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F.S.S. Theory of Operation
While the dryer is in an idle state, or 20-seconds after the heat turns off, the Phase 7 control monitors the
thermistor probe, located in the top of the basket (tumbler) chamber, and records the minimum temperature. If
the minimum recorded thermistor probe temperature is greater than 120° F (48° C) and the control detects a 50°
rise in temperature, this
will be the trip point and the F.S.S. routine will activate.
While a drying cycle is in process and the heat has turned on at least once, the Phase 7 control monitors the
exhaust temperature transducer. If the drying cycle temperature set point is set greater than 160° F (71° C) and
the control detects an exhaust temperature rise 25° F greater than set point, this will be the trip point and the
F.S.S. routine will activate. If set point is below 160° F (71° C), the trip point will be 185° F (85° C).
Once the F.S.S. routine is activated, the control will display “F.S.S. ACTIVATED” and water
will be injected into
the basket (tumbler) chamber. Any time water is being injected into the basket (tumbler), the basket (tumbler)
drive will turn the load for 1-second every 15-seconds. This process will continue for a minimum of 2 minutes.
After the 2 minutes have elapsed, the control will check if the temperature remained above trip point; if so, the
water will remain on. The control will continue to check if the temperature is above trip point every 30-seconds.
If the water has been on for a constant 10 minutes, the water
will be turned off, regardless of the temperature,
and the control will display “F.S.S. WAS ACTIVATED.” If the temperature has dropped below trip point, the
control will turn off the water prior to 10 minutes.
SYSTEM RESET
After the microprocessor determines that the situation is under control and shuts the water being injected into the
basket (tumbler) off, the microprocessor display will read “F.S.S. WAS ACTIVATED,” and the horn/tone will
sound until reset manually.
NON-COIN – To reset the microprocessor once the control displays “F.S.S. WAS ACTIVATED,” press the
red “STOP/CLEAR” key on the keyboard (touch pad).
COIN – To reset the microprocessor once the control displays “F.S.S. WAS ACTIVATED,” press and hold the
red “PAUSE” key for 3-seconds on the keyboard (touch pad).