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For technical assistance and warranty information,
please call your local supplier.
Appendix I
Trouble Shooting
SYMPTOMS POSSIBLE CAUSES SOLUTIONS
Inside air is too dry Over ventilation - speed setting Adjust speed setting
too high
Dehumidistat setting is too low Set dehumidistat control in a
higher position (if applicable)
Persistent condensation on Improper adjustment of Adjust dehumidistat control knob
windows, walls, ceilings, etc. dehumidistat control to a lower setting
Improper ventilation rate Install a dehumidistat (option)
Window frame is too cold or leaky Repair window frame
Unit stops functioning Electrical supply interrupted Check the unit circuit breaker
Air from supply diffusers too cold Imbalance of supply and exhaust air Check filters and cores for blockage
Check balance of airflows
Outdoor temperature very cold Install electric duct heater
if necessary
Unit makes annoying noise Blower wheel out of alignment Remove the motor/blower
assembly and adjust blower wheel
Heat exchange core freezing up Imbalance of supply and exhaust air Check filters and cores for blockage
Check balance of airflows
Defrost damper not functioning Check for operation of both
defrost damper actuators