Troubleshooting Main Contactor, K1; Figure 7. Main Contactor, K1 - Webasto PosiCharge DVS Field Service Manual

DVS/GSE
Turn off power to the DVS at the utility disconnect. Lock and tag disconnect. Using an approved
fuse-pulling tool, remove fuses F1, F2 and F3. Check continuity using a multimeter. Replace
any blown fuses with WCSI Part #06790, FUSE,MIDGET,SLO-BLO,0.5AMP,600VA. Look for
signs of improper wiring, damaged components or loose connectors, because these are the most
likely causes of a blown fuse.
3.4.5

Troubleshooting Main Contactor, K1

Turn off power to the DVS at the utility disconnect. Lock and tag disconnect. Visually inspect
contactor for signs of damage. Simultaneously push both manual test tabs on the sides of the
contactor K1 back and forth to make sure that the contact has not "welded shut" and there is
nothing blocking proper movement. Check all wiring connections to make sure there are no loose
or faulty connections.
USE EXTREME CAUTION WHEN TROUBLESHOOTING DVS
EQUIPMENT WITH ANY PANEL REMOVED. ELECTRIC SHOCK
CAN KILL: Touching live electrical parts can cause fatal shocks or severe
burns. The input power circuitry and internal circuit s are live whenever input
DANGER
power is on.
09030-78B

Figure 7. Main Contactor, K1

38 49
of
DVS
GSE Field Service Manual
Webasto Charging Systems, Inc.