Friedrich Kuhl+ KEQ08A11A User Manual

62 PB
TROUBLESHOOTING
COMPLAINT CAUSE SOLUTION
Fan motor does not run.
Inoperative system button
Testbutton&replaceuserinterfaceifinopera-
tive
Broken,looseorincorrectwiring Refertoapplicablewiringdiagram
Opencapacitor Testcapacitor&replaceifinoperative
Fanspeedbuttondefective Replaceuserinterfaceifinoperative
Inoperative fan motor
Testfanmotor&replaceifinoperative(besure
internal overload has had time to reset)
Does not cool or only cools slightly
Undersized unit Refertoindustrystandardsizingchart
Indoor ambient thermistor open or
shorted
Seediagnosticcodesandreplacethermistorif
needed.
Dirtylter CleanasrecommendedinOwner’sManual
Dirtyorrestrictedcondenserorevapo-
ratorcoil
Usepressurewashorbiodegradablecleaning
agenttoclean
Pooraircirculation Adjustdischargelouvers.Usehighfanspeed
Fresh air or exhaust air door open
Closedoors.Instructcustomeronuseofthis
feature
Lowcapacity-undercharge Checkforleak&makerepair
Compressor not pumping properly
Checkamperagedrawagainstnameplate.Ifnot
conclusive,makepressuretest
Unit does not run
Fuseblownorcircuittripped
Replacefuse,resetbreaker.Ifrepeats,check
fuseorbreakersize.Checkforshortsinunit
wiring&components
Looseordisconnectedwiringcontrol
boardorothercomponents
Checkwiring&connections.Reconnectper
wiring diagram
Evaporator coil freezes up
Dirtylter Cleanlter(seeRoutineMaintenance)
Restrictedairow
Checkfordirtyorobstructedcoil.Cleancoil
(refertoroutineMaintenance)
Inoperative thermistor
CheckDiagnosticCodes.CheckThermstorsand
replaceasnecessary.
Short of refrigerant De-icecoil&checkforleak
Inoperative fan motor Testfanmotor&replaceifinoperative
Partiallyrestrictedcapillarytube De-icecoil.Replacecapillarytube
Compressor runs continually & does
not cycle off
Excessiveheatload
Unitundersized.Testcoolingperformance&
replacewithlargerunitifneeded.Seesizing
chart.
Restrictioninline
Checkforpartiallyicedcoil&checktempera-
turesplitacrosscoil
Thermistor shorted Replacethermistororelectroniccontrolboard
Tips continued

Friedrich Kuhl+ KEQ08A11A Specifications

General

Brand	Friedrich
Model	Kuhl+ KEQ08A11A
Category	Air Conditioner
Language	English