Daikin VRV II RXYQ5MY1B Service Manual page 326

SiE39-404
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
P3 U
Continuity
V
"
"
W
"
"
(Approx. 100k )
N
"
Approx. 4k ¡
U P3
V
"
"
W
"
"
N (Approx. 160k )
"
P1 L1 Continuity
P1 L2
"
P1 L3
"
L1 P1
L2 P1
L3 P1
N3 U
V
"
W
"
N
"
U N3
V
"
W
"
N
"
N3 L1
L2
"
L3
"
L1 N3
Continuity
L2
" "
L3
" "
Approx. 4k ¡
"
"
(Approx. 250k )
Continuity
In the case of continuity,
the resistance must be
"
the same for all phases.
"
(Approx. 100k )
315