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Split system single phase type
2.4.7 Service parts information 7 : IPM (mounted on Transistor PCB, Only
for WO*A080LDC and WO*A100LDT models)
Check point 1
(1) Disconnect the connection wires between the
Transistor PCB – Capacitor PCB and
Transistor PCB – Inverter Compressor.
(2) Set the tester to the "Restistance mode", and
measure the resistance between the following
terminals.
TM301(P) – TM305(U)/TM304(V)/TM303(W)
TM302(P) – TM305(U)/TM304(V)/TM303(W)
(3) Judge the result of (2) as follows :
Terminal
Tester (+)
Tester (-)
P
U
P
V
P
W
U
P
V
P
W
P
N
U
N
V
N
W
U
N
V
N
W
N
Check point 2
(4) Set the tester to the "diode" mode, and measure the voltage value between the following terminals
(5) Judge the result of (4) as follows :
Terminal
Tester (+)
Tester (-)
P
U
P
V
P
W
U
P
V
P
W
P
N
U
N
V
N
W
U
N
V
N
W
N
Maintenance Document 1589-3
Resistance value
Over 2kΩ
(including ∞Ω)
Over 20kΩ
(including ∞Ω)
Over 2kΩ
(including ∞Ω)
Resistance value
∞
0.3V~0.7V
∞
WO*A080LDC
WO*A100LDT
37
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