I'd noticed that our Silver Leaf system was showing 4-6 volts higher than numerous AC gages placed both on the campground posts and in the RV.
Sure enough, the Surge Guard was responsible; as a result, we'd lose power at night as marginally high campgrounds (two state parks and two private facilities out of about thirty) enjoyed higher voltage due to lower loads.
On the advice of TRC techs, I followed the procedure below, and eliminated the problem:
- Find a source of shore power between 115 & 120VAC.
- Disconnect shore power from rig
- Remove cover from Surge Guard unit
- Locate the two-prong miniature plug labeled J8 along the outside edge of the circuit board
- Connect the two prongs with a small insulated jumper
- Apply shore power
- Disconnect jumper
- Disconnect shore power
- Reconnect shore power
- Verify voltage being read in RV, eg Silver Leaf or Aladin, matches voltage applied
- Disconnect shore power and reinstall cover
Tip: String together extension cords to achieve a lower voltage, and/or place worklights on the same circuit for the same effect, if shore power is above 120 VAC.