Check SiUS12-928_B
199 Service Diagnosis
7.12 Outdoor Fan System Check
Check No.19
7.13 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 k, short circuit occurs on the main circuit.
(–) terminal of the tester
(in case of digital,
(+) terminal)
(~) (+) (~) (–)
(+) terminal of the tester
(in case of digital,
(–) terminal)
(+) (~) (–) (~)
Resistance is OK.
several k
~several M
several k
~several M
Resistance is NG. 0 or 0 0 0 or
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