Daikin R71FUV1 Service Manual page 322

Troubleshooting by Remote Controller
Troubleshooting
Caution
Check the installation
conditions.
Turn OFF the power
supply, and then
disconnect the
connection between the
compressor and inverter.
CHECK 4
Be sure to turn off the power switch before
connecting or disconnecting connectors, or parts
may be damaged.
Is the stop
valve open?
YES
Is the
difference
between high and
low pressure before
startup not more
than 0.2MPa?
YES
CHECK 4
Continuity check
in the power transistor
(IGBT). Is the
continuity
normal?
YES
A
Refer to P.464.
NO
Open the stop
valve.
NO
Insufficient
pressure
equalization.
Check refrigerant
system.
NO
Replace the
outdoor unit
PCB.
Si20-701_B
315