U2" Outdoor Unit: Power Supply Insufficient Or; Instantaneous Failure - Daikin VRV II RXYQ5MATL Service Manual

Troubleshooting by Indication on the Remote Controller
3.41 " U2 " Outdoor Unit:

Instantaneous Failure

U2
Remote
Controller
Display
Applicable RXYQ5MA~48MA
Models
Method of Detection of voltage of main circuit capacitor built in the inverter and power supply voltage.
Malfunction
Detection
Malfunction When the capacitor above only has a voltage of 380 V or less (YL).
When the capacitor above only has a voltage of 220 V or less (TL).
Decision
Conditions
Supposed
Causes
216
Power Supply Insufficient or
Power supply insufficient

Instantaneous failure

Open phase
Defect of inverter PC board
Defect of outdoor control PC board
Main circuit wiring defect
Si39-504
Troubleshooting