Troubleshooting (Controller) - MULTIQUIP Power MQP20P Operation And Parts Manual

Symptom
Engine temperature or oil
pressure display is reading
incorrectly
Engine temperature or oil
displays "9999"
Engine alarms on high
engine temperature or low
oil pressure when engine
is operating within normal
limits
Keys on faceplate do not
operate.
MQp20p STaNDBY geNeRaTOR • OpeRaTiON aND paRTS MaNual — Rev. #1 (11/28/11) — page 39

trOubLEShOOtIng (COntrOLLEr)

Troubleshooting (MeC20 Controller) - continued
possible problem
Improper calibration?
Incorrect engine sensor wiring?
Battery not properly grounded?
Incorrect wiring?
Incorrect resistance?
Improper calibration?
Incorrect wiring?
Incorrect resistance?
Incorrect connection?
Solution
Verify that the controller's analog input has been properly
calibrated as per manual instructions.
Verify that the engine sensor wiring is correct (Note: Use factory-
supplied engine sensors only.)
Verify that the battery supply DC negative conductor is properly
grounded to the engine block (i.e. to a common ground point.)
Check that the wiring from the controller terminal #37 and
#38 to the engine mounted sender is correct (i.e. wiring is
not open or shorted).
Verify that the engine mounter senders have correct
resistance reading for corresponding input temperature or
pressure (refer to Controller manual).
Verify calibration.
Check that the wiring from the controller terminal #37 and
#38 to the engine mounted sender is correct (i.e. wiring is
not open or shorted).
Verify that the engine mounter senders have correct
resistance reading for corresponding input temperature or
pressure (refer to Controller manual).
Verify that the interconnecting ribbon cable between the
faceplate and the main printed circuit board is connected
correctly.