Kohler — Voltage to the Coil Test Procedure, 100/200 Amp Switches
Testing & diagnosis · Solenoid coils
From a Kohler service manual — check it applies to your exact model before use.
Applies to: Kohler RDT
Before you start
- Only authorized personnel should open the enclosure.
Procedure
- Disconnect leads CE and EL2 (CE2) to the emergency source (lower) coil.
- Set multimeter to store peak voltage; connect across CE and EL2; verify no voltage.
- With switch in normal position, hold Test button 6 seconds to start a loaded test.
- Verify 120 volts applied to CE and EL2 as controller attempts transfer to Emergency.
- Unit should attempt transfer 3 times before failure to transfer fault; reset by holding Test and Exercise 3 seconds.
- Reconnect emergency coil leads; disconnect normal coil leads CN and NL2 (CN2).
- Verify 120 volts applied to CN and NL2 as controller attempts transfer back to normal.
- Disconnect both sources, manually operate to Normal position, reconnect coil leads.
Tools required
- Analog voltmeter or fast (250 microsecond) 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 VAC to solenoid coils
- 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.