Controller Installation
2-9
2
Motion 4000
Check for Shorts to Ground
Check for shorts to ground before powering up the system. Power must be OFF at the main
disconnect. If any shorts to ground are discovered, they must be corrected before proceeding.
A short to ground is defined as having a resistance of less than 20 ohms between ground and the
terminal being tested.
Be certain that power is OFF at the main disconnect before proceeding.
1. Disengage all 2 Bus fuses.
2. Measure the resistance between the 1 Bus (common) and all field connection terminals.
3. Check for shorts to ground on motor power terminals L1, L2, and L3.
4. Check for shorts to ground on brake terminals B1 and B2, EB1, and EB2 (as applicable).
5. If no shorts to ground are discovered, re-engage the fuses.
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