Carrier 48HC 04-28 Controls, Start-Up, Operation And Troubleshooting
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Carrier 48HC 04-28 Controls, Start-Up, Operation And Troubleshooting

Single package rooftop units with comfortlink controls version 3.x and puron (r-410a) refrigerant
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Controls, Start-Up, Operation and

TABLE OF CONTENTS

SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . 3
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
BASIC CONTROL USAGE . . . . . . . . . . . . . . . . . . . . . 4
ComfortLink Control . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Scrolling Marquee . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Accessory Navigator™ Display . . . . . . . . . . . . . . . . . 4
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
CCN Tables and Display . . . . . . . . . . . . . . . . . . . . . . . 6
Force Hierarchy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Generic Status Display Table . . . . . . . . . . . . . . . . . . . 6
Conventions Used in This Manual . . . . . . . . . . . . . . . 7
START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Unit Preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Compressor Mounting . . . . . . . . . . . . . . . . . . . . . . . . 7
Refrigerant Service Ports . . . . . . . . . . . . . . . . . . . . . . 7
Crankcase Heater(s) . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Compressor Rotation . . . . . . . . . . . . . . . . . . . . . . . . . 7
Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Internal Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Evaporator Fan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Condenser Fans and Motors . . . . . . . . . . . . . . . . . . . 8
Return-Air Filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Outdoor-Air Inlet Screens . . . . . . . . . . . . . . . . . . . . . 8
Accessory Installation . . . . . . . . . . . . . . . . . . . . . . . . 8
Orifice Change (48HC) . . . . . . . . . . . . . . . . . . . . . . . . 8
Gas Heat (48HC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Units with EnergyX® System . . . . . . . . . . . . . . . . . . 10
CONTROLS QUICK SET-UP . . . . . . . . . . . . . . . . . . . 11
Thermostat Control . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Wired (T-55 or T-56 or T-59) . . . . . . . . . . . . . . . . . 11
T-58 Communicating Room Sensor . . . . . . . . . . . . 12
CCN Linkage Control . . . . . . . . . . . . . . . . . . . . . . . . 12
Thermidistat Control . . . . . . . . . . . . . . . . . . . . . . . . . 12
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Catalog No. 0453480236-01
with ComfortLink Controls Version 3.X and Puron
Troubleshooting
PAGE
Printed in U.S.A.
Form 48/50HC-05T
Single Package Rooftop Units
Space Humidistat Control . . . . . . . . . . . . . . . . . . . . .12
Relative Humidity Sensor Control . . . . . . . . . . . . . .12
CCN Communication . . . . . . . . . . . . . . . . . . . . . . . . .12
Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
Programming Operating Schedules . . . . . . . . . . . . .13
SERVICE TEST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
Independent Outputs . . . . . . . . . . . . . . . . . . . . . . . . .15
Fan Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
Cooling Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
Humidi-MiZer® Test . . . . . . . . . . . . . . . . . . . . . . . . . .15
Heating Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
THIRD PARTY CONTROL . . . . . . . . . . . . . . . . . . . . .16
Cooling/Heating Control . . . . . . . . . . . . . . . . . . . . . .16
Dehumidification Control . . . . . . . . . . . . . . . . . . . . .16
Remote Occupancy . . . . . . . . . . . . . . . . . . . . . . . . . .16
Fire Shutdown . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
Alarm Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
Economizer Damper Control . . . . . . . . . . . . . . . . . .16
CONTROLS OPERATION . . . . . . . . . . . . . . . . . . . . .16
Display Configuration . . . . . . . . . . . . . . . . . . . . . . . .16
Unit Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . .16
Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
General Operation . . . . . . . . . . . . . . . . . . . . . . . . . . .18
Temperature Setpoint Determination . . . . . . . . . . . .18
Occupancy Determination . . . . . . . . . . . . . . . . . . . .18
Cooling Operation . . . . . . . . . . . . . . . . . . . . . . . . . . .20
Heating Operation . . . . . . . . . . . . . . . . . . . . . . . . . . .21
Economizer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23
Pg 1
48/50HC 04-28
(R-410A) Refrigerant
7-19
Replaces: 48/50HC-04T

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  • Page 1: Table Of Contents

    48/50HC 04-28 Single Package Rooftop Units with ComfortLink Controls Version 3.X and Puron (R-410A) Refrigerant Controls, Start-Up, Operation and Troubleshooting TABLE OF CONTENTS Space Humidistat Control .....12 Relative Humidity Sensor Control .
  • Page 2 Accessory Navigator™ Display ....83 • CCN ALARM BROADCAST Carrier Comfort Network® (CCN) Interface ..84 • ALARM RELAY OUTPUT Protective Devices ......84 EnergyX®...

  • Page 3: Safety Considerations

    • FILTERS injury or death. CAUTION is used to identify unsafe practices, • OUTDOOR-AIR INLET SCREENS which may result in minor personal injury or product and property damage. NOTE is used to highlight suggestions EnergyX Component Lubrication ....94 which will result in enhanced installation, reliability, or EnergyX Wheel Drive Adjustment .

  • Page 4: General

    Fig. 1 — Scrolling Marquee The ComfortLink controller is fully communicating and cable- Accessory Navigator™ Display ready for connection to the Carrier Comfort Network ® (CCN) The accessory hand-held Navigator display can be used with the building management system.

  • Page 5: Operation

    Table 2 — Scrolling Marquee Mode and Menu Display Structure SERVICE TIME OPERATING TEMPERATURES PRESSURES SETPOINTS INPUTS OUTPUTS CONFIGURATION ALARMS STATUS TEST CLOCK MODES Display Configuration (DISP)  Unit Configuration (UNIT) Auto View of  Run Status (VIEW) Indoor Fan ...

  • Page 6: System Pilot™ And Touch Pilot™ Devices

    Point, and Maintenance) may be collected and displayed. ble air source, universal controller, and all other devices oper- ating on the Carrier communicating network. In the Service-Config table section, there is a table named “GENERICS.” This table contains placeholders for up to 20...

  • Page 7: Conventions Used In This Manual

    This requires that any previous table database be completely Compressor Rotation removed first. Failure to do this will not allow the user to dis- play the new points that have been created and the CCN inter- CAUTION face will have a different table database than the unit control. EQUIPMENT DAMAGE HAZARD Conventions Used in This Manual Failure to follow this caution may result in damage to the...

  • Page 8: Belt Drive Units

    CFM allowed in the product data for heating and to High Altitude section to identify the correct orifice size for cooling. the elevation. Purchase these orifices from your local Carrier dealer. Follow instructions in accessory Installation Instruc- For belt drive units with a power exhaust option, the controls tions to install the correct orifices.
  • Page 9 INDOOR BLOWER ACCESS CONTROL BOX PANEL ACCESS PANEL FILTER ACCESS PANEL GAS SECTION INDOOR COIL ACCESS PANEL ACCESS PANEL UNIT FRONT UNIT BACK Fig. 4 — 48/50HC SRT Units, Panel and Filter Locations (48HC*06 Unit Shown) INDOOR BLOWER ACCESS PANEL OUTDOOR AIR SCREEN (HIDDEN)

  • Page 10: Gas Heat (48Hc)

    START-UP CHECK LIST Gas Heat (48HC) Inspect the gas heat section of the unit. Verify the number of Use the EnergyX Unit Start-Up Checklist (see page CL-1) in burners match the number of heat exchanger openings and the conjunction with the base unit Start-Up checklist from the base burner assembly is properly aligned.

  • Page 11: Erv With Economizer Additional Configurations

    Min DCV Outside Air CFM (DCV.M) major components section of this manual or the specific accesso- ry literature for more detail on these. This sets the lowest setting for ventilation using outside air. This number sets the absolute minimum for ventilation of con- taminants and CO generated by sources other than people.

  • Page 12: T-58 Communicating Room Sensor

    Unit Control Type configuration, Configura- Relative Humidity Sensor Control   tion UNIT U.CTL, must be set to Space Sensor (3). The For units with the factory installed Humidi-MiZer option and the jumper wire in the installer’s packet must be connected be- economizer option (with the ECB-economizer control board), tween R and W1 on TB for heating mode to operate.

  • Page 13: Iaq Sensor

    NOTE: An IAQ switch cannot be used if an enthalpy switch is al- protection has been enabled, the user will be prompted to ready on this input. enter the password before any new data is accepted. SCH.N has a range of 0 to 99. The default value is 1. A value of 0 is IAQ SENSOR always occupied, and the unit will control to its occupied set If an CO...
  • Page 14 Table 5 — Setting an Occupied Time Schedule —Weekdays Only for 7:30 to 22:30 KEYPAD DISPLAY MENU SUB-SUB MODE ITEM DISPLAY ITEM EXPANSION COMMENT ENTRY ENTER Local Occupancy Schedule ENTER OCC.1 Period Occupied Time ENTER 00.00 Scrolling stops ENTER 00.00 Hours Flash 07.00 Select 7...

  • Page 15: Service Test

    compressor is on. All normal cooling alarms and alerts are SERVICE TEST functional. The Service Test function can be used to verify proper opera- NOTE: Circuit A will always be operated with Circuit B. tion of compressors, heating stages, Humidi-MiZer system, in- door fan, power exhaust fans, economizer, and the alarm relay.

  • Page 16: Heating Test

    Minimum Position). When IA.CF = 3, an external 4 to 20 mA Heating Test source is used to move the damper 0% to 100% directly. The heating (HEAT) submenu is used to change output status IAQ = 4-20mA + signal for the individual heat stages, gas or electric.

  • Page 17: Modes

      Fan Status Switch (FN.SW) The Unit Control Type (Configuration UNIT U.CTL) de- fines if temperature control is based on thermostat inputs or This configuration identifies if a fan status switch is installed, space temperature sensor input. and what status (normally open, normally closed) the input is when the indoor fan is OFF.

  • Page 18: General Operation

     Heat Setpoint In Effect (EFF.H) (Setpoints OHSP) are active. When the building is in unoc- cupied mode, Unoccupied Cool Setpoint (Set- This shows the actual setpoint that is being used for control during  points UCSP) and the Unoccupied Heat Setpoint (Set- heating mode.

  • Page 19: Level 3 Priority

    enabled. The fan will remain on if compressors or heat relays are ever stuck on. If configured for fan status switch (FN.SW) and STATE OF SWITCH SWITCH TYPE OF SWITCH AND STATE OF Shut Down on IDF Failure is enabled (Configuration CONFIGURATION OCCUPANCY ...

  • Page 20: Constant Volume (Cv) Units (Ftyp = 1-Speed)

    Fan Speed - IAQ Override (FS.AQ) speed and wait 10 minutes. If the alarm is still active it will ramp to the next highest configured speed for 10 minutes, and This configuration defines the fan speed used when an IAQ so on until commanding FS.MX.

  • Page 21: Staging Control

      cooling demand drops below -0.5°F or if any of the above con- Modes COOL SA.TR) and the Cool Demand Trend (Oper-   ditions turn false. If only a dehumidification demand exists and ating Modes COOL TRD.C). These trends will show the the heat demand becomes greater than the Reheat Heat Set- control how the space is reacting to the current running condi- ...

  • Page 22: Heating Mode Control

    HEATING MODE CONTROL STAGING CONTROL   The heating HVAC mode (Run Status MODE HVAC=4), Once the unit is in a heating mode, it must decide what the de- represents both types of heating (gas or electric) under all types of mand is and how to satisfy.

  • Page 23: Economizer

    time are displayed as Available Heating Stages (Run Sta- for ventilation, cooling and to control the power exhaust. If the   HEAT AVL.H). The actual heat relays on at any given Indoor fan is not on, the economizer will not operate. time are displayed as Actual Heating Stages (Operating ECONOMIZER FAULT DETECTION AND DIAGNOSTICS ...

  • Page 24: Title 24 Fdd Configuration Points

    The control shall log a “damper not modulating” alert if: Range=10-20 SAT has not decreased by T24SATMD degrees F Default=10 SAT_SET/2 seconds after opening the economizer at least S.CHG (T24SATMD) — “T24 Econ Move SAT Change” — T24ECSTS%, taking into account whether the entire move- minimum amount (in degrees F) SAT is expected to change ment has occurred within the range 0 to T24TSTMN%.

  • Page 25: Economizer Actuator Communication

    ECONOMIZER ACTUATOR COMMUNICATION Economizer Position % The economizer actuator used with the 48/50HC units is a Multi-Function Technology (MFT) actuator. This allows the ComfortLink system to communicate with the actuator digital- ly using Belimo MP protocol. The configuration Economizer EC.MX ...

  • Page 26: Thermostat Control

    than the configured Econo Cool Lo Temp Limit (Configura-   tion ECON EL.LO). Econo Diff DBulb Lockout (Operating OAT/RAT DF.DB (DIFFBULB) D.LOC (DFDBLOCK)   Comparison Modes ECON D.LOC) occurs when Diff Dry Bulb Control   is enabled (Configuration ECON DF.DB = Enable) and the DISABLE...

  • Page 27: Indoor Air Quality (Iaq)

    calculated outside air CFM falls below Power Exhaust Stage1 (AQ.MN) in a linear manner as shown in Fig. 8. At other fan CFM (PE1.C). The Power Exhaust Stage2 CFM (Configura- speeds the economizer damper will operate in the shaded area ...

  • Page 28: Outdoor Air Quality (Analog Input)

      the IAQ Switch Input Config (Configuration AIR.Q II.CF). IA.FN = 1 (Occupied) Enthalpy and IAQ are controlled by the same switch input and When IA.FN =1, the IAQ algorithm will turn on the indoor fan therefore cannot be used simultaneously. whenever the building is occupied and IAQ/OAQ differential II.CF = 0 (No IAQ) is greater than the Fan On AQ Differential (Configura-...

  • Page 29: Reheat Modes

     Occupied Setpoint (Setpoints RH.SP) during the occupied Operation of the revised refrigerant circuit for each mode is de- period Space Unoccupied Setpoint (Set- scribed below.  points RH.UN) during unoccupied periods. If the Space NOTE: x = refrigerant circuit A or B Humidity Sensor (SP.RH) value is above the Space RH Set- Normal Cooling point (RH.SP), then dehumidification is needed.
  • Page 30 RDV.x RLV.x COMP CLV.x OUTDOOR AIR METERING DEVICE EVAP COIL CLOSED VALVE OPEN VALVE INDOOR ENTERING ® Fig. 9 — Normal Cooling Mode — Humidi-MiZer System — 48/50HC 04-12 RDV.x LDV.x COMP OUTDOOR AIR METERING DEVICE EVAP COIL CLOSED VALVE OPEN VALVE 3-WAY VALVE INDOOR ENTERING...
  • Page 31 RDV.x RLV.x COMP CLV.x OUTDOOR AIR METERING DEVICE EVAP COIL CLOSED VALVE OPEN VALVE INDOOR ENTERING Fig. 11 — Subcooling Mode (Reheat 1) — Humidi-MiZer System — 48/50HC 04-12 RDV.x LDV.x COMP OUTDOOR AIR METERING DEVICE EVAP COIL CLOSED VALVE OPEN VALVE 3-WAY VALVE INDOOR ENTERING...
  • Page 32 RDV.x RLV.x COMP CLV.x OUTDOOR AIR METERING DEVICE EVAP COIL CLOSED VALVE OPEN VALVE INDOOR ENTERING ® Fig. 13 — Hot Gas Reheat Mode (Reheat2) — Humidi-MiZer System 48/50HC 04-12 RDV.x LDV.x COMP OUTDOOR AIR METERING DEVICE EVAP COIL CLOSED VALVE OPEN VALVE 3-WAY VALVE INDOOR ENTERING...

  • Page 33: Reheat Control

      REHEAT CONTROL Service Test COOL CMP.B (Cool B Test) A value of On will turn on circuits A and B in Normal Cooling The cooling staging and compressor control routines are re- mode. sponsible for controlling each circuit in one of the three sub- modes (Cool, Reheat1, or Reheat2).

  • Page 34: Carrier Comfort Network (Ccn) Configuration

    It is possible to configure the ComfortLink control to partici- is possible to cancel an override in progress by writing “0” to pate as an element of the Carrier Comfort Network (CCN) sys- this variable, thereby removing the override time left.

  • Page 35: Linkage

    normal running mode, these limits will prevent stages from be- The response of the control system to various alerts and alarms ing added, or stages to be removed, as applicable. In test mode, depends on the seriousness of the particular alert or alarm. In these limits are ignored, and the user may continue to operate all the mildest case, an alert does not affect the operation of the ...

  • Page 36: Communication

    When free cooling is desired and allowed the wheel is not its running status. If communication is lost the ERV will shut needed to pre-condition the air therefore an economizer damp- down and remain in the Off mode until communication is es- er (wheel bypass) is used to bring in the outside air directly to tablished.
  • Page 37 Table 12 — Configurations - ERV Configurations Read from ComfortLink Controller SCROLLING CCN POINT* MARQUEE EXPANDED TEXT RANGE UNITS DEFAULT FUNCTION POINT† 0=No OAU Defines what kind of OAU is OAU_TYPE OA.TY Outdoor Air Unit Type 1: FIOP EXv2 1=FIOP EXv2 installed 1: 04 2: 05-06...
  • Page 38 Table 13 — Status Points — ERV Writes These Points to ComfortLink Controller SCROLLING CCN POINT* EXPANDED TEXT RANGE UNITS FUNCTION MARQUEE POINT† 1=AUTO OAU_RUN OA.RN OAU System Run State 2=OFF High level ERV state 3=TEST 0=Off 1=ERV (DCV) 2=Free Cooling 3=OA Tempering OAU_MODE OA.OP...

  • Page 39: To 25 Ton Modulating Erv

    (DCV) operation. The modulating ERV will operate based on 3 to 25 Ton Modulating ERV occupancy and the rooftop’s operating mode, the following The modulating ERV is an intelligent ERV with variable speed sections explain operation in detail. Refer to Fig. 15 for the fan motors.

  • Page 40: Occupancy

    OCCUPANCY The ERV will not be allowed to run unless it is determined to IMPORTANT: Refer to the base unit Controls, Start Up, be occupied. The ERV monitors the rooftop’s occupancy point operation, and Troubleshooting manual for details on how →...

  • Page 41: Exhaust Control

    → → up or down to produce the required CFM. If at any time the CO exhaust offset setpoint (Configuration PE.OF). sensor fails or IAQ reads 0ppm, the DCV minimum outside air The exhaust offset setpoint can be set as a negative or positive requirement will be forced to the maximum value (OA.MN).

  • Page 42: Restart Procedure

      • If outdoor-air temperature is less than the Compressor (Configuration COOL MX.SA or MX.SB) in a two second Lockout Temperature (CA.LO, CB.LO) configuration val- window while running the compressor and persists for 40 sec- ue, unit ca not cool. onds.
  • Page 43 turned off internally. Cooling will not operate. This is usually must be replaced, the CS board can be disabled while securing a due to a network force on a non exposed CCN point. Reload replaced board. A CS board is disabled by setting the corre- factory defaults or reinstall software on the MBB.
  • Page 44 be necessary. Cycling power to the control and reconfiguring the Alert Code T180 — Loss of Communication with the Econo- time and date should be tried before board replacement. mizer Actuator Alarm Code A154 — Serial EEPROM Hardware Failure This alert occurs when the ECB cannot communicate with the Belimo Actuator.
  • Page 45  This alert occurs when the fan status switch has sensed that the in- INDP E.CAL) using the Service Test menu. The economizer door fan has been off for 10 seconds and the indoor fan feedback calibration procedure will try to find new maximum open and has determined that the indoor fan should be on.
  • Page 46   alert will show you one of the below alerts. All these alerts are able is set to yes (Configuration EFBE = Yes), and generated by the OAU device and reported to the MBB. These this alarm is active for 10 minutes, the fan will be commanded alerts can only occur if the Outdoor Air Unit Type (Configura- to the next highest configured fan speed.
  • Page 47 Table 14 — ComfortLink Alarm Codes (cont) ALARM ACTION TAKEN BY RESET DESCRIPTION PROBABLE CAUSE ALERT CONTROL METHOD NUMBER Circuit B Loss of Charge T111 Lockout Circuit B Manual Low refrigerant or faulty suction pressure transducer Service Test — Circuit B Loss of Charge Circuit A High Discharge Pressure An overcharged system, high outdoor ambient...
  • Page 48 Table 14 — ComfortLink Alarm Codes (cont) ALARM ACTION TAKEN BY RESET DESCRIPTION PROBABLE CAUSE ALERT CONTROL METHOD NUMBER Thermostat W2 Input Activated Run unit as if W2 and W1 are T412 Automatic Bad Thermostat or Thermostat Wiring without W1 Activated Thermostat Y and W Inputs Run unit in mode activated T413...

  • Page 49: Control Module Communication

    LEDs. When op- The MBB has one yellow LED which is used to indicate CCN erating correctly, the red status LEDs should blink in unison at communication activity. The Carrier Comfort Network (CCN) ®...

  • Page 50: Cooling Troubleshooting

    unique control configurations per installed site requirements or Cooling Troubleshooting accessories. Use the scrolling marquee display or a CCN device to view the If alarms conditions are corrected and cleared, operation of the cooling status display and the cooling diagnostic display (see compressors and fans may be verified by using the Service Test Appendix A) for information on the cooling operation.

  • Page 51: Humidi-Mizer™ Troubleshooting

    If alarm conditions are corrected and cleared, operation of the Humidi-MiZer™ Troubleshooting compressors, fans, and Humidi-MiZer valves may be verified Use the unit scrolling marquee display or a CCN device to by using the Service Test mode (see Table 6.) In addition to view the cooling status display and the cooling diagnostic dis- general cooling service analysis (see Table 16), see Table 17 play (see Appendix A) for information on the cooling opera-...

  • Page 52: Economizer Troubleshooting

    Table 17 — Humidi-MiZer Service Analysis (cont) PROBLEM CAUSE REMEDY Low Suction Pressure and High General cooling mode problem. See Cooling Service Analysis (Table 16). Discharge Pressure. Both RLV and CLV valves closed. See RLV and CLV Valve Operation, above. RDV Valve Cycling On/Off.
  • Page 53 Economizer (E.CAL) procedure. Economizer is Not at Configured Minimum Unit is operating under free cooling or a force is Economizer is operating correctly. Position applied to the commanded position. LEGEND — Carrier Comfort Network — Indoor Air Quality...

  • Page 54: Heating Troubleshooting

    GAS HEAT (48HC UNITS) Heating Troubleshooting Use the unit scrolling marquee display or a CCN device to See Table 19 for general gas heating service analysis. See Fig. 17 view the heating status display and the heating diagnostic dis- for service analysis of the IGC board logic. Check the status LED play (see Appendix A) for information on the heating opera- on the IGC board for any flashing alarm codes and correct any tion.
  • Page 55 24 VOLTS DEFECTIVE 1 FLASH - INDOOR FAN DELAY FLASHING LED is BETWEEN IGC BOARD MODIFIED (HEATING) F1 AND C 2 FLASHES - OPENING OF LIMIT SWITCH 1. BLOWN 5 AMP FUSE 3 FLASHES - FLAME SENSOR 2. DEFECTIVE 24V TRANS. INDICATES FLAME WITH 3.
  • Page 56 Table 20 — IGC Board LED Alarm Codes LED FLASH ACTION TAKEN BY DESCRIPTION RESET METHOD PROBABLE CAUSE CODE CONTROL Normal Operation — — — Loss of power to the IGC. Check 5 amp fuse on Hardware Failure No gas heating. —...

  • Page 57: Phase Loss Protection

    Table 21 — Electric Heat Service Analysis PROBLEM CAUSE REMEDY Check active alarms using ComfortLink scrolling Active alarm. marquee. Check heating configurations using the Unit is NOT configured for heat. ComfortLink scrolling marquee Check power supply, fuses, wiring, and circuit No power to unit.

  • Page 58: Refrigerant Temperatures

    THERMISTOR/TEMPERATURE SENSOR CHECK A high quality digital volt-ohmmeter is required to perform this check. Connect the digital voltmeter across the appropriate thermistor terminals at the J8 terminal strip on the Main Base Board (see Major System Components on p. 68). Using the voltage reading obtained, read the sensor tempera- ture from Tables 22 and 23.
  • Page 59 SCT.A SCT.A SCT.A 48/50HC 04 SIZE 48/50HC 05, 06 SIZES 48/50HC 07 SIZE Fig. 19 — Saturated Condensing Temperature Thermistor Location — 48/50HC 04-07...
  • Page 60 SCT. A SCT. B SCT. B SCT. B SCT. A SCT. A SCT. A 48/50HC 08, 09 SIZES 48/50HC 11 SIZE 48/50HC 12 SIZE Fig. 20 — Saturated Condensing Temperature Thermistor Location — 48/50HC 08-12...
  • Page 61 SCT. B SCT. A CIRCUIT “B” CIRCUIT “A” Fig. 21 — Saturated Condensing Temperature Thermistor Location — 48/50HC 14...
  • Page 62 SCT.A SCT.B Fig. 22 — Saturated Condensing Temperature Thermistor Location — 48/50HC 17-20 SCT.A SCT.B Fig. 23 — Saturated Condensing Temperature Thermistor Location — 48/50HC 24-28...

  • Page 63: Transducer Troubleshooting

    Transducer Troubleshooting Forcing Inputs and Outputs The electronic control uses suction pressure transducers to Many variables may have their value forced through CCN or measure the suction pressure of the refrigerant circuits. The directly at the local display. This can be useful during diagnos- pressure/voltage characteristics of these transducers are in tic testing and also during operation, typically as part of an ad- shown in Table 24, the 5vdc power is applied to legs A and B...
  • Page 64 Table 22 — Temperature (°F) vs Resistance/Voltage Drop Values for OAT, SAT, and SPT Thermistors (10K at 25°C Type II Resistors) RESISTANCE VOLTAGE RESISTANCE VOLTAGE RESISTANCE VOLTAGE TEMP (F) TEMP (F) TEMP (F) (Ohms) DROP (V) (Ohms) DROP (V) (Ohms) DROP (V) –25 196,453...
  • Page 65 Table 23 — Temperature (°F) vs. Resistance/Voltage Drop Values for SCT Sensors (5K at 25°C Resistors) RESISTANCE VOLTAGE DROP RESISTANCE VOLTAGE DROP RESISTANCE VOLTAGE DROP TEMP (F) TEMP (F) TEMP (F) (Ohms) (Ohms) (Ohms) –25 3.699 98,010 1.982 7,866 1,190 0.511 –24 3.689...

  • Page 66: Troubleshooting Units Equipped With Energyx

    Table 24 — Pressure (psig) vs Voltage Drop Values for Suction Pressure Transducers PRESSURE VOLTAGE PRESSURE VOLTAGE PRESSURE VOLTAGE PRESSURE VOLTAGE (psig) DROP (V) (psig) DROP (V) (psig) DROP (V) (psig) DROP (V) 0.465 1.135 1.804 2.474 0.485 1.154 1.824 2.493 0.505 1.174...

  • Page 67: T418 Oau Low Cfm

    determine which one is having the problem. In test mode run Table 25 — EXCB LED Indicators the components individually to determine which is causing the problem. If the Shut Down on fan failure configuration is set to STATUS IF LIGHT →...

  • Page 68: Communication Failures

    into the EXCB board to J24 and J25 respectively. They have Communication Failures three pins: IN, GND, and OUT. The IN pin is 5vdc input power Communication is critical for ERV operation. It can fail on two and GND is the common or ground pin. The OUT pin will be different paths;...
  • Page 69 Fig. 24 — Typical Control Diagram for 48HC 04-14 Units (48HC 08-09 shown)
  • Page 70 Fig. 25 — Typical Power Diagram for 48HC 04-14 Units (48HC 08-09 shown)
  • Page 71 Fig. 26 — Typical Control Diagram for 50HC 04-14 Units (50HC 14 shown)
  • Page 72 Fig. 27 — Typical Power Diagram for 50HC 04-14 Units (50HC 14 Non-Humidi-MiZer shown)
  • Page 73 Fig. 28 — Typical Control Diagram 48HC 17-28 Units...
  • Page 74 Fig. 29 — Typical Control Diagram 50HC 17-28 Units...
  • Page 75 Fig. 30 — Typical Humid-MiZer Power Diagram and Component Arrangement 48/50HC 17-28 Units...
  • Page 76 Fig. 31 — Typical Non-Humid-MiZer Power Diagram and Component Arrangement 48/50HC 17-28 Units...

  • Page 77: Main Base Board (Mbb)

    The MBB also receives the Current Sensor inputs RED LED - STATUS GREEN LED - YELLOW LED - LEN (LOCAL EQUIPMENT NETWORK) CCN (CARRIER COMFORT NETWORK) INSTANCE JUMPER (SET TO 1) CEPL130346-01 STATUS C07026 Fig. 32 — Main Base Board (MBB)
  • Page 78 J10, 25 HT.2 Heat Stage 1 relay relay J10, 27 COMMUNICATION Local Equipment Network (LEN) communication J5, 1-3 Carrier Comfort Network (CCN) communication J5, 5-7 Network device power 24 VAC J5, 9-10 Scrolling Marquee Display (LEN) communication J4, 1-3 Scrolling Marquee Display power...

  • Page 79: Economizer Control Board (Ecb)

    Power exhaust 2 relay relay J8, 6 EC.CP Commanded Economizer position 0-20 mA J9, 1 COMMUNICATION Local Equipment Network (LEN) communication J2, 1-3 Carrier Comfort Network (CCN) communication Economizer actuator position (digital EC.CP & EC.AP MFT communication J7, 1 control)

  • Page 80: Integrated Gas Control (Igc) Board

    the rollout switch, limit switch, and induced-draft motor Hall Ef- Integrated Gas Control (IGC) Board fect switch. The IGC is provided on gas heat units. (See Fig. 34 and Table 31.) The IGC controls the direct spark ignition system and monitors RED LED-STATUS Fig.

  • Page 81: 48/50Hc 04-14 Units - Low Voltage Terminal Board

    the back has spade connectors. This board provides connection 48/50HC 04-14 Units — Low Voltage Terminal for the thermostat, space sensor, and most field installed acces- Board (TB) sories. See Table 32. The field connection terminal board has 30 terminals oriented in 3 rows of 10 terminals.

  • Page 82: 48/50Hc 17-28 Units - Low Voltage Terminal Boards

    This circuit board provides a field connection point for unit communications. The Local Equipment Network (LEN) RJ-11 connector allows a hand-held Navigator to be plugged in to ac- cess the unit’s menus. The Carrier Comfort Network ® (CCN) RJ-11 connector or the CCN screw terminals allow building communication connections.

  • Page 83: Scrolling Marquee Display

    Table 34 — Central Terminal Board (CTB) Connections CONNECTION LABEL PIN NUMBER POINT DESCRIPTION 24Vac FROM 24Vac TO Compressor 1 Call ECON Compressor 2 Call ECON DDC T-STAT Heat Stage 1 Call CONTL BOARD Heat Stage 2 Call CONTL BOARD Comp 1 Call jumper DDC T’STAT CLO1/COMP1...

  • Page 84: Carrier Comfort Network® (Ccn) Interface

    COM terminal, and the black wire to the (–) terminal. The RJ14 CCN connector on CIB can also be used, but is only intended for temporary connection (for example, a laptop computer running Carrier network software). Restore power to unit. IMPORTANT: A shorted CCN bus cable will prevent some routines from running and may prevent the unit from starting.
  • Page 85 HVAC EQUIPMENT COMFORT AIR DISTRIBUTION-DIGITAL AIR VOLUME CONTROL (DAV) CONTROLLER LEGEND ® — Carrier Comfort Network — ComfortLink Controls — Digital Air Volume HVAC — Heating, Ventilation, and Air Conditioning — Terminal Control Unit Fig. 39 — CCN System Architecture...

  • Page 86: Condensate Overflow Switch (Cofs)

    If the use of one T-56 sensor is required, refer to Fig. 41. open (1) or normally closed (2). Normally open (1) is the pre- ferred configuration. CARRIER ACCESSORY KITS Fan status wires are pre-run in the unit harness and located near There are specific accessory kits sold for various field installed the switch installation location.
  • Page 87 TB1-T55 TO MAIN BASE BOARD SENSOR 1 SENSOR 2 SENSOR 3 SENSOR 4 SPACE TEMPERATURE AVERAGING — 4 T-55 SENSOR APPLICATION TB1-T55 TO MAIN BASE BOARD SENSOR 1 SENSOR 2 SENSOR 3 LEGEND — Terminal Block ______ Factory Wiring _ _ _ _ Field Wiring SENSOR 4 SENSOR 5...

  • Page 88: Enthalpy Sensors

    UNIT SAT.H to ENBL. A SAT sensor in the supply duct is the preferred configuration for systems with Carrier EnergyX units consist of a factory-installed energy recovery variable volume and temperature (VVT) accessory controls. ventilator (ERV) device on a 48/50HC rooftop unit. The Ener-...
  • Page 89 Fig. 42 — Modulating ERV Wiring Schematic...
  • Page 90 ® Fig. 43 — EnergyX ERV Control Box Component Layouts...

  • Page 91: Energyx Control Board (Excb)

    ENERGYX CONTROL BOARD (EXCB) EXCB has relay analog outputs, and is equipped with a LCD screen. The EXCB communicates with a Modbus protocol and is See Fig. 44 and Table 35. not a CCN device. The EXCB has a reset button that is used to The EXCB continuously monitors input/output channel informa- force all the outputs and reset communication.

  • Page 92: Universal Protocol Converter (Upc)

    LCD Texts Universal Protocol Converter (UPC) Initialize_LEN Communication See Fig. 45 and Table 36. This will occur when the ERV is turned on from a power reset. The UPC board is required to convert CCN into Modbus proto- col. It contains the operating software that runs the ERV logi- Communication Connected cally.

  • Page 93: Enthalpy Wheel

    ENTHALPY WHEEL changed. Refer to the troubleshooting section for details on the alarms. The enthalpy wheel is the “heat exchangers” of the ERV. It consists of several wheel segments aligned in a cassette assem- FILTER MAINTENANCE (FIELD-INSTALLED ONLY) bly. These are not “filters” but made of a desiccant material. Filter maintenance consists of two field-installed pressure sen- The wheel is rotated by a motor and belt, no adjustments re- sor devices which sense differential pressure across the ERV...

  • Page 94: Outdoor-Air Inlet Screens

    Allow excess water to drain prior to replacing segments in Wheel and Segment Removal / Installation the wheel. A small amount of water remaining in the The wheel and segments represent a substantial portion of the wheel will be dried out by the airflow. value of the cassette therefore must be handled with care and never be dropped.

  • Page 95: Whole Wheel Removal / Installation

    Position one segment opening at the top of the cassette. Ease the segment downward until its outer rim clears the Unlock and open the segment retaining brackets on both inside of the wheel rim. Press the segment inward against sides of the selected segment opening. See Fig. 48. the spoke flanges.

  • Page 96: Outside Air And Exhaust Air Hood Removal

    When replacing wheel be certain to tighten four bearing Outside Air and Exhaust Air Hood Removal set screws. Premature bearing failure can occur if not set OUTSIDE AIR HOOD REMOVAL tightly. Turn off, lockout and tag-out electrical power to unit. Remove the hood by removing the self-sealing screws along the perimeter of the hood.

  • Page 97: Outside Air Motorized Damper Removal

    Fig. 54 — Exhaust Air Hood Removal length of the flanges connecting them to the inside of the Outside Air Motorized Damper Removal ERV unit. Turn off, lockout and tag-out electrical power to unit. Disconnect the connector PL121, PL123 and the power Remove the outside air motorized damper access panel by wires for the exhaust fan motor from the wiring harness removing the self-sealing screws around the perimeter (see...
  • Page 98 Motorized Outside Air Damper Outside Air Damper Access Panel Fig. 55 — Outside Air Motorized Damper Removal Detail “A” - Outside Air Fan Assembly Remove Fasteners: 4 - Places Remove Bolts: 4 - Places Outside Air Fan Assembly, see Detail A (access panel not shown) Fig.

  • Page 99: Exhaust Fan Removal

    Fig. 57 — Outside Air Fan Removal EXHAUST FAN REMOVAL If installed, remove the exhaust motorized damper. Remove the fasteners around the perimeter of the exhaust Turn off, lockout and tag-out electrical power to unit. fan that secure the exhaust fan front panel to the dividing Remove the exhaust fan access panel by removing the wall by access through the door of the unit.
  • Page 100 Detail “A” - Exhaust Fan Assembly secured to Dividing Wall Remove Fasteners: 8 - Places Fig. 58 — Exhaust Fan Assembly - Fastener Locations...
  • Page 101 Exhaust Fan Assembly Fig. 59 — Exhaust Fan Assembly - Removal...

  • Page 102: Tables

    APPENDIX A — LOCAL DISPLAY AND CCN TABLES Table A — Mode — Run Status CCN TABLE/ ITEM EXPANSION RANGE UNITS CCN POINT WRITE SUB-TABLE STATUS RUN STATUS STATUS DISPLAY VIEW Auto View of Run Status (VIEW = Display only) 1=Disabled 2=Ventilation HVAC...

  • Page 103: Appendix A - Local Display And Ccn

    APPENDIX A — LOCAL DISPLAY AND CCN TABLES (cont) Table A — Mode — Run Status (cont) CCN TABLE/ ITEM EXPANSION RANGE UNITS CCN POINT WRITE SUB-TABLE STATUS SSP.B Suction Pressure B xxx.x psig SSP_B SCT.B Sat. Condenser Temp B xxx.x °F SCT_B...
  • Page 104 APPENDIX A — LOCAL DISPLAY AND CCN TABLES (cont) Table A — Mode — Run Status (cont) CCN TABLE/ ITEM EXPANSION RANGE UNITS CCN POINT WRITE SUB-TABLE STATUS Outside Air Unit Status OAUDISP 1=AUTO OA.RN OAU System Run State 2=OFF OAU_RUN 3=TEST 0=Off...
  • Page 105 APPENDIX A — LOCAL DISPLAY AND CCN TABLES (cont) Table A — Mode — Run Status (cont) CCN TABLE/ ITEM EXPANSION RANGE UNITS CCN POINT WRITE SUB-TABLE STATUS (ALRMDISP) = CCN ALRMDISP only) Active Alarm 1 Code ALMCODE1 Active Alarm 2 Code ALMCODE2 Active Alarm 3 Code ALMCODE3...
  • Page 106 APPENDIX A — LOCAL DISPLAY AND CCN TABLES (cont) Table B — Mode — Service Test CCN TABLE/ ITEM EXPANSION RANGE UNITS CCN POINT SUB-TABLE SERVICE TEST TEST Field Service Test Mode Off/On (TEST = display only) INDP Test Independent Outputs TESTINDP ECON Economizer Position Test...
  • Page 107 APPENDIX A — LOCAL DISPLAY AND CCN TABLES (cont) Table D — Mode — Pressures DISPLAY CCN TABLE/ CCN POINT CCN WRITE ITEM EXPANSION RANGE UNITS WRITE SUB-TABLE STATUS STATUS PRESSURES STATUS DISPLAY SSP.A Suction Pressure A xxx.x psig UINPUT SSP_A SCP.A Condenser Pressure A...
  • Page 108 APPENDIX A — LOCAL DISPLAY AND CCN TABLES (cont) Table G — Mode — Set Points ITEM EXPANSION RANGE UNITS DEFAULT CCN TABLE/SUB-TABLE CCN POINT SETPOINT CONFIGURATION SETPOINTS SET_PNT OCSP Occupied Cool Setpoint 55 to 80 °F OCSP UCSP Unoccupied Cool Setpoint 65 to 95 °F UCSP...
  • Page 109 APPENDIX A — LOCAL DISPLAY AND CCN TABLES (cont) Table H — Mode — Configuration (cont) CCN TABLE/ PAGE ITEM EXPANSION RANGE UNITS DEFAULT CCN POINT SUB-TABLE FS.E1 Fan Speed - Free Cool Lo 0 to 100 FSPDECO1 FS.CL Fan Speed - Mech Cooling 60 to 100 FSPDCOOL FS.RH...
  • Page 110 APPENDIX A — LOCAL DISPLAY AND CCN TABLES (cont) Table H — Mode — Configuration (cont) CCN TABLE/ PAGE ITEM EXPANSION RANGE UNITS DEFAULT CCN POINT SUB-TABLE CK.DL Delay On Low SST Check 0 to 300 SSTCKDLY HUMIDIMIZER HMZR HMZR_CFG CONFIGURATION REHT Humidimizer Equipped...
  • Page 111 APPENDIX A — LOCAL DISPLAY AND CCN TABLES (cont) Table H — Mode — Configuration (cont) CCN TABLE/ PAGE ITEM EXPANSION RANGE UNITS DEFAULT CCN POINT SUB-TABLE EH.LO Econo Cool Hi Temp Limit 40 to 100 °F OATLECLH 23 EL.LO Econo Cool Lo Temp Limit -30 to 50 °F...
  • Page 112 APPENDIX A — LOCAL DISPLAY AND CCN TABLES (cont) Table H — Mode — Configuration (cont) CCN TABLE/ PAGE ITEM EXPANSION RANGE UNITS DEFAULT CCN POINT SUB-TABLE O.20M OAQ Sensor Value at 20mA 0 to 5000 2000 OAQ_20MA H.4M RH Sensor Value at 4mA 0 to 50 RH_4MA H.20M...
  • Page 113 APPENDIX A — LOCAL DISPLAY AND CCN TABLES (cont) Table H — Mode — Configuration (cont) CCN TABLE/ PAGE ITEM EXPANSION RANGE UNITS DEFAULT CCN POINT SUB-TABLE A.OAU Outside Air unit Alarms No/Yes OAU_AL PID Configurations PID_CFG EC.P Economizer PID - kP 0.00 to 99.90 ECONO_P EC.I...
  • Page 114 APPENDIX A — LOCAL DISPLAY AND CCN TABLES (cont) Table H — Mode — Configuration (cont) CCN TABLE/ PAGE ITEM EXPANSION RANGE UNITS DEFAULT CCN POINT SUB-TABLE OV.TL Override Time Limit 0 to 4 hours OV.EX Timed Override Hours 0 to 4 hours OVR_EXT OV.SP...
  • Page 115 APPENDIX A — LOCAL DISPLAY AND CCN TABLES (cont) Table I — Mode — Time Clock (cont) ITEM EXPANSION RANGE UNITS DEFAULT CCN TABLE/Sub-TABLE CCN POINT HOL.L Holiday Schedule HOLIDAY HOL.x Holiday x HOLDYxxS 1 to 12 = January MON.x Holiday Start Month HOLMONxx to December...
  • Page 116 APPENDIX A — LOCAL DISPLAY AND CCN TABLES (cont) Table K — Mode — Operating Modes (cont) DISPLAY CCN TABLE/Sub- CCN WRITE ITEM EXPANSION RANGE UNITS CCN POINT WRITE TABLE STATUS STATUS COOL Cool Mode Diagnostic COOLDIAG COOL In Cooling Mode? No/Yes IN_COOL OK.CL...
  • Page 117 APPENDIX A — LOCAL DISPLAY AND CCN TABLES (cont) Table K — Mode — Operating Modes (cont) DISPLAY CCN TABLE/Sub- CCN WRITE ITEM EXPANSION RANGE UNITS CCN POINT WRITE TABLE STATUS STATUS OK.HT OK to Select Heat Mode? No/Yes OKTOHEAT MS.TG Mode Select Timeguard secs...
  • Page 118 APPENDIX A — LOCAL DISPLAY AND CCN TABLES (cont) Table K — Mode — Operating Modes (cont) DISPLAY CCN TABLE/Sub- CCN WRITE ITEM EXPANSION RANGE UNITS CCN POINT WRITE TABLE STATUS STATUS Outside Air Unit Diagnostic OAU_DIAG 1=AUTO OA.RN OAU System Run State 2=OFF OAU_RUN 3=TEST...
  • Page 119 APPENDIX A — LOCAL DISPLAY AND CCN TABLES (cont) Table K — Mode — Operating Modes (cont) DISPLAY CCN TABLE/Sub- CCN WRITE ITEM EXPANSION RANGE UNITS CCN POINT WRITE TABLE STATUS STATUS (LINKDATA = CCN - Linkage LINKDATA CCN only) Supervisory Element # SUPE-ADR Supervisory Bus...

  • Page 120: Appendic B - Control Modes With Humidi-Mizer System And Economizer

    APPENDIX B — CONTROL MODES WITH HUMIDI-MIZER SYSTEM AND ECONOMIZER Thermostat input shown for cooling demand (versus tempera- Circuit HGRH mode = hot gas reheat = REHEAT 2 ture sensor and set point). Humidistat input shown for dehu- Circuit ON mode = normal cooling midification demand (versus relative humidity sensor and set Thermostat Control type configuration = 0 = Adaptive, or Unit point).

  • Page 121: Appendic C - Variable Frequency Drive

    Failure to follow this caution may result in damage to the unit in degradation of unit performance. Do not run the Carrier Assistant through the VFD keypad. This will cause parameters to change value that are not de- sired on these applications.
  • Page 122 The VFD motor parameters shown in Table U should never be changed in the field unless authorized by Carrier Corporation. Damage could occur to the motor or unit if these are set to any- thing besides what is shown in the table. These are only pro- vided for drive or motor replacement or future adjustments Table Q —...
  • Page 123 APPENDIX C — VARIABLE FREQUENCY DRIVE (VFD) (cont) Table T — VFD Standard Parameters Through ComfortLink Controls PARAMETER GROUP PARAMETER TITLE ABB PARAMETER UNITS CCN POINT DISPLAY MENU ITEM FB STS WORD 1 VFD1STAT SPEED (%) VFD1_SPD SPEED 0102 VFD1RPM OUTPUT FREQ 0103 VFD1FREQ...
  • Page 124 APPENDIX C — VARIABLE FREQUENCY DRIVE (VFD) (cont) Table U — VFD Motor Default Configurations (cont) COMFORTLINK CCN POINT (DISPLAY MENU ITEM) UNIT UNIT STATIC UNIT SIZE VOLTAGE OPTION VFD1NVLT VFD1NAMP VFD1NFRQ VFD1NRPM VFD1NPWR VFD1MAXA (Digits 7 & 8) (Digit 12) (Digit 10) (N.VLT) (N.AMP)
  • Page 125 APPENDIX C — VARIABLE FREQUENCY DRIVE (VFD) (cont) Table U — VFD Motor Default Configurations (cont) COMFORTLINK CCN POINT (DISPLAY MENU ITEM) UNIT UNIT STATIC UNIT SIZE VOLTAGE OPTION VFD1NVLT VFD1NAMP VFD1NFRQ VFD1NRPM VFD1NPWR VFD1MAXA (Digits 7 & 8) (Digit 12) (Digit 10) (N.VLT) (N.AMP)
  • Page 126 FUNCTION through 3015 UNDERLOAD CURVE. Internal fault. The thermistor measuring the internal temperature of the drive is open or shorted. Contact THERM FAIL Carrier. Internal fault. A communication-related problem has been detected between the OMIO and OINT OPEX LINK boards. Contact Carrier.
  • Page 127 Table V — Fault Codes (cont) FAULT CODE FAULT NAME IN PANEL DESCRIPTION AND RECOMMENDED CORRECTIVE ACTION OPEX PWR Internal fault. Low voltage condition detected on the OINT board. Contact Carrier. CURR MEAS Internal fault. Current measurement is out of range. Contact Carrier. SUPPLY PHASE Ripple voltage in the DC link is too high.
  • Page 128 APPENDIX C — VARIABLE FREQUENCY DRIVE (VFD) (cont) Table W — Alarm Codes ALARM CODE ALARM NAME IN PANEL DESCRIPTION AND RECOMMENDED CORRECTIVE ACTION 2001 — Reserved 2002 — Reserved 2003 — Reserved The change in direction being attempted is not allowed. Do not attempt to change the direction of motor 2004 DIR LOCK rotation, or Change parameter 1003 DIRECTION to allow direction change (if reverse operation is safe).
  • Page 129 APPENDIX C — VARIABLE FREQUENCY DRIVE (VFD) (cont) CONTROL SET POINT AND CONFIGURATION LOG MODEL NO.: _____________________________________ SOFTWARE VERSIONS SERIAL NO.: _____________________________________ MBB: CESR131504-_ _ DATE: ___________________________________________ ECB: CESR131249-_ _ TECHNICIAN: ____________________________________ MARQ: CESR131171-_ _ INDICATE UNIT SETTINGS BELOW CONTROL TYPE: Thermostat/T55 Space Temp./T-56 Space Temp./T-58 Space Temp.
  • Page 130 APPENDIX C — VARIABLE FREQUENCY DRIVE (VFD) (cont) Table X — Mode — Configuration (cont) CCN TABLE/ ITEM EXPANSION RANGE UNITS DEFAULT CCN POINT ENTRY Sub- TABLE S.VFD SUPPLY FAN VFD CONFIG 230: 208/230v 1ph or 3ph N.VLT VFD1 Nominal Motor Volts 0 to 999 volts VFD1NVLT...
  • Page 131 APPENDIX C — VARIABLE FREQUENCY DRIVE (VFD) (cont) Table X — Mode — Configuration (cont) CCN TABLE/ ITEM EXPANSION RANGE UNITS DEFAULT CCN POINT ENTRY Sub- TABLE HMZR Humidimizer Config HMZR_CFG REHT Humidimizer Equipped No/Yes Yes: Humidi- REHEAT MiZer FIOP R.DEC Reheat2 Stage Decr.
  • Page 132 APPENDIX C — VARIABLE FREQUENCY DRIVE (VFD) (cont) Table X — Mode — Configuration (cont) CCN TABLE/ ITEM EXPANSION RANGE UNITS DEFAULT CCN POINT ENTRY Sub- TABLE ECON Economizer Configuration ECON_CFG 0=Disable 1=RAT - 0°F DF.DB Diff Dry Bulb Control 2=RAT - 2°F 0=Disable DIFFBULB...
  • Page 133 APPENDIX C — VARIABLE FREQUENCY DRIVE (VFD) (cont) Table X — Mode — Configuration (cont) CCN TABLE/ ITEM EXPANSION RANGE UNITS DEFAULT CCN POINT ENTRY Sub- TABLE AIR.Q (cont) Air Quality Config. IAQ_CFG H.4M RH Sensor Value at 4mA 0 to 50 RH_4MA H.20M RH Sensor Value at 20mA...
  • Page 134 APPENDIX C — VARIABLE FREQUENCY DRIVE (VFD) (cont) Table X — Mode — Configuration (cont) CCN TABLE/ ITEM EXPANSION RANGE UNITS DEFAULT CCN POINT ENTRY Sub- TABLE ALM.O (cont) ALARM RELAY CONFIG. ALM_CFG A.OAU Outside Air unit Alarms No/Yes OAU_AL PID Configurations PID_CFG EC.P...
  • Page 135 APPENDIX C — VARIABLE FREQUENCY DRIVE (VFD) (cont) Table X — Mode — Configuration (cont) CCN TABLE/ ITEM EXPANSION RANGE UNITS DEFAULT CCN POINT ENTRY Sub- TABLE SCH.O CCN Schedule Overrides SCHEDOVR 0 = Always Occupied 1-64 = Local SCH.N Schedule Number SCHEDNUM Schedule...

  • Page 136: Appendic D - Energyx

    NOTE: If application designs require two separate ducts (one for The exhaust fan in the Modulated Volume EnergyX unit will exhaust air, one for return air) contact your Carrier Sales Engineer assist the rooftop unit fan in pulling air through the exhaust/re- for additional guidance prior to specification or ordering.
  • Page 137 ® APPENDIX D — ENERGYX EXHAUST FAN PERFORMANCE (cont) 2000 ECONOMIZER MODE ERV MODE 1800 1600 1400 1200 1000 0.00 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 External Static Pressure (in H Fig. C — 4 and 5 Ton SRT Unit ERV Supply and Exhaust Fan Performance Curves...
  • Page 138 ® APPENDIX D — ENERGYX EXHAUST FAN PERFORMANCE (cont) 2200 ECONOMIZER MODE ERV MODE 2000 1800 1600 1400 1200 1000 0.00 0.50 1.00 1.50 2.00 2.50 3.00 External Static Pressure (in H Fig. D — 6 Ton SRT Unit ERV Supply and Exhaust Fan Performance Curves 3500 ECONOMIZER MODE ERV MODE...
  • Page 139 ® APPENDIX D — ENERGYX EXHAUST FAN PERFORMANCE (cont) 5000 ECONOMIZER MODE 4500 ERV MODE 4000 3500 3000 2500 2000 1500 1000 0.00 0.50 1.00 1.50 2.00 2.50 3.00 3.50 4.00 4.50 5.00 Fig. F — 12.5 Ton SRT Unit ERV Supply and Exhaust Fan Performance Curves 9000 ECONOMIZER MODE ERV MODE...
  • Page 140 ® APPENDIX D — ENERGYX EXHAUST FAN PERFORMANCE (cont) 10000 ECONOMIZER MODE 9000 ERV MODE 8000 7000 6000 5000 4000 3000 2000 1000 0.00 0.50 1.00 1.50 2.00 2.50 3.00 3.50 4.00 4.50 5.00 Fig. H — 20 and 25 Ton Unit ERV Supply Exhaust Fan Performance Curves...
  • Page 142 © Carrier Corporation 2019 Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. Catalog No. 0453480236-01 Printed in U.S.A. Form 48/50HC-05T Pg 142 7-19 Replaces: 48/50HC-04T...

  • Page 143: Energyx® Unit Start-Up Checklist

    ENERGYX® UNIT START-UP CHECKLIST (To be used in conjunction with base Rooftop Unit Start-Up Checklist. Remove and Store in Job File) NOTE: To avoid injury to personnel and damage to equipment or prop- erty when completing the procedures listed in this start-up checklist, use good judgment, follow safe practices, and adhere to the safety considerations/information as outlined in preceding sections of this Controls, Start-Up, Operation, Service and Troubleshooting document.
  • Page 144 BUILDING PRESSURE SETPOINT (BP.SP) _____________ FROST PROTECTION DIAL SETPOINT _____________ © Carrier Corporation 2018 Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. Catalog No. 0453480236-01 Printed in U.S.A.

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