Part 1 Troubleshooting Checklists
Troubleshootin
the Instrument
167
Checks with the Instrument Switched On, AC connected, without Battery
• AC Power LED is on (green).
• After pressing the On-Off/Standby switch, the following sequence occurs:
• The On/Off LED switches on immediately.
• The Alarm LED and the Suspend LED both switch on (red) and the Battery LED switches
on (yellow).
• After 1 second, the Alarm LED switches to yellow then, after 1 second more, all three
LEDs (Alarm, Suspend & Battery) switch off.
• As the LEDs switch off, the speaker test occurs with an audible tone.
• Shortly after the LEDs switch off, the display backlight switches on and the M3 logo dis-
plays.
Checks with the Instrument Switched On, AC connected, with Battery
The LEDs behave the same as described in the Checks with the Instrument Switched on, AC
Connected, without Battery (above) except that the Battery LED does the following:
• The Battery LED is initially on then switches first to yellow and then off for several sec-
onds.
• Finally, the Battery LED switches to its current status-color.
Checks with the Instrument Switched On, AC not Connected, with Battery
The LEDs behave the same as described in Checks with the Instrument Switched on, AC
Connected, without Battery (above) except that the AC Power LED is permanently off.
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