AYXP12JHRN
3 – 10
5. IPM check method
Turn off the power, let the large capacity electrolytic capacitor (C10) discharge completely, and dismount the IPM. Then, using a tester, check leak
current between C and E.
When using a digital tester, the (+) and (-) tester lead wires in the table must be reversed.
Values in ( ) are for digital tester.
5.1. IPM internal circuit diagram
[7] OUTDOOR UNIT CHECK METHOD
After repairing the outdoor unit, conduct the following inspection procedures to make sure that it has been repaired completely. Then, operate the
compressor for a final operation check.
1. Checking procedures
Needle-type tester
Normal resistance value
(-)
(+)
P
N
∞
(several M
Ω
)
U
V
W
Needle-type tester
Normal resistance value
(-)
(+)
U
N
∞
(several M
Ω
)
V
W
No
.
Item
Check method
Normal value/condition
Remedy
1
Preparation
Disconnect compressor cords (white,
orange, red: 3 wires) from compres-
sor terminals, and connect simulated
load (lamp used as load).
Operate air conditioner in cooling or
heating test operation mode.
2
Inverter DC power supply
voltage check
Measure DC voltage between IPM
pins (20) and (24).
320 VDC
Replace control PWB.
Replace diode bridge.
Correct soldered section of Fas-
ten tabs (BT1,2,5,6,10,11,
JPL1,2,5,6) on control PWB.
(Repair solder cracks.)
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