Power subsystem
Power-on checks
Turn on the power. If the control panel does not illuminate, perform the power-on checks to find the cause of
the problem.
1. Verify that the product is plugged into an active electrical outlet that delivers the correct voltage.
2. Verify that the power switch is in the on position.
3. Make sure that the product makes the expected start up sounds.
NOTE: The over-current/over-voltage protection circuit in the low-voltage power supply unit might be
functioning. Turn the product off, unplug the power cord, and turn the product on. If the product does
not function, the fuse melts, or the power supply is malfunctioning, replace the engine controller unit.
Control-panel checks
Use the product control panel to conduct tests on the control panel LEDs, display, or buttons.
NOTE: When the menus are accessed, some of the touchscreen buttons located along the sides of the
control-panel display are not illuminated. Use the figure below to locate the Cancel button and the left
arrow button to access the control-panel tests.
Figure 2-1 Control-panel 2ndary Service test access buttons
1.
From the Home screen on the product control panel, touch the Setup button.
2. From the Setup Menu screen, simultaneously touch the non-illuminated left arrow button and the
Cancel . This will activate the 2ndary Service Menu.
3. After touching both buttons, the Home screen appears. Touch the Setup Menu icon to access the 2ndary
Service Menu bar.
4. From the Service Menu, touch the 2ndary Service menu bar.
ENWW Troubleshooting process 45
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