Daikin REYQ8-48PY1B, Руководство по обслуживанию

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SiBE37-701_B Troubleshooting (OP: Unified ON/OFF Controller)
Troubleshooting 384
[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, 10 minutes later after power OFF.
To use analog tester:
Measurement in the resistance value mode in the range of
multiplying 1k
Ω
.
To use digital tester:
Measurement is executed in the diode check mode. (
)
No.
Point of Measurement
Judgement
Criteria
Remarks No.
Point of Measurement
Judgement
Criteria
Remarks
+ – + –
1 P2 U
2 ~ 15k
Ω
1 P2 U
1.2V and over
Due to condenser charge and
so on, resistance measurement
may require some time.
2 P2 V 2 P2 V
3 P2 W 3 P2 W
4 U P2
15k
Ω
and
above
(including
∞
)
Due to condenser
charge and so on,
resistance
measurement may
require some time.
4 U P2
0.3 ~ 0.7V
5 V P2 5 V P2
6 W P2 6 W P2
7 N3 U 7 N3 U
8 N3 V 8 N3 V
9 N3 W 9 N3 W
10 U N3
2 ~ 15k
Ω
10 U N3
1.2V and over
Due to condenser charge and
so on, resistance measurement
may require some time.
11 V N3 11 V N3
12 W N3 12 W N3
[PCB and Circuit Diagram]
J1
J2
J3
P1 P3
N3 U
V
W
DM
P1 P2 P3
IGBT
X10A K2
L1
L2
L3
J1
J2
J3
N3
X11A
U V W