Daikin J Series Service Manual page 123

SiBE041012
5.1.12 Main Circuit Short Check
Check No.29
Note: Check to make sure that the voltage between (+) and (–) of the diode bridge (DB1) is approx.
0 V before checking.
(–) terminal of the tester
(in case of digital,
(+) terminal)
(+) terminal of the tester
(in case of digital,
(–) terminal)
Resistance in OK
Resistance in NG
Service Diagnosis
Measure the resistance between the pins of the DB1 as below.
If the resistance is ∞ or less than 1 k Ω , short circuit occurs on the main circuit.
~ +
(2, 3) (4)
+ ~
(4) (2, 3)
several kΩ
∞
~ several MΩ
∞
0 Ω or
0
Check
–
~
(1)
(2, 3)
–
~
(1)
(2, 3)
several kΩ
∞
~ several MΩ
∞
0 Ω or
0
1
Tester
2
3
4
(R12035)
113