American Dryer Corp. PHASE 7.2.2 NON-COIN - Manual (Page 83)

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EXHAUST HIGH-LIMIT FAULT – This routine monitors the basket (tumbler) safety over temperature
switch. If the switch opens, the dryer will display “Exhaust High-Limit Fault” and will go into Fault Mode with
a brief audio indication. If the basket (tumbler) temperature is above 100° F (38° C) the dryer will continue to
display “Exhaust High-Limit Fault”, while the Phase 7 non-coin microprocessor controller (computer) cools by
running with no heat for 3 minutes or until the temperature drops below 100° F (38° C). Once the basket
(tumbler) temperature is below 100° F (38° C), or the 3 minutes expire, the Phase 7 non-coin microprocessor
controller (computer) will shut off ALL outputs and will remain in Fault Mode until the dryer is addressed.
EXHAUST PROBE FAULT/AXIAL PROBE FAULT – This routine indicates a problem with the temperature
sensor circuit. This error will trigger an “Exhaust Probe Fault or Axial Probe Fault” condition and will go into a
Fault Mode with a brief audio indication. The dryer will run with no heat for 3 minutes. Once the 3 minutes
expire, the Phase 7 non-coin microprocessor controller (computer) will shut off ALL outputs and will remain in
Fault Mode until the dryer is addressed.
EXHAUST HIGH TEMP FAULT – This error routine indicates a problem with overheating. This error will
initiate an “Exhaust High Temp Fault” condition and will go into Fault Mode with a brief audio indication. The
Phase 7 non-coin microprocessor controller (computer) determines this error by monitoring the temperature
sensor input to have a steady gradual increase in temperature to a known upper limit (the limit typically is 20°
over the maximum allowed programmable set point). The dryer will run with no heat for 3 minutes or until the
temperature drops below 100° F (38° C). Once the basket (tumbler) temperature is below 100° F (38° C), or 3
minutes expire, the Phase 7 non-coin microprocessor controller (computer) will shut off ALL outputs and remain
in Fault Mode until the dryer is addressed.
LINT ACCESS OPEN – Indicates the lint drawer is open and needs to be closed.
LOW VOLTAGE FAULT – Indicates power has dropped below the operating values and will shutdown.
MAIN DOOR OPENED – Indicates the main door is open when it should be closed.
MODEL ERROR, ENTER CORRECT MODEL – This routine monitors the inputs, such as the sail switch
and gas valve. Steam dryers DO NOT use a sail switch or valve input, and an electric dryer will not use a gas
valve input. These signals allow the Phase 7 non-coin microprocessor controller (computer) to interpret what
type of dryer it is controlling. The Phase 7 non-coin microprocessor controller (computer) determines what the
expected dryer responses should be for that specific heat type dryer. Anytime a model fault is detected, the
Phase 7 non-coin microprocessor controller (computer) will interrupt the cycle and will display “MODEL ERROR,
ENTER CORRECT MODEL–” and go into Fault Mode with a brief audio indication. If the basket (tumbler)
temperature is above 100° F (38° C) at the time of the failure, the Phase 7 non-coin microprocessor controller
(computer) will continue to display “MODEL ERROR, ENTER CORRECT MODEL–” while the dryer cools
by running with no heat for 3 minutes or until the temperature drops below 100° F (38° C). Once the basket
(tumbler) temperature is below 100° F (38° C), or the 3 minutes expire, the Phase 7 non-coin microprocessor
controller (computer) will shut off ALL outputs and will remain in Fault Mode until the dryer is addressed.
NOTE: If a model error occurs, the Phase 7 non-coin microprocessor controller (computer) will
always default to the “gas” type for safety reasons. Also, the dryer will be stopped and forced
into a restart condition to reevaluate ALL the expected responses.