CONTROL PANEL (TYPE 4)
SYSTEMS OPERATION
Shutdown Caused by Engine Failure
The packaged generator set has shutdown sensors, shutdown
indicators and shutdown circuit for the conditions that follow.
1. Low oil pressure
2. High water temperature
3. Overspeed
4. Overcrank
For information about overcrank shutdown, make reference to ENGINE
DOES NOT START.
Conditions (1, 2 or 3) will energize its respective indicating relay. The
number (2) contacts of the respective relay will close to energize shut-off
relay (SR). The number ( 1) contacts of the respective relay will close to
lock in the relay.
When shutdown relay (SR) is energized, (SR) contacts open. This de-
energizes run relay (RR). Contacts (RR2) close and contacts (RR1)
open. (RR2) closed completes a circuit to shut-off solenoid (SS) until
pressure switch (PSW) opens. (RR I) open de-energizes arming relay
(AR) and dual speed switch (DSS).
Diode (D1) helps prevent electrical sparks (arcing) at the contacts in
the shut-off solenoid circuit, when the shut-off solenoid is de-energized.
Indicating relay for the fault condition will give light. To start the
engine, do the steps that follow.
1.
Turn engine control switch (ACS) to OFF or STOP.
NOTE: For start up when (OCIR) indicating relay gives light,
make reference to ENGINE DOES NOT START.
2.
Correct the problem that caused the engine to shutdown.
3.
Rotate ACS to OFF RESET position. This de-energizes the
indicating relay. The indicating relay contacts will open and de-
energize the shutdown relay (SR).
NOTE: Reset oil pressure or overspeed switch if necessary.
The system is ready to start if engine control switch (ACS)
is turned to MAN or AUTO.
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