Specifications

SiUS39-601 Troubleshooting by Indication on the Remote Controller
Troubleshooting 175
2.43 “U2” Outdoor Unit: Power Supply Insufficient or
Instantaneous Failure
Remote
Controller
Display
U2
Applicable
Models
RXYQ72M, 96M
Method of
Malfunction
Detection
Detection of voltage of main circuit capacitor built in the inverter and power supply voltage.
Malfunction
Decision
Conditions
When the capacitor above only has a voltage of 190 V or less.
Supposed
Causes

Power supply insufficient

Instantaneous failure

Open phase

Defect of inverter PC board

Defect of outdoor control PC board

Defect of K1M.

Main circuit wiring defect