Installation Manual

P.O. Box 1467 • Madison, WI 53701-1467
Phone: [phone] • Fax: [phone]
www.aprilairepartners.com
10009879 8.16
B2205708F
Printed in U.S.A.
© 2016 Aprilaire – A division of
Research Products Corporation
SYMPTOM
Humidifier or humidifier control “chatters” or clicks ON and OFF
rapidly.
TROUBLESHOOTING PROCEDURE
• Check for steady 22 VAC to 30 VAC across the “R” and “C”
terminals of the humidifier control with a voltmeter.
• Check, with a voltmeter, that the HVAC signal across the
“W” and “C” and “G” and “C” terminals of the humidifier
control is a steady 22 VAC to 30 VAC.
• Make sure that the ODT sensor wiring is not running
alongside other wires carrying high voltage (120 VAC or
higher) (Automatic Mode only).
SYMPTOM
Humidifier blower does not activate during Blower Activation Test.
TROUBLESHOOTING PROCEDURE
• Set the Blower Activation switch to “ON.”
• Check wiring diagrams for correct humidifier control
installation.
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