Publication 2364F-5.05 - March 1999
Testing Components
4-13
Testing the Line RC Suppressor
The line RC suppressor discharges excess voltage from the AC lines.
1. Push the disconnect lever to off and wait for all voltage to discharge
from the unit. Do not continue until all voltage has dissipated from the
DC bus.
2. Verify that there is no voltage across the DC bus (see Figure 4.12 and
Figure 4.13 for check points).
3. Verify that there is no voltage across the subcomponents of the
suppressor.
4. Check the board, fuses, and any associated wiring for visible damage
(burn marks, or damaged subcomponents).
5. Remove fuses F14, F15, and F16.
6. Set meter for resistance and test each resistor on the board. Each resistor
should read 670-700 k-ohm (680 k-ohm rating).
7. Reinstall fuses F14, F15, and F16. Check the fuses with a meter.
If the board has failed any of these tests, the board may be damaged.
Replace the board and consider replacing any associated wiring or fuses, as
necessary.
Figure 4.8
Line RC Suppressor
680 k-ohm
Resistor
