Low Pressure Drop Due To Refrigerant Shortage Or Electronic Expansion Valve Abnormality - Daikin RMXS-L Series Service Manual

Troubleshooting for Outdoor Unit
7.24 Low Pressure Drop due to Refrigerant Shortage or
Electronic Expansion Valve Abnormality
U0
Error Code
Method of Error Refrigerant shortage is detected by discharge pipe thermistor and low pressure saturation
temperature.
Detection
Error Decision Microcomputer judge and detect if the system is short of refrigerant.
★
The error is not decided while the operation continues.
Conditions
Supposed
Causes
252
Refrigerant shortage or refrigerant system clogging (incorrect piping)
Defective low pressure sensor
Defective main PCB (A1P)
Defective thermistor (R3T)
SiUS181631EA
Troubleshooting