Viking FDW103 Service Manual page 43

General Operation of Dishwasher
(3 way diverter valve with water softener)
• A standard dishwasher cycle begins with the draining (1) step. Then, the electronic control
system opens the water inlet valve (2)
• The water fills with counter (3) and Air break (4)
• The water flows through air break and flowmeter, then on to the , "Water Softener" (5)
• Water flows through the Water Softening resin section unit (5), and into the sump by
connecting hose (6).
• After the water intake period , the circulation motor (9), pumps the water from sump (7) to
top (12), upper (11) and lower spray arms (10). If the machines has a diverter valve (13), the
water is carried out to top, upper and lower spray arms separately. The diverter valve rotates
a shutter that turns in order to send water to these spray arms. The upper and lower spraying
timing vary depending on the program step.
• Depending on the washing step, if hot water is necessary, the heater (8) is turned on, placed
between circulation motor and sump, to heat up the water to required temperature. The
working time of heater is adjusted by NTC placed in the sump.
• After a certain period of washing, the circulation motor is stopped. The water is drained
from the machine. At least one step during a wash cycle is run with detergent and hot water.
During the last rinsing cycle, the rinse aid is used with hot water.