Multiquip DCA-500SSK - CONTROL PANEL, D. Overcrank Shutdown - Indicates the unit has

The definitions below describe the controls and functions of the DCA-500SSK " Control Panel " (Figure 8).

1.Pilot Lamp – Indicates that the generator is working properly.

2.Panel Light – Normally used in dark areas or at night time. When activated, panel lights will illuminate.When lit this light will make it easier to read the meters and gauges. When the generator is not in use be sure to turn the panel light switch to the OFF position.

3.Frequency Meter – Indicates the output frequency in hertz (Hz). Normally 60 Hz ±1 Hz .

4.AC Ammeter – Indicates the amount of current the load is drawing from the generator.

5.AC Voltmeter – Indicates the single phase output voltage present at the UVW terminals. .

6.Ammeter Change-Over Switch – This switch allows the AC ammeter to indicate the current flowing to the load connected to any phase of the output terminals, or to be switched off.

7.Voltmeter Change-Over Switch – This switch allows the AC voltmeter to indicate phase to phase voltage between any two phases of the output terminals or to be switched off

8.Panel Light Switch – When activated, this switch will turn on the luminate the control panel.

9.Voltage Regulator Control – Allows manual adjustment of the generator’s output voltage

10.Main Circuit Breaker – This three-pole, 1400 amp main breaker is provided to protect the UVW voltage output terminals from overload.

DCA-500SSK — CONTROL PANEL

If the engine does not engage (start) by the third attempt, the engine will be shutdown by the MPEC's " Over Crank Protection" mode. If the engine engages at a speed (RPM's) that is not safe, the MPEC will shutdown the engine by initializing the "Over Speed Protection" mode.

Also the MPEC will shutdown the generator in the event of low oil pressure, high coolant temperature, low coolant level, and loss of magnetic pickup. These conditions can be observed by monitoring the LED status indicators on the front of the MPEC module.

A.	Off/Manual/Auto Switch – This switch controls the
	running of the generator. If this switch is left in the "OFF"
	position, the generator will not run. When this switch is
	set to the manual position, the generator will start
	immediately.
	If the generator is to be connected to a building's AC
	power source via a transfer switch (isolation), place
	the switch in the auto position. In this position the
	generator will monitor the	AC line output from the
	building's power source. The generator will engage when
	commercial power falls below a preset level.
B.	Low Oil Pressure – Indicates the engine pressure
	has fallen below 15 psi. The oil pressure is detected
	using variable resistive values from the oil pressure
	sending unit. This is considered a major fault and will
	shut down the generator.
C.	High Coolant Temperature	– Indicates the engine
	temperature has exceeded 215°F. The engine
	temperature is detected using variable resistive values
	from the temperature sending unit. This is considered
	a major fault and will shut down the generator.
D. Overcrank Shutdown – Indicates the unit has

11.MPEC – Microprocessor Engine Control Module – (MPEC) has a vertical row of status LED's (Figure 9), that when lit, indicate that an engine malfunction (fault), has been detected. When a fault has been detected the MPEC will evaluate the fault and if the fault is major will shutdown the generator.

Figure 9. MPEC Module

	attempted to be started a pre- programmed number of
	times, and has failed to start. The number of cycles
	and duration are programmable.Typical programmable
	start settings is 3 cycles with a 10 second duration.
	This is considered a major fault and will shut down
	the generator.
E.	Overspeed Shutdown – Indicates that the engine is
	running at an unsafe speed.This is considered a major
	fault.
F.	Engine Running – Indicates that engine is running at

During cranking cycle , The MPEC will attempt to crank the engine for 10 seconds before disengaging.

a safe operating speed.

DCA-500SSK — PARTS AND OPERATION MANUAL (STD)— REV. #1 (04/14/01) — PAGE 33