Daikin VRV III RQQ8-48PY1 - Page 146

Penyelesaian Masalah Menggunakan Remote Kontrol
Si341213
Diagnosis Servis
136
CHECK 4
Power Transistor Check
Perform the following procedures prior to check.
(1) Power OFF.
(2) Remove all the wiring connected to the PCB where power transistors are mounted on.
[Preparation]
·
Tester
 Preparing a tester in the analog system is recommended.
A tester in the digital system with diode check function will
be usable.
[Point of Measurement and Judgement Criteria]
·
Measure the resistance value using a tester at each point of measurement below, after 10 minutes power OFF.
To use analog tester:
Measurement in the resistance value mode in the range of
multiplying 1k.
To use digital tester:
Measurement is executed in the diode check mode. ( )
[PCB and Circuit Diagram]
No.
Point of Measurement
Judgement Criteria
Remarks
+
–
1
P2
U
1.2V and over
Due to condenser charge
and so on, resistance
measurement may require
some time.
2
P2
V
3
P2
W
4
U
P2
0.3 ~ 0.7V
5
V
P2
6
W
P2
7
N3
U
8
N3
V
9
N3
W
10
U
N3
1.2V and over
Due to condenser charge
and so on, resistance
measurement may require
some time.
11
V
N3
12
W
N3
No.
Point of Measurement
Judgement Criteria
Remarks
+
–
1
P2
U
2 ~ 15k
2
P2
V
3
P2
W
4
U
P2
15k and
above
(including )
Due to condenser charge
and so on, resistance
measurement may require
some time.
5
V
P2
6
W
P2
7
N3
U
8
N3
V
9
N3
W
10
U
N3
2 ~ 15k
11
V
N3
12
W
N3
U V
W
L1A L2A L3A
N3
P2
P1
N3