Daikin AT12BV1LS Pocket Manual page 73

Troubleshooting
5.2.23 Discharge Pipe Temperature Control
Remote
Controller
Display
Method of
Malfunction
Detection
Malfunction
Decision
Conditions
Supposed
Causes
72
F3
The discharge pipe temperature control (stop, frequency
drooping, etc.) is checked with the temperature being
detected by the discharge pipe thermistor.
If a stop takes place 6 times successively due to
abnormal discharge pipe temperature, the system will
be shut down.
If the temperature being detected by the discharge
pipe thermistor rises above 110°C, the compressor
will stop. (The error is cleared when the temperature
has dropped below 97°C.)
Stop temperatures
(1) 110°C : above 45Hz (rising), above 40Hz (dropping)
(2) 102°C : 30~45Hz (rising), 25~40Hz (dropping)
(3) 98°C : below 30Hz (rising), below 25Hz (dropping)
The error counter will reset itself if this or any other
error does not occur during the following 60-minute
compressor running time (total time).
Refrigerant shortage
Four way valve malfunctioning
Discharge pipe thermistor defective
(heat exchanger or outdoor air temperature thermistor
defective)
Outdoor unit PCB defective
Water mixed in the local piping
Electronic expansion valve defective
Stop valve defective
Si10-417
Service Diagnosis