U0" Low Pressure Drop Due To Refrigerant Shortage Or Electronic Expansion Valve Failure - Daikin ERQ Service Manual

ESIE09-05
U0
3.38 " " Low Pressure Drop Due to Refrigerant Shortage or
Electronic Expansion Valve Failure
U0
Remote
Controller
Display
Applicable
ERQ 125 ~ 200 A7V1
Models
Method of Short of gas malfunction is detected by discharge pipe temperature thermistor and low pressure
Malfunction saturation temperature.
Detection
Malfunction
Microcomputer judge and detect if the system is short of refrigerant.
Decision Malfunction is not decided while the unit operation is continued.
Conditions
Supposed
Causes
Troubleshooting
Out of gas or refrigerant system clogging (incorrect piping)
Defect of pressure sensor
Defect of outdoor unit PC board (A1P)
Defect of thermistor R3T
Troubleshooting by Indication on the Remote Controller
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