Check SiBE041134
108 Service Diagnosis
5.11 Outdoor Fan System Check
Check No.19 DC motor
5.12 Main Circuit Short Check
Check No.20
Note: Check to make sure that the voltage between (+) and (–) of the diode bridge (DB1) is approx.
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 kΩ, short circuit occurs on the main circuit.
(R15001)
YES
YES
NO
NO
Outdoor fan system is functioning.
Check the outdoor fan system.
Go to Check No. 16.
Outdoor fan running?
Fan motor
lead wire connector
disconnected?
Reconnect the connector.
Negative (–) terminal of
tester (positive terminal
(+) for digital tester)
~ (2, 3) + (4) ~ (2, 3)
– (1)
Positive (+) terminal of
tester (negative terminal
(–) for digital tester)
+ (4) ~ (2, 3)
– (1)
~ (2, 3)
Resistance is OK. several kΩ
~ several MΩ
∞∞
several kΩ
~ several MΩ
Resistance is NG. 0 Ω or
∞ 000 Ω or ∞
(R12035)
Tester
–~~+
1
2
3
4
–
+
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