L SERIES UNITS - LENNOX EMEA

1 504,604M*P504604M*02/02*2P0202*GUIDE TO THE M1 6 VERSION INTEGRATED MODULARCONTROL USED IN L SERIES 3 THROUGH 30 TON UNITSL itho ,604M2/2002 Supersedes 504,520M 2002M1 6 VERSION INTEGRATEDMODULAR CONTROL (IMC)L SERIES UNITSTABLE OF CONTENTSIMC BOARD BY UNIT 2.. UNIT MODEL NUMBER 2.. IMC AND ADD ON BOARDS 3.. IMC BOARD LOCATION 3.. IMC BOARD COMPONENTS 4.. UNIT START UP 7.. DIAGNOSTICS 8.. MAIN CONTROL OPERATION12.. LOW AMBIENT FAN CYCLING18.. OPTIONAL ECONOMIZER20.. IAQ OPERATION26.. TESTING UNIT FUNCTION28.. DISPLAYING SENSOR READINGS30.. ECTO CONTROL PARAMETERS32.. IMC BOARD INPUTS AND OUTPUTS40.. SUMMARY SHEET48.

2 IMPORTANT: This manual is for use with IMC board M1 6 version only. Check IMC software versionas shown in figure 9 to be sure the IMC version is integrated modular control system (IMC) is aseries of control boards designed to indicate unitoperation, increase reliability, and maketroubleshooting easier. The IMC providesprogrammable control parameters (such as varyingcompressor on/off intervals). The IMC has thecapability to communicate with personal computersusing the L Connection network. As in standardinstallations, a thermostat or zone sensor is requiredfor system main control, or A55 (M1) board, is the commoncontrol board used in all AL" SERIES UNITS .

3 Add onboards are connected to the main board to Abuild"control variations depending on type and capacity ofunit. An A56 (EM1) economizer add on boardconnects to the M1 board when an optionaleconomizer is installed in the table 1 to determine which IMC control boardsare provided in each unit. Figure 1 identifies unitmodel number. Figure 2 shows the location of add onboards in relation to the main control board. Figure 3shows the IMC board location in each MODULAR CONTROL (IMC)FEATURES Indicates thermostat demand Makes troubleshooting easier Increases unit and component reliability Provides consistent central control location Provides adjustable control parameters Uses the L Connection communicationnetwork to interface with energy managementsystems and personal 2 TABLE 1 IMC BOARDS BY UNITBOXSIZEUNITA55M1A57C1A59C2A60E1A58G1 A61HP1A56EM1AL SERIES 036, 042, 048, 060, 072(3, , 4, 5, & 6 TON)M1 OPTA+LHA088( TON)M1 OPTA+LGA/LCA/LGC/LCC 088 & 100( & TON)

4 M1C1 OPTBLGA/LCA/LGC/LCC102, 120, 150( , 10, TON)M1C1 OPTBLHA090 & 120( & 10 TON)M1HP1 OPTLGA/LGC156, 180, 210, 240, 300S(13, 15, , 20 & 25 TON)M1C1C2G1 OPTCLCA/LCC156, 180, 210, 240, 300S(13, 15, , 20 & 25 TON)M1C1C2 OPTOPTLHA180 & 240(15 & 20 TON)M1 OPTHP1 OPTDLGA/LGC300 & 360(25 & 30 TON)M1C1C2G1 OPTDLCA/LCC300H & 360(25 & 30 TON)M1C1C2 OPTOPTNote: A67 RH1 board is installed in Humiditrol UNITS Revision NumberLGAYUnit TypeL = Commercial Package UnitUnit TypeG = Cooling w/ Gas HeatC = Cooling Only (w/ opt. Electric Heat)H = Heat PumpMajor Design SequenceA = First Generation1180 Cooling Capacity TonsSCooling EfficiencyS = Standard EfficiencyH = High EfficiencyHeat TypeNOTE 3 This space is intentionally left blank.

5 It will be filled in on unit nameplatedepending on type of heat = 208/230vI3 phaseI60hzG = 460vI3 phaseI60hzJ = 575vI3 phaseI60hzM=380/420vI3 phase I50 hzP=208/230v 1 phase 60Hz120=10 ton150=12I1/2 ton156=13 ton180 = 15 ton210 = ton240= 20 ton300=25 ton360=30 ton036=3 ton042=3I1/2 ton048=4 ton060=5 ton072=6 ton088=7 1/2 ton090=7 1/2 ton100=8 1/2 ton102=8I1/2 tonFIGURE 1 UNIT MODEL NUMBERPage 3 IMC AND ADD ON BOARD LOCATION AND OPERATIONA55 (M1):A56 (EM1):OptionalEconomizerand/or PowerExhaust FanA57 (C1):Second comIpressor1 Outdoor fanA58 (G1):Second Gas ValveA60 (E1):Second ElectricHeat SectionA59 (C2):Compressors 3 or 44 Outdoor FansorA61 (HP1):Heat PumpCompressor 23 Outdoor fans1 Reversing valveorFIGURE 21 Blower1 Compressor1 Outdoor fan1 Gas valve1 Reversing valve1 Electric heat sectionorA67 (RH1):Humiditrol ControlHEATSECTIONL Series7?

6 1/2 THROUGH 12?1/2 TONL Series13 THROUGH 30 (M1) MAIN CONTROL PANEL LOCATION BY UNITFIGURE Series3 THROUGH 6 TONPage 4 IMC Board ComponentsLED READOUTOn unit power up the A55 M1 board LED readout willdisplay ", within seconds, the " readout willflash several times and turn off. Error codes are the onlyreadings that will be displayed without DIP switchchanges. See ADiagnostics" THE CONTROLR eset the IMC control with the pushbutton located to theright of the LED readout. Hold down the pushbutton for atleast three seconds to reset the IMC control. The LEDreadout will display ", flash several times, and LEDEach control board has a green flashing Aheartbeat" heartbeat LED will flash indicating normal table 2 for an explanation of heartbeat 2 HEARTBEAT LED OPERATIONHEARTBEATLED STATUSA55 (M1) BOARDADD ON BOARDSFLASHINGNORMALOPERATIONNORMALOPERA TION*FLICKERINGN/ACHECK ELECTRICALCONNECTIONSSTEADY OFFNO VOLTAGE TOM1 BOARD; SEEFIGURE 4NO VOLTAGE TOM1 BOARD.

7 SEEFIGURE 4 STEADY ONDEFECTIVE BOARD(REPLACE)DEFECTIVE BOARD(REPLACE)*A AFLICKERING" LED WILL FLASH SIGNIFICANTLY FASTER THANTHE A55 HEARTBEAT 24 VOLT SUPPLY TO A55(M1) MAIN CONTROL BOARDFIGURE 4P114TB34A55 (M1) BOARD24 VOLTS READ DURINGNORMAL OPERATION + +1 THERMOSTAT INPUT INDICATING LED SThermostat input indicating LED s are located on the M1board above P110 connector. LED S indicate athermostat demand only. See figure INPUT INDICATING LED SFIGURE 5GW1W2Y1Y2 OCP Blower on First stage heat Second stage heat First stage cool Second stage cool OccupiedNOTE LED s are energized by 24 vac thermostat inputs SWITCH SETTINGSMake sure DIP switches are set as shown in figures 6, 7,and 8.

8 DIP switch settings are particular to each type ofunit and must be set correctly for proper unit is optional. Set A56 (EM1) economizer boardDIP switches as shown in economizer Check DIP switches BEFORE applyingpower to unit. The IMC checks switch position onpower up and after a DIP SWITCH SETTINGS (A55)FIGURE 6 LGA/LGC SINGLE PHASEUNITSLHA SINGLE PHASE UNITSLGA/LGC THREE PHASEUNITSLHA THREE PHASE UNITSLCA/LCC SINGLE PHASEUNITSLCA/LCC THREE PHASEUNITSAS hift" switch will be addressed in ATesting Unit Function" "POSITIONAON"POSITIONPage 5 FLASHING GREEN DHEART?BEAT" LED INDICATESNORMAL OPERATIONA55 (M1) MAIN CONTROL BOARDP110 UNIT MODE INDICATORS(THERMOSTAT INPUTS)

9 DIPSWITCHESL CONNECTIONCOMPUTERCOMMUNICATIONPORTSEXPA NSIONPORTEXPANSIONPORTEXPANSIONPORTSLED READOUTSW1SW2SW3 BUSTERMDISPLAYPUSHBUTTONUNITADDRESSMODEU NITP110 NUMBER D1" TO THE RIGHT OF THEPLUG INDICATES TERMINAL NUMBER1 STARTS ON THE RIGHT9 8 7 6 5 4 3 2 1 1 1 1 1 1 MAIN CONTROL BOARDSOFTWARE VERSIONPRINTED ON U12 CHIPNOTE CONNECTOR NOMENCLATURE ONBOARD DENOTES GAS UNIT CONNECTIONCOMMUNICATION BUSTERMINATION JUMPERHPGASSHIFT1 PHUNITRECALLECTOTEMP124816 TEST 1 DATATRANSMITLEDXMITPage 6 IMC Board ComponentsDIP SWITCH SETTINGS ContinuedA59 (C2) DIP SWITCH SETTINGSFIGURE 7 FANCOMP6156 & 180 UNITS which con?

10 Tain four condenser fansand three UNITS which containsix condenser fans andfour , 240, 300S unitswhich contain four con?denser fans and fourcompressors.(C AND D BOX NON HEAT PUMP UNITS ONLY)360 UNITS which containsix condenser fans andthree (HP1) DIP SWITCH SETTINGSFIGURE 8 FANSW12090 & 120 UNITS which contain two & 240 UNITS which contain four (B AND C BOX HEAT PUMP UNITS ONLY;NO HEAT PUMPS IN D BOX SIZE)Switch #2 is not pushbutton has various functions depending on DIPswitch settings. The pushbutton is used to toggle throughdisplay readouts and turn outputs off and Passing DelaysWith DIP switches in normal operation setting, a shortpush of the pushbutton will bypass timers (such ascompressor minimum run, blower delay, and compressorminimum off).