LSIS sv-ip5a User Manual

Chapter 7 - Troubleshooting & Maintenance
7-7
2) Diode module and IGBT module check (37~ 90kW)
 Turn the power off and disconnect RST/UVW wiring.
 Determine whether inverter terminals (R,S,T, U, V, W, P1(or P2),N) are energized or not using a tester.
 Wait until the Main Electrolytic Capacitors (DCP-DCN) is discharged to a safe level.
 Enormous amount of value such as Mega will be displayed when Open. When closed, the resistance
value ranges from a few ohms to tens of Ω. Sometimes, it seems to be closed due to electrolytic
capacitors but soon to be displayed mega value resistance.
 The displayed value is not always the same according to modules and tester types but should be similar.
 Modules number and checking point
Test polarity Test polarity
Module
+ -
Check
value
Number
+ -
Check
value
R DCP+ Closed R N Open
D1
DCP+ R Open
D4
N R Closed
S N Open T N Open
Diode
D5
N S Closed
D6
N T Closed
U DCP Closed U N Open
Tr1
DCP U Open
Tr4
N U Closed
V DCP Closed V N Open
Tr3
DCP V Open
Tr6
N V Closed
W DCP Closed W N Open
IGBT
Tr5
DCP W Open
Tr2
N W Closed
Charge
resistor
R
S
T
U
V
W
SCR1
+
Electrolytic
capacitor
DCP
N
Tr3
Tr6
Tr5
Tr2
Tr1
Tr4
DCP+
SCR2
SCR3
D4
D5
D6
Charge
diode
D1

LSIS sv-ip5a Specifications

General

Brand	LSIS
Model	sv-ip5a
Category	Controller
Language	English