6.2 Operation Sequence and Timing Charts (Cont.)
6.2.3 Operation Sequence (Model UL-100)
Refer to the operation sequence below and the timing chart on the next page.
Upon application of
Input power
- all outputs are initially de-energized and the display is disabled. Momen-
tary closure of the
Power Pushbutton
enables the solid state controls, program jumpers are read and the
auto-fill sequence is initiated.
The
Fill/Rinse Valve
activates for a user defined 2 to 40 seconds.
Extending the fill time past 30 seconds lengthens the total cycle time.
Model UL-100 does not have a wash tank heater.
If the
Cycle Start Pushbutton
is pressed during the fill, the
Cycle LED
illuminates.
The
Wash Cycle
starts after the fill is complete.
Pressing the
Cycle Start Pushbutton
activates the
Cycle LED
and initiates the Wash Cycle. The
Wash Pump Motor
is activated for 80 seconds and the
Detergent Pump
is activated for 1 to a
maximum of 30 seconds. The detergent pump is locked out if the fill time has elapsed.
The
Drain Valve and Drain Pump
are then activated for 30 seconds.
The
Fill/Rinse Valve
is activated for 2 to 40 seconds. At 6 seconds before completion of the Fill , the
Wash Pump
is activated for 3 seconds to remove air from the pump.
The
Rinse Aid Pump
runs for 1 to 30 seconds during the last seconds that the fill valve is open.
The
Sanitizer Pump
runs for 1 to 30 seconds during the last seconds that the fill valve is open.
The
Wash Pump
recirculates the final rinse water for a fixed time of 15 seconds. The Wash Pump stops
and the final rinse water is retained for the next wash cycle.
The
Cycle LED
is deactivated.
If the
Cycle Start Pushbutton
is not activated for (4) hours, the machine automatically enters the
Auto-shutdown Cycle and turns off.
If the
Door Safety Switch
is opened, all
Pumps and Valves
are disabled and times are held. Closing the
door re-enables Pumps and Valves and resumes timing from the point door was opened.
If the
Power Pushbutton
is closed while the machine is running, the
Auto-shutdown Cycle
is initiated.
The
Touchpad/Display
flashes 888’s. The
Drain Valve and Drain Pump
are activated for 20 seconds.
The
Fill/Rinse Valve
is activated for a user-defined time. Six seconds before the
Fill/Rinse Valve
closes,
the
Wash Pump
is activated for 3 seconds to remove air from the pump. The
Fill/Rinse Valve
closes, and
the
Wash Pump
runs for 10 seconds. The
Drain Valve and Drain Pump
are then reactivated for 30
seconds. The machine turns off.
Closure of the
Extended Wash Pushbutton
during the Wash Cycle activates the
Extended Wash LED
and
holds the cycle in a continuous wash mode until the
Extended Wash Pushbutton
is re-closed,
de-activating the
Extended Wash LED
.
The
Chemical Pump Prime Switches
are enabled any time the Temperature Display is active.
Part 6:
SERVICE TROUBLESHOOTING
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