Winco MDS50R3/B - Manual (Page 7)

Page 5
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 operat-
ing. 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.
8. Lamp Test Switch (16)- 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.
9. Panel Light (17)(18)- A panel light is provided for
your convenience. It is activated by the panel light switch.
B. RECEPTACLES and CIRCUIT
BREAKERS
1. 120 Volt 20 Amp Ground Fault Interupter 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.
2. 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.
3. 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.
4. 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
drop cords plugged into this receptacle may be split into
120 volt receptacles at a distribution box. This receptacle
is protected by a two pole 50 amp circuit breaker mounted
just above it. THIS RECEPTACLE UTILIZES A SPECIAL
HUBBELL PLUG.(HUBBELL PART NUMBER “CS
6365”.)
C. FULL POWER LOAD CONNECTIONS and
BREAKERS
This Mobile Diesel Power System is equipped with both
high voltage (480) and low voltage (208/240) main line
breakers. The breakers are interlocked with a lockable
bar to insure that only one breaker can be turned on at a
time.
A full power output terminal block is provided. This
terminal block is located below the main power breakers
and is accessible through the access door located just
below the main line breakers. If this access door is
opened with the unit running a safety switch will disable
the 12 volt system shutting the unit down. This door must
remain closed and latched at all times during normal
operations.
DANGER: PERSONAL INJURY
This unit will start as soon as the door is closed if the
start switch is in the run position. Do not use the switch
on this door to shutdown a unit to connect to the full load
terminal block , this is a safety switch only.
D. ENGINE CONTROL MODULE (ECM)
The ECM is a microprocessor based module that con-
trols the complete unit. It monitors all the engine safety
sensors such as oil pressure, water temperature,
overspeed, and overcrank and shuts the unit down
should any one of the sensor circuits show a fault.
1. Control Switch Inputs
The following front panel controls and instruments are
wired into the microprocessor through the ECM terminal
blocks.
a. Run-Off-Auto switch:
1. “Run” - This is your local operation position.
In this position the engine will start immediately.
2.
“Off” - position prevents unit operation by
disconnecting all power to the ECM.
3. “Auto” - position powers up the ECM in a
standby mode. A remote switch closure is
required to activate the start circuits.
2. Safety Inputs:
a. Low oil pressure shutdown -(LOP)- Monitoring of
oil pressure begins 12 seconds after the unit starts, and
remains in effect until unit is shutdown by normal control
circuits (except as noted in “loss of frequency input”
below). The ‘LOP’ signal is derived from an oil pressure
gauge mounted in the engine control panel.