Troubleshooting (Diagnostics) - MQ Power DCA300SSJU4F3 Operation Manual

845 ECU SERIES CONTROLLER
The engine controller of this generator diagnoses problems
that arise from the engine control system and the engine
itself.
1. With the engine stopped (OFF). Push and hold the
Hour Check Button (Figure 103) located on the control
panel.
HOUR CHECK
BUTTON
Figure 103. Hour Check Button
2. While keeping the Hour Check Button pressed, place
the Auto Off/Reset Manual Switch (Figure 104) in the
MANUAL position.
Figure 104. Auto-Off/Reset Switch
(Manual Position)
3. The Hour Check Menu Screen will be displayed on
the ECU controller.
PAGE 72 — DCA300SSJU4F2/F3 60 HZ GENERATOR • OPERATION MANUAL — REV. #2 (04/18/22)

TROUBLESHOOTING (DIAGNOSTICS)

4. Releasing the Hour Check Button and pushing the
Program/Exit Button on the ECU controller will return
the controller to the main screen.
5. Push the Program/Exit Button on the ECU controller
and select the Fault Diagnostics mode. This mode
enables the ability to carry out the fault diagnostics
as listed below:
„ DM1 Active Faults — Displays active fault messages
and codes.
„ DM2 Messages and Codes — Displays messages and
codes which previously occurred that are recorded in the
Engine Control Module (ECM).
„ Last Shutdown — Displays the messages and codes
that caused the most recent shutdown.
6. After perfoming diagnostic tests, place the Auto Off/
Reset Manual Switch in the OFF position
PROGRAM EXIT
BUTTON
Figure 105. Program Exit Button