Daikin VRV RXYQ72-384XAYCA Service Manual page 247

SiUS342004EB
Troubleshooting
Part 6 Service Diagnosis
Be sure to turn off the power switch before connecting or disconnecting
Caution connectors, or parts may be damaged.
Turn OFF the power and
wait for 10 minutes.
There is a
YES
foreign matter around
the fan.
NO
The
fan motor
connectors (X1A
YES
and X2A) of the fan PCB
(A2P) are
disconnected.
NO
The
connectors
between the
indoor unit control
YES
PCB (A1P) and the fan
PCB (A2P) are
disconnected.
NO
The
fuse (F3U,
NO
white) on the fan
PCB (A2P) has no
continuity.
YES
The
fan can be
moved lightly by
NO
hand after the fan
motor connector of the
fan PCB (A2P) is
removed.
YES
YES
The
resistance
between the
power wire terminals
YES
of the fan motor and
motor frame (metal
part) is 1 MΩ
or below.
NO
CHECK 16
Remove the power wire
connector from the fan
motor and measure the
resistance between U
and V, V and W, and W
and U phases.
Go to the next page.
A
Troubleshooting by Error Code
Remove the foreign matter.
Connect the connector correctly.
Connect the connector correctly.
Replace the fan PCB (A2P).
Replace the indoor fan motor (M1F).
Replace the indoor fan motor (M1F).
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