Discharge Pipe Temperature Control - Daikin ATXS35EV1B7 Service Manual

SiBE04-824
4.14

Discharge Pipe Temperature Control

F3
Remote
Controller
Display
Method of The discharge pipe temperature control (stop, frequency drooping, etc.) is checked with the
Malfunction temperature being detected by the discharge pipe thermistor.
Detection
Malfunction 25/35 class
Decision
Conditions
Stop temperatures
(1) above 45Hz (rising), above 40Hz (dropping)
(2) 30~45Hz (rising), 25~40Hz (dropping)
(3) below 30Hz (rising), below 25Hz (dropping)
50 class
Supposed
Causes
Service Diagnosis
If a stop takes place 4 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
compressor will stop. (The error is cleared when the temperature has dropped below
°C.)
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).
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
compressor will stop. (The error is cleared when the temperature has dropped below
50 class
110
95
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
110 97
105 92
99 86
Troubleshooting
°C, the
°C, the
°C.)
101