Daikin Aurora Series, Service Manual, Page: 303 / 333

SiUS341802E Check
Service Diagnosis 290
RXLQ72-120TAYCU, RXYQ72-168TAYCU
Point of Measurement and Judgement Criteria
Turn OFF the power supply. Then, after a lapse of 10 minutes or more, make measurement of
resistance.
PCB and Circuit Diagram
When using the analog type of multimeter,
make measurement in resistance
measurement mode in the x1 k
Ω
range.
When using the digital type of multimeter,
make measurement in diode check mode
(
)
No.
Measuring
point
Judgement
criteria
Remarks No.
Measuring
point
Judgement
criteria
Remarks
+ – + –
1 P31 U
2 ~ 30 k
Ω
1 P31 U
1.2 V or
more
Due to condenser
charge and so on,
resistance
measurement may
require some time.
2 P31 V 2 P31 V
3 P31 W 3 P31 W
4 U P31
15 k
Ω
or
more
(including
)
Due to condenser
charge and so on,
resistance
measurement may
require some time.
4 U P31
0.3 ~ 0.7 V
5 V P31 5 V P31
6 W P31 6 W P31
7 N31 U 7 N31 U
8 N31 V 8 N31 V
9 N31 W 9 N31 W
10 U N31
2 ~ 30 k
Ω
10 U N31
1.2 V or
more
Due to condenser
charge and so on,
resistance
measurement may
require some time.
11 V N31 11 V N31
12 W N31 12 W N31
P11 P21
IGBT
U V W
L1B
L2B
L3B
DM
P31
N31
P31 U V W N31