◦
M651: Remove the control panel cover plate (horizontal cover located under the control panel
when it is in the down position). Locate the small round test button hole. Use a paper clip (or other
small-pointed object) to press the button and access the diagnostic mode.
Figure 2-18 M650 control-panel test button location
●
Repeatedly pressing the button will scroll through additional screens on the control-panel display.
Continue to press the button to scroll back to the diagnostic-mode main test screen.
Exit diagnostic mode
Do one of the following:
●
Touch the Cancel
button.
●
Wait 20 seconds. The control panel will return to the Home screen.
Table 2-9 Control panel diagnostic functions
Item Description Remarks
Cancel button
Exits a test
Keypad
Selects test settings in some of the test windows
130 Chapter 2 Solve problems ENWW
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