Main Circuit Short Check - Daikin BA-Series Service Manual

Check

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
approximately 0 V before checking.
Negative (–) terminal of multimeter
(positive terminal (+) for digital
multimeter)
Positive (+) terminal of multimeter
(negative terminal (–) for digital
multimeter)
Resistance is OK.
Resistance is NG.
RK(X)S25/35E2V1B
1 2 3
– ~ ~ +
Multimeter
107
Measure the resistance between the pins of the DB1 referring to the table below.
If the resistance is ∞ or less than 1 k Ω , short circuit occurs on the main circuit.
~
(2, 3)
+
(4)
several kΩ
~ several MΩ
0 Ω or
4
+
(4)
~
(2, 3)
∞
∞
0
SiBE05-722ED
–
~
(1)
(2, 3)
–
~
(1)
(2, 3)
several kΩ
∞
~ several MΩ
∞
0 Ω or
0
Service Diagnosis
(R19664)