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TEST MODE
1. Press and hold the ON button for 5 seconds to enter Test Mode�
a. Verify all LCD segments blink every second�
b. Verify humidifier turns on�
2. After 5 minutes or after pressing the OFF button, the control will enter Off mode�
a. Verify the humidifier turns off�
HUMIDITY SETTING
• The control must be ON to adjust the humidity setting�
• The
(up) and
(down) buttons are used to increase or decrease the humidity setting�
• The first press of either button will display the current setting on the LCD display and SET will
be displayed below the % sign�
• Each subsequent push of the
or
• If a button is held down, the setting will continually change by 1% every 1/2 second for as long
as the button is pressed�
• The control will return to Normal Mode, displaying the measured humidity, 5 seconds after the
last button press/release�
OFFSET
An offset can be applied to the humidity reading to avoid discrepancies with other humidity
measuring devices in the home� Allow 48 hours for the control to acclimate before applying an
offset� The control must be ON to enter the Offset screen�
• Press and hold the OFF button for 5 seconds
to enter the Offset screen� See FIGURE 9�
• The
buttons can be used to set an
offset value between -5% RH and +5% RH�
• The control will return to Normal Mode,
displaying the measured humidity, 5
seconds after the last button press/release�
10
buttons will change the setting by 1%�
FIGURE 9 – OFFSET SCREEN
TURNING ON AND SETTING THE CONTROL
1. Press the ON button�
2. Use the
Increasing the humidity setting will increase humidifier run time, resulting in higher
humidity levels�
Decreasing the humidity setting will decrease humidifier run time, resulting in lower
humidity levels�
SEQUENCE OF OPERATION
Normal Mode
• When the measured humidity is lower than the setting, the control will activate the humidifier,
and ON will blink on the LCD display�
• When the measured humidity increases to 3% RH above the setting, the control will deactivate
the humidifier, and the LCD will display a solid ON�
Operating Limits
• If the control senses temperature below 40°F or above 99°F, the control will not allow the
humidifier to operate, and ON and
• The control will resume normal operation once the temperature is within the specified limits�
TROUBLESHOOTING
Technical Support is available Monday through Friday, 7:00 a�m� to 5:00 p�m� CST, at
(800) 334-6011� Use the guide on the following page to help find and correct system faults�
Contact Technical Support before replacing the control or for additional troubleshooting�
ERROR CODES
When the control detects an internal error, it
will stop controlling, deactivate the humidifier,
and the LCD will display the Error Code� See
FIGURE 10� The control will attempt to recover
from the error every 10 minutes� The Error
Code will continue to be displayed as long as
90-1638
the error condition exists� Button presses are
not registered when in Error Mode� Cycling
power to the control will not clear the code
and the control will need to be replaced�
buttons to set the control at 30%�
*
will blink on the display�
FIGURE 10 – ERROR CODE SCREEN
90-1645
11
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