Uo" Low Pressure Drop Due To Refrigerant Shortage Or; Electronic Expansion Valve Failure - Daikin VRV - WII Service Manual

SiUS30-604
2.37 "UO"
Low Pressure Drop Due to Refrigerant Shortage or

Electronic Expansion Valve Failure

U0
Remote
Controller
Display
Applicable RWEYQ60, 72, 84MTJU
Models
Method of Detect insufficient gas using low pressure or difference in temperature between the suction pipe
and the heat exchanger.
Malfunction
Detection
Malfunction In cooling
Decision
In heating
Conditions
∗
Supposed
Causes
Troubleshooting
Low pressure of 36.2psi or less continues for 30 minutes
Suction gas superheated degree of 36°F or more continues for 60 minutes.
Abnormality is not confirmed and operation is continued.
Insufficient gas or clogged refrigerant (wrong piping)
Faulty thermistor (R2T, R4T)
Faulty low pressure sensor
Faulty main PCB (A1P)
Troubleshooting by Indication on the Remote Controller
207