MAIN CONTROL
The main control board is very robust and is rarely the
cause of system issues. It is important to fully diagnose
the board for any suspected failures before attempting
to remove the board for replacement or service. Follow
the guidelines below to fully test and diagnose the main
control.
Power Fault
If the unit does not (or seems to not) power on, follow the
flow chart below to help diagnose the issue. Before begin
ning it is important to first verify the unit is not simply set
to sabbath mode.
Check Voltage
At Wall Outlet
Voltage
Verify Voltage At
No Voltage
Main Control
No Voltage
Voltage Input
Voltage
Check Fuse Fl
For Continuity
Continuity
No Continuity
Alert Customer
Of Power Failure
Replace
Power Cord
Replace
Fuse
Inspect
Connect Test Display
Cycle Power And Check
For Operation
Operating -
Customer UI
Not Operating
Is the Plunger
__ Yes
Switch Operating
Properly?
No
Replace
Plunger Switch
Troubleshooting Extended
and Data Cable
Replace Main
Board
I
A
CAUTION
Precautions must be taken while working with
live electrical equipment. Be sure to follow
proper safety procedures while performing tests
on live systems.
REED SWITCH
A reed switch is used to monitor door state. When the door
is closed it comes into contact with the reed which closes a
circuit which turns the light and display off. When the door
is open the reed moves outward and opens the circuit. If
the door is left open for longer than 5 minutes the switch
will trigger an error code and set an audible warning.
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Summary of Contents for MPWC415
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