Carrier D2-3466-2 Input, Meter, Diode, Connection, Component is OK if, resistance R is, Igbt

Table 6.1 – Resistance Checks

Input	Meter
Diode	Connection				Component is OK if
No.	(+)		(-)		resistance (R) is:	Component is defective if:
1	*		SCR1		10 < R < 1 megohm	Continuity (short circuit) or
						open when the meter is
2	*		SCR2
						connected with reversed
3	*		SCR3			polarity.
4	*		SCR4
5	*		SCR5
6	*		SCR6
7	SCR1		**
8	SCR2		**
9	SCR3		**
10	SCR4		**
11	SCR5		**
12	SCR6		**
* (+) DC Bus Volts power terminal
** (-) DC Bus Volts power terminal
				Table 6.1 - Resistance Checks (Continued)
	Meter
IGBT	Connection				Component is OK if
No.	(+)		(-)		resistance (R) is:	Component is defective if:
1	*	W/T3			10 < R < 1 megohm	Continuity (short circuit) or
						open when the meter is
2	*	V/T2
						connected with reversed
3	*	U/T1				polarity.
4	W/T3		**
5	V/T2		**
6	U/T1		**

* (+) DC Bus Volts power terminal ** (-) DC Bus Volts power terminal

Troubleshooting the Drive 6-5