Kohler MPAC 1200 / MPAC 1500 — Wire Insulation Breakdown Test Procedure
Maintenance · Wire and cable insulation
For the Kohler MPAC 1200 / MPAC 1500, from the Kohler service manual.
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Before you start
- Hazardous voltage. Disconnect all power sources before opening the enclosure.
Procedure
- Disconnect all power sources and the load; disconnect the wiring harness from the controller at connector P1.
- Use a hi-pot tester or meggar to check insulation resistance phase-to-phase, phase-to-neutral, and phase-to-ground.
- For a hi-pot tester, the maximum potential is 500 VAC and the maximum test time is 1 second.
- Verify that measured insulation resistance exceeds 1.24 megohms.
- If insulation breakdown or resistance less than 1.24 megohms, isolate leakage current and replace faulty components.
Tools required
- Hi-pot tester or meggar Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Insulation resistance must exceed 1.24 megohms
- Hi-pot maximum potential 500 VAC, maximum test time 1 second
Source: Kohler service manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.