Wall Controller; Upper Temperature Sensor - BIG ASS FANS SmartSense Guia De Instalacion

CAUTION: Remove power from the SmartSense prior to disconnecting or connecting any portion of the
associated wiring when performing any of the procedures below.
During operation, the fan controller keypad display will typically show the command frequency from the SmartSense
wall controller. If the display reports the error code shown below accompanied by fan shutdown or slowdown, one
of the following conditions has occurred:
• The 4–20 mA loop circuit between the fan controller and the SmartSense wall controller has failed. Remove
system power and check for short circuits and/or open circuit conditions. See below for more information.
• The SmartSense wall controller power has been removed during normal operation. Check +24 VDC power
supply and associated connections.
• Component failure at the SmartSense or at the fan controller. See below for more information.
Powerfoil ® X 2.0, Powerfoil
Powerfoil X 3.0, or Powerfoil
®
Fan Keypad "Analog Error"
F
H
U
RUN STOP

Wall controller

To check the output circuit continuity, Remove the "4–20 mA output" wires at the SmartSense wall controller, and
then measure the same 250-ohm input impedance plus the resistance of the cable used for installation on the
output circuit wiring. Note: The analog current input on the fan controller has an input impedance of 250 ohms.
Measure this value at the analog input terminals of the fan controller (terminals ACM-ACI).
To check the output circuit current, remove power from the SmartSense wall controller. Place a multi-meter
(set to mA DC) in line with one of the mA output conductors. Reapply power. Set the SmartSense to Manual
Mode. The loop current should be between 4mA–20mA in accordance with the speed adjustment buttons on the
SmartSense keypad. Note: The SmartSense wall controller provides a 4–20 mA current to the fan controller for
speed reference.

Upper temperature sensor

To check the output circuit current, remove power from the SmartSense wall controller. Place a multi-meter (set to
mA DC) in line with one of the remote's conductors. Reapply power. The upper temperature sensor signal should
read between 4–20 mA DC. This reading can be converted to degrees Fahrenheit or Celsius using the following
formulas:
Degrees F = 18.7 x mA - 74
Degrees C = 10.4 x mA - 59
Note: Because the load impedance of the upper temperature sensor is in excess of 1 Mohm, the best way to test
the upper temperature sensor is to measure the mA signal from the sensor while the system is in operation.
26
TROUBLESHOOTING
® X 2.0 Plus,
X 3.0 Plus
®
FWD REV REM LOC
Example: 86° F = 18.7 x 8.55 mA - 74
Example: 26.8° C = 10.4 x 8.25 mA - 59
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Basic 6 ® , Powerfoil
Fan Keypad "4–20 mA Signal Loss" Error
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® 8, or Powerfoil ® 8Plus
AUTO FWD
RUN
REV
M
R F
STOP