Fujitsu ASTG30KMTC Service Manual page 122

Check point 2
4 Set tester to the diode mode, and measure the voltage value between the following terminals.
5 Judge the result of 4 as follows:
Terminal
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
5-7. IPM on transistor PCB
Tester screen
∞
0.3 to 0.7 V
∞
- (03-84) -
5. Service parts information