Code	Symptom	Cause	Remedy
	Red LED stays on for more than 24 hours	One or more defective or damaged cells.	Load test the battery and replace if necessary.
	The battery charger has reduced its output voltage below the normal level due to a DC overload or a DC short.		Remove the source of the overload or short. Disconnect the battery charger’s black (negative) ring terminal from the battery. Reapply AC power and the green LED only should now light.
	The on-board DC systems are drawing more current than the battery charger can replace.		Turn off all DC equipment while charging.
Red and Green LEDs stay on for more than 24 hours	The on-board DC systems are drawing between 1.5 and 5 amps.		Turn off all DC equipment while charging.
	One or more defective or damaged battery cells.		Load test the battery and replace if necessary.
	Extremely low AC voltage at the battery charger.		Apply a higher AC voltage source, reduce the length of the power cord, or increase the power cord wire size (gauge).
	Green LED stays on when the battery is known to be low.	Faulty or contaminated terminal connections.	Clean and tighten or repair all terminal connections.
	One or more defective or damaged cells.		Load test the battery and replace if necessary.
	Neither of the LEDs turn on when the AC power is applied	No AC power is available at the battery charger.	Connect AC power or reset the AC circuit breaker on the main panel.
	Component failure.		Return battery charger to an authorized distributor/dealer for repair.

Symptom → cause → remedy extracted from this unit’s service/owner documentation; verify against the official manual before servicing.

Kohler S — transfer switch. Specifications and parts compiled from manufacturer documents.

Kohler S Transfer Switch