Kohler MPAC 1200 / MPAC 1500 — Power Panel Replacement Procedure
Repair & overhaul
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
- Prevent all connected generator sets from starting; disconnect the starting battery, negative lead first.
- Disconnect primary and emergency power to the transfer switch; open the enclosure.
- Check for zero volts on the normal and emergency power lugs.
- Remove the tie wraps securing the harness; disconnect the power panel harness from the controller harness.
- Disconnect the engine start leads from the ATS engine start terminals.
- Disconnect and mark the emergency, normal, and load cables as they are removed.
- Remove the four nuts securing the power panel.
- Remove the power panel.
- Install the new power panel onto the studs in the back of the enclosure.
- Fasten with flat washers, lock washers and nuts; torque the nuts to 7.3 Nm (65 in. lb.).
- Connect the power panel harness to the controller harness at the inline connector.
- Connect the load cables to the T terminals; tighten to 16.3 Nm (12 ft. lb.).
- Connect the normal cables to the N terminals and emergency cables to the E terminals; tighten to 16.3 Nm (12 ft. lb.).
- Install tie wraps and connect the generator set engine start leads.
- Close the enclosure, reconnect power, enable the generator set, and test operation.
Tools required
- Basic electrician's hand tools
- Digital or analog multimeter Amazon
- Wiring harness Amazon
- Tie wraps Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Torque mounting nuts to 7.3 Nm (65 in. lb.)
- Tighten connecting bolts to 16.3 Nm (12 ft. lb.)
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.