Kohler — Voltage to the Normal Coil Test Procedure, 100/200 Amp Switches
Testing & diagnosis · solenoid coil
From a Kohler service manual — check it applies to your exact model before use.
Applies to: Kohler RDT
Before you start
- Hazardous voltage. Only authorized personnel should open the enclosure.
Procedure
- Disconnect leads CN and CN2 to the Normal source (upper) solenoid coil.
- Connect the voltmeter across leads CN and CN2.
- Press and hold the Test button for 6 seconds to initiate a loaded test; wait for transfer.
- Press the Test button for 2 seconds to stop the test and verify 120 volts applied to CN and CN2 as the controller transfers back.
- Disconnect both sources, manually operate to Normal position, reconnect the coil leads, secure the enclosure door.
Tools required
- analog voltmeter or fast (250 microseconds min/max) digital multimeter with peak recording
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- 120 volts applied to coil leads
- Coils energized approximately 0.5 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.