Berner AE08 - Troubleshooting Common Issues

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• Airstreamtooweak 
• Airstreamhitsobstruction
• Negativepressure
• Shaftrotatinginsidefan
• Onemotornotoperating
• Nozzlenotangledoutfarenough
• Unittoopowerful
• Airmovementtoocold
• Pushingairoutsidebuilding
SEEAIRISNOTHITTINGFLOORSYMPTOMS
• Switchturnedto“ON”position
• Thermostatnotsetproperly
• Coilsburnedoutduetolackofair
• Automaticresetthermalcutoutfailedinopen
position
• Manualresetthermalcutouttripped
 (ifsupplied)
• 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door)
• Relievenegativepressurebyprovidingmakeup
air
• Tightensetscrews
• Repairorreplacemotor
• Adjustnozzleangletooutside
• Adjustmotorspeed
• Addauxiliaryheattoovercomewindchillfactor
• Adjustdischargeanglebackintobuilding,adjust
motorspeed
• Replaceswitchorcheckwiring
• Changethermostatsetting
• Correctairflowproblem;replacecoils
• Replaceautomaticthermalcutout
• Resetmanualthermalcutout
AIR IS NOT HITTING
FLOOR
UNEVEN AIR
EXCESSIVE AIR
MOVEMENT AT
DOORWAY
ELECTRICALLY HEATED MODELS
NO HEAT
MINIMAL HEAT
EXCESSIVE HEAT
HOT WATER HEATED UNITS
EXCESSIVE HEAT
MINIMAL HEAT
NO AIR
• Powersupplylineopen(nopower)
• Fuseblown/circuitbreakertripped
• Motoroverloadtripped
• Failedswitch
• Checkpowersource,checkservicedisconnect,
checkmethodofcontrolinONposition
• Replacefuse(s)/resetbreaker
• Internallyprotectedmotor-shouldreset
 automaticallyaftercool-down,ifnot,replacemotor.
• Replaceswitch
MOTOR RUNNING/FANS ARE NOT ROTATING
MINIMUM AIR
ELECTRICAL CONTROLS NOT FUNCTIONING WHEN DOOR IS OPEN
SYMPTOMS
REMEDY
CAUSE
• Brokenordamagedflexiblehub
• Shaftrotatinginsidefan
• Selectorswitchisinoffposition
• Doorlimitswitchnotoperating
• Airdirectionaldischargevanesmis-adjusted
• Inadequateintakeclearance
• Blowermotoroperatesbelowspeed
• Fanrubbingagainsthousing
• Fanwheelscloggedwithdirt
• Faninbackwards
• Replacefansleeve/reengagecoupling
• Tightensetscrews/tightenfanonshaft
• Turnswitchto“ON”position
• Repairorreplacelimitswitch
• Adjustvanestoproperposition,seeinstructions
• Moveaircurtainorremoveobstruction
 Provideadequatespaceforaircurtain
• Impropervoltage
• Freefanfromhousing
• Cleanandvacuumfanwheels
• Checkfansforbladecurvetowarddischarge
• Thermostatinwronglocation-thermostat
 tooclosetodischarge
• Impropervoltage
• Thermostatnotsetproperly
• Lowenteringairtemperature
• Incorrectspeedrange
• Thermostatinwronglocation
• Thermostatnotsetproperly
• Insufficientairovercoil
• Impropervoltage
• Movethermostatawayfromairstream
• Supplypropervoltage
• Changetemperaturesetting
• Basedonunittemperaturerise,reducespeed
•
CheckFactoryMenuspeedrangematchesdiagram
• Movethethermostatclosertoairstream
• Changetemperaturesetting
• Removerestrictiononintake
• Supplypropervoltage
• Reducehotwaterflow
• Cleanintakeandcoils
• Increasewaterflow
• Increasewaterflow
X. TROUBLESHOOTING
• Toohighhotwaterpressure
•
Inadequateairflow,finspluggedup,dirtycoils
• Watertemperaturetoolow
• Intakeairbelowdesigntemperature