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SYMPTOMS
Inside air is too dry.
Persistent condensation on
windows, walls, ceilings, etc.
Unit stops functioning.
Air from supply diffusers too cold. Imbalance of supply and exhaust air. Check filters and heat exchangers
Unit makes annoying noise.
Heat exchanger freezing up.
Low exhaust airflow in winter
season.
Venmar CES products are licensed to use
the following labels of approval:
Appendix H
Trouble Shooting
POSSIBLE CAUSES
Over ventilation - speed setting
too high.
Dehumidistat setting is too low.
Improper adjustment of
dehumidistat control.
Improper ventilation rate.
Window frame is too cold or leaky.
Electrical supply interrupted.
Outdoor temperature very cold.
Blower wheel out of alignment.
Imbalance of supply and exhaust air. Check filters and heat exchangers
Frost control damper not functioning. Check for operation of both
Heat exchanger flutes are positioned Remove flat plate heat exchanger
in the exhaust airstream.
SOLUTIONS
Adjust speed setting.
Set dehumidistat control in a
higher position (if applicable).
Adjust dehumidistat control knob
to a lower setting.
Install a dehumidistat (option).
Repair window frame.
Check the unit circuit breaker.
for blockage.
Check balance of airflows.
Install electric duct heater if necessary.
Remove the motor/blower assembly
and adjust blower wheel.
for blockage.
Check balance of airflows.
frost control damper actuators.
sections and re-position the flute side
of the heat exchanger into the supply
airstream.
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