PAGE 30 —MQP20P STANDBY GENERATOR • OPERATION AND PARTS MANUAL — REV. #1 (11/28/11)
PROTECTIVE DEVICES
PROTECTIVE DEVICES
Protection devices and emergency stop devices are
provided for protection of the generator against trouble
during operation. The alarm LED on the digital controller
lights or flashes when a fault is detected.
When a major fault is detected, such as low oil pressure,
high water temperature, and overspeed, the engine
automatically shuts down. Check the display for the fault
and correct the problem.
For minor faults, the engine will continue working. Stop the
engine and remedy the cause of the problem.
Before inspecting or troubleshooting the generator, press
the OFF button on the Digital Controller. Place all circuit
breakers in the OFF position and allow sufficient time for
adequate cooling.
After automatic shutdown, always inspect the generator
and eliminate any problems that might have caused the
shutdown before attempting to restart the generator.
When ready to restart the generator, make sure all circuit
breakers are OFF. Also check and make sure that the OFF
button on the Digital Controller has been pressed to clear
the system and that the OFF LED on the Digital Controller
is RED. Restart the generator as outlined in the Startup
section of this manual.
Refer to the MEC20 Microprocessor Engine/Generator
Controller Manual for detailed information of faults and
display information.
