
Commercial Water
Xylem Inc.
PAGE 7
Check the following values:
Black Wire (GND) Red Wire of Multimeter Result
Rectifier Values
L1
L2 DC+ OL (Overload)
L3
L1
L2 DC– 0.40 - 0.54 V
L3
L1
DC+ L2 0.40 - 0.54 V
L3
L1
DC– L2 OL (Overload)
L3
IGBT Values
U
DC+ V 0.420 - 0.635 V
W
U
DC– V OL (Overload)
W
U
V DC+ OL (Overload)
W
U
V DC- 0.40 - 0.45 V
W
NOTE: Put multimeter on diode check ( ).
Result:
- If the above mentioned values between power supply and DC part are significantly different
=> Rectifier may be damaged.
- If values between motor connection and DC part are significantly different
=> IGBT module may have a failure.
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