Daikin REYQ72 Serveice Manual page 254

SiUS39-602
Power Transistor
IGBT (On Inverter
PC Board)
(Decision)
If other than given above, the power unit is defective and must be replaced.
If using a digital tester, ∞ and continuity may be reversed.
Note:
Diode Module
(Decision)
If other than given above, the diode module is defective and must be replaced.
If using a digital tester, ∞ and continuity may be reversed.
Note:
Appendix
Method of Replacing The Inverter's Power Transistors and Diode Modules
243