Kohler — High and Low Battery Voltage Indicator Adjustment
Adjustments · Microcomputer Controller Board
From a Kohler service manual covering: CSG-649, Cummins 4B, Cummins 6B, Ford CSG-649, Ford LSG-423, Ford LSG-875, LSG-423, lsg-875. Check it applies to your exact model before use.
Applies to: Ford CSG-649, Cummins/Onan LSG-423, Cummins/Onan lsg-875
Procedure
- Move Generator Master Switch to AUTO position. SYSTEM READY lamp should go on.
- Rotate potentiometers R42 (High Batt. Volts) and R25 (Low Batt. Volts) fully counterclockwise.
- Set DC power supply at 10 volts (20 volts for 24-volt units). Slowly rotate pot R25 clockwise until BAT. LOW VOLTS lamp lights.
- Set DC power supply at 15 volts (30 volts for 24-volt units). Slowly rotate pot R42 clockwise until BAT. HIGH VOLTS lamp lights.
- Set DC power supply between 10 to 15 volts (20 to 30 volts for 24-volt units). SYSTEM READY lamp should be on.
- Seal pots after settings have been established.
Tools required
- DC power supply Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- 10 V low (12 V systems)
- 20 V low (24 V systems)
- 15 V high (12 V systems)
- 30 V high (24 V systems)
Full service-parts list: Ford CSG-649 →, Cummins/Onan lsg-875 →
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.