Berner CHD10 Series User Manual

10
NO AIR • Electrical Power supply line open (no power) • Check power source, check method of control in
ON position
• Fuse blown/circuit breaker tripped • Replace fuse(s)/reset breaker
• Motor overload tripped • Internally protected motor - should reset
automatically after cool-down, if not replace motor.
• Failed switch • Replace switch
MOTOR RUNNING/FANS ARE NOT ROTATING
• Broken or fan hub • Replace fan
• Shaft rotating inside fan • Tighten set screws/tighten fan on shaft
• Broken/Loose coupling • Replace/Tighten coupling
ELECTRICAL CONTROLS NOT FUNCTIONING WHEN DOOR IS OPEN
• Selector switch is in o position • Turn switch to “ON” position
• Door limit switch not operating • Repair or replace limit switch
MINIMUM • Air directional discharge vanes misadjusted • Adjust vanes to proper position, see instructions
• Inadequate intake clearance • Move air curtain or remove obstruction
Provide adequate space for air curtain
• Blower motor operates below speed • Improve voltage
• Fan rubbing against housing • Free fan from housing
• Fan wheels clogged with dirt • Clean and vacuum fan wheels
• Air stream too weak • Adjust nozzle to proper position, adjust motor speed;
see installation instructions
• Air stream hits obstruction • Remove obstruction or reposition air curtain
(move out
3
/8” for every 1” up from the door)
• Negative pressure • Relieve negative pressure by providing make-up air
• Shaft rotating inside fan • Tighten set screws/Replace fan
• One motor not operating • Repair or replace motor/Check electrical connections
• Nozzle not angled out far enough • Adjust nozzle angle to outside
• Air movement too cold • Add auxiliary heat to overcome wind chill
• Pushing air outside building • Adjust discharge angle back into building
SEE AIR IS NOT HITTING FLOOR SYMPTOMS
X. TROUBLESHOOTING
SYMPTOMS CAUSE REMEDY
UNEVEN AIR
ELECTRICALLY HEATED MODELS
NO HEAT • Switch turned to “OFF” position • Turn switch on
• Thermostat not set properly • Change thermostat setting
• Coils burned out due to lack of air • Correct airow problem; replace coils
• Automatic reset thermal cutout failed in open position • Replace automatic thermal cutout
• Manual reset thermal cutout tripped • Reset manual thermal cutout
• Defective switch • Replace switch
NOT ENOUGH • Thermostat in wrong location - thermostat too • Move thermostat away from air stream
HEAT close to discharge
• Improper voltage • Supply proper voltage
• Thermostat not set properly • Change temperature setting
TOO MUCH • Thermostat in wrong location • Move thermostat closer to air stream
HEAT • Thermostat not set properly • Change temperature setting
• Insucient air over coil • Remove restriction on intake
• Improper voltage • Supply proper voltage
AIR IS NOT
HITTING
FLOOR
EXCESSIVE AIR
MOVEMENT AT
DOORWAY

Berner CHD10 Series Specifications

General

Brand	Berner
Model	CHD10 Series
Category	Heater
Language	English