MQ Power DCA300SSJU4F3 Operation Manual page 73

DGC2020HD SERIES CONTROLLER
At times, it may be desired to power up the Engine Control
Module (ECM), key switch ON while the engine is not
running. This can be useful for diagnostic purposes and
fault clearing.
To enter the diagnostic mode with the controller in the
OFF mode and the engine not running do the following:
1. Press and hold the Alarm Slience and Lamp Test
buttons (Figure 106) at the same time for 10 seconds.
ALARM
SILENCE
BUTTON
SIMULTANEOUS
Figure 106. Alarm Silence/Lamp Test Buttons
2. Listen for an audiable click inside the control panel
which is the run relay that controls the key switch.
3. While in diagnostic mode the controller can see real
time engine CAN Bus data including Diagnostic
Trouble Codes (DTC).
4. To view active DTC codes navigate to Metering >J1939
ECU>DTC Active Data.
5. For previously active codes navigate to Metering>J1939
ECU>DTC Prev Data.
6. Real time ECM parameters are not supported due to
lack of sensors etc. and will display NS for No Signal.
DCA300SSJU4F2/F3 60 HZ GENERATOR• OPERATION MANUAL — REV. #2 (04/18/22) — PAGE 73
TROUBLESHOOTING (DIAGNOSTICS)
LAMP
TEST
BUTTON
PRESS
7. The dianostic mode will remain active until the Reset
button (Figure 107) is pressed or if the engine rpm
becomes greater than zero.
Reset
Figure 107. Reset Button