Daikin VRVII Manual page 216

Troubleshooting by Indication on the Remote Controller
Troubleshooting
Compressor inspection
Caution
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 for Y1, YL
power supply and ±5V
for TL power supply)
Must be measured
when frequency
is stable.
NO
A
Be sure to turn off the power switch before
connecting or disconnecting connectors, or parts
may be damaged.
YES
YES
Replace the
compressor.
Replace the
inverter unit.
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