Dry Air MAX Force Ventilation Manual - Page 4

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Trouble Shooting
Problem
Unit will not run.
Unit runs but fan
makes loud scraping
noise.
Unit runs but vibrates
excessively.
Unit runs but fan does
not turn.
Unit runs briefly, then
shuts off on overload.
Cause
1. No power to unit.
2. Switch not on.
3. Switch is faulty.
4. Faulty/broken cord or motor wire.
1. Unit has been severely jolted
causing fan to rub against housing.
2. Unit has been severely jolted
causing housing to deform.
1. Severe jolt has bent motor shaft
causing unit to be out of balance.
2. Fan blade damaged.
3. Dirt build up on one side of
fan blade.
1. Fan is jammed against housing.
2. Capacitor wire has broken/come
loose, capacitor has failed.
3. Housing has been damaged such
that it presses on fan blade.
1. Motor bearings are failing or
motor has developed an internal
electrical fault.
2. Intake grill and/or exhaust grill
is obstructed.
3. Excessive duct length.
Solution
1. Plug unit in. Check circuit
breaker.
2. Place in "ON" position.
3. Replace switch.
4. Perform continuity check, using
volt/amp meter. Repair/replace
faulty broken wire.
1. Remove motor and replace
damaged motor mounts.
2. Replace fan blade.
1. Remove and replace motor.
2. Replace blade if necessary.
3. Clean fan blade.
1. Remove motor and replace
damaged motor mounts. Replace
fan blade if necessary.
2.Repair/replace wires/capacitor
as necessary.
3. Replace housing/unit as
necessary.
1. Replace motor.
2. Remove obstruction.
3.Reduce duct length to
recommended maximum.
313 North Oak Street
Tel: 1-360-755-9176
Toll Free U.S. & Canada: 1-888-755-9176
Burlington, WA 98233 USA
Fax: 1-360-755-9236
• www.dryairtech.com