Daikin VRVIII-S, Service Manual

Page: 171 / 266

Troubleshooting by Indication on the remote control SiENBE34-703
160 Troubleshooting
3.33 “
L8
” Outdoor Unit: Inverter Current Abnormal
remote control
Display
L8
Applicable
Models RXYSQ4~6P
Method of
Malfunction
Detection Malfunction is detected by current flowing in the power transistor.
Malfunction
Decision
Conditions When overload in the compressor is detected.
Supposed
Causes
! Compressor overload
! Compressor coil disconnected
! Defect of outdoor unit PC board (A2P)
Troubleshooting
(V3184)
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
Output current check
Caution
Inverter
output voltage
check Inverter output
voltage is not balanced
(Normal if within ±5V).
Must be measured when
frequency is stable.
Compressor overload
Inspection of the compressor and
refrigerant system is required.
Compressor inspection
Inspect according to the diagnosis
procedure for odd noises, vibration
and operating status of the
compressor.
Replace the inverter PC board
assy (A2P).
Reset and restart.
The
secondary current
of the inverter is higher than
13.1A, 260 sec. for each
phase.
Replace the compressor.
Compressor
inspection The
compressor's coil is
disconnected.
Disconnect the the connection
between the compressor and
inverter. Make the power
transistor check mode setting
ON by service mode.
After turning on
again, "L8" blinks
again.
YES
YES
YES
YES
NO
NO
NO
NO