Thermostat Operation Manual

FX-Maxx Operations Manual
FAN MODES
Automatic Fan Speeds
FX-Maxx has 6 automatic fan speeds. Speed 6 is high, 3 is medium and 1 is low or the slowest speed,
Automatic fan mode allows the FX-Maxx to determine the required fan speed based on room temperature.
The closer the room temperature is to the set point, the slower the fan will run. This permits a balance be-
tween the most efficient temperature control and slower, quieter fan speeds. Automatic fan operation is
the factory default, however, manual fan speed control is available.
Manual Fan Mode
Six (6) is the fastest and 1 represents the slowest speed. Manual fan mode
allows the user to select and maintain the desired fan speed manually.
When a manual fan speed has been selected, the fan speed bar graph
will indicate the speed selected by the number of LED's lit.
Select speed 3, for example, and the first 3 LEDs in the fan bar graph will turn
on. Manual fan is sometimes preferred when room temperature is constantly changing due to varying heat
loads.
FAN SPEEDS
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1 2 3 4 5 6
FAIL SAFE AND FAULT HANDLING CODES
When a fault is detected FX-Maxx will display one of the following Mnemonic fault codes:
HPF indicates high Freon pressure. 15 Second Delay Ignored in Heat Mode.
LAC indicates low AC line power
AAA ... .indicates failed air sensor. Unit will not run until repaired.
Fail-Safe
There are four levels of fail-safe protection including the fail-safe off mode. Level one monitors
the sensors, takes appropriate action and allows continuous restarts after a 90 second delay...
Does not display the fault code. Level two worjis the same as level one, however, the appropri-
ate fault code mnemonic is displayed during the time-out between restarts. Level three is identi-
cal to level two with the inclusion of a three successive failures lockout routine. After four [4]
consecutive failures the system is shut down and a manual reset is required.
Lockout
Lockout occurs if four consecutive faults are detected within a heating or cooling cycle. Lockout
causes the system to shut down and flash the appropriate mnemonic fault code. Lockout can only
be cleared by turning the unit off, then.on with the power button.
Fauit Display
When a fault occurs the appropriate mnemonic code is flashed in the display. The flashing mne-
monic can be removed from the display by pressing and releasing the power button to reset the
control. Resetting the control does not solve the problem that caused the fault!
Revision: 03 01/02/98
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