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PRIMING CHEMICAL PUMPS
When a chemical becomes empty, the priming operation starts automatically the next time the machine
is turned on or a wash cycle is started. This feature is only supported on machines with the chemical
sense board installed and where CHEMICAL SENSING is enabled. Note that the initial prime time for
all pumps (Detergent, Rinse Agent and Sanitizer) is 60 seconds during which time the chemical icon
will flash. If the chemical is not sensed within 60 seconds, the chemical icon will remain lit and the control
will beep for about 5 seconds. After the chemical is sensed, the indicator in the display turns off; and
the pump continues to prime for 20 seconds to allow the chemicals to reach the machine. If all
chemicals are empty, the sanitizer will prime first followed by detergent. Only one chemical pump will
run at a time.
If chemicals are not sensed after three consecutive priming operations, the wrench is displayed along
with the empty chemical icon and priming is cancelled. The next time a wash cycle is started, the control
will flash the wrench and empty chemical icon as well as beep. This is to prevent the priming operation
in case the chemical sensors have malfunctioned. Verify that the chemical bottles are not empty. If they
are not empty, the chemical sensor or pumps have malfunctioned; contact your local Hobart Service
Office.
The priming operation can be reset by either:
• Pressing the WASH key a second time while the wrench and empty chemical icon is flashing.
• By turning the dishwasher off, then back on.
NOTE: If the use of chemical pumps is not desired, refer to the Operator Programming Mode section.