Si20-701_B
Troubleshooting by Remote Controller
92
Refer to P.460.
The
resistance
between the
power wire
terminals of the fan
motor and motor
frame (meal part)
is 1 M
Ω
or
below.
YES
Replace the fan
motor.
The
resistors
among U, V, and
W are unbalanced or
short circuited.
NO
Replace the fan
motor.
Between
V
CC
and GND
terminals, and
between GND and H
W
,
H
V
, or H
U
terminals
are short
circuited.
YES
Replace the fan
motor.
A
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 .
NO
Remove the signal
connector from the fan
motor and check the
resistance .
YES
NO
B
CHECK 2
CHECK 2
CHECK 2
resistance