Winco MD25K/C - Manual (Page 6)

Page 4 41821 60706-120
coolant temperature gauge indicates engine coolant
temperature. The gauge serves a dual function. In
addition to displaying the water temperature it also
provides the shutdown signal to the engine control
module if the water temperature gets too high. The
shutdown signal is preset to operate at 225 f (407 k)
c. Battery Voltage Meter - This DC voltmeter monitors
the VOLTAGE of the battery under static (at rest)
conditions, and under cranking and charging conditions.
The voltmeter indicates not only the condition of the
charging system, but also indicates the battery reserve
under cranking load in cold weather.
d. Running Time Meter - This DC meter records the
total hours the engine has run.
6. A.C. Generator Controls
a. Voltage adjust rheostat - Controls the output voltage
of the generator by varying voltage regulators reference
voltage.
b. Field circuit breaker (FCB) - Protects voltage regula-
tor and exciter field in the event of a load short circuit or
equipment malfunction.
c. Voltage selector power switch - This heavy duty three
position switch allows the operator to quickly and safely
reconnect the 12 wire generator to any one of three
output voltages. Once the output voltage is selected, the
switch may be locked to prevent it from accidentally
being changed during operation. Three output voltage
combinations are available with this selector switch:
1. 120/240 Three Phase* (series Delta configuration)
2. 120/208 Three Phase (Low or Parallel “WYE” configu-
ration)
3. 277/480 Three Phase (High or series “WYE” configu-
ration)
*This selector position is also used for single phase 120/
240 output by using only the L1 and L2 leads. The three
phase L3 output lead is the “wild” leg in the delta
configuration.
5. AC Generator Instruments
a. VM/AM Selector Switch - This selector switch allows
you to check the amperage being drawn from each
generator leg and your line to line voltage.
a. AC Voltmeter (VM) - Monitors generator output line to
line voltage, for all voltage operations.
b. AC Ammeter (AM) - Monitors the amperage that is
being drawn from each leg of the generator.
c. AC Frequency Meter - Monitors the generator fre-
quency.
7. Warning Light Cluster - This light cluster contains
the indicator lamps for the four engine shutdowns
controlled by the engine control module. The lamps will
stay lit after a shutdown until the selector switch has
been moved to the off position. All the shutdowns are
reset when the selector switch is turned off or the DC
circuit breaker is turned off.
a. Low Oil Pressure Lamp (LOP) - Indicates that the
unit did not maintain a minimum oil pressure of 15 psi.
b. High Water Temperature Lamp (HWT) - Indicates
the coolant temperature in the engine exceeded upper
coolant temperature limits.
c. Overspeed Lamp (OS) - Indicates the engine speed
exceeded the allowable speed limit while operating. An
OS light may also indicate that the ECM has lost its
frequency sensing signal (from the engine alternator)
during the last run period.
d. Overcrank Lamp (OC) - Indicates the engine tried to
start and went through five (5) twelve (12) second crank
cycles without starting. Before attempting to restart the
unit, first investigate why it didn’t start.
e. Lamp Test Switch - The lights can be tested by
pressing the lamp test switch. When depressed all four
lights will come on. As soon as the switch is released the
light will go out.
8. Panel Light - A panel light is provided for your
convenience. It is activated by the panel light switch.
9. Receptacles and Circuit Breakers - All of the
receptacles on the panel are protected by circuit break-
ers.
a. 120 Volt 20 Amp Ground Fault Interputer Duplex.
This duplex receptacle is protected by a 20 Amp circuit
breaker mounted just above the duplex. With the “T”
slot design both 15 and 20 amp 120 volt cords can be
plugged in.
b. 120 Volt 20 Amp 3 wire twist lock, Nema Spec L5-20.
This twistlock receptacle is also protected by a 20 Amp
circuit breaker. This receptacle is wired in series with
the GFCI receptacle which provides it with GFCI
protection.
c. 240 Volt 20 Amp 3 wire twist lock, Nema Spec L6-20.
This twistlock receptacle is protected by a two pole 240
volt circuit breaker.
d. 120/240 Volt 50 Amp 4 wire twistlock. This receptacle
is rated for dual voltage, 120 or 240 volt use. It is a four
wire receptacle, with a center grounding pin. Four wire