Phason Supra Touch Series, Manual

Page: 76 / 98

Phason 76 / 98 34740001
Problem Possible causes Possible solutions
The minimum idle speed is too high.
Decrease the minimum idle speed setting. For more
information, read
Programming variable cooling
stages on page 47.
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 cooling stages on page 47.
Incorrect motor curve
Configure the stage to use the other motor curve.
For more information, read
Configuring variable
stages on page 30.
Variable fan not running Incorrect wiring Correct the wiring. For more information, read
Connecting variable heating or cooling
equipment
on page 17.
The fuse is open or blown. Check why the fuse was blown and then 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 30.
The idle speed setting is too low. Increase the idle speed setting. For more
information, read
Programming variable cooling
stages on page 47. See also Programming
minimum ventilation curves on page 39.
The off at temperature setting is too
high. Decrease the off at temperature setting. For more
information, read
Programming variable cooling
stages on page 47.
The temperature set point is above
room temperature. Adjust the temperature set point to the desired
temperature. For more information, read
Programming variable cooling stages on page 47.
There is no power to the fan. Switch on the power.
Faulty fan/heater Replace the equipment.
Circuit breaker open Reset the breaker.
Variable speed 1 or variable speed 2
fan switches on, runs at full speed,
and then turns off. 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. For more
information, read
Configuring hysteresis on page
25.
Variable speed fan responds to only a
small portion of the 0 to 100% range Incorrect motor curve Configure the stage to use the other motor curve.
For more information, read
Configuring variable
stages on page 30.
Curtain opens when it should close
or closes when it should open Incorrect wiring, the close and open
wires are reversed. Correct the wiring. For more information, read
Connecting curtain machines on page 15