Kohler 3.5CFZ, 4CZ, 5CFZ, 6.5CZ Circuit Protection, Engine Safety Shutdown Switches

Circuit Protection

AC Circuit Breaker (Optional)

The optional AC circuit breaker(s) located on the front panel of the controller protect the generator output windings. If a load circuit loses power, the cause may be a tripped AC circuit breaker. If a tripped circuit breaker is reset and then trips again, find and correct the short in the load circuit that is causing the problem.

Input (Controller) Fuse (10 Amp)

The input fuse protects the controller circuitry. If the generator set engine will not crank and the battery and battery connections appear okay, the input fuse may be blown. If this fuse, located on the front panel of the controller, is replaced and then blows again, find and correct the short that is causing the problem.

Battery-Charging Fuse (10 Amp)

The battery-charging fuse protects the battery-charging circuit. If the battery goes dead and the battery and battery-charging alternator are otherwise normal, the battery-charging fuse may be blown. If this fuse, located on the front panel of the controller, is replaced and blows again, find and correct the short in the charging circuit that is causing the problem.

NOTE

When a fuse replacement is required, be sure fuse has the same ampere rating and is the same type (for example: ABC or 3AB, ceramic). Do not substitute “clear” glass-type fuses for ceramic fuses. If ampere rating is unknown or questionable, see Wiring Diagram.

WARNING

Accidental starting.

Can cause severe injury or death.

Disconnect battery cables before working on generator set (negative lead first and reconnect it last).

Accidental starting can cause severe injury or

death. Disconnect battery cables (remove negative lead first and reconnect it last) to disable generator set

before working on any equipment connected to generator. The generator set can be started by remote start/stop switch unless this precaution is followed.

Engine Safety

Shutdown Switches

The engine is protected by three engine safety shutdown switches. Activating any of these switches while the generator set is running, results in an immediate, automatic shutdown. During start-up, the engine safety shutdown feature is inhibited until a generator output is sensed in order to allow the oil pump output to reach normal operating pressure.

Low Oil Pressure Shutdown Switch

The low oil pressure shutdown switch protects the engine against internal damage, if the oil pressure drops below 20 psi (138 kPa), due to an engine oil pump failure or other engine malfunction. The location of the low oil pressure shutdown switch is shown in Figure 2-2.

NOTE

The low oil pressure shutdown switch does not act as a low oil level switch. The only way to protect against engine damage due to low oil level is to check the oil level regularly.

1

258000-D

1. Low Oil Pressure Shutdown Switch

Figure 2-2. Low Oil Pressure Shutdown Switch

2-4 Operation TP-5695 12/93