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2.4.2

Stopping Generator Set

Local Stopping

1. Run the generator set with no load for at least

2 minutes to ensure adequate engine cooldown.

2. Move the generator set master switch to the OFF/

RESET position. The engine stops.

Automatic Stopping

With the generator set master switch in the AUTO

position, open the contact across engine start leads 3

and 4 to signal the generator set to stop.

An automatic transfer switch (ATS) connected to

controller leads 3 and 4 operates as follows:

1. The ATS disconnects the load from the generator

set.

2. If the ATS is equipped with an engine cooldown

time delay, the generator set continues to run for a

preset engine cooldown time.

Note: There is no engine cooldown time delay on

the DC-RET controller.

3. The ATS opens the connection between controller

leads 3 and 4. The generator set shuts down. The

controller enters standby mode and displays

engine runtime hours.

2.5 Exercising Generator Set

Operate the generator set without load once each week

for 20 minutes. If the generator set is not connected to

an automatic transfer switch (ATS) with an exercise

option, exercise the unit in the presence of an operator.

The operator should perform all of the prestart checks

before starting the exercise procedure.

generator set according to the starting procedure in the

controller section of this manual. While the generator

set is operating, listen for a smooth-running engine and

visually inspect the generator set for fluid or exhaust

leaks. Check the air inlets and outlets and remove any

items restricting the air flow.

TP-6517 4/09

2.6 Faults

2.6.1

Under the fault shutdown conditions listed in Figure 2-3,

the generator set shuts down automatically and the

controller displays a fault code. The generator set

cannot be restarted until the fault condition is corrected

and the controller is reset. See Section 2.6.3 to reset the

controller after a fault shutdown.

The switches on the generator set will automatically

reset when the problem is corrected. For example, the

high engine temperature switch resets automatically

when the generator set cools. However, the controller

fault does not clear until the controller is reset.

2.6.2

The controller displays a fault code but the generator set

does not shut down on a low battery voltage warning.

The controller resets automatically after a battery

voltage fault condition is corrected.

2.6.3

Always identify and correct the cause of a fault

shutdown before resetting the controller. Check the

fault code displayed on the DC-RET and refer to

Figure 2-3 to identify and correct the fault condition

before proceeding.

Use the following procedure to reset the generator set

controller after a fault shutdown.

1. Move the generator set master switch to OFF/

RESET.

2. Disconnect the generator set from the load using

the line circuit breaker or ATS. See the safety

Start the

precautions at the beginning of this manual before

proceeding.

3. Identify and correct the cause of the fault

shutdown.

beginning of this manual before proceeding. Refer

to Section 5, Troubleshooting.

Shutdowns

Warnings

Resetting Controller after a Fault

Shutdown

See the safety precautions at the

Section 2 Operation