Fujitsu ASU18RLB Service Instructions Manual page 62
Split type room air conditioner wall mounted type inverter
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Also See for ASU18RLB:
- Technical manual (58 pages) ,
- Service manual (18 pages) ,
- Engineering bulletin (2 pages)
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SERVICE PARTS INFORMATION 7
IPM
(
Mounted on Transistor PCB)
Check Point 1 : Check the Transistor of PCB ( for Resistance )
Disconnect the connection wires between the Transistor
PCB - Capacitor PCB and Transistor PCB - Inverter
Compressor.
Set the tester to the "Resistance" mode, and measure
the resistance between the following terminals.
TM301 (P) - TM305(U) / TM304(V) / TM303(W)
TM302 (N) - TM305(U) / TM304(V) / TM303(W)
Judge the result of
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 : Check the Transistor of PCB ( for Diode )
Set the tester to the "Diode" mode, and measure the voltage value between the following terminals.
Judge the result of
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
Resistance value
Over 2k
(Including
)
Over 20k
(Including
)
Over 2k
(Including
)
Tester display
0.3V
0.7V
02-38
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Troubleshooting
