Troubleshooting; Warranty - Greenheck Vari-Green Control 475573 Installation, Operation And Maintenance Manual

Troubleshooting

Problem
Fan always at minimum speed
Fan always at high speed
Fan Cutout not working properly

Warranty

Greenheck warrants this equipment to be free from defects in material and workmanship for a period of
one year from the shipment date. Any units or parts which prove defective during the warranty period will
be replaced at our option when returned to our factory, transportation prepaid. Motors are warranted by
the motor manufacturer for a period of one year. Should motors furnished by Greenheck prove defective
during this period, they should be returned to the nearest authorized motor service station. Greenheck
will not be responsible for any removal or installation costs.
As a result of our commitment to continuous improvement, Greenheck reserves the right to change
specifications without notice.
Greenheck Vari-Green Motor catalog provides additional
®
information describing the equipment, fan performance,
available accessories, and specification data.
Phone: (715) 359-6171 • Fax: (715) 355-2399 • E-mail: gfcinfo@greenheck.com • Web site: www.greenheck.com
475573 • Indoor Air Quality - Temp/Humidity, Rev. 1, June 2012
8
Potential Solution
 Blow into the bottom of the unit. Your breath should increase the humidity
measurement and raise the temperature measurement. The fan speed should
increase within a few minutes.
Check that the temperature and humidity measurements are decreasing.

 Setpoint may be incorrect for the persistent load.
Setpoint may be incorrect for the persistent load.

 If the controller will not turn the fan off, verify that the measured temperature is at
least 0.9°F below and the relative humidity is at least 3% below set point.
 Verify that the cutout timer has started by looking for the flashing dot.
 If the controller will not restart the fan, verify that the measured temperature is at
least 1°F above the setpoint and the relative humidity is at least 5% above the
setpoint.
AMCA Publication 410-96, Safety Practices for Users and
Installers of Industrial and Commercial Fans, provides ad-
ditional safety information. This publication can be obtained
from AMCA International, Inc. at: www.amca.org.
Copyright 2012 © Greenheck Fan Corporation