American Dryer Corp. Milnor Phase 7.2.2 User Manual
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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.
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.
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.
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.
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.
into a restart condition to reevaluate ALL the expected responses.