Amana APG M Series User Manual

22
Pressure Switch Stuck Open
A pressure switch stuck open can be caused by a faulty
pressure switch, faulty wiring, a disconnected or damaged
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blower.
If the control senses an open pressure switch during the
pre-purge cycle, the induced draft blower only will be ener-
gized. If the pressure switch opens after ignition has begun
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cycle begins, and the induced draft blower remains on. The
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Pressure Switch Stuck Closed
A stuck closed pressure switch can be caused by a faulty
pressure switch or faulty wiring. If the control encounters
a pressure switch stuck closed, the induced draft blower
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Open Thermal Protection Device
If the primary limit switch opens, the gas valve is immediate-
ly de-energized, the induced draft and air circulating blowers
are energized. The induced draft and air circulator blowers
remain energized until the limit switch recloses. The diag-
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A primary limit will open due to excessive supply air tem-
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total external duct static, blower motor, blower motor speed
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ly reset once the temperature falls below a preset level.
Primary Limit
A primary limit will open due to excessive supply air tem-
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total external duct static, blower motor, blower motor speed
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ly reset once the temperature falls below a preset level.
Auxiliary/Secondary Limit
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faulty limit, or a failed circulator blower can cause this limit
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a heating cycle may also cause the auxiliary limit to open.
The automatic reset secondary limit is located on top of the
circulator blower assembly.
Rollout Limit
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blocked or cracked heat exchanger, a failed induced draft
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device is a manual reset limit located on the burner brack-
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corrected before resetting the limit.
Flame Detected with Gas Valve Closed
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combustion and air circulator blowers are energized. The
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The control can be reset by removing the power supply to
the unit or it will automatically reset after one hour. Miswir-
ing is the probable cause for this fault.
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Under some conditions, the fuel or air supply can create a
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amber diagnostic LED. The unit will continue to operate
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The automatic ignition control has a built-in feature that
prevents damage to the compressor in short cycling situa-
tions. In the event of intermittent power losses or intermit-
tent thermostat operation, the ignition control will delay out-
put to the compressor contactor for three minutes from the
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cate the compressor contactor output is being delayed.
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High Pressure Switch/Low Pressure Switch
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Some models include a high pressure cutout switch and/
or a loss of charge cutout switch. The high pressure cutout
switch protects the refrigeration system from excessive
operating pressures. The loss of charge cutout switch pro-
tects the refrigeration system from very low operating pres-
sures due to a loss of refrigerant. Compressor operation
will be disabled if either of these devices opens. If either
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indicate that a refrigeration system pressure switch is open.

Amana APG M Series Specifications

General

Brand	Amana
Model	APG M Series
Category	Air Conditioner
Language	English