Jettech Metal Products F18-DP - Manual (Page 6)

Water Level System
The dishwasher water level is control by a pressure switch or
pressostat. A cup (grey plastic cylinder, #10528) located at the back of
the unit will keep an air pocket which will be pressurized as the water
level increases. The air pressure (approximately 2 inch water column)
activates a switch through a rubber tube that connects from the air trap
to the pressostat.
During the fill cycle, the water solenoid gets its signal from the
pressostat. When the pressostat is satisfied, it cuts the signal to the
solenoid valve and sends power to the thermostats and the timer
When trouble shooting this system, all components must be
considered.
Beginning with the pressostat which is adjustable.
Making sure the connection to the tube is air tight.
The tube may have an invisible crack which allows air to escape.
The air trap may be broken or the threads may have a crack also.
Adjustment (min-max)
Adjustment water level
Clock-wise for higher level
To water solenoid valve
(red wire)
from power switch
(grey wire)
To heaters and timer
(white wire)
6
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