L5" Outdoor Unit: Inverter Compressor Abnormal; Inverter Compressor Abnormal - Daikin VRV II RXYQ5MATL Service Manual

Si39-504
3.33 " L5 " Outdoor Unit:
L5
Remote
Controller
Display
Applicable RXYQ5MA~48MA
Models
Method of Malfunction is detected from current flowing in the power transistor.
Malfunction
Detection
Malfunction When an excessive current flows in the power transistor.
(Instantaneous overcurrent also causes activation.)
Decision
Conditions
Supposed
Causes
Troubleshooting
Compressor inspection
Higher voltage than actual is displayed when the inverter output voltage is checked by tester.
Troubleshooting

Inverter Compressor Abnormal

Defect of compressor coil (disconnected, defective insulation)
Compressor start-up malfunction (mechanical lock)
Defect of inverter PC board
Be sure to turn off power switch before connect or disconnect connector,
Caution
or parts damage may be occurred.
The compressor's
coil is disconnected or the
insulation is
defective.
NO
Disconnect the connection
between the compressor and
inverter. Make the power
transistor check mode setting
ON by service mode.
Inverter
output
voltage check
Inverter output
voltage is not balanced.
(Normal if within 380±10V
(YL) or 220±5V(TL))
Must be measured
when frequency
is stable.
NO
There is
instantenious power
drop.
NO
Troubleshooting by Indication on the Remote Controller
YES
YES
YES
Replace the compressor.
Replace the inverter unit.
Correct power supply.
Compressor inspection
Inspect according to the diagnosis
procedure for odd noises, vibration
and operating status of the
compressor.
207