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Symptom Possible Cause Corrective Action
Frame is ‘racked’ causing blades to Adjust frame such that it is square
bind on jamb seals and plumb
Actuator linkage loose Close damper, disconnect power, adjust
and tighten linkage
Defective motor Replace
Screws in damper linkage Locate screws and remove
Actuator linkage hitting wall or floor Damper installed too far into wall. Move
out to line designated on damper label.
Contaminants on damper Clean with a non-oil-based solvent
(see Damper Maintenance)
Heat
No power supplied to the actuator
Push reset button located on backside
of RRL or TOR.
Damper Trouble Shooting
The following is a possible cause and correction list for common concerns with the dampers.
Damper Maintenance
Dampers do not typically require maintenance as long as they are kept dry and clean. If cleaning is necessary,
use mild detergents or solvents. If lubrication is desired for components such as axle bearings, jackshaft
bearings and jamb seals, do not use oil-based lubricants or any other lubricants that attract contaminants such
as dust.
Dampers and their actuator(s) must be maintained, cycled, and tested in accordance with:
• The latest editions of NFPA 80, 90A, 92A, UL864, and local codes.
• Actuator manufacturer recommendations.
Damper does not
fully open and/or
fully close
Damper does not
operate
RRL or TOR sensor
tripped
Copyright © 2007 Greenheck Fan Corporation
IMO-XXX series IOM Rev. 3 July 2007