Check
SiSG121917E
177
Part 6 Service Diagnosis
8.11 Outdoor Fan System Check
Check No.19
DC motor
8.12 Main Circuit Short Check
Check No.20
Check to make sure that the voltage between (+) and (–) of the diode bridge (DB1) is
approximately 0 V before checking.
Measure the resistance between the pins of the DB1 referring to the table below.
If the resistance is
or less than 1 k
, short circuit occurs on the main circuit.
50/65/80 class
(R21195)
YES
N
O
N
O
YES
O
u
tdoor fan system is f
u
nctioning.
Check the o
u
tdoor fan system.
Reconnect the connector.
Is the
o
u
tdoor fan r
u
nning?
Fan motor
lead
w
ire connector
disconnected?
Go to
Check No. 16
.
Positive terminal (+) of
digital multimeter
~ (2, 3)
+ (4)
~ (2, 3)
– (1)
Negative terminal (–) of
digital multimeter
+ (4)
~ (2, 3)
– (1)
~ (2, 3)
Resistance is OK.
several k
~ several M
Resistance is NG.
0
or
M
u
ltimeter
+
~
~
–
4
3
2
1
–
+
(R22377)
