Replace The Backplane Fuses; Replace Control Power Transformer - Webasto PosiCharge ProCore Service Manual

1.7 REPLACE ThE BACKPLANE FUSES

1. Unplug any vehicles connected to the charger.
2. Turn OFF AC power at the breaker and lock it out.
3. Wait five minutes for capacitor voltages to bleed down.
4. Remove left side panel.
5. See Figure 7. Test each fuse with an ohmmeter.
6. Replace all three fuses due to stress on the others with a correctly-
rated fuse (500V, 20A).
7. Replace left side panel.
8. Remove lock out and turn ON AC power.

1.8 REPLACE CONTROL POWER TRANSFORMER

1. Unplug any vehicles connected to the charger.
2. Turn OFF AC power at the breaker and lock it out.
3. Wait five minutes for capacitor voltages to bleed down.
4. Remove right side panel.
5. The charging module weighs 35 lbs. If you have difficulty holding
that weight, get assistance before you attempt to remove the
module from the cabinet. Slide the module out of the charger.
6. Unplug the five-pin 24V control power cable from backplane.
7. Unscrew mounting nuts from transformer and remove transformer.
8. Install new transformer on mounting studs and replace nuts.
9. Plug control power cable into backplane.
10. Replace module(s), reinstall right side panel, remove lockout, turn
ON AC power.
8
Figure 7: Backplane Fuses