Troubleshooting (Diagnostics) - MQ Power WHISPERWATT Series Operation Manual

The engine controller of this generator diagnoses problems
(faults/errors) that arise from the engine control system and
the engine itself.
When any engine faults occur during operation of the
generator the warning lamp (diagnostic lamp) located on
the control panel will turn on. If this condition occurs please
perform immediately the engine fault code diagnostic
procedure below.
ENGINE FAULT CODE DIAGNOSTIC PROCEDURE
1. Remove all loads from the generator and place all
circuit breakers in the OFF position.
2. Stop the engine.
3. Release the retaining screws that secure the control
panel to the generator frame.
4. Slowly let the control panel fall forward so that the
control box is exposed.
5. To start the diagnostic process, place the diagnostic
switch to the ON (Figure 76) position.
Figure 76. Diagnostic Panel
NOTICE
Make sure to place the diagnostic switch back to
the OFF position after completing engine fault code
diagnostic procedures.
PAGE 48 — DCA40SSKU4F2 60 HZ GENERATOR • OPERATION MANUAL — REV. #2 (08/30/22)

TROUBLESHOOTING (DIAGNOSTICS)

ON
DIAGNOSTIC
SWITCH
OFF
6. Verify that the Engine Shutdown lamp (Figure 77A)
or Engine Pre-Alarm lamp (Figure 77B) is ON. This
indicates that there is a fault/error in the engine or the
engine control system.
WARNING LAMP
UNIT
Figure 77. Engine Warning Lamp Unit
7. Refer to the Engine Instruction Manual for the contents/
locations of the fault and troubleshooting procedures.
NOTICE
For a complete understanding of error codes and
troubleshooting procedures, refer to the enclosed
engine instruction manual.
NOTICE
When a fault is detected the fault code will automatically
be saved as a previous code in the ECM even after the
fault has been repaired.
A
B