Xtreme Power Conversion Corporation
M90 & M90L Service Manual
Page 24
Uninterruptible Power Supply
R17,R49,R13,R45,R9,R29,R5,R25,R1
,R21, R20, 52,R16,R48,R12,R32,R8,R2
8,R4,R24, R18,R19,R50,R51,R14,R46,R
15,R47,R10,R30,R11,R31,R6,R26,R7,R
27,R2,R22,R3,R23
Resistance
162kΩ±0.1%
Value change
Note: If IGBT is OK, but the parameter is not close to the reference value, it is very possible that the correspond
-
ing driver is damaged, so please try to change the IGBT driver component.
Major parameters of INVERTER Board section
The most likely problems occur on Inverter board section including: broken IGBT, broken Diode and broken IGBT
driver resistor.
Inverter Board
Checked components
Instrument function
Reference
Failed
R3,R12,R11,R16,R22,R26,R32,R36,R
45,R44,R49,R58,R57,R62,R68,R72,R7
8,R82,R91,R90,R97,R107,R106,R114
,R120, R124,R130,R134,R143,R142
Resistance
15Ω±1%
Value change
R4, R13, R8, R17, R23, R27, R33, R37,
R46, R42, R50, R59, R54, R63, R69,
R73, R79, R83, R92, R88, R98, R108,
R103, R115, R121, R125, R131, R135,
R144,R140
Resistance
3Ω±1%
Value change
R10,R9,R7,R18,R21,R31,R28,R43, R38,
R41, R56, R55, R53, R67, R64, R77,
R74, R89, R84, R87, R104
,R105, R102,R119,R116,R129, R126,
R141, R136 , R139
Resistance
49.9kΩ±1%
Value change
IGBT1,IGBT2,Q1,IGBT3,OGBT4
,IGBT5, IGBT6, IGBT7, IGBT8, Q2
, IGBT9, IGBT10, Q3, IGBT12, IGBT11,
IGBT14, IGBT13, IGBT10, IGBT15, Q4,
Q5, IGBT18, IGBT17, IGBT19, IGBT20,
IGBT22, IGBT21, IGBT24,
IGBT23
(C,E) Diode
Voltage Droop
•2.0V
Short or open
(G,E) Resistance
>25kΩ
Short or open
Note: If IGBT is OK, but the parameter is not close to the reference value, it is very possible that the correspond
-
ing driver is damaged, so please try to change the IGBT driver component.
