Daikin RZQ100B8V3B Service Manual page 231

ESIE05-03
Troubleshooting
Caution Be sure to turn off power switch before connect or disconnect connector, or parts damage may be
occurred.
Part 3 – Troubleshooting
Is the
secondary
current of the inverter
higher than ∗A (see below)
for each
phase?
NO
Turn the main power supply
off, and then disconnect the
connection between the
compressor and inverter.
Check 5.9.4
Continuity check in the
power transistor (IGBT)
Is the continuity
normal?
YES
Is the
inverter
output voltage
generated
approximately at the same
increasing speed on each
phase after turning
on again? (∗)
(U-V, V-W,
W-U)
YES
∗ Electronic thermal detection value
Cooling
RZQ71 (1 ~ )
Heating
Cooling
RZQ100 ~ 125 (1 ~ )
Heating
Cooling
RZQ100 ~ 140 (3 ~ )
Heating
YES
NO
NO
* When operating compressor
with compressor output line
disconnected, the compressor
stops due to malfunction after
elapsed time of 5 seconds.
Therefore, check the voltage
increase for 5 seconds.
Detection value
17A x 5 seconds or 14.8A x 260 seconds
31A × 5 seconds or 20.1A × 260 seconds
17A x 5 seconds or 12.1A x 260 seconds
17A x 5 seconds or 14.1A x 260 seconds
Error Codes: Outdoor Units
Compressor overload
Inspection of the compressor and
refrigerant system is required.
Replace the inverter PC board.
Replace the inverter PC board.
Compressor inspection
Inspect according to the diagnosis
procedure for abnormal noises,
vibration, operating status, etc.
of the compressor.
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