L5" Outdoor Unit: Inverter Compressor Abnormal - Daikin VRV II RXYQ5MY1B Service Manual

Troubleshooting by Indication on the Remote Controller

2.33 "L5" Outdoor Unit: Inverter Compressor Abnormal

L5
Remote
Controller
Display
Applicable RXYQ5~48M
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.
Decision (Instantaneous overcurrent also causes activation.)
Conditions
Supposed
Causes
Troubleshooting
Compressor inspection
Higher voltage than actual is displayed when the inverter output voltage is checked by tester.
210
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 ±10V)
Must be measured
when frequency
is stable.
NO
There is
instantenious power
drop.
NO
YES
YES
YES
SiE39-404
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.
(V2812)
Troubleshooting