20
Electrical Service
Fuse Blocks - 120VAC Control Voltage
Two fuse blocks, located in the center of the front of the main control cabinet
protect the main control transformer. Each fuse block holds one fuse.
Always replace a blown fuse with a fuse of the same AMP rating.
DO NOT INCREASE THE FUSE RATING.
Motor Overloads
Motor overloads are located to the left of the fuse block inside the control cabinet. Each
motor has one overload to protect it from line voltage electrical overloads. In addition,
an auxiliary set of switch contacts is attaches to the overload. The switch contacts
disconnect 120VAC power to the motor contactor coils in the event of an overload
condition.
A motor Overload has 2 rocker switches, OFF/STOP and ON/START.
• The motor overload has tripped if the Off/Stop switch is in the Off position.
Set the rocker switch to STOP. Then, push the ON/START rocker switch
to the ON position
• The motor overload rocker switch
is in the START position when the
pump is ON and in the STOP position
when the motor is OFF.
• Turn the dishwaser power ON and
insert a dishrack to start the pumps
and conveyor. Troubleshoot the
motor circuit. The motor overload
may be faulty if motors are OK.
• Arrows indicate the Full load Amp
(FLA) adjustment screws. Each
screw should be set to the FLA
rating found on the motor the data
plate.
Pump/Conveyor Run Timer
The solid-state pump/conveyor run timer is a xed 90-second timer
that controls the maximum time that the pumps and conveyor drive
motor runs after a dishrack enters the load-end of the dishwasher.
90-seconds is the time necessary for 1 dishrack to complete its
travel through the dishwasher ensuring that wares are washed
and rinsed before exiting the machine.
The timer resets to 90-seconds each time a dishrack enters the
dishwasher. This ensures that every dishrack is processed
completely.
A faulty pump/conveyor run timer is possible if the 90-second run
time is off by plus or minus 2-seconds. The idle-pump start switch located on the load-
end dishwasher should be checked for proper operation before replacing the timer.
Electrical • Basic Service
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