop, etc.) is activated in the cooling mode if the
temperature being sensed by the heat exchanger thermistor exceeds the limit.
Malfunction
Decision
Conditions
"
Activated when the temperature being sensed by the heat exchanger thermistor rises above
65°C.
"
The error is cleared when the temperature drops below 50°C.
Supposed
Causes
"
The installation space is not large enough.
"
Faulty outdoor unit fan
"
Faulty electronic expansion valve
"
Faulty outdoor unit heat exchanger thermistor
"
Faulty outdoor unit PCB
"
Faulty stop valve
"
Dirty heat exchanger