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TP-6161

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Section 2 Operation

Use the following procedure to restart the generator set
after shutdown by an emergency stop switch. Refer to
Section 2.3.5, Controller Resetting After a Fault
Shutdown, to restart the generator set following a fault
shutdown.

Emergency Stop Switch Resetting Procedure

1. Investigate the cause of the emergency stop and

correct the circuit or wiring problem(s).

2. If the remote emergency stop switch was activated,

reset the switch by replacing the glass piece. If the
controller-mounted

emergency

stop

switch

(if

equipped) was activated, reset the controller
emergency stop switch by rotating the switch
clockwise until it springs back to its original position.

Note:

The controller auxiliary fault lamp lights if the
generator set master switch is in the RUN or
AUTO

position

during

the

resetting

procedure.

3. Toggle the generator set master switch to the

OFF/RESET position and then to the RUN or
AUTO position to restart the generator set. The
generator set does not crank until the resetting
procedure is completed.

2.3.4

Fault Shutdowns

The generator set shuts down automatically under the
fault conditions listed in Figure 2-2.

2.3.5

Controller Resetting After a Fault
Shutdown

Use the following procedure to restart the generator set
after a fault shutdown.

Refer to Section 2.3.3,

Emergency Stopping, to reset the generator set after an
emergency stop.

1. Move the controller alarm horn switch to the

SILENCE position. If equipped, the audiovisual
annunciator alarm horn and lamp are activated.
Move the audiovisual annunciator alarm switch to
SILENCE to stop the alarm horn. The audiovisual
annunciator lamp stays lit.

2. Disconnect the generator set from the load by

using the line circuit breaker or the automatic
transfer switch.

3. Correct the cause of fault shutdown.

See the

Safety Precautions section of this manual before
proceeding.

Fault

Description

High engine
temperature

The high engine temperature shutdown shuts
down the unit 5 seconds after a fault. The
shutdown does not function during the first
30 seconds following startup.

Note:

The high

temperature shutdown functions only when the
coolant level is in the operating range.

Low coolant
level, if
equipped

The low coolant level shutdown shuts down the
unit 5 seconds after the fault. The shutdown
does not function during the first 30 seconds
following startup.

Low oil
pressure

The low oil pressure shutdown shuts down the
unit 5 seconds after fault detection. The
shutdown does not function during the first 30
seconds following startup.

Note:

The low oil

pressure shutdown does not protect against low
oil level. Check the oil level at the engine.

Overcrank

Overcrank shuts down the unit after 45 seconds of
continuous cranking. Shutdown occurs after
75 seconds of cyclic cranking (crank 15 seconds,
reset 15 seconds, crank 15 seconds, etc., for a
total of 75 seconds). Shutdown occurs after
15 seconds if the engine or starter does not turn
(locked rotor).

Note:

The controller has an

automatic restart function. The generator set
attempts to restart if the engine speed drops
below 390 rpm (output frequency of 13 Hz).
Continued low engine speed causes an overcrank
fault condition.

Overspeed

Overspeed shuts down the unit immediately when
governed frequency on 50/60 Hz models exceeds
60/70 Hz.

Note:

The controller circuit board DIP

switches allow 50 Hz (60 Hz shutdown) or 60 Hz
(70 Hz shutdown) selection.

Overvoltage,
if equipped

Overvoltage shuts down the unit and lights the
auxiliary lamp when voltage is at least 15% over
the nominal voltage for longer than 2 seconds.

Note:

Overvoltage can damage sensitive

equipment in less than 1 second. Provide
separate overvoltage protection for online
equipment requiring faster shutdowns.

Figure 2-2

Fault Shutdowns