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Troubleshooting by Indication on the Remote Controller
SiUS28-902_a
129
Troubleshooting
3.35 “
U0
” Outdoor Unit: Low Pressure Drop Due to
Refrigerant Shortage or Electronic Expansion Valve
Failure
Remote
Controller
Display
U0
Applicable
Models
RZQ18~30PVJU
Method of
Malfunction
Detection
Short of gas malfunction is detected by discharge pipe temperature thermistor and low pressure
saturation temperature.
Malfunction
Decision
Conditions
Microcomputer judge and detect if the system is short of refrigerant.
Malfunction is not decided while the unit operation is continued.
Supposed
Causes
Out of gas or refrigerant system clogging (incorrect piping)
Defect of pressure sensor
Defect of outdoor unit P.C.B. (A1P)
Defect of thermistor R3T
Summary of Contents for SkyAir FCQ18PVJU
Page 1: ...Split System Air Conditioners SkyAir Inverter R 410A Heat Pump 60Hz P Series SiUS28 902_a...
Page 44: ...Other Control SiUS28 902_a 37 Function...
Page 81: ...SiUS28 902_a Troubleshooting by Remote Controller Troubleshooting 74...
Page 185: ...SiUS28 902 Precautions for New Refrigerant R 410A Precautions for New Refrigerant R 410A 178...