Appendixes Phason
80 2009-06-15
Incorrect wiring Correct the wiring. For more
information, read
Connecting
variable-stage cooling elements
on page 19.
The minimum idle speed is too
high.
Decrease the minimum idle speed
setting. For more information, read
Programming variable stages on
page 46.
Variable fan runs at
maximum
The on full at setting is the same
as the temperature set point.
Adjust the temperature set point to
the desired temperature. For more
information, read
Programming
variable stages
on page 46.
Incorrect wiring Correct the wiring. For more
information, read
Connecting
variable-stage cooling elements
on page 19.
The fuse is open or blown. Check why the fuse was blown and
repair any problems. Replace the
fuse.
The variable stage is configured
as OFF
Configure the variable stage for
cooling. For more information, read
Configuring variable stages on
page 33.
The idle speed setting is too low. Increase the idle speed setting. For
more information, read
Programming variable stages on
page 46.
The off at temperature setting is
too high.
Decrease the off at temperature
setting. For more information, read
Programming variable stages on
page 46.
The temperature set point is
above room temperature.
Adjust the temperature set point to
the desired temperature. For more
information, read
Programming
variable stages
on page 46.
There is no power to the fan. Switch on the power.
Faulty fan/heater Replace the equipment.
Variable fan not running
Circuit breaker open
Reset the breaker.
Variable speed 1 or variable
speed 2 fan switches on,
runs at full speed, and then
turns off. Keeps cycling.
The hysteresis is not high
enough. The outside
temperature is rising and falling
quickly. This happens most
often in the spring and fall.
Adjust the hysteresis setting or
overlap the variable speed 1 or
variable speed 2 fan settings.
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