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SYMPTOMS
NO AIR
MINIMUM AIR
AIR IS NOT HITTING
FLOOR
UNEVEN AIR
EXCESSIVE AIR
MOVEMENT AT
OPENING
IX. TROUBLESHOOTING
CAUSE
•
Electrical Power supply line open (no
power)
•
Fuse blown/circuit breaker tripped
•
Motor overload tripped
•
Failed switch
MOTOR RUNNING/FANS ARE NOT ROTATING
•
Broken fan hub
•
Shaft rotating inside fan
•
Broken / Loose coupling
ELECTRICAL CONTROLS NOT FUNCTIONING WHEN WINDOW IS OPEN
•
Selector switch is in "OFF" position
•
Door limit switch not operating
•
Air directional discharge vanes misadjusted
•
Inadequate intake clearance
•
Blower motor operates below speed
•
Fan rubbing against housing
•
Fan wheels clogged with dirt
•
Air stream too weak
•
Air steam hits obstruction
•
Negative pressure
•
Shaft rotating inside fan
•
Nozzle not angled out far enough
•
Air movement too cold
•
Pushing air outside building
SEE: AIR IS NOT HITTING FLOOR
•
Check power source, check method of control
is in "ON" position
•
Replace fuse(s)/reset breaker
•
Internally protected motor - should reset auto-
matically after cool-down, if not, replace motor.
•
Replace switch
•
Replace fan
•
Tighten set screws/tighten fan on shaft
•
Replace / Tighten coupling
•
Turn switch to "ON" position
•
Repair or replace limit switch
•
Adjust vanes to proper position; see installation
instructions
•
Move air curtain or remove obstruction
Provide adequate space for air curtain
•
Improper voltage
•
Free fan from housing
•
Clean and vacuum fan wheels
•
Adjust nozzle to proper position, adjust motor
speed; see installation instructions
•
Remove obstruction or reposition air curtain
(move out 3/8" for every 1" up from the opening)
•
Relieve negative pressure by providing makeup
air
•
Tighten set screws/Replace fan
•
Adjust nozzle angle to outside
•
Add auxiliary heat to overcome wind chill
•
Adjust nozzle angle towards counter threshold
-7-
REMEDY
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