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Under some conditions, the fuel or air supply can create a
diagnostic LED. The unit will continue to operate until the
The automatic ignition control has a built-in feature that pre-
vents damage to the compressor in short cycling situations.
In the event of intermittent power losses or intermittent ther-
mostat operation, the ignition control will delay output to the
compressor contactor for three minutes from the time power
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tactor output is being delayed.
Some electronic thermostats also have a built-in
compressor short cycle timer that may be longer than the
three minute delay given above. If you are using an elec-
tronic thermostat and the compressor has not started after
thermostat to complete its short cycle delay time.
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 op-
erating pressures. The loss of charge cutout switch protects
the refrigeration system from very low operating pressures
due to a loss of refrigerant. Compressor operation will be
disabled if either of these devices opens. If either devices
that a refrigeration system pressure switch is open.
Have the gas heating section of the unit checked at least
once a year before the heating season begins, to be sure
blocked by debris, which would prevent adequate combus-
tion air and a properly operating vent system.
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ing or cooling performance. Filter inspection should be made
at least every two months; more often if necessary because
of local conditions and usage.
last several years. However, should one become torn or un-
cleanable, it should be replaced.
important in installations with extended periods of direct
sunlight.
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ed annually and cleaned as frequently as necessary to keep
Bearings on the air circulating blower motor, condenser mo-
tor and the combustion fan motor are permanently lubricat-
ed. No additional oiling is required.
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fuel or combustion air supply, can be removed by carefully
After cleaning, the microamp signal should be stable
and in the range of 4 - 6 microamps DC.
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