CONTROL PANEL (TYPE 3)
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 engine
fault light (ENFL) and 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. (RR1) 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.
Engine fault light (ENFL) and the 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.
This will prevent the engine from starting it (ENFL) is pushed.
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.
Push and release engine fault light (ENFL). This will open
(ENFL) contacts for a moment and deenergize the indicating
relay. The indicating relay contacts will open and de-energize
engine fault light (ENFL) and 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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