Daikin RZQ100B8V3B Service Manual page 229

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
Check the
installation conditions.
Is the stop valve open?
YES
Is the
compressor coil
disconnected or is the
insulation
defective?
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
for each phase after
turning on again?
(∗) (U-V, V-W,
W-U)
YES
Check the power
supply voltage.
Is
instantaneous voltage
drop generated?
NO
∗ Approximate value
RZQ71 (1 ~)
RZQ100 ~ 125 (1 ~)
RZQ100 ~ 140 (3 ~)
NO
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.
YES
Instantaneous overcurrent
detection value
32.0A
51.7A
32.3A
Error Codes: Outdoor Units
Open the stop valve.
Replace the compressor.
Replace the inverter PC board.
Replace the inverter PC board.
Correct the power supply.
Compressor inspection
Inspect according to the diagnosis
procedure for abnormal noise,
vibration, operating status, etc. of
the compressor.
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