Daikin VRV EMERION RXYQ-AATJA, Service Manual

Page: 383 / 429

SiUS342303E Check
Part 6 Service Diagnosis 376
4.4 Power Transistor Check
CHECK 4
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.
PCB and Circuit Diagram
 RXYQ96/120AATJ* (M1C, M2C), RXYQ144/168AATJ* (M1C)
Preparation
h Multimeter

Prepare the analog type of multimeter.
For the digital type of multimeter, those with diode
check function are available for the checking.
Point of Measurement and Judgment Criteria
 Turn OFF the power supply. Then, after a lapse of 10 minutes or more, make measurement of
resistance.
No.
Measuring
point
When using the analog type of multimeter,
make measurement in resistance
measurement mode in the x1 k

range.
When using the digital type of multimeter,
make measurement in diode check mode
( ).
+ – Judgement Criteria Remarks Judgement Criteria Remarks
1 P2 U
50 k

~ 500 k

— OL
Due to condenser
charge and so on,
resistance
measurement may
require some time.
2 P2 V
3 P2 W
4 U P2
50 k

and more
(including

)
Due to condenser
charge and so on,
resistance
measurement may
require some time.
0.3 ~ 0.7 V —
5 V P2
6 W P2
7 N31 U
8 N31 V
9 N31 W
10 U N31
50 k

~ 500 k

— OL
Due to condenser
charge and so on,
resistance
measurement may
require some time.
11 V N31
12 W N31
95
95
36
/% /% /%
3 3
&
&
5
)8
.5
3
3
1
;$
;$
+$3
8 9 :
9'
:+7 :+7
;$
:+7
1
;$
;$
;$
;$
W V U
P2
N32
230 V 100P