Virginia Controls, LLC MH-3000 User Manual, 1_03C10-VC Page 39
5.5.1.5 S2 Slide Switch
The S2 Slide Switch is used to set various
operating modes or features in the CPU. It is
located on the lower right of the CPU board, just
above the program chip.
Currently only the first and third switch are
used. If the other switches are assigned a
particular function, this will be indicated on the
paperwork for the particular job.
5.5.1.5.1 Switch 1 on S2 Slide Switch
If switch 1 is ON, then the LCD Display will show the “Car Status” screen on power up.
If switch 1 is OFF, then the LCD Display will be blank on power up. To activate the
display and show the “Car Status” screen, press any key. This mode should be used if the
LCD is to be removed for any reason. It is recommended that if the LCD Display is removed
that you also remove the keypad, since pressing a key with the LCD removed could lock up
the CPU as it attempts to write to the LCD Display.
5.5.1.5.2 Switch 3 on S2 Slide Switch
Switch 3 on the CPU Slide Switch S2 is a Redundancy Defeat. If this is turned ON, then
this will prevent a fault from the Redundancy checks, or a Door Zone Fault. This can be
used during initial installation to allow the car to be run without generating these faults. As
a reminder to turn the defeat off after installation, the Fire Buzzer will be enabled.
If switch 3 on the CPU Slide Switch is OFF, then the Redundancy Faults will function as
normal.
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