Kohler — Controller Replacement Procedure, Models 8/10/12RESV/L
Repair & overhaul
From a Kohler service manual covering: 10RESV, 12RESV, 14RCA, 14RES, 20RCA, 20RES, 24RCL, 30RCL, 38RCL, 38RCLB, 48RCL, 48RCLB…. Check it applies to your exact model before use.
Applies to: Kohler 10RESV, Kohler 12RESV, Kohler 14RCA, Kohler 14RES, Kohler 20RCA, Kohler 20RES, Kohler 24RCL, Kohler 30RCL, Kohler 38RCL, Kohler 38RCLB, Kohler 48RCL, Kohler 48RCLB
Before you start
- Hazardous voltage can cause severe injury or death; disconnect all power sources before opening enclosure
- Accidental starting can cause severe injury or death; disconnect battery cables, negative first
Procedure
- Open enclosure roof using locking tool
- Press OFF button on controller
- Disconnect utility power at building distribution panel; verify off with voltmeter
- Disconnect engine starting battery, negative lead first
- Remove two controller mounting screws and lift bottom edge of controller
- Note connections on back of controller, then disconnect all harnesses and leads
- Remove old controller
- Reconnect all harnesses to new controller assembly
- Install controller onto junction box with the two screws
- Reconnect battery, negative lead last
- Reconnect utility power by closing distribution panel breaker
- Set date/time and exerciser when prompted
- Check and update firmware to latest version via SiteTech or USB utility
- Perform Controller Setup (Section 5)
- Perform Voltage Calibration (Section 6)
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Full service-parts list: Kohler 14RCA →, Kohler 14RES →, Kohler 20RCA →, Kohler 20RES →, Kohler 24RCL →, Kohler 30RCL →, Kohler 38RCL →, Kohler 48RCL →, Kohler 48RCLB →
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.