U2" Outdoor Unit: Power Supply Insufficient Or Instantaneous Failure - Daikin RTSQ20PY1 Service Manual

SiBE31-801_C
U2
4.46 " " Outdoor Unit: Power Supply Insufficient or
Instantaneous Failure
U2
Remote
Controller
Display
Applicable RTSQ8P~16P (Outdoor Unit), BTSQ20P (Function Unit)
Models
Method of Detection of voltage of main circuit capacitor built in the inverter and power supply voltage.
Malfunction
Detection
Malfunction When the voltage aforementioned is not less than 780V or not more than 320V, or when the
current-limiting voltage does not reach 200V or more or exceeds 740V.
Decision
Conditions
Supposed
Causes
Troubleshooting
Power supply insufficient
Instantaneous power failure
Open phase
Defect of inverter PCB
Defect of outdoor control PCB
Main circuit wiring defect
Faulty compressor
Faulty fan motor
Faulty connection of signal cable
Troubleshooting by Indication on the Remote Controller
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