Pre-Charge Voltage Error on a C-Arm? 3 Common Reasons Why!
Matt Lenart: March 13, 2025
Getting a pre-charge voltage error right away on your OEC C-arm definitely throws a wrench into your plans for the day. But luckily for you, we've got a troubleshooting guide that will guide you through the three issues it could be and ways to fix each one.
2. Low or Dead Generator Batteries
3. Battery Charger Board Gone Bad
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1. The Circuit Breaker
The first thing to check is if the circuit breaker is turned off. Many times it gets bumped by accident and it's a quick fix.
The breaker is located on the underside, just below the brake pedal. Pull the breaker towards you to turn it back on.
Then go to your workstation here and reboot the system. If that doesn't fix it, you'll want to test the batteries.
2. Low or Dead Generator Batteries (Most Common Problem)
If the circuit breaker wasn't the fix, the most common issue is that the system's generator batteries are probably too low, or they're dead entirely.
But how do you figure out which it is?
Here's how to replace generator batteries and test the ones that you have before checking to see if the Battery Charger Board has gone bad:
3. Battery Charger Board Gone Bad
To see if the Battery Charger Board is the issue, make sure that you remove the cover on top of the batteries. For detailed instructions on how to do that, check out the video in the previous section.
There's a chance that the battery Charger Board may be bad, which didn't not allow the batteries to charge, in which case you will need to replace the board.
Best of luck on your C-arm repair journey!
