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OPERATION
The prime mover utilized in this power generating system is controlled via an engine control module.
Starting is accomplished by commanding the control to ”start” the engine. This command can be
given by a number of controls.
? The operator control mounted on the front panel.
? The remote controls via the transfer switch or remote start terminal closure.
Initially, the system may be started and operated by placing the operator control in the ”manual/run”
position. To cease operation, return the switch to the ”off” position.
NOTE: Clear unit of all loose objects and perform all ”pre–start” procedures before operating
generator system.
ENGINE CONTROL MODULE:
The engine control module (ECM) is a microprocessor– based module that monitors the control and
safety inputs and provides all the required START and STOP functions automatically.
The following front panel controls and instruments are wired into the microprocessor through the
ECM terminal blocks:
1. Run–Off–Auto Switch
a. * ”Run” – run position causes the generator set to start and run immediately.
b. * ”Auto” – auto position allows unit to be controlled via any remote single–pole ”dry” contact
(transfer switch, etc.). Contact closure causes the unit to start and run, while contact opening causes
unit to shut down after a preset cool down period.
c. ”Off” – unit operation is terminated.
* – units equipped with Isuzu engines may have a time delay glow plug cycle before starting.
2. Lamp Test
Push button energizes all alarm lights simultaneously. This feature is disabled with the
run–stop–auto switch in the ”stop” position, and has no other effect on unit operation.
SAFETY INPUTS
1. Low Oil Pressure Shutdown – (LOP)
Monitoring of oil pressure begins for a preset time after unit starts and remains in effect until
unit is shut down (except as noted in ”loss of frequency input” below). The LOP signal is derived
from an oil pressure switch gauge mounted on the control panel
2. High Temperature Shutdown – (HT)
The engine temperature monitoring begins immediately with the start signal. However, if engine
temperature is excessive prior to start (i.e., heat soak after shutdown), the unit is permitted to
start.
The high temperature condition is permitted to exist for up to 60 seconds after the unit is running
before shutdown when alarm occurs. If the excessive temperature condition is corrected within
that time period, the HT circuit reverts to normal monitoring. The HT signal is derived from a
monitoring device located on the prime mover.