Daikin Altherma EKHBH Series, Service Manual

Page: 107 / 180

ESIE06-03 Error Codes: Outdoor Units
Part 3 – Troubleshooting 3–21
3 3
4
5
1
3.8
“F3”
Discharge Pipe Temperature Control
Error code
F3
Method of
malfunction
detection The discharge pipe temperature control (stop, frequency drooping, etc.) is checked with the
temperature being detected by the discharge pipe thermistor.
Malfunction
decision conditions
P
If a stop takes place 6 times successively due to abnormal discharge pipe temperature, the system
will be shut down.
P
If the temperature being detected by the discharge pipe thermistor rises above °C, the
compressor will stop. (The error is cleared when the temperature has dropped below °C.
P
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).
Supposed causes
P
Refrigerant shortage
P
Four way valve malfunctioning
P
Discharge pipe thermistor defective
(heat exchanger or outdoor temperature thermistor defective)
P
Outdoor unit PCB defective
P
Water mixed in the local piping
P
Electronic expansion valve defective
P
Stop valve defective
71 class
120
107