48/50LC 04---06 Single Package Rooftop Units with ComfortLink Controls Version 1.X and PURONr (R---410A) Refrigerant Controls, Start---Up, Operation and Troubleshooting IMPORTANT: This literature covers 48/50LC 04--06 models with ComfortLink Software version 1.x. TABLE OF CONTENTS Relative Humidity Sensor Control . . . . . . . . . . . . . . . . . . . . . . 9 CCN Communication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cooling Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 SAFETY CONSIDERATIONS Economizer Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . 33 Installation and servicing of air-conditioning equipment can be hazardous due to system pressure and electrical components. Only trained and qualified service personnel should install, repair, or service air-conditioning equipment. Untrained personnel can perform the basic maintenance functions of replacing filters.
WARNING FIRE, EXPLOSION HAZARD Failure to follow this warning could result in personal injury, death and/or property damage. Improper installation, adjustment, alteration, service, or maintenance can cause property damage, personal injury, or loss of life. Refer to the User’s Information Manual provided with this unit for more details. Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance. What to do if you smell gas: 1.
Accessory Navigator Display The accessory hand-held Navigator display can be used with the 48/50LLC units. (See Fig. 2.) The Navigator display operates the same way as the Scrolling Marquee device. The Navigator display is plugged into the LEN (local equipment network) port on either CIB or the J3 port on the ECB (economizer control board). Com NA T IM E EWT LW T SETP MO fort VIG Link ATO R 12. 54. 58 44. 6°F 4 4 .
Table 2 – Scrolling Marquee Mode and Menu Display Structure SERVICE TEST Service Test Mode (TEST) ↓ ↓ Test Independent Outputs (INDP) ↓ Test Fans (FANS) Software Version Numbers (VERS) Control Modes (MODE) ↓ Cooling Status (COOL) TEMPERATURES PRESSURES SETPOINTS INPUTS OUTPUTS CONFIGURATION Air Temperatures (AIR.T) Thermostat Inputs (STAT) Fan Outputs (FANS) Display Configuration (DISP) Refrigerant Temperatures (REF.T) General Inputs (GEN.
48/50LC Conventions Used in This Manual The following conventions for discussing configuration points for the local display (Scrolling Marquee or Navigator™ accessory) will be used in this manual. Point names will be written with the Mode name first, then any submodes, then the point name, each separated by an arrow symbol (→). Names will also be shown in bold and italics.
Outdoor--Air Inlet Screens For belt drive units with a power exhaust option, the controls require an accurate supply duct CFM at the unit design point where the indoor fan will run at the Supply Fan Maximum Speed (FS.MX) for proper operation. The supply duct CFM is configured by the Indoor Fan Max Speed CFM (Configuration→ ECON→ IDF.C). Default values for Indoor Fan Max Speed CFM (IDF.C) are at 400 CFM per ton (1200CFM for the 04 size,1600 CFM for the 05 size, and 2000 CFM for the 06 size).
Gas Heat (48LC) Thermostat Control Inspect the gas heat section of the unit. Verify the number of burners match the number of heat exchanger openings and the burner assembly is properly aligned. If the orifices were changed out for elevation or Liquid Propane purposes, verify proper installation. Visually inspect other components in heat section. Verify gas pressures before turning on heat as follows: 1. Turn off field-supplied manual gas stop, located external to unit. 2.
Space Humidistat Control The HUM terminal can be used on the Field Connection board when the isolation relay is installed between the MBB and TB. The Space Humidity Switch configuration, Configuration→UNIT→RH.SW, identifies the normally open or normally closed status of this input at LOW humidity. Relative Humidity Sensor Control For units with the economizer option (with the ECB--economizer control board), the humidity sensor input is provided on the field connection terminal board (TB).
4. Configure the beginning of the occupied time period for Period 1 (OCC). Press ENTER to go into Edit mode, and the first two digits of the 00.00 will start flashing. Use the Up or Down key to display the correct value for hours, in 24--hour (military) time. Press ENTER and hour value is saved and the minutes digits will start flashing. Use the same procedure to display and save the desired minutes value. 5. Configure the unoccupied time for period 1 (UNC).
SERVICE TEST Independent Outputs The independent (INDP) submenu is used to change output status for the economizer, power exhaust stages, and alarm relay. These independent outputs can operate simultaneously with other Service Test modes. All outputs return to normal operation when Service Test is turned off. When the economizer is using the factory default Digital Control Type (Configuration→ECON→E.
CONTROLS OPERATION Remote Occupancy The remote occupancy input is provided on the field connection terminal board (TB). The Remote Occupancy Switch configuration, Configuration→UNIT→RM.SW, identifies the normally open or normally closed status of this input when unoccupied. S RMOC = 24 VAC signal input S R--2 = 24 VAC source for dry contact Fire Shutdown 48/50LC The fire shutdown input is provided for unit shutdown in response to a fire alarm or smoke detector.
Remote Occupancy Switch (RM.SW) System Mode (SYS) This configuration identifies if a remote occupancy switch is installed, and what status (normally open, normally closed) the input is when UNOCCUPIED. SAT Settling Time (SAT.T) In Run Status and Operating Modes, the current system mode is displayed with expandable text. This is an overall state of the unit. Three states are: Unit Operation Disabled, Unit Operation Enabled, or Service Test Enabled.
Heat OAT Lockout (H.LOC) Displays if heating operation is prevented due to outdoor temperature limit lockout. Econo Cool OAT Lockout (E.LOC) Displays if economizer operation for cooling is prevented due to outdoor temperature limit lockout. 48/50LC General Operation 48/50LC units can provide cooling, dehumidification, heating, and ventilation operation. Each unit will operate under one of two basic types of control: thermostat or space temperature sensor.
The following occupancy options are determined by the state of Occupancy Schedule Number (Configuration→CCN→SCH.O →SCH.N) and the Global Schedule Broadcast (Configuration →CCN→ BROD→B.GS). 1. (Configuration→CCN→SCH.O→SCH.N = 0) The unit is always considered occupied and the programmed schedule is ignored. This is the factory default. 2. (Configuration→CCN→SCH.O→SCH.N = 1- 64) Follow the local programmed schedule. Schedules 1 to 64 are local within the controller.
48/50LC override condition is cleared the speed will go to the next commanded speed. Supply Fan Speed 1, 2, and 3 (F.SP1, F.SP2, and F.SP3) These configurations define the intermittent fan speeds used during cooling. Supply Fan Speed 2 (F.SP2) is pre set to the optimum energy efficiency part load speed. Changing this might affect the overall efficiency of the unit. Supply Fan Speed 1 and 3 (F.SP1 and F.SP3) are pre set to transition the fan during cooling stage up, and to aid in dehumidification.
Compressor Control The compressor control works hand and hand with the staging control. As the staging control request stages, the compressor control determines what is available or running and tries to provide stages for what is requested. The availability of the compressor or loader depends on time guards, circuit diagnostics, and outdoor temperature. The Circuit A Lockout Temp (Configuration →COOL →CA.LO) configuration set the outdoor temperature in which the compressor is allowed to run down to.
48/50LC value is below the Space RH Setpoint (RH.SP) minus the Space RH Deadband (Setpoints →RH.DB), then dehumidification is no longer needed. If the unit is configured for space sensor control (Configuration →UNIT →U.CTL = 3), then the setpoint Dehum Heat SP Deadband (Setpoints →RH.HB) applies. This configuration sets the offset above the heating set point at which a unit in dehum mode will turn off. This is a protection against over cooling the space and causing a heat demand.
Staging Control Once the unit is in a heating mode, it must decide what the demand is and how to satisfy. Based on the unit control configuration, requested heating stages (Run Status →HEAT →REQ.H) will be determined then passed to heat control to actually add the heating stages. Thermostat Control There are two ways of requesting stages when thermostat control is enabled, Traditional Thermostat control or Adaptive control. Traditional Thermostat control is used if the Thermostat Control Type (T.
→HT.2), power is supplied to the second stage of the main gas valve. If both stage 1 and stage 2 of the gas valve close, gas will be turned off to the main burners. Economizer If an economizer is installed, then Economizer Installed (Configuration→ECON→EC.EN) should be set to YES. The economizer damper is controlled by the Econo Commanded Position (Outputs→ECON→EC.CP) on the Economizer Control Board (ECB).
Free Cooling The economizer will be allowed to help with cooling (Run Status →MODE→OK.EC = Yes) if the supply air temperature sensor reading is valid, there are no applied lockouts, and there is not a dehumidification demand. There are four economizer lockouts that can be applied at any time. Econo Cool OAT Lockout (Operating Modes→ECON→E.LOC) occurs when the Outdoor Air Temperature (OAT) is greater than the configured Econo Cool Hi Temp Limit (Configuration→ECON→EH.
48/50LC Power Exhaust (Belt Drive VFD units) To enable power exhaust, set Power Exhaust Installed (Configuration→ECON→PE.EN) to YES. Both power exhaust fans are wired together and are controlled by the configuration Power Exhaust Stage1 CFM (Configuration→ECON→PE1.C). When the Indoor Fan Max Speed CFM (Configuration→ECON →IDF.
IAQ (Switch Input) Indoor air quality can also be measured using a switch input. For the purpose of specifying the type of switch input, low CO2 levels are considered normal. The IAQ switch input is defined by the IAQ Switch Input Config (Configuration→AIR.Q→II.CF). Enthalpy and IAQ are controlled by the same switch input and therefore cannot be used simultaneously. II.CF = 0 (No IAQ) The II.CF = 0 configuration signifies that there is no IAQ switch input.
Setting Up the System The settings for temperature compensated start can be found in the local display under Configuration→UNIT. ITEM EXPANSION RANGE UNITS CCN POINT TCS.C Temp.Cmp.Strt.Cool Factr 0 - 60 min TCSTCOOL TCS.H Temp.Cmp.Strt.Heat Factr 0 - 60 min TCSTHEAT CCN OAT Broadcast (BROD→B.OAT) If this configuration is set to ON, the control will periodically broadcast its outside-air temperature at a rate of once every 30 minutes. Temp Comp Strt Cool Factr (TCS.
Configuration→CCN→LDSH→S.GRP This is the Loadshed Group Number and corresponds to the loadshed supervisory devices that resides elsewhere on the CCN network and broadcasts loadshed and redline commands to its associated equipment parts. This variable will default to zero which is an invalid group number. This allows the loadshed function to be disabled until configured. Configuration→CCN→LDSH→R.MXC This configuration tells the unit the maximum cooling stages allowed to be on during a redline condition.
result in the alarm output relay, ALRM, status of ON and 24 vac between C and X on the field connection terminal board when that particular condition is in an alarm state. Setting a configuration to NO will result in no action by the alarm output relay for that particular condition. NOTE: An accessory filter switch can be used along with the alarm relay output function to indicate dirty filter service need.
This alert occurs when the Current Sensor (CS) detects current when the compressor should be off. When this occurs, the control turns off all of the compressor relays, stays in cooling mode and keeps the indoor fan on. Use the Scrolling Marquee to reset the alert. The possible causes are a welded contactor, frozen compressor relay on MBB, or adverse conditions.
48/50LC suction only has to drop 5 PSIG. This alert causes a strike for the circuit. The alert resets automatically. The cause of the alert is usually compressor wiring causing reverse rotation or a faulty compressor. Alarm Code T153 -- Real Time Clock Hardware Failure The alert occurs when the RTC clock chip on the MBB is not responding. Time and date functions will not operate, such as local occupancy schedules. The unit will default to 24/7 unoccupied mode.
Alert Code T410 S R--W1 Jumper Not Installed in Space Temp Mode This alert occurs when the control mode is Space Temperature mode via Auto Select or Space Temp Select, yet there is no power to W1. Verify that space temperature mode is the desired mode or add jumper between R and W1 (on TB). This alert resets automatically. S R--W1 Jumper Must be Installed to Run Heat in Service Test This alert occurs when a request for a heat output has occurred yet the W1 input is not high.
Table 6 – ComfortLink Alarm Codes ALARM OR ALERT NUMBER T051 T064 48/50LC T066 RESET METHOD Add Strike for Circuit A Automatic High---pressure switch open. Compressor internal protection open. Wiring error Turn off all compressors Automatic Welded contactor Limited Diagnostic Automatic Faulty, shorted, or open thermistor caused by wiring error or loose connection.
Red LED Proper operation of the MBB and ECB control boards can be visually checked by looking at the red status LEDs. When operating correctly, the red status LEDs should blink in unison at a rate of once every 2 seconds. If the red LED on the ECB is not blinking, check the DIP switch positions on the board. If the red LEDs are not blinking in unison, verify that correct power is being supplied to all modules. A blinking red LED at the rate of once per second means that software is not loaded on the board.
Cooling Troubleshooting Use the Scrolling Marquee display or a CCN device to view the cooling status display and the cooling diagnostic display (see Appendix A) for information on the cooling operation. Check the current alarms and alarm history for any cooling alarm codes and correct any causes. (See Table 6.) Verify any unique control configurations per installed site requirements or accessories.
5. Because of a mechanical problem with the economizer, the actuator might acquire a new degree of rotation which is less than M.ANG. If this occurs, a “T414 Economizer Damper Actuator Out of Calibration” alert will be generated. This alert can only occur if the economizer is using digital communications (Configuration →ECON→E.CTL = 1 or 2). The economizer calibration procedure (Service Test→IND.P→E.CAL) will reconfigure the actuator to the new fully closed and fully open positions.
Heating Troubleshooting Gas Heat (48LC Units) Use the unit Scrolling Marquee display or a CCN device to view the heating status display and the heating diagnostic display (see Appendix A) for information on the heating operation. Check the current alarms and alarm history for any heating alarm codes and correct any causes. (See Table 6.) Verify any unique control configurations per installed site requirements or accessories.
1 FLASH - INDOOR FAN DELAY MODIFIED (HEATING) FLASHING 2 FLASHES - OPENING OF LIMIT SWITCH 24 VOLTS BETWEEN F1 AND C OFF LED is DEFECTIVE IGC BOARD No ON 3 FLASHES - FLAME SENSOR INDICATES FLAME WITH CLOSED GAS VALVE YES 1. BLOWN 5 AMP FUSE 2. DEFECTIVE 24V TRANS. 3. BROKEN WIRE 4.
Table 11 – IGC Board LED Alarm Codes LED FLASH CODE On Off Normal Operation Hardware Failure 1 Flash 48/50LC ACTION TAKEN BY CONTROL DESCRIPTION RESET METHOD — PROBABLE CAUSE — — No gas heating. — Loss of power to the IGC. Check 5 amp fuse on IGC, power to unit, 24V circuit breaker, transformer, and wiring to the IGC. High temperature limit switch opens during heat exchanger warm-up period before fan-on delay expires. High temperature limit switch opens within 10 minutes of heat call (W) Off.
Phase Loss Protection The phase loss protection option will monitor the three-phase electrical system to provide phase reversal and phase loss protection. Phase Reversal Protection If the control senses an incorrect phase relationship, the relay (K1) will be de-energized (opening its contact). If the phase relationship is correct, the relay will be energized. The control has a self-bypass function after a pre-set time.
48/50LC SCT.A SCT.A Size 04 Units Size 05 & 06 Units Fig. 10 -- Saturated Condensing Temperature Thermistor Location — 48/50LC04--06 Transducer Troubleshooting The electronic control uses suction pressure transducers to measure the suction pressure of the refrigerant circuits. The pressure/voltage characteristics of these transducers are in shown in Table 15, the 5vdc power is applied to legs A and B of the transducer and legs B to C represent the signal voltage.
Table 13 – Temperature (_F) vs Resistance/Voltage Drop Values for OAT, SAT, and SPT Thermistors (10K at 25_C Type II Resistors) 54 55 56 57 58 RESISTANCE (Ohms) 196,453 189,692 183,300 177,000 171,079 165,238 159,717 154,344 149,194 144,250 139,443 134,891 130,402 126,183 122,018 118,076 114,236 110,549 107,006 103,558 100,287 97,060 94,020 91,019 88,171 85,396 82,729 80,162 77,662 75,286 72,940 70,727 68,542 66,465 64,439 62,491 60,612 58,781 57,039 55,319 53,693 52,086 50,557 49,065 47,627 46,240 44,888
48/50LC Table 14 – Temperature (_F) vs. Resistance/Voltage Drop Values for SCT Sensors (5K at 25_C Resistors) TEMP (F) –25 –24 –23 –22 –21 –20 –19 –18 –17 –16 –15 –14 –13 –12 –11 –10 –9 –8 –7 –6 –5 –4 –3 –2 –1 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 RESISTANCE (Ohms) 3.699 3.689 3.679 3.668 3.658 3.647 3.636 3.624 3.613 3.601 3.588 3.576 3.563 3.550 3.536 3.523 3.509 3.494 3.
PRESSURE (psig) 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 VOLTAGE DROP (V) 0.465 0.485 0.505 0.524 0.544 0.564 0.583 0.603 0.623 0.642 0.662 0.682 0.702 0.721 0.741 0.761 0.780 0.800 0.820 0.839 0.859 0.879 0.898 0.918 0.938 0.958 0.977 0.997 1.017 1.036 1.056 1.076 1.095 1.115 PRESSURE (psig) 68 70 72 74 76 78 80 82 84 86 88 90 92 94 96 98 100 102 104 106 108 110 112 114 116 118 120 122 124 126 128 130 132 134 VOLTAGE DROP (V) 1.135 1.154 1.174 1.
48/50LC Fig.
48/50LC Fig.
48/50LC Fig.
48/50LC Fig.
48/50LC Fig.
Main Base Board (MBB) The MBB also receives the Current Sensor inputs for compressors and other discrete or digital inputs. The MBB reads space temperature (SPT) from either a T-55, T-56 or T-58 device and space temperature offset (SPTO) from a T-56 device. See Field-Installed Accessories section. The MBB controls 11 relays. NOTE: The Main Base Board (MBB) has a 3-position instance jumper that is factory set to ‘1.’ Do not change this setting. See Fig. 16 and Table 16.
Table 16 – Main Base Board (MBB) Connections DISPLAY NAME POINT DESCRIPTION SENSOR LOCATION TYPE OF I/O CONNECTION PIN NUMBER 48/50LC INPUTS Input power from TRAN2 control box 24 VAC J1, 1--- 3 IGC.
Economizer Control Board (ECB) 48/50LC The ECB controls the economizer actuator. (See Fig. 17 and Table 17.) The control signal from the ECB uses either the MFT (Multi-Function Technology) digital communication protocol or a 4 to 20 mA output signal as defined by the configuration Configuration→ECON→E.CTL. The ECB has inputs for Indoor Air Quality (IAQ), Outdoor Air Quality (OAQ), enthalpy and RH sensor. It also controls two power exhaust outputs.
Table 17 – Economizer Control Board (ECB) Connections DISPLAY NAME SENSOR LOCATION POINT DESCRIPTION TYPE OF I/O CONNECTION PIN NUMBER INPUTS Input power from MBB control box 24 VAC J1, 1--- 2 RM.OC Remote occupancy switch field installed switch input J4, 2 ENTH or IAQ.S Outdoor enthalpy switch, or Indoor air quality switch economizer, or return/space switch input J4, 4 IAQ Indoor air quality sensor return/space 0--- 20 mA J5, 2 OAQ or SP.
Integrated Gas Control (IGC) Board The IGC is provided on gas heat units. (See Fig. 18 and Table 18.) The IGC controls the direct spark ignition system and monitors the rollout switch, limit switch, and induced-draft motor Hall Effect switch. 48/50LC RED LED-STATUS C07028 Fig.
Low Voltage Terminal Board (TB) The field connection terminal board has 30 terminals oriented in 3 rows of 10 terminals. The front has screw terminals and the back has spade connectors. This board provides connection fo the thermostat, space sensor, and most field installed accessories. See Table 19.
CONNECTION LABEL DDC T’STAT ECON PIN NUMBER CLO2/ COMP2 CIRCUIT 1 CIRCUIT 2 CONTRL BOARD PMR UNIT SHUTDOWN 24Vac FROM 24Vac TO ECON 7 Cool 1 Call MBB 6 Cool 2 Call MBB ECON 5 Heat Stage 1 Call MBB CONTL BOARD 4 Heat Stage 2 Call MBB CONTL BOARD 3 IGC Fan Input MBB CONTL BOARD 1,2 Cool 1 Call jumper DDC T’STAT CLO1/COMP1 3,4 Cool 2 Call jumper DDC T’STAT CLO2/COMP2 3 CLO1/ COMP1 POINT DESCRIPTION 4,5 Comp 1 Contactor Common CTB C C1 --- Coil Comp 1 jumper ECON CI
Variable Frequency Drive (VFD) Table 21 – VFD Connections On units equipped with supply fan VFDs, the indoor fan motor is controlled by a 3-phase VFD. The supply fan VFD is located in the supply fan section behind the access door. These units use ABB VFDs. The VFD varies the frequency of the AC voltage supplied to the indoor fan. This allows the variance in the speed of the fan. The VFD is always powered during normal operation and the fan is stopped by driving the speed to 0. Fig.
Table 22 – VFD Parameters Configured by Factory or VFD Keypad Parameter Group Parameter Title Options EFB Protocol ABB Parameter HVAC Default COMM PROT SEL 9802 NOT SEL CARRIER LEN (6) EFB PROTOCOL ID 5301 0000 hex 0601 hex EFB STATION ID 5302 0 41 EFB BAUD RATE 5303 9.6 kb/s 38.
Table 26 – VFD Motor Default Configurations UNIT SIZE (Digits 7 & 8) UNIT VOLTAGE (Digit 12) 208/230v (5) 03 460v (6) 575v (1) 208/230v (5) 04 460v (6) 575v (1) 208/230v (5) 48/50LC 05 460v (6) 575v (1) UNIT STATIC OPTION (Digit 10)* Medium (2) High (3) Medium (2) High (3) Medium (2) High (3) Medium (2) High (3) Medium (2) High (3) Medium (2) High (3) Medium (2) High (3) Medium (2) High (3) Medium (2) COMFORTLINK CCN POINT (DISPLAY MENU ITEM) VFD1NVLT (N.VLT) VFD1NAMP (N.AMP) VFD1NFRQ (N.
If diagnostics troubleshooting has determined that the drive is defective during the warranty period, contact ABB Automation Inc., at 1--800--435--7365, option 4, option 3. A qualified technician will review the problem with the caller and make a determination regarding how to proceed. This may involve dispatching a designated service station (DSS) representative from an authorized station, dispatching a replacement unit, or advising return for repair.
Table 27 — FAULT CODES (cont) FAULT CODE FAULT NAME IN PANEL 101--- 105 SYSTEM ERROR Error internal to the drive. Contact Carrier and report the error number. 201--- 206 SYSTEM ERROR Error internal to the drive. Contact Carrier and report the error number. 1000 PAR HZRPM 1001 48/50LC 1004 Parameter values are inconsistent. Check that 2007 MINIMUM FREQ is negative, when 8123 PFA ENABLE is active. PAR PFA IOCNF Parameter values are inconsistent.
Table 28 — ALARM CODES (cont) ALARM NAME IN PANEL 2013* AUTORESET 2014 AUTOCHANGE 2015 PFA INTERLOCK 2016 --- 2017* OFF BUTTON 2018 PID SLEEP DESCRIPTION AND RECOMMENDED CORRECTIVE ACTION This alarm warns that the drive is about to perform an automatic fault reset, which may start the motor. To control automatic reset, use parameter group 31 (AUTOMATIC RESET). This alarm warns that the PFA autochange function is active.
To connect the unit to the network: 1. Turn off power to the control box. 2. Cut the CCN wire and strip the ends of the red (+), white (ground), and black (–) conductors. (Substitute appropriate colors for different colored cables.) 3. Connect the red wire to (+) terminal on CIB, the white wire to COM terminal, and the black wire to the (–) terminal. 4.
Compressor Protection Overcurrent Each compressor has internal line break motor protection. Overtemperature Each compressor has an internal protector to protect it against excessively high discharge gas temperatures. High--Pressure Switch If the high-pressure switch trips, the compressor will shut down and the compressor safety alarm should trip. Refer to the Alarm section for compressor safety alarms.
TB1-T55 1 2 RED RED BLK BLK RED RED RED BLK BLK BLK TO MAIN BASE BOARD SENSOR 1 SENSOR 2 SENSOR 3 SENSOR 4 SPACE TEMPERATURE AVERAGING --4 T-55 SENSOR APPLICATION 48/50LC TB1-T55 1 2 RED RED RED BLK BLK BLK TO MAIN BASE BOARD SENSOR 1 SENSOR 3 BLK RED SENSOR 2 LEGEND TB -- Terminal Block ______ -- Factory Wiring _ _ _ _ -- Field Wiring RED RED BLK BLK SENSOR 5 SENSOR 6 BLK RED SENSOR 4 RED RED BLK BLK SENSOR 7 SENSOR 8 SENSOR 9 SPACE TEMPERATURE AVERAGING --9 T
Carrier Accessory Kits Enthalpy Sensors There are specific accessory kits sold for various field installed accessories. These kits vary based on model, size, voltage, manufacture date, and duct orientation. Some of these kits include Economizer, Power Exhaust, and Electric Heat. Refer to the Controls Quick Set--Up section for configuration and more information on these accessories. The enthalpy accessories are field-installed accessories.
APPENDIX — LOCAL DISPLAY AND CCN TABLES MODE — RUN STATUS ITEM 48/50LC RUN STATUS VIEW HVAC OCC SAT ALRM TIME VERS MBB ECB MARQ VFD1 NAVI MODE SYS HVAC F. MOD HV.DN EFF.C EFF.H OCC T.OVR LINK D.LMT C.LOC H.LOC OK.EC COOL DMD.C AVL.C REQ.C MAX.C LMT.C F.SPD CMP.A TG.A LDR.A TG.L SST.A SSP.A SCT.A SCP.A HEAT DMD.H AVL.H REQ.H MAX.H LMT.H F.SPD HT.1 TG.H1 HT.2 TG.H2 ECON EC.CP EC.AP EC.MP IAQ.S IAQ OAT RAT ENTH OAQ PE.1 PE.
APPENDIX — LOCAL DISPLAY AND CCN TABLES MODE — RUN STATUS (cont) S.VFD SPD RPM FREQ AMPS TORQ PWR VDC V.OUT TEMP RUN.T KWH LFC HRS A1 A.LDR IDF1 IDF2 IDF3 HT.1 HT.2 PE.1 PE.2 ALRM L.ODF STRT A1 A.LDR IDF1 IDF2 IDF3 HT.1 HT.2 PE.1 PE.2 ALRM L.
APPENDIX — LOCAL DISPLAY AND CCN TABLES MODE — RUN STATUS (cont) (GENERIC = CCN only) CCN TABLE/ Sub--- TABLE GENERIC (LON_DATA = CCN only) LON_DATA ITEM EXPANSION RANGE UNITS CCN POINT CCN WRITE STATUS 48/50LC up to 20 points nviSpaceTemp nviSetPoint nvoSpaceTemp nvoUnitStatus.mode nvoUnitStatus.heat_out_p nvoUnitStatus.heat_out_s nvoUnitStatus.cool_out nvoUnitStatus.econ_out nvoUnitStatus.fan_out nvoUnitStatus.
APPENDIX — LOCAL DISPLAY AND CCN TABLES MODE — SERVICE TEST ITEM EXPANSION RANGE UNITS CCN TABLE/Sub--- TABLE CCN POINT SERVICE TEST TEST Field Service Test Mode INDP Test Independent Outputs Off/On (TEST = display only) TESTINDP ECON Economizer Position Test 0 to 100 E.CAL Calibrate Economizer Off/On S_ECOCAL PE.1 Power Exhaust 1 Test Off/On S_PE_1 PE.2 Power Exhaust 2 Test Off/On S_PE_2 ALRM Alarm Relay Test Off/On S_ECONO S_ALMOUT TESTFANS Test Fans F.
APPENDIX — LOCAL DISPLAY AND CCN TABLES MODE — INPUTS ITEM EXPANSION RANGE INPUTS CCN POINT CCN WRITE STATUS DISPLAY WRITE STATUS STATUS DISPLAY STAT UINPUT Thermostat Inputs Y1 Thermostat Y1 Input Off/On Y1 forcible forcible Y2 Thermostat Y2 Input Off/On Y2 forcible forcible W1 Thermostat W1 Input Off/On W1 forcible forcible W2 Thermostat W2 Input Off/On W2 forcible forcible G Thermostat G Input Off/On G forcible forcible General Inputs General Inputs FIL.
APPENDIX — LOCAL DISPLAY AND CCN TABLES MODE — CONFIGURATIONS EXPANSION RANGE UNITS DEFAULT CONFIGURATION DISP CCN TABLE/ Sub--- TABLE CCN POINT PAGE NO.
APPENDIX — LOCAL DISPLAY AND CCN TABLES MODE — CONFIGURATION (cont) ITEM 48/50LC COOL EXPANSION RANGE UNITS DEFAULT CCN TABLE/ Sub--- TABLE CCN POINT COOL_CFG Cooling Configuration N.STG Number of Stages 1 to 2 MRT.C Compressor Min On Time 120 to 999 MOT.C Compressor Min Off Time 300 to 999 RST.C Runtime to Reset Strikes C.DEC PAGE NO.
APPENDIX — LOCAL DISPLAY AND CCN TABLES MODE — CONFIGURATION (cont) ECON EXPANSION RANGE UNITS DEFAULT CCN TABLE/ Sub--- TABLE CCN POINT PAGE NO. ECON_CFG Economizer Configuration EC.EN Economizer Installed No/Yes No: no FIOP Yes: FIOP ECONO 20 E.CTL Economizer Control Type 1 ECON_CTL 20 MP.25 Econ Min at 25% Fanspeed 1=Dig/Position 2=Dig/Command 3=Analog Ctrl 0 to 100 % 0 MINP_25 21 MP.50 Econ Min at 50% Fanspeed 0 to 100 % 0 MINP_50 21 MP.
APPENDIX — LOCAL DISPLAY AND CCN TABLES MODE — CONFIGURATION (cont) ITEM ALM.O RANGE UNITS DEFAULT CCN TABLE/ Sub--- TABLE CCN POINT SPT/SPRH Sensor Failure No/Yes Yes SPACE_AL A.SRT SAT/RAT Sensor Failure No/Yes Yes SATRATAL A.OAT OAT Thermistor Failure No/Yes Yes OAT_AL A.CS Current Sensor Failure No/Yes No CS_AL A.CMP Compressor Failure No/Yes Yes COMP_AL A.CKT Refrig Circuit Failure No/Yes Yes CKT_AL A.SSP SSP Transducer Failure No/Yes Yes SSP_AL A.
APPENDIX — LOCAL DISPLAY AND CCN TABLES MODE — CONFIGURATION (cont) ITEM SCH.O EXPANSION RANGE UNITS CCN TABLE/ Sub--- TABLE CCN POINT PAGE NO. SCHEDOVR CCN Schedule Overrides SCH.N Schedule Number HOL.G Accept Global Holidays 0 = Always Occupied 1---64 = Local Schedule 65---99 = Global Schedule No/Yes OV.TL Override Time Limit 0 to 4 hours OV.EX Timed Override Hours 0 to 4 hours OV.
APPENDIX — LOCAL DISPLAY AND CCN TABLES MODE — TIME CLOCK ITEM EXPANSION RANGE UNITS TIME CLOCK CCN POINT CONFIGURATION TIME Time of Day TIME Hour and Minute DATE TIME xx.xx hh.mm TIME Current Date MNTH Month of Year January, February, ..., December MOY DOM Day of Month 1 to 31 DOM YEAR Year xxxx YOCDISP DAY Day of Week Monday, Tuesday, ..., Sunday DOWDISP DST 48/50LC CCN TABLE/ Sub--- TABLE DEFAULT Daylight Savings Config. BRODEFS (continued) STR.
APPENDIX — LOCAL DISPLAY AND CCN TABLES MODE — OPERATING MODES EXPANSION RANGE UNITS OPERATING MODES MODE SYS HVAC F.MOD F.OVR HV.DN EFF.C EFF.H OCC T.OVR LINK D.LMT C.LOC H.LOC OK.EC COOL COOL OK.CL MS.TG OK.EC OK.MC C.LOC CA.LO F.MOD F.SPD AVL.C REQ.C LMT.C ACT.C CMP.A LDR.A L.ODF ST.A ST.L HPS.A LSST LS.CT FLLO FLSU SAT SAT SA.DM SA.PD SA.ND SAT.U SAT.L SA.TR SA.DR SPT SPT DMD.C TRD.C CL.PD CL.ND C.LAG DHUM HUM SP.RH AVL.R REQ.R ACT.
APPENDIX — LOCAL DISPLAY AND CCN TABLES MODE — OPERATING MODES (cont) 48/50LC ITEM HEAT HEAT OK.HT MS.TG H.LOC HT.LO IGC.F F.MOD F.SPD AVL.H REQ.H LMT.H ACT.H HT.1 HT.2 SAT SAT.H SAT SAM.L SAM.U SPT SPT DMD.H TRD.H HT.PD HT.ND H.LAG ECON EC.EN OK.EC OCC F.MOD F.SPD COOL OAT RAT E.LOC D.LOC EH.LO EL.LO FC.LO EN.LO EC.MX AQ.DV AQ.MN AQ.OV OVR.P AQ.LO OAQ.L LP.OV EC.CP EC.AP EC.MP C.ANG E.CAL DMD.L D.LMT LMT.C LMT.H REDL SHED MAX.C MAX.
APPENDIX — LOCAL DISPLAY AND CCN TABLES MODE — OPERATING MODES (cont) (LINKDATA = CCN only) (OCCDEFM = CCN only) EXPANSION CCN --- Linkage Supervisory Element # Supervisory Bus Supervisory Block Number Average Occup. Heat Stp. Average Occup. Cool Stp. Average Unocc. Heat Stp. Average Unocc. Cool Stp. Average Zone Temperature Average Occup.
CONTROL SET POINT AND CONFIGURATION LOG MODEL NO.: SOFTWARE VERSIONS SERIAL NO.: MBB: CESR131505----_ _ DATE: ECB: CESR131249----_ _ TECHNICIAN: MARQ: CESR131171----_ _ INDICATE UNIT SETTINGS BELOW CONTROL TYPE: Thermostat/T55 Space Temp./T--56 Space Temp./T--58 Space Temp.
MODE — CONFIGURATION (cont) I.FAN EXPANSION RANGE UNITS DEFAULT CCN TABLE/ Sub--- TABLE CCN POINT FTYP Indoor Fan Type 1=LEN VFD 2=ECM 1 2: Direct Drive Fan FAN_TYPE NSPD Number of Speeds 2 or 3 0 NUM_SPDS SMT.F Smart Fan Control No/Yes Yes No (Direct Drive Fan) SMARTFAN OC.FN Fan On When Occupied No/Yes Yes OCC_FAN IDF.F Shut Down on IDF Failure No/Yes Yes FATALFAN FS.MX Supply Fan Maximum Speed 80 to 100 100 SPEEDMAX F.
MODE — CONFIGURATION (cont) ITEM HEAT EXPANSION RANGE UNITS DEFAULT CCN TABLE/ Sub--- TABLE CCN POINT HEAT_CFG Heating Configuration HT.TY Type of Heat Installed N.HTR Number of Heat Stages 0=No Heat 1=Gas 2=Electric 1 to 2 0 (50 series with no electric heat) 1 (48 series) 2 (50 series with electric heat) 2 (all except below) 1 (48 series Low Nox or single phase unit) 1 (50 series with low or medium heat) 1 (50 series 04---05 with high heat) HEATTYPE MRT.
MODE — CONFIGURATION (cont) AIR.Q IA.CF EXPANSION Air Quality Config. IAQ Analog Input Config IA.FN IAQ Analog Fan Config II.CF IAQ Switch Input Config II.FN IAQ Switch Fan Config AQ.MN OVR.P OA.CF Econo Min IAQ Position IAQ Override Position OAQ Analog Input Config OAQ.L AQD.L AQD.H DF.ON DF.OF I.4M I.20M O.4M O.20M H.4M H.20M ALM.O A.SPC A.SRT A.OAT A.CS A.CMP A.CKT A.SSP A.SCT A.FAN A.FIL A.TST A.ECO PID EC.P EC.I EC.D EC.DT EC.DB LK.P LK.I LK.D LK.
MODE — CONFIGURATION (cont) ITEM TRIM RANGE UNITS DEFAULT Sensor Calibration CCN TABLE/ Sub--- TABLE CCN POINT Space Temp Calibration --- 30 to 130 °F SPT.T Space Temp Trim --- 30 to 30 ^F SAT.C Supply Air Temp Calib. --- 30 to 130 °F SAT.T Supply Air Temp Trim --- 30 to 30 ^F RAT.C Return Air Temp Calib. --- 30 to 130 °F RAT.T Return Air Temp Trim --- 30 to 30 ^F 0 0 0 CCN CONFIGURATION CCN Configuration 48_50_LC CCN.A CCN Element Number 1 to 239 1 CCN.
UNIT START-UP CHECKLIST MODEL NO.
48/50LC Copyright 2012 Carrier Corp. S 7310 W. Morris St. S Indianapolis, IN 46231 Edition Date: 04/12 Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
