OCEM 3 Series User manual

Use and Maintenance Manual
ocem
EN
ef4a146a-b345-4f25-ae48-e0972338a5a9
LED
Precision
Approach
Path
Indicator
UT-MT-0972_1.0_19-09-2022 (EN)

Contact us
OCEM AT 1.1 [phone] 1.2 [email protected]
Editions
Revision Date Notes
1.0 19-09-2022 First edition
UT-MT-0972_1.0_19-09-2022 (EN) | | These specications may be subject to change.
© Copyright 2022 OCEM Aireld Technology (Italy) | All rights reserved.
OCEM Aireld Technology, and any other name/brand associated with products OCEM Aireld Technology mentioned or indicated in this document,
are trademarks or registered by OCEM Aireld Technology. The rights of third parties on each registered trade mark mentioned in this document
are the property of their respective owners.
The copyrights of this manual are the property of OCEM Aireld Technology. The instructions, drawings, tables and other contained in this manual
are of a reserved technical nature and cannot be reproduced and/or disclosed, whether in full or in part, without prior authorization of the
Manufacturer. The reproduction of this manual is allowed for the sole purpose of making one backup copy. OCEM Aireld Technologyreserves,
under the law, the property of this manual, by prohibiting the transfer to third parties and/or the unauthorised reproduction.

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1 GENERAL INFORMATION
1.1 Package content 5
1.2 Manual reference guide 6
1.3 Safety instructions 6
1.4 Safety symbols 8
1.5 Denitionofoperator 8
1.6 Limited warranty 9
1.7 CE marking 10
1.8 Condentiality,industrialpropertyrights 10
1.9 Disposal 10
1.10 Articleidentication 10
1.11 Photo-biologicalrisk 11
2 FIXTURE DESCRIPTION
2.1 Generalcharacteristics 13
2.2 Content of delivery 15
2.3 Article number 16
2.4 Lensheatingoptionaldevice 17
2.5 Tiltswitchoptionaldevice 17
2.6 Tiltswitchoptionaldevice(mercury-free) 17
2.7 Behaviourincaseoffault 17
2.8 Optionalmonitoringdevice 17
2.9 Wiring 18
3 INSTALLATION
3.1 Fixtureplacement 19
3.2 Permanent installation 20
4 ADJUSTMENTS AND MAINTENANCE
4.1 Scheduledmaintenance 25
4.2 Removalofthecover 26
4.3 Cleaningofthelens 27
4.4 ReplacementoftheLedMODULEassembly 28
4.5 ReplacementofthePCBALEDDriverBoard 30
4.6 ReplacementofthePCBACCRInterfaceBoard 33
4.7 ReplacementoftheLHAsupport 36
4.8 Troubleshooting 39
4.9 Blockdiagramofthesystem 41
4.10 Spareparts 42

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GENERAL INFORMATION
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TheLEDPAPI66ofOCEMAireldTechnologyisasignallingsystemcomposedofoverheadlightLEDunitsPAPI
Series3typecurrent-powered(6.6A-StyleB),withopticalindicatorfunctionofthegradientapproach(VASI|Visual
ApproachSlopeIndicator).Thesystemprovidestoightcrewsinformationsconcerningboththeadoptedapproach
angleandthetrajectorytofollow.Thedeviceisdesignedincompliancewith:
●ICAOAnnex14Volume1|EASACerticationSpecicationsandGuidanceMaterialforAerodromeDesign
(CS-ADR-DSN)
●FAAAC150/5345-28PrecisionApproachPathindicator(PAPI)Systems:L-880-Systemcomposedof4light
units;L-881-Systemcomposedof2lightunits(StyleB:systemcurrent-poweredthroughseriescircuit;
ClassI:systemoperatingfrom-31degreesFahrenheit(F)[-35°C]to131degreesFahrenheit(F)[+55°C]).
Immediately check for visible damages of the containers and of the containing parts. Carefully
remove the device and check for visible damages. Before proceeding read all warnings on
the packaging.
Store all the components in the original packaging until the time of installation.
Pay attention not to damage the cables, the pipes or the watertightness of the components.
The device described in this manual has been designed to be powered by series circuits,
powered by constant current regulators (CCR) up to 6,6 A.
1 GENERAL INFORMATION
1.1 Package content

GENERAL INFORMATION
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1.2 Manual reference guide
Thisdocumentcontainsalltheinformationrelatedtotheequipmentanddescribestheprocedurestofollowduring
theinstallationoftheproductandduringordinarymaintenance.Thedocumentisindentedforalloperatorsthat
mustinterveneontheequipment.
This document does not replace in any manner applicable laws, rules or regulations, included the
standards FAA and ICAO.
Theprecautionsprovidedinthemanualarealwaysprecededbyasymbolasillustratedbelow:
Indicates the warnings, the notes, the suggestions and other points on which is intended to
draw the attention of the reader.
Indicates the operations to be carried out mandatorily or the information which should be
carefully read to avoid possible risks.
Indicates particular risks connected with the power supply. It reports the operations to be
carried out mandatorily or the information which should be carefully read to avoid possible
risks.
Theseprecautionssafeguardthepersonalsecurityofeveryonewhoworkonand/orareinproximityoftheequipment
andoftherelativesupplycircuits.
The failure to comply with the instructions (in particular those preceded by danger, warning, caution
precautions) can cause serious injury or death.
1.3 Safety instructions
CAREFULLY READ THIS DOCUMENT.
The improper use of the equipment or the failure to comply all the precautions indicated
implies life danger and serious injury to persons and damages to things.
HAZARD OF ELECTRICAL SHOCK, EXPLOSION OR ELECTRIC ARC
Carefully read the enclosed documentation before installing or starting to use the equipment.
Do not install the equipment until the completion of all construction works required to carry
out the work.
DO NOT OPERATE ON POWERED CIRCUITS
Do not carry out any operation on powered circuits.
Beforeeveryaccess,inspectionorinterventionontheequipment,ensuretohaveswitchedo󰀨the
equipmentbyopeningthemainpowerswitchandbyremovingthesupplyfromtheunit(openthe
powerswitchatthebeginningofthelineorswitcho󰀨theconstantcurrentregulator).
The failure to comply all the precautions indicated implies life danger and serious injury to
persons.

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Alwaysproceedwiththeutmostattention.Safeinterventionproceduresindicatedaimtoprotecttheoperatoragainst
possiblerisksandtopreservethexturefromanydamages.
SAFE INTERVENTION ON THE FIXTURE POWERED BY SERIES CIRCUIT
Operate in this way:
●Switch o󰀨 the constant current regulator
●Disconnect the supply plug from the related socket of the secondary of the isolation
transformer
●Disconnect the plug of the monitoring circuit (if present) from the related socket of the
secondary of the dedicated isolation transformer
Carry out all the operations on the xture and complete the intervention. At the end, proceed
to restore the operating condition:
●Reconnect the supply plug to related socket of the secondary of the isolation transformer
●Reconnect the plug of the monitoring circuit (if present) to the related socket of the
secondary of the dedicated isolation transformer
●Restart the constant current regulator
RESIDUAL ENERGIES
Always wait for the discharging time (at least 5 min) before operating on the equipments.
Check the complete de-energization of the equipments before accessing the potentially active
parts. The failure to comply all the precautions indicated implies life danger and serious
injury to persons.
GROUND CONNECTION
The body/envelope of the xture must be connected to the earth potential before the
commissioning of the xture.
Check that the protective conductor yellow-green is connected to the terminal predisposed
on the xture.
In case of isolation transformer with secondary ground connected it is advisable to ground
connect the xture at the point where the secondary of the dedicated isolation transformer
is connected to the ground.
IN CASE OF MULFUNCTION OF THE EQUIPMENTS
Do not leave the devices who have expressed evidence of deterioration or of malfunction.
Disconnect the energy sources and proceed as soon as possible to repair/replacement of
devices.

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1.4 Safety symbols
Thesymbolsillustratedinthefollowingtableareusedintheuserandmaintenancemanualandonthedevice.
Thesesymbolsindicatetheexistenceofanydangeroussituations,toindicateobligationsandprohibitionsinrelation
tothesituationsthatmayrepresentanhazardfortheoperatororindicatethebehaviourtoadopttominimizethe
riskfortheoperator.
Warning signs Prohibition and obligation signs
W001|Generalwarningsign P001|Generalprohibitionsign
W004|Laserbeam M001|Generalmandatorysign
W005|Non-ionizingradiation M002 | Refer to instruction manual/
booklet
W006|Magneticeld M005|Connectanearthterminaltothe
ground
W012|Electricity M009|Wearprotectivegloves
W017|Hotsurface M015|Wearhighvisibilityclothing
W027|Opticalradiation M021 | Disconnect before carrying out
maintenanceorrepair
1.5 Denition of operator
Alloperationsondevicesandonitsinternalpartsmustbeperformedbyprofessionalsta󰀨,properlyformedand
awareoftherisksconnectedwiththepowersupplyandtotheuseoflowandhighvoltagecircuits.
Take all the precautions in compliance with the safety standards for the work carried out on
electrical installations and however for the works carried out using electrical installations or
in bu󰀨er zones of the installations and of the electrical devices.
Alloperationsonequipmentsandonitsinternalpartsmustbeperformedbyprofessionalsta󰀨,properlytrained
forCardioPulmonaryResuscitation(CPR)techniques.
Never operate on devices if there is not at least another operator properly trained for CPR
techniques.
CheckthatOperatorsdonotoperateoutsidetheirownspeciceldsofcompetenceandresponsibility.OCEM
AireldTechnologydeclinesanyandallliabilityarisingfromwrongoperationscarriedoutbyuntrainedpersonnel
intheuseofthedevices,orderivingfromthenoncomplianceofgeneralsafetystandards.

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1.6 Limited warranty
OCEMAireldTechnologyassuresthatalltheLEDPAPI66productsmarketedarefreeofmanufacturingdefects
atthetimeofshipment.Thislimitedwarrantywillbevalidfortheperiodindicatedinthesalesagreement.THIS
LIMITEDWARRANTYIMMEDIATELYDECAYSIFTHEPRODUCTISUSEDFORPURPOSESOTHERTHAN
ORIGINALLYINTENDED.
ThislimitedwarrantyisprovidedbyOCEMAireldTechnologytotheoriginalpurchaserofLEDPAPI66productsasidentied
bythedocumentsissuedatthetimeofpurchase.Thislimitedwarrantycanbetransferredtothesubsequentpurchasersofthe
Product,onlyonconditionthatthisProductisresoldasNEWandwiththeoriginalpackaging.
Each change and/or tampering made to the product immediately terminates the warranty. OCEM
Aireld Technology cannot be held responsible for any damage to items or persons deriving
from the failure to comply with instructions relating to installation, use and maintenance of
the product, and to the installation and storage environmental conditions stipulated by the
Manufacturer or by applicable rules regarding electrical devices and systems.
Incaseofpotentialdefectsornon-usabilityoftheGoodssupplied,theapplicablewarrantythatexcludesanyotherlegalwarranty
andagreement-appliestothedefectsofmaterials,inthedesign,and/orintheinstallationoftheGoodssupplied.Thewarranty
consists,dependingontheSupplier,intherepairorreplacement,attheexpenseoftheSupplier,ofeachfaultycomponentor
malfunctioningcomponentfromthebeginning,butisnotextendedtodamagesarisingfromnegligenceorwear.
Thiswarrantylastsforatleast12monthsafterthedateonwhichthereceivedGoodsareputintoservice,butwillnotinany
caseexceed24monthsfromtheshippingdate.
FAA
For FAA certied products this warranty lasts for at least 4 years after the date on which
the received Goods are put into service, but will not in any case exceed 5 years from the
shipping date.
TheSupplierundertakestorepairorreplacethecomponentsintheshortestpossibletimewithoutprejudicetothefactthatfor
thesocalledcommercialcomponentsandmoregenerallyforthecomponentssuppliedbythird-partymanufacturers,willonly
beappliedthetermsoftherespectiveoriginalmanufacturer'swarranties.
ThewarrantyabsolvesfromallliabilitytheSupplieranddoesnotapplytothedamageofanykind,causedby:improperuse
bytheCustomerorbytheCustomer’ssta󰀨,useofinadequatematerials,orincorrectorinsu󰀩cienttreatments;installation
ofequipmentsorsparepartsnotapprovedbytheSupplier;installationandoperatingworkingoftheGoodsreceivedwithout
followingtheindicationsandtheinstructionsprovidedbytheSupplier’sTechnicalsta󰀨;improperorexcessiveuse,insu󰀩cient
maintenance,and/orworksnotcarriedoutincompliancewiththeinformationprovidedintheuseandmaintenanceinstructions;
anyotherreasonnotattributabletotheSupplier.TheCustomermustshoulder,atitsowncostandemployingitsownsta󰀨,
withoutinvolvingtheSupplier,thoserepairsthatonthebaseoftheSupplier’sopinionareconsideredcompliantatamoderate
leveloftechnicalknow-how.
TheCustomermust,underpenaltyofexpiration,communicatethecomplaintconcerningthedefectorthenon-compliancetothe
Supplierwithin 8 days from the date of discovery of the defect,andmustsendawrittenrequesttoactivatetheintervention
underwarranty.Theinterventionrequestunderwarrantymustbesentto:
OCEM Aireld Technology | via della Solidarietà, 2/1 | 40056 Valsamoggia BO (Italia)
[email protected]
TheCustomermustbearthetravelandaccommodationcostsbornebythetechnicalsta󰀨oftheSupplierthatmust
completeontheinstallationsiteanyinterventionassociatedwiththeguarantee.
Thewarrantyexcludesanyotherdamage,includedthoseresultingfromeconomiclossandfromlowproduction
capacity;direct,indirectorconsequentialdamages;andtheContracttermination.
TheSupplierisnotinanymannerresponsibleforanyothercompensationorindemnity,includingdamagederived
frommissedorreducedproduction,fromthelossofchance,fromthemissedorreducedprot,fromthelossof
contracts,impossibilityofuseoringeneralthepartialuse,inadditiontoindirectand/orconsequentialdamages.

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1.7 CE marking
ThisequipmentcomplieswiththerequirementsofEuropeanlegislationfortheCEmarking.The
usershouldcarefullyreadthisdocumentandrespectalltherequirementsquoted.
ThisequipmentmeettherequirementsinrelationtohealthandsafetyofthemainECdirectives,andinparticular
oftheEMCDirectiveonelectromagneticcompatibility(2014/30/EU)andoftheLVDirectiverelatingtoelectrical
equipmentdesignedforusewithincertainvoltagelimits(2014/35/EU).
1.8 Condentiality, industrial property rights
TheCustomerneedstoadoptthemaximumcondentialitywithrespecttoalltheinformationoftechnicalnature
(including,bywayofexampleandnotexhaustively,plans,programmes,documentation,formulas,recipes,setting
andcorrespondence)receivedbytheSupplierorinanycaseassimilatedorgainedduringtheconclusionofthe
Contract of sale.
Anyrightregardingintellectualandindustrialpropertyconnectedtoequipmentandtoanyotherelementincluded
inthesuppliedGoodsasindicatedintheContractremainexclusivepropertyoftheSupplier.
1.9 Disposal
Attheendofuse,theusermustconferallthewasteinsuitabledi󰀨erentiatedwastecollectioncentres.
ItistheresponsibilityoftheuserthecorrectdisposaloftheequipmentinaccordancewiththeWEEE
Directiveandwiththerespectivenationallawsinforceatthetimeofdisposal.Theseequipments
mustneverbedisposedofinthehouseholdwaste.
1.10 Article identication
Oneachequipmentthereisanidenticationplateofthearticle,wherethearticlecodeisreported;ontheplate
thereareadditionaldata:thenameofthemodel,employmentsoruse,powersupplyfeatures,anytrademarks
and/ormarksthatattesttheagreementoftheequipmenttospecicregulationsorlegislations.

GENERAL INFORMATION
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1.11 Photo-biological risk
ThexturesLEDPAPI66aredesignedandmanufacturedincompliancewithcurrentregulations,butifusedunsafely
orwithoutprecautions,thelightemittedbythexture,reachingevenhighlevelsofintensity,canbeharmfulnot
onlytothosewhousethelightxturelocally,butforanyonewithinthelightbeamrange.
Theopticalradiationissuedbytheequipmentdoesnotpresentanyparticularphoto-biologicalrisks,howevercan
beharmful.
Don’t look directly inside the light source during high intensity operation. Wear appropriate
personal protective equipment (goggles or similar protections).

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Description
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Thextures,positionedontheleftofthelandingarea,projectstablelightbeamsanddependingontheapproach
angletherecanbedi󰀨erentcombinations:
PAPI Glideslope A-PAPI Glideslope
● ● ● ● Veryhighglideslope ● ● Highglideslope
● ● ● ● Slightlyhighglideslope
● ● ● ● Appropriate approach glideslope ● ● Appropriate approach glideslope
● ● ● ● Slightlylowglideslope ● ● Lowglideslope
● ● ● ● Verylowglideslope
2 FIXTURE DESCRIPTION
2.1 General characteristics
TheLEDPAPI66unitaredesignedforthepurposeofprovidingvisualguidancetoaircraftsinthebichromatic
approachashsignalling:
●Four-lightPAPIthesystemconsistsof4LHAunits(LightHeadAssembly)current-poweredinenvironments
withtemperaturesbetween-35°C[-31°F]and+55°C[+131°F].
●Two-light PAPI (A-PAPI) the system consists of 2 LHA units (Light HeadAssembly) current-powered in
environmentswithtemperaturesbetween-35°C[-31°F]and+55°C[+131°F].
Theinnovative optics reach the lowest consumption levels of the sector,uniformintensityandred/whiterapid
transitiontoprovidethepilotwithanaccuratereportingontheglideslopeapproachingtherunway.
TheLHAunitsusehighpowerLEDarraytogeneratethelightemissionoftherequiredcolour:redforthelower
sectionofthelightbeam,whitefortheuppersectionofthelightbeam.
The4or2lightsxtureformatdisplayedbythepilotisillustratedinthegurebelow.

Description
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Intensity level CCR ICAO
IntensityLevel5 6.6 A 100%
IntensityLevel4 5.2 A 24%
IntensityLevel3 4.1 A 6%
IntensityLevel2 3.4 A 0.8%
IntensityLevel1 2.8 A 0.16%
Intensity level CCR FAA
IntensityLevel3 6.6 A 100%
IntensityLevel2 5.5 A 34%
IntensityLevel1 4.8 A 15%
Availablewithsupportsforxedinstallation[P0]withfrangiblecoupling,theLEDPAPI66systemisdesignedto
be used in various scenarios.
TheLEDPAPI66iscompliantwiththerules:
ICAO(Annex14Volume1) EASA(CS-ADR-DSN)
FAA(AC150/5345-28)
The xtures LED PAPI 66 described in this manual have been designed to be installed on
the concrete basis.
Typical installation suggested by FAA: minimum depth of 914 mm [36”] or of 305 mm [12”]
below the frost line, if greater; the base must extend at least 305 mm [12”] in all the directions,
beyond the prole of the LHA unit.
The distance between the two front supports must be equal to 283 mm[11,13”].
The supply circuits for the LHA modules can be positioned within plastic or metallic pipes
permanently laid in the ground, equipped with appropriate coupling devices.
TheLHAunitisdesignedtobeinsertedinacircuitairportseriespoweredbyconstantcurrentregulators(CCR,
ConstantCurrentRegulator)at3or5currentstep,intherangefrom2.8to6.6Ae󰀨ective.Theintensityofthelight
emitteddependsonthee󰀨ectivevalue(RMS)ofthesupplycurrent.
Height A B
Minimum 394 mm
[15.52in]
566 mm
[22.27in]
Provided 601 mm
[23.67in]
773 mm
[30.42in]
Extended 912 mm
[35.92in]
1083 mm
[42.67in]

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2.2 Content of delivery
L-880
PAPI/4 LHA
4 LIGHTS
L-881
A-PAPI/2 LHA
2 LIGHTS
LHA-LightHeadAssembly
Pre-cabledunitwithcables(powerandcontrol)183cm[6ft]inlengthwith
overmolded connectors L-823
4 2
Flexiblewrinkledtube1”inlength15,24m[50ft] 15,24m[50ft] 15,24m[50ft]
ColumnLHA(withbreakablecoupling)12-3/4” 4 2
ColumnLHA(withbreakablecoupling)14” 8 4
Flange 2” 12 6
DigitalClinometerwithassemblyscrews 1 1
Thekitsincludealsoalltheconnectioncablesattestedandpre-cabled.
The isolation transformers necessary for the functioning of the unit are not included in the
supply. It is the customer’s responsibility to arrange appropriate certied equipment to
supply the units.
TheunitscommunicatewitheachotherbymeansofaCANtypecommunicationbus(CANBUS).
InthePAPIsystemisincludedadigitalclinometertoperformthealignmentandtheadjustmentoftheLHAunit.
Forfurtherinformationontheuseoftheclinometer,pleaserefertothemanualincludedinthesupply.
Calibrate the clinometer before each use.
Clinometer calibration can be easily performed by the maintenance personnel, carefully
following the instrument's instructions.

Description
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2.3 Article number
example: AV‑PAPI 4 - P0 - 66 - 0 - 1 ...
Regulations/Dimension
A
2
4
LHA
=
=
=
=
ICAOAbbreviated-PAPI2-LHA(LightHeadAssembly)
FAA2-LHA(LightHeadAssembly)
FAA/ICAO4-LHA(LightHeadAssembly)
Replacementopticalunit(onlyLHA-LightHeadAssembly)
Installation
P0 = Fixed
Supply
66 = CCR3and5stepfrom2.8Ato6.6A(FAA Style B)
Options
0 = None
4 = Heatedlens*
8 = Tiltswitch
12 = Heatedlensandtiltswitch(version FAA std)**
Colour
0
1
2
3
4
5
6
7
=
=
=
=
=
=
=
=
Orange FAA
YellowICAO
Marine grade orange
Marine grade yellow
Desert sand
NATOgreen
Marine grade desert sand
MarinegradeNATOgreen
Special version***
SM00 = Monitoring
S0MF =Tiltswitchmercuryfree****
SMMF = SM00 and S0FM
* The “Heated lens” option is mandatory for the systems installed in subzero and arctic conditions.
** The“Heatedlensandtiltswitch”ismandatoryfortheFAAcertiedsystems.
*** Forthespecialversionscontactthetechnicalocebeforeordering.
****Specialversionforapplicationinareasinwhichmercuryislistedamongthesubstancessubjecttorestrictions(ex.EuropeanCommunity).

Description
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2.4 Lens heating optional device
TheLHAunitofLEDPAPI66systemcanbeequippedwithoptionallensheaters.Theheateriscontrolledbya
microprocessorsystemtodeleteanyproblemcausedbyrepeatedandcloseon-o󰀨cyclesandtooptimisethe
relativeconsumption.
Theheaterisalwaysactivatedatfullpowerfor25minutesaftertheunitispoweredon.Subsequentlyitremains
poweredatlowpowertokeepthelenswarmatabout5°aboveambienttemperature.
Inanycase,ifthelenstemperatureexceedsacertainthreshold,theheaterisdeactivated.
2.5 Tilt switch optional device
Thee󰀨ectivenessoftheLEDPAPI66systemisdeterminedbythecorrectinclinationofthelightbeamsofthe
LHAunitsinstalled.IfaLHAunitlosesthealignmentofthecorrectinclination,canprovideincorrectindicationsto
thepilotapproaching.
EachLHAunitcanbeequippedwithatiltswitchoptionaldeviceoftheLHAunitand,ifthisdeviatesbythecorrect
inclinationsetduringinstallation,thewholeLHAunitssystemisdeactivated(withadelayof10-30seconds,to
avoiddetectionmistakesduetotemporaryexternalconditions,suchaswindorvibrations).
ThePAPIsystemisdesignedtooperateinfail-safemode:whentheLHAunitsareequippedwithtiltswitchdevice,
thesystembecomesoperationalonlyifallLHAunitsarecorrectlyinclined.
2.6 Tilt switch optional device (mercury-free)
TheLEDPAPI66systemcanbeequippedwithtiltswitchoptionaldevicemercury-freetype(forapplicationsin
areasinwhichmercuryislistedamongthesubstancessubjecttorestrictions).Theoperationofthesecomponents
issimilartotheonealreadydescribedintheparagraphrelatedtothestandardtilt.
2.7 Behaviour in case of fault
Belowarelistedthepossibletypesoffaultsandthebehaviourofthefailedunitandofotherunitsofthesystem
inthevariouscases:
●Tilterror:thetiltswitchdevicedetectsthemisalignmentoftheLHAunitwithrespecttotheinclinationset
duringinstallation.AlltheLHAunitsinserviceofthePAPIsystemswitcho󰀨afterabout10-30seconds.
●LEDmodulefault.AlltheLHAunitsinserviceofthePAPIsystemswitcho󰀨afterafewseconds.
●Faultoftheunitsupplysystem:aninternalfaultoccursorthepowersupplyisdisconnected.TheLHAfailed
unitswitcheso󰀨immediately(ordoesnotswitchon)andtheremainingLHAunitsinserviceofthePAPI
systemswitcho󰀨afterafewseconds.
2.8 Optional monitoring device
TheLEDPAPI66LHAunitcanbeequippedwithanoptionaldeviceformonitoringitsoperatingstatusremotely.
Itisaninternalrelaywithcontactnormallyopen.Thecontactisexternallymadeavailablethroughacablewith
L-823Style6plug.
Thestatusofthecontactreportstheinformationontheoperatingstatusoftheunit:
●Closedcontact:LHAunitinoperatingcondition.
●Opencontact:LHAunitinfaultconditionordisconnected.
Therelayopensthecontactincaseoffault,asdescribedinthepreviousparagraph:tilterror,LEDmodulefault,
supplysystemfault.
Only the monitoring contact of the faulty (or not powered) unit is open, while the unit in
operating condition switch o󰀨 their own LEDs after a few seconds and keep the contact of
the relay closed: in this way the faulty unit can be identied by an external monitoring system
ILCMS (Individual Lamp Control and Monitoring System).

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2.9 Wiring
TowiretheLEDPAPI66systemproperlyusethecablessuppliedalreadyattestedtotheequipment:
●PowercableequippedwithovermoldedconnectorL-823Style1toconnecttothesecondaryoftheisolation
transformer(L-830,L-831)150W.
●Monitoringcable(optional)equippedwithovermoldedconnectorL-823Style6toconnecttothesecondary
oftheisolationtransformer(L-830,L-831)45W.
●Communicationcable(busCAN).
The isolation transformers necessary for the functioning of the unit are not included in the
supply. It is the customer’s responsibility to arrange appropriate certied equipment to
supply the units.
The LHA units communicate with each other by means of a CAN type communication bus.
To work properly the CAN bus must be equipped with two termination resistors at the two
ends of the bus. The termination resistors are installed in the units identied as LHA1 and
LHA4 that must necessarily be installed respectively in the nearest and furthest position
from the runway.

INSTALLATION
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3 INSTALLATION
3.1 Fixture placement
Thesignallingdevices,incombinationwithhorizontalandverticalxtures,provideinformationtothepilotsand
thereforerepresentafundamentaldrivingaid.
Thesedevicesmustalwaysbeinoperatingconditionandmustbeclean,maintainedand,ifnecessary,replaced
assoonastheirvisibilityisa󰀨ected.
Thechromaticfeaturesofsignallingopticaldevicesmustbecompliantwiththedispositionsofcompetentbodies
andwiththeregulationsinforce.
For the features of the xtures always refer to the requirements of the relevant Standards:
• FAA AC150/5345-28H Precision Approach Path indicator (PAPI) Systems: L-880 - System
consisting of 4 light units; L-881 - System consisting of 2 light units
• ICAO Annex 14 Part 1 from 5.3.5.23 to 5.3.5.40 ‑ PAPI and APAPI
• UFC 3-535-01 (§3-7 - PAPI 4 LHA)
Thelightsources must bepositionednear the runwayoriented towards the approachdirection to the landing
runway.ThesidewallsoftheLHAunitmustbetoparalleltotherunwayedge.Thepositioningofthelightunitsof
therunwaymustbeincompliancewithcurrentregulations.
For the positioning of the xtures always refer to the requirements of the relevant Standards:
• FAA 150/5340-30J for the design and the installation of the visual aids in the airports.
• ICAO Annex 14 Part 1 from 5.3.5.23 to 5.3.5.40 ‑ PAPI and APAPI
• UFC 3-535-01 (§3-7 - PAPI 4 LHA)
• DGAC 20580/DNA/2A

INSTALLATION
UT-MT-0972_1.0_19-09-2022 (EN)
Use and Maintenance Manual
LED PAPI 66
20
MONITORING
(optional)
SUPPLY
3.2 Permanent installation
Store the device in its original packaging until the time of installation.
Proceed assembling the device and check the supply features before proceeding with the
installation.
Usethe xture onlyin combinationwith concrete foundationswith adequatecharacteristics (inaccordance to
specicationsFAAandICAO).Attheendofinstallationchecktheproperalignmentofthexture.Incaseofincorrect
positioningopticalmisalignmentsoflightbeamsmayoccur.
The installer is the solely responsible of the proper positioning of the devices, in accordance to the specic
regulation of the di󰀨erent regulatory agencies. For each LHA unit, the height depends on the valuation of
the optical axis respect to the base (established quota in the project of the system).
Before carrying out any intervention on the device, cut o󰀨 all external power sources and
place appropriate work-in-progress warnings on the systems.
Wait for the discharging time (at least 5 min) and check using appropriate instruments that
there are no residual energies before accessing the electrical equipment.