Carrier WeatherMaker 48A2020 Controls, Start-Up, Operation, Service And Troubleshooting Instructions
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Carrier WeatherMaker 48A2020 Controls, Start-Up, Operation, Service And Troubleshooting Instructions

Single package large rooftop units with comfortlink version 10.x controls
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Controls, Start-Up, Operation,
Service and Troubleshooting
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . 2
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Conventions Used in This Manual . . . . . . . . . . . . . . . 3
BASIC CONTROL USAGE . . . . . . . . . . . . . . . . . . . . . 4
ComfortLink Controls . . . . . . . . . . . . . . . . . . . . . . . . . 4
Scrolling Marquee . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Accessory Navigator™ Display . . . . . . . . . . . . . . . . . 4
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
CCN Tables and Display . . . . . . . . . . . . . . . . . . . . . . . 5
START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Unit Preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Unit Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Internal Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Accessory Installation . . . . . . . . . . . . . . . . . . . . . . . . 7
Crankcase Heaters . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Evaporator Fan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Gas Heat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
CONTROLS QUICK START . . . . . . . . . . . . . . . . . . . 21
Temperature Sensor . . . . . . . . . . . . . . . . . . . . . . . 21
Mechanical Thermostat . . . . . . . . . . . . . . . . . . . . 21
Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Economizer Options . . . . . . . . . . . . . . . . . . . . . . . . . 22
Indoor Air Quality (IAQ) Options . . . . . . . . . . . . . . . 22
Exhaust Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Programming Operating Schedules . . . . . . . . . . . . 22
SERVICE TEST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Service Test Mode Logic . . . . . . . . . . . . . . . . . . . . . 24
Independent Outputs . . . . . . . . . . . . . . . . . . . . . . . . 24
Fans in Service Test Mode . . . . . . . . . . . . . . . . . . . . 24
Cooling in Service Test Mode . . . . . . . . . . . . . . . . . 24
Heating in Service Test Mode . . . . . . . . . . . . . . . . . 24
Humidi-MiZer® System . . . . . . . . . . . . . . . . . . . . . . . 24
THIRD PARTY CONTROL . . . . . . . . . . . . . . . . . . . . . 25
Thermostat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Alarm Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Remote Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
VFD Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Supply Air Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Demand Limit Control . . . . . . . . . . . . . . . . . . . . . . . . 26
CONTROLS OPERATION . . . . . . . . . . . . . . . . . . . . . 27
Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Unit Configuration Submenu . . . . . . . . . . . . . . . . . . 31
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Catalog No. 04-53480239-01
Printed in U.S.A.
Single Package Large Rooftop Units
with ComfortLink Version 10.x Controls
Cooling Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33
Heating Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50
Static Pressure Control . . . . . . . . . . . . . . . . . . . . . . .56
Fan Status Monitoring . . . . . . . . . . . . . . . . . . . . . . . .60
Dirty Filter Switch . . . . . . . . . . . . . . . . . . . . . . . . . . .60
Economizer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .60
Building Pressure Control . . . . . . . . . . . . . . . . . . . .66
Smoke Control Modes . . . . . . . . . . . . . . . . . . . . . . . .68
Indoor Air Quality Control . . . . . . . . . . . . . . . . . . . . .69
Dehumidification and Reheat . . . . . . . . . . . . . . . . . .73
Temperature Compensated Start . . . . . . . . . . . . . . .76
Alert Limit Configuration . . . . . . . . . . . . . . . . . . . . . .78
Sensor Trim Configuration . . . . . . . . . . . . . . . . . . . .79
Discrete Switch Logic Configuration . . . . . . . . . . . .79
Display Configuration . . . . . . . . . . . . . . . . . . . . . . . .80
Remote Control Switch Input . . . . . . . . . . . . . . . . . .80
Hot Gas Bypass . . . . . . . . . . . . . . . . . . . . . . . . . . . . .81
Space Temperature Offset . . . . . . . . . . . . . . . . . . . .81
TIME CLOCK CONFIGURATION . . . . . . . . . . . . . . . .82
Hour and Minute (HH.MM) . . . . . . . . . . . . . . . . . . . . .82
Month of Year (MNTH) . . . . . . . . . . . . . . . . . . . . . . . .82
Day of Month (DOM) . . . . . . . . . . . . . . . . . . . . . . . . .82
Day of Week (DAY) . . . . . . . . . . . . . . . . . . . . . . . . . . .82
Year (YEAR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .82
Local Time Schedule (SCH.L) . . . . . . . . . . . . . . . . . .82
Local Holiday Schedules (HOL.L) . . . . . . . . . . . . . .83
Daylight Savings Time (DAY.S) . . . . . . . . . . . . . . . .83
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . .83
Complete Unit Stoppage . . . . . . . . . . . . . . . . . . . . . .83
Single Circuit Stoppage . . . . . . . . . . . . . . . . . . . . . .83
Service Analysis . . . . . . . . . . . . . . . . . . . . . . . . . . . .83
Restart Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . .83
Humidi-MiZer Troubleshooting . . . . . . . . . . . . . . . . .84
Thermistor Troubleshooting . . . . . . . . . . . . . . . . . . .84
Transducer Troubleshooting . . . . . . . . . . . . . . . . . .84
Forcing Inputs and Outputs . . . . . . . . . . . . . . . . . . .98
Run Status Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . .98
Alarms and Alerts . . . . . . . . . . . . . . . . . . . . . . . . . .101
MAJOR SYSTEM COMPONENTS . . . . . . . . . . . . . .110
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .110
Factory-Installed Components . . . . . . . . . . . . . . . .111
Accessory Control Components . . . . . . . . . . . . . .134
SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .137
Service Access . . . . . . . . . . . . . . . . . . . . . . . . . . . .137
Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .137
Pg 1
WeatherMaker
48/50A020-060
5-19
Replaces: 48/50A-13T
®

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Summary of Contents for Carrier WeatherMaker 48A2020

  • Page 1: Table Of Contents

    Internal Wiring ....... 7 Carrier Comfort Network (CCN) System ..77 Accessory Installation .

  • Page 2: Safety Considerations

    Lubrication ....... . 139 Evaporator Fan Performance Adjustment ..139 WARNING Evaporator Fan Coupling Assembly .

  • Page 3: General

    Access can also be done through the Carrier Comfort Network ® (CCN) system using the AVERTISSEMENT ComfortVIEW™ software, the accessory Navigator™ hand- RISQUE D´INCENDIE OU D´EXPLOSION held display, or the System Pilot™ interface. Si les consignes de sécurité ne sont pas suivies à la lettre, cela peut entraîner la mort, de graves blessures ou des dom-...

  • Page 4: Basic Control Usage

    Time Clock Operating Modes The ComfortLink control system is fully communicating and ca- Alarms ble-ready for connection to the Carrier Comfort Network ® (CCN) building management system. The control provides high- Fig. 1 — Scrolling Marquee speed communications for remote monitoring via the Internet.

  • Page 5: Operation

    Changing item values or testing outputs is accomplished in the same manner. Locate and display the desired item. If the dis- play is in rotating auto-view, press the key to stop the ENTER display at the desired item. Press the key again so ENTER that the item value flashes.
  • Page 6 Table 2 — Scrolling Marquee/Navigator Menu Display Structure (ComfortLink Display Modes) SERVICE TIME OPERATING TEMPERATURES PRESSURES SETPOINTS INPUTS OUTPUTS CONFIGURATION ALARMS STATUS TEST CLOCK MODES Auto View of Service Test Mode Air Pressures Occupied Heat General Inputs Fans Unit Time of Day System Currently Run Status...

  • Page 7: Start-Up

    START-UP Controls Use the following steps for the controls: IMPORTANT: Do not attempt to start unit, even momentarily, until all items on the Start-Up Checklist IMPORTANT: The unit is shipped with the unit control and the following steps have been completed. disabled.
  • Page 8 Table 3 — Fan Performance — 48A2,A3,A6,A7020 Units AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) AIRFLOW (CFM) 4,000 0.62 0.84 1.07 1.30 1.54 1.78 2.02 2.27 2.51 2.76 5,000 0.97 1.19 1.43 1.69 1.95 2.21 2.48 2.74 3.01 3.28 6,000 1.43 1.65 1.90 2.17...
  • Page 9 Table 5 — Fan Performance — 48A2,A3,A6,A7035 Units AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) AIRFLOW (Cfm) 7,000 2.46 2.80 3.13 3.48 3.82 4.16 4.50 4.83 5.17 5.49 8,000 3.27 3.63 3.99 4.35 4.72 5.08 5.45 5.81 6.18 6.54 9,000 4.23 4.62 5.00 5.38...
  • Page 10 Table 7 — Fan Performance — 48A2,A3,A6,A7050 Units AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) AIRFLOW (Cfm) 8,000 2.98 3.38 3.79 4.20 4.62 5.05 5.49 5.94 6.40 6.86 9,000 3.90 4.33 4.77 5.20 5.65 6.10 6.55 7.02 7.49 7.97 10,000 5.00 5.45 5.91 6.37...
  • Page 11 Table 9 — Fan Performance — 50A2,A3,A6,A7020 Units AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) AIRFLOW (CFM) 4,000 0.54 0.71 0.88 1.05 1.21 1.38 1.55 1.71 1.88 2.04 5,000 0.84 1.02 1.21 1.40 1.59 1.78 1.97 2.16 2.34 2.52 6,000 1.25 1.43 1.63 1.84...
  • Page 12 Table 11 — Fan Performance — 50A2,A3,A6,A7035 Units AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) AIRFLOW (Cfm) 7,000 1.96 2.22 2.47 2.72 2.97 3.22 3.46 3.70 3.94 4.17 8,000 2.62 2.89 3.16 3.43 3.70 3.97 4.23 4.50 4.76 5.02 9,000 3.39 3.68 3.97 4.26...
  • Page 13 Table 13 — Fan Performance — 50A2,A3,A6,A7050 Units AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) AIRFLOW (Cfm) 8,000 2.76 3.15 3.54 3.94 4.34 4.74 5.16 5.58 6.01 6.45 9,000 3.62 4.03 4.45 4.87 5.29 5.72 6.15 6.59 7.03 7.49 10,000 4.62 5.06 5.50 5.95...
  • Page 14 Table 15 — Fan Performance — 48A4,A5,A8,A9020 Units AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) AIRFLOW (CFM) 4,000 0.71 0.97 1.25 1.54 1.84 2.14 2.44 2.75 3.06 3.37 5,000 1.10 1.37 1.66 1.96 2.28 2.60 2.93 3.27 3.60 3.94 6,000 1.61 1.89 2.19 2.51...
  • Page 15 Table 17 — Fan Performance — 48A4,A5,A8,A9035 Units AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) AIRFLOW (Cfm) 7,000 2.59 2.92 3.26 3.61 3.95 4.29 4.63 4.96 5.29 5.62 8,000 3.45 3.81 4.17 4.53 4.90 5.27 5.63 6.00 6.36 6.72 9,000 4.47 4.86 5.24 5.62...
  • Page 16 Table 19 — Fan Performance — 48A4,A5,A8,A9050 Units AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) AIRFLOW (Cfm) 8,000 3.18 3.58 3.99 4.41 4.83 5.27 5.71 6.16 6.63 7.09 9,000 4.17 4.60 5.04 5.48 5.93 6.38 6.84 7.31 7.79 8.28 10,000 5.35 5.80 6.27 6.73...
  • Page 17 Table 21 — Fan Performance — 50A4,A5,A8,A9020 Units AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) AIRFLOW (CFM) 4,000 0.62 0.82 1.04 1.26 1.48 1.71 1.93 2.16 2.38 2.61 5,000 0.95 1.17 1.41 1.65 1.89 2.14 2.39 2.64 2.89 3.14 6,000 1.41 1.64 1.88 2.14...
  • Page 18 Table 23 — Fan Performance — 50A4,A5,A8,A9035 Units AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) AIRFLOW (Cfm) 7,000 2.06 2.32 2.57 2.82 3.06 3.30 3.54 3.78 4.01 4.24 8,000 2.75 3.03 3.30 3.57 3.84 4.10 4.36 4.62 4.87 5.12 9,000 3.57 3.86 4.16 4.45...
  • Page 19 Table 25 — Fan Performance — 50A4,A5,A8,A9050 Units AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) AIRFLOW (Cfm) 8,000 2.95 3.35 3.74 4.14 4.54 4.95 5.36 5.79 6.22 6.66 9,000 3.87 4.29 4.71 5.13 5.56 5.99 6.42 6.87 7.31 7.77 10,000 4.96 5.40 5.85 6.30...
  • Page 20 94.5 NOTES: LEGEND 1. Extensive motor and electrical testing on the Carrier units has ensured that the full horsepower range of the motor can be utilized with confidence. Using the — Brake Horsepower fan motors up to the horsepower ratings shown in the Motor Limitations table —...

  • Page 21: Controls Quick Start

    8. See the Economizer Options section on page 22 for addition- CONTROLS QUICK START al economizer option configurations. The following section will provide a quick user guide to setting 9. See the Exhaust Options section on page 22 for additional up and configuring the A Series units with ComfortLink con- exhaust option configurations.

  • Page 22: Economizer Options

    10. See the Exhaust Options section on this page for additional Programming Operating Schedules exhaust option configurations. The ComfortLink controls will accommodate up to eight different schedules (Periods 1 through 8), and each schedule is assigned to Economizer Options the desired days of the week. Each schedule includes an occupied ...

  • Page 23: Service Test

    S.STP SERVICE TEST Setting Soft Stop to YES turns the unit off in an orderly way, General honoring any time guards currently in effect. The units are equipped with a Service Test feature, which is in- FAN.F tended to allow a service person to force the unit into different modes of operation to test them.

  • Page 24: Service Test Mode Logic

    ® Service Test Mode Logic Humidi-MiZer System Operation in the Service Test mode is sub-mode specific ex- In the Humidi-MiZer (HMZR) sub-menu, it will be possible to cept for the Independent sub-mode. Leaving the sub-mode control and calibrate the Humidi-MiZer modulating valves while a test is being performed and attempting to start a differ- (gas bypass and condenser) while the unit's compressors are ent test in the new sub-mode will cause the previous test to ter-...

  • Page 25: Third Party Control

     to over-drive the valve in the closing direction. This is to en- valve, RHV must first be switched to ON (Service Test  sure that the valve is completely shut and to establish the “ze- COOL RHV) and a Circuit B compressor must be com- ro”...

  • Page 26: Supply Air Reset

    operating circumstances. The ComfortLink controller overrides low reading would mean based on the type of switch being the third party signal for critical operation situations, most no- used. Setting IAQ.L to OPEN means that when the switch is tably smoke and fire control. Wire the input to the controls ex- open the input will read LOW.

  • Page 27: Controls Operation

    adjustable from 0 to 100%. These configurations are also used CONTROLS OPERATION       in conjunction with Configuration AQ.CF Modes IQ.A.F (IAQ 4 to 20 mA Fan Configuration). There are three configurations for IQ.A.F and they follow the same logic as for The ComfortLink controls operate under a hierarchy of com- the discrete input.
  • Page 28 HVAC Mode Numerical Form (H.NUM) Certain overrides may interfere with this process and the nor- mal temperature/humidity control operation of the unit. The This is a numerical representation of the HVAC modes which decision making process that determines the HVAC mode is may be read via a point read.
  • Page 29 HVAC Mode — LOW HEAT (16) HVAC Mode — EVACUATION (21) The unit will be in low heating demand mode using either gas The unit is in the special Fire Evacuation mode where the sup- or electric heat. ply fan is off, the economizer damper is closed and the power exhaust fans are on.
  • Page 30 Unit not in factory System Mode = test AND fire-smoke OFF? control mode is Fire- alarming? System Smoke Mode Control Inputs -> FIRE -> HVAC Mode = OFF Inputs -> FIRE -> Inputs -> FIRE -> FSD in alarm? (Disabled) PRES in alarm? EVAC in alarm? HVAC Mode = OFF...

  • Page 31: Unit Configuration Submenu

    • C.TYP = 5 (SPT-MULTI) Unit Configuration Submenu This configuration will force the control to monitor a The UNIT sub-menu under the Configuration mode of the lo- cal display contains general unit configuration items. The sub- space temperature sensor to make a determination of menu which contains these configurations is located at the lo- mode.
  • Page 32 The sensors and configurations that automatically turn on this configured for discharge pressure transducers and DP.XR board are: should be set to Yes.     Configuration UNIT SFS.M = 1 (Supply Fan Status Suction Pressure Transducer Type (SP.XR) Switch Monitoring) This configuration specifies the type of suction pressure trans- ...

  • Page 33: Cooling Control

    Start Up Delay Time (DLAY) Series ComfortLink control offers the ability to run multiple stages of cooling for either a space temperature sensor or ther- This option delays the unit from operating after a power reset. mostat by controlling the unit to either a low or high cool sup- The configuration may be adjusted from 0 to 900 seconds of ...
  • Page 34 MACHINE DEPENDENT CONFIGURATIONS SUPPLY AIR RESET CONFIGURATION Some configurations are linked to the physical unit and must Supply Air Reset can be used to modify the current cooling supply not be changed. The configurations are provided in case a field air setpoint.
  • Page 35 COOLING CONFIGURATION Motormaster or Greenspeed/low ambient control, it will be neces- sary for an operator to manually change this setting based on the Relevant configurations for mechanical cooling are located at the intended operational ambient condition. This configuration will  local display under Configuration COOL.
  • Page 36 Enable Digital Scroll (DS.EN) Motormaster Control (M.M.) This configuration instructs the unit controls as to whether a The Motormaster control configuration (M.M.) Units with fac- digital scroll compressor is installed. If set to YES, the com- tory installed Motormaster V speed control option, this config- pressor will be controlled by the compressor staging routine uration must be set to YES.
  • Page 37 over the first 5 seconds, mechanical cooling will be shut down, the circuit board. The clearing of strikes during compressor op- and an alarm will be generated (A140). This alarm requires a eration is a combination of 3 complete cycles or 15 continuous manual reset.
  • Page 38 COOL MODE SELECTION PROCESS The A Series ComfortLink controls offer three distinct meth- V.C. ON OHSP ods by which it may select a cooling mode. V.C. OF 1. Thermostat (C.TYP = 3 and 4): The thermostat does not de- L.H.ON pend upon the state of occupancy and the modes are called L.H.OF out directly by the discrete inputs from the thermostat (In-...
  • Page 39 Table 37 — Cool/Heat Setpoint Offsets Configuration ITEM EXPANSION RANGE UNITS CCN POINT DEFAULT D.LV.T COOL/HEAT SETPT. OFFSETS L.H.ON Dmd Level Lo Heat On -1 to 2 DMDLHON H.H.ON Dmd Level(+) Hi Heat On 0.5 to 20.0 DMDHHON L.H.OF Dmd Level(-) Lo Heat Off 0.5 to 2 DMDLHOFF L.C.ON...
  • Page 40 Staging of compressors is shown in Tables 38-45. If one stage of mechanical cooling is on, and the economizer is active, then the economizer will attempt to control to 53°F. EDT Low Override Also If HVAC mode = LOW COOL, the second stage of me- There is an override if EDT drops too low based on an alert chanical cooling will be locked out.
  • Page 41 Table 40 — 2-Stage Sequence — Table 41 — 2-Stage Sequence — 48/50A2,A4,A6,A8020-027 48/50A2,A4,A6,A8030-060 SEQUENCE 1 SEQUENCE 2 SEQUENCE 1 SEQUENCE 2 STAGE STAGE Thermostat Inputs Thermostat Inputs Thermostat Inputs Thermostat Inputs OPEN CLOSED CLOSED OPEN CLOSED CLOSED OPEN CLOSED CLOSED OPEN CLOSED...
  • Page 42 Table 45 — Staging Sequence with Hot Gas Bypass — 48/50A3,A5,A7,A9030-060 SEQUENCE 1 SEQUENCE 2 STAGE COMP Compressor Status Compressor Status UNIT Unit Capacity 48/50A Unit Capacity 48/50A 100% 100% 100% 100% 100% 100% 100% 100% 100% 100% *With minimum load valve ON. COOLING MODE DIAGNOSTIC HELP SUMZ COOLING ALGORITHM To quickly determine the current trip points for the cooling...
  • Page 43 Table 47 — Run Status Cool Display ITEM EXPANSION RANGE UNITS CCN POINT WRITE STATUS COOL COOLING INFORMATION C.CAP Current Running Capacity CAPTOTAL CUR.S Current Cool Stage COOL_STG MAX.S Maximum Cool Stages CLMAXSTG DEM.L Active Demand Limit DEM_LIM forcible SUMZ COOL CAP.
  • Page 44 the space. Pulldown for units is expected to rarely occur, but is ADD.R = R.PCT * (C.CAP – capacity after adding a cooling included for the rare situation when it is needed. Most likely stage) pulldown will occur when mechanical cooling first becomes SUB.R = R.PCT * (C.CAP –...
  • Page 45 Economizer Trim Override • 3 = CCN LOADSHED — This will allow for loadshed and red lining through CCN communications. The unit may drop stages of cooling when the economizer is per- Two-Switch Demand Limiting (DM.L.S = 1) — This type of ...
  • Page 46 The Loadshed Group Number (SH.NM) corresponds to the determine if the second stage fans are configured to respond to loadshed supervisory device that resides elsewhere on the CCN a particular refrigerant circuit (independent control) or both re- network and broadcasts loadshed and redline commands to its frigerant circuits (common control).
  • Page 47 WITHOUT OPTION 20-35 Ton Controlling Output Contactor OFM(s) Circuit Software Board Conrolled Controlled Logic Common CONDFANA MBB Rly 6 OFC1 OFM1 Any compressor ON Common CONDFANB MBB Rly 5 OFC2 OFM2 Circuit A & B # of Fans ON Fans ON Stage 1 OFC1 OFM1...
  • Page 48 WITHOUT OPTION 60 Ton RTPF Controlling Output Contactor OFM(s) OFM_A OFM_B Circuit Software Board Conrolled Controlled Logic Common CONDFANA MBB Rly 6 OFC1 OFM1,2 Any Compressor ON Common CONDFANB MBB Rly 5 OFC2 OFM3,4,5,6 Circuit A # of Fans ON Fans ON Circuit B # of Fans ON...
  • Page 49 WITH MOTORMASTER OPTION 20-35 Ton Controlling Output Contactor OFM(s) Circuit Software Board Conrolled Controlled Logic Common MM_A_RUN SCB Relay 1 OFM1 Any compressor ON, speed via MM_A_VFD Common CONDFANB MBB Rly 5 OFC2 OFM2 Circuit A # of Fans ON Fans ON Circuit B # of Fans ON...

  • Page 50: Heating Control

    Failure Mode Operation For VAV applications, the heat interlock relay (HIR) function provides the switching of a control signal intended for use by If either of the SCT sensors has failed, then the control defaults to the VAV terminals. This signal must be used to command the control based on the OAT sensor and turns on CD.F.B when the terminals to open to their Heating Open positions.
  • Page 51 Table 49 — Heating Configuration ITEM EXPANSION RANGE UNITS CCN POINT DEFAULT HEAT HEATING CONFIGURATION HT.CF Heating Control Type 0 to 3 HEATTYPE HT.SP Heating Supply Air Setpt 80 to 120 SASPHEAT OC.EN Occupied Heating Enabled Yes/No HTOCCENA LAT.M MBB Sensor Heat Relocate Yes/No HTLATMON G.FOD...
  • Page 52 Table 50 — Heat/Cool Setpoint Offsets ITEM EXPANSION RANGE UNITS CCN POINT DEFAULT D.LV.T COOL/HEAT SETPT. OFFSETS L.H.ON Dmd Level Lo Heat On -1 to 2 DMDLHON H.H.ON Dmd Level(+) Hi Heat On 0.5 to 20.0 DMDHHON L.H.OF Dmd Level(-) Lo Heat Off 0.5 to 2 DMDLHOFF L.C.ON...
  • Page 53 HT.CF = 3 (Staged Gas Heating Control) Heat Control Derv. Gain (HT.D) As an option, the units with gas heat can be equipped with This configuration is the derivative term for the PID which staged gas heat controls that will provide from 5 to 11 stages of runs in the HVAC mode LOW HEAT.
  • Page 54 NOTE: The PID values should not be modified without approval staging patterns based on the heat stage type (HT.ST) and the from Carrier. capacity presented by each staging pattern. As the staged gas control desired capacity rises, it is continually checked against IMPORTANT: When gas or electric heat is used in a VAV the capacity of the next staging pattern.
  • Page 55    Table 56 — Staged Gas Heat Control Steps (Configuration HEAT SG.CT HT.ST = 3) RELAY OUTPUT Heat 1 Heat 2 Heat 3 Heat 4 Heat 5 Heat 6 CAPACITY STAGE MBB-RLY8 MBB-RLY7 SCB-RLY1 SCB-RLY2 SCB-RLY3 SCB-RLY4 IGC1 MGV1 IGC2 MGV2...

  • Page 56: Static Pressure Control

    HVAC mode = “Tempering LoCool” Installing a New Sensor HVAC mode = “Tempering HiCool” A field-provided duct-mount temperature sensor (Carrier P/N The decision making/selection process for the tempering trip 33ZCSENPAT or equivalent 10,000 ohms at 25°C NTC [nega- setpoint is as follows: tive temperature coefficient] sensor) is required.
  • Page 57 airflow from the unit, thereby effectively preventing overpres- to only the level required to maintain adequate airflow surization and its accompanying problems. throughout the system. A 48/50A2,A4 unit can be equipped with a VFD for staged air OPERATION volume control. The speed of the fan is controlled directly by On CV units equipped with a VFD (Staged Air Volume) when the ComfortLink controls based on the operating mode of the SP.CF, CV.FD, SP.FN are configured, the ComfortLink con-...
  • Page 58 Additionally, SP.CF must be set to 0 (None) when a unit is VFD Fire Speed Override (SP.FS) equipped with optional VFD bypass and is operating in Bypass This is the speed that the supply fan VFD will use during the mode.
  • Page 59 The SPRESET variable is always assistance from Carrier before making significant changes to checked to be a positive value or zero only (negative values are these factors.

  • Page 60: Fan Status Monitoring

    Table 60 — Static Pressure Reset Related Points ITEM EXPANSION RANGE UNITS CCN POINT DEFAULT Inputs  4-20  SP.M Static Pressure mA 4 to 20 SP_MA  4-20  SP.M.T Static Pressure mA Trim -2.0 to +2.0 SPMATRIM  4-20 SP.R.M Static Pressure Reset mA 4 to 20 SPRST_MA...
  • Page 61 ECONOMIZER FAULT DETECTION AND DIAGNOSTICS 2. SAT has not increased by T24SATMD degrees F SAT_SET/ 2 seconds after closing the economizer at least (FDD) CONTROL T24ECSTS%, taking into account whether the entire move- The Economizer Fault Detection and Diagnostics control can ment has occurred within the range T24TSTMX to 100%.
  • Page 62 SETTING UP THE SYSTEM mizer to modulate to the same control point (Sum Z) that is used to control capacity staging. The advantage is lower com- The economizer configuration options are under the Local Dis- pressor cycling coupled with tighter temperature control. Set- ...
  • Page 63 Economizer Changeover Select (E.SEL) Custom Psychrometric Curves The control is capable of performing any one of the following Refer to the psychrometric chart and the standard Honeywell A-D changeover types in addition to both the dry bulb lockout and curves in Fig. 11. The curves start from the bottom and rise verti- the external switch enable input: cally, angle to the left and then fold over.
  • Page 64 UNOCCUPIED ECONOMIZER FREE COOLING When the Unoccupied Economizer Free Cooling mode is ac- tive, the supply fan is turned on and the economizer damper This Free Cooling function is used to start the supply fan and   modulated to control to the supply air setpoint (Setpoints use the economizer to bring in outside air when the outside ...
  • Page 65 ECONOMIZER OPERATION CONFIGURATION If the economizer is allowed to do free cooling and the Unoc-  cupied Free Cooling Mode is ON, then EC.C.P = Setpoints The configuration items in the E.CFG menu group affect how   SASP + Inputs RSET SA.S.R.

  • Page 66: Building Pressure Control

    Building Pressure Setpoint Offset (BP.SO) Building Pressure Control The building pressure control sequence provides control of pres- This configuration is the value below the building pressure set- sure in the building through the modulating flow rate function of point to which the building pressure must fall in order to turn the modulating power exhaust option.
  • Page 67 Building Pressure SETP (BP.SP) threshold technique for bringing stages of power exhaust on and off. This setpoint is the building pressure control setpoint. If the The number of power exhaust stages available for this control unit is configured for modulating building pressure control, algorithm is a function of the number of motors it supports.

  • Page 68: Smoke Control Modes

    Table 66 — Power Exhaust Staging (BP.CF = 1) BP.MT = 1 (4 motors) PE.A PE.B PE.C Power Exhaust Stage 0 Power Exhaust Stage 1 Power Exhaust Stage 2 BP.MT = 2 (6 motors) PE.A PE.B PE.C Power Exhaust Stage 0 Power Exhaust Stage 1 Power Exhaust Stage 2 Table 67 —...

  • Page 69: Indoor Air Quality Control

    The configurable fire speed override for supply fan VFD is in generated by all sources including people. The EC.MN value is   Configuration SP.FS. the design value for maximum occupancy. The supply fan relay’s commanded output can be found in Out- The logic that is used to control the dampers in response to ...
  • Page 70 The economizer position would be command based on the sup- ply fan speed by interpolation between the (20,20) and (100,5) coordinates: The results are shown in Fig. 15. The comparison between the Dual Setpoint and Fixed Minimum configurations is shown in the following example as in Fig. 16. SETTING UP THE SYSTEM The IAQ configuration options are under the Local Display ...
  • Page 71 SFAN_VFD % Fig. 15 — Example of Economizer Position of Dual Setpoint Configuration FIXED MIN WITH OFFSET FIXED MINIMUM SFAN_VFD % Fig. 16 — Example of Dual Setpoint Versus Fixed Minimum Economizer Position...
  • Page 72 Table 68 — Indoor Air Quality Configuration ITEM EXPANSION RANGE UNITS CCN POINT DEFAULT DCV.C DCV ECONOMIZER SETPOINTS EC.MN Economizer Min.Position 0 to 100 ECONOMIN IAQ.M IAQ Demand Vent Min.Pos. 0 to 100 IAQMINP AQ.CF AIR QUALITY CONFIGS IQ.A.C IAQ Analog Sensor Config 0 to 4 IAQANCFG IQ.A.F...

  • Page 73: Dehumidification And Reheat

     IQ.R.L) IAQ.P IQ.L.O) This is the reference that will be used with a non-Carrier IAQ Nighttime lockout temperature below which the purge cycle sensor that may have a different characteristic curve. It rep- will be disabled. resents the CO level at 4 mA.
  • Page 74 Vent Reheat Setpoint Select (D.V.CF) If an associated RARH sensor responsible for dehumidification fails, dehumidification will not be attempted; see Alert T078 This configuration determines how the vent reheat setpoint is Return Air Relative Humidity Sensor Fail. selected. Initiating a Dehumidification Mode •...

  • Page 75: Humidi-Mizer Adaptive Dehumidification System

    The Humidi-MiZer coil will reheat to the current normal cool- Humidi-MiZer Adaptive Dehumidification System ing control point if it is greater than the dehumidification cool Units with the factory-equipped Humidi-MiZer option are ca- ® control point. Venting Dehum is the second reheat mode based pable of providing multiple modes of improved dehumidifica- on control type temperature demand.

  • Page 76: Temperature Compensated Start

    meet the latent load. As the refrigerant leaves the compressor, the setpoints. This will allow the control to start the unit so that the modulating valves vary the amount of refrigerant that enters and/ space is at conditioned levels when the occupied period starts. or bypasses the condenser coil.

  • Page 77: Carrier Comfort Network (Ccn) System

    ® If this configuration is set to ON, then when any broadcasting is pate as an element of the Carrier Comfort Network (CCN) sys- done on the bus, this device will respond to and acknowledge. tem directly from the local display. This section will deal with Only one device per bus can be configured for this option.

  • Page 78: Alert Limit Configuration

    Accept Global Holidays? (HOL.T) SPT Low Alert Limit/Unocc (SP.L.U) If a device is broadcasting the time on the bus, it is possible to If the space temperature is below the configurable unoccupied accept the time yet not accept the global holiday from the SPT Low Alert Limit (SP.L.U), then Alert 300 will be generated broadcast message.

  • Page 79: Sensor Trim Configuration

    This is used when Hi Alert Limit (BP.H). If the measured pressure is above the field-supplied switches or input devices are used instead of Carrier limit, then Alert 313 will occur. devices. The normally open or normally closed setting may be dif- Indoor Air Quality High Alert Limit (IAQ.H)

  • Page 80: Display Configuration

    Remote Switch — Off (RMI.L) Evacuation Switch — Off (EVC.L) The remote switch is set for normally open when off. If a field- The evacuation input is set for normally open when off. If a supplied control switch is used that is normally closed for an field-supplied evacuation input is used that is normally closed, off signal, change this variable to closed.

  • Page 81: Hot Gas Bypass

      Remote Switch Config (Configuration UNIT RM.CF) bypass. A hot gas refrigerant line routes the bypassed hot gas from Circuit A’s discharge line to Circuit A’s evaporator dis- This is the configuration that allows the user to assign different tributor.

  • Page 82: Time Clock Configuration

      Monday In Period (PER.X DAYS MON) TIME CLOCK CONFIGURATION This variable is used to include or remove Monday from the This section describes each Time Clock menu item. Not every schedule. Each period is assigned an occupied on and off time. If point will need to be configured for every unit.

  • Page 83: Local Holiday Schedules (Hol.l)

       Friday In Period (PER.X DAYS FRI) Daylight Savings Start Week (DS.ST ST.WK) This variable is used to include or remove Friday from the This is the start week of the month for daylight savings. The schedule. Each period is assigned an occupied on and off time. week can be set from 1 to 5.

  • Page 84: Humidi-Mizer Troubleshooting

    THERMISTOR/TEMPERATURE SENSOR CHECK Humidi-MiZer Troubleshooting Use the unit scrolling marquee or a CCN device to view the sta- A high quality digital volt-ohmmeter is required to perform tus display and the diagnostic display for information concerning this check. cooling operation with the Humidi-MiZer system. Check the 1.
  • Page 85 Table 78 — Cooling Service Analysis PROBLEM SOLUTION COMPRESSOR DOES NOT RUN Active Alarm Check active alarms using local display. Contactor Open 1. Power off. 1. Restore power. 2. Fuses blown in field power circuit. 2. After finding cause and correcting, replace with correct size fuse. 3.
  • Page 86 Table 78 — Cooling Service Analysis (cont) PROBLEM SOLUTION COMPRESSOR LOSES OIL 1. Leak in system. 1. Repair leak. 2. Crankcase heaters not energized during shutdown. 2. Check wiring and relays. Check heater and replace if defective. FROSTED SUCTION LINE Expansion valve admitting excess refrigerant.
  • Page 87 ® Table 79 — Humidi-MiZer Service Analysis PROBLEM CAUSE REMEDY Circuit A compressors unavailable for 020- Check alarm history for general cooling mode operation problems. 027 units. Circuit B compressors unavail- See Table 78. able for 030-060 units Check for compressors locked out. General Cooling Mode problem See Table 78.
  • Page 88 ® Table 79 — Humidi-MiZer Service Analysis (cont) PROBLEM CAUSE REMEDY Supply air setpoint for cooling is too high/ Check the unit supply air setpoint for cooling operation. This is the temperature that Humidi-MiZer valves will modulate to meet during a dehumidification mode.
  • Page 89 Table 81 — Electric Heat Service Analysis PROBLEM CAUSE REMEDY No Heat. Power failure. Call power company. Fuse blown or circuit breaker tripped. Replace fuse or reset circuit breaker. Thermostat occupancy schedule setpoint not call- Check using ComfortLink scrolling marquee. ing for Heating.
  • Page 90 LEGEND IDM — Induced-Draft Motor IGC — Integrated Gas Unit Controller NOTE: Thermostat Fan Switch in the “AUTO” position. Fig. 19 — IGC Service Analysis Logic...
  • Page 91 Table 82 — 5K Thermistor Temperature vs. Resistance (SCT Sensors) (English) VOLTAGE VOLTAGE VOLTAGE TEMP RESISTANCE TEMP RESISTANCE TEMP RESISTANCE DROP DROP DROP (Ohms) (Ohms) (Ohms) 1.982 7,686 0.511 1,190 –25 3.699 98,010 1.956 7,665 0.502 1,165 –24 3.689 94,707 1.930 7,468 0.494...
  • Page 92 Table 83 — 5K Thermistor Temperature vs. Resistance (SCT Sensors) (SI) VOLTAGE VOLTAGE VOLTAGE TEMP RESISTANCE TEMP RESISTANCE TEMP RESISTANCE DROP DROP DROP (Ohms) (Ohms) (Ohms) 1.982 7,855 0.506 1,158 –32 3.705 100,260 1.935 7,499 0.490 1,118 –31 3.687 94,165 1.889 7,161 0.475...
  • Page 93 Table 85 — 10K Thermistor vs. Resistance (T55, T56, OAT, RAT, EDT, LAT, SAT Sensors) (English) TEMP VOLTAGE RESISTANCE TEMP VOLTAGE RESISTANCE TEMP VOLTAGE RESISTANCE DROP (V) (Ohms) DROP (V) (Ohms) DROP (V) (Ohms) –25 4.758 196,453 2.994 14,925 0.890 2,166 –24 4.750...
  • Page 94 Table 86 — 10K Thermistor vs. Resistance (T55, T56, OAT, RAT, EDT, LAT, SAT Sensors) (SI) TEMP VOLTAGE RESISTANCE TEMP VOLTAGE RESISTANCE TEMP VOLTAGE RESISTANCE DROP (V) (Ohms) DROP (V) (Ohms) DROP (V) (Ohms) –32 4.762 200,510 3.056 15,714 0.940 2,315 –31 4.748...
  • Page 95 Table 88 — Suction Pressure Transducer (PSIG) vs. Voltage (SP-A, SP-B) PRESSURE VOLTAGE PRESSURE VOLTAGE PRESSURE VOLTAGE PRESSURE VOLTAGE (PSIG) DROP (V) (PSIG) DROP (V) (PSIG) DROP (V) (PSIG) DROP (V) 0.466 1.509 2.543 3.576 0.476 1.519 2.553 3.586 0.486 1.529 2.562 3.596...
  • Page 96 Table 89 — Discharge Pressure Transducer (PSIG) vs. Voltage (DP-A, DP-B) PRESSURE VOLTAGE PRESSURE VOLTAGE PRESSURE VOLTAGE PRESSURE VOLTAGE (PSIG) DROP (V) (PSIG) DROP (V) (PSIG) DROP (V) (PSIG) DROP (V) 14.5 0.500 0.993 1.490 1.987 0.509 1.000 1.496 1.993 0.515 1.006 1.502...
  • Page 97 Table 89 — Discharge Pressure Transducer (PSIG) vs. Voltage (DP-A, DP-B) (cont) PRESSURE VOLTAGE PRESSURE VOLTAGE PRESSURE VOLTAGE PRESSURE VOLTAGE (PSIG) DROP (V) (PSIG) DROP (V) (PSIG) DROP (V) (PSIG) DROP (V) 2.483 2.992 3.501 4.010 2.489 2.998 3.507 4.016 2.495 3.004 3.513...

  • Page 98: Forcing Inputs And Outputs

      Run Status VIEW EC.C.P Forcing Inputs and Outputs Many variables may be forced both from the CCN and directly This variable displays the current economizer control point at the local display. This can be useful during diagnostic testing value (a target value for air temperature leaving the evaporator and also during operation, typically as part of an advanced coil location).
  • Page 99 Table 90 — Auto View of Run Status Display Table ITEM EXPANSION RANGE UNITS POINT WRITE STATUS VIEW AUTO VIEW OF RUN STATUS HVAC ascii string spelling out the hvac modes string Occupied ? YES/NO OCCUPIED forcible Mixed Air Temperature Evaporator Discharge Tmp Leaving Air Temperature EC.C.P...
  • Page 100 Next Stage EDT Decrease (ADD.R) every 30 seconds. This override is intended to react to situa- tions where the load rapidly increases. This variable represents (if adding a stage of cooling) how Low Temp Cap Override (L.TMP) much the temperature should drop in degrees depending on the R.PCT calculation and how much additional capacity is to be If the error is less than twice Y.MIN, and the rate of change of added.

  • Page 101: Alarms And Alerts

    Table 94 — CCN/Linkage Display Table ITEM EXPANSION RANGE UNITS POINT WRITE STATUS LINK CCN - LINKAGE MODE Linkage Active - CCN ON/OFF MODELINK L.Z.T Linkage Zone Control Tmp L.C.SP Linkage Curr. Cool Setpt LCSP L.H.SP Linkage Curr. Heat Setpt LHSP Table 95 —...
  • Page 102 Table 99 — Alert and Alarm Codes ALARM OR RESET ALERT DESCRIPTION ACTION TAKEN BY CONTROL PROBABLE CAUSE METHOD NUMBER A051 Circuit A, Compressor 1 Stuck On Failure Turn off all compressors Manual Welded contact Automatic High pressure switch, compressor P051 Circuit A, Compressor 1 Failure Add strike to compressor...
  • Page 103 Table 99 — Alert and Alarm Codes (cont) ALARM OR RESET ALERT DESCRIPTION ACTION TAKEN BY CONTROL PROBABLE CAUSE METHOD NUMBER A181 Circuit A ODF VFD Communication Failure Stop Circuit Manual Wiring error, board failure, VFD fault A182 Circuit B ODF VFD Communication Failure Stop Circuit Manual Wiring error, board failure, VFD fault...
  • Page 104 DIAGNOSTIC ALARM CODES AND POSSIBLE CAUSES IMPORTANT: Prolonged operation in the wrong direction T051, P051 (Circuit A, Compressor 1 Failure) can damage the compressor. Correct rotation can be verified T052, P052 (Circuit A, Compressor 2 Failure) by a gage set and looking for a differential pressure rise on start-up.
  • Page 105 T064 (Circuit A Saturated Temperature Transducer Failure) this sensor will disable any elements of the control which re- quires its use including economizer outdoor and differential T065 (Circuit B Saturated Temperature Transducer Failure) enthalpy control. The OA.RH sensor is located in the econo- Alert codes 064 and 065 are for circuits A and B respectively.
  • Page 106 P120 (Circuit A Low Saturated Suction Temperature — P126 and P127 alerts may be stored in alarm history but not broadcast. Compressor A2 Shutdown) T128 (Digital Scroll High Discharge Temperature Alert) T120 (Circuit A Low Saturated Suction Temperature Alert) A128 (Digital Scroll High Discharge Temperature Alarm) A120 (Circuit A Low Saturated Suction Temperature Alarm) This alert/alarm is for units with a digital scroll compressor on- P121 (Circuit B Low Saturated Suction Temperature —...
  • Page 107 This alarm will disable mechanical cooling and will require a control modes, and the fan status switch. The alarm will auto- manual reset. This alarm may be disabled once the reverse ro- matically reset.   tation check has been verified by setting Configuration A173 (ECB1 Board Communication Failure) ...
  • Page 108 T210 (Building Pressure Transducer Failure) T304 (Return Air Temperature Below Limit)   The building pressure transducer (Pressures AIR.P If the return-air temperature measured by the RAT sensor is be- fails if the signal from the 4 to 20 mA building pressure trans- low the configurable RAT LO Alert Limit/Occ (Configuration ...
  • Page 109 fire shutdown input is energized (fire shutdown is in effect), or A409 (Supply Fan Commanded On, Sensed Off Failure) if two fire smoke modes are incorrectly energized at the same A409 (Supply Fan Commanded Off, Sensed On Failure) time, a fire shutdown mode will occur. This is an emergency mode requiring the complete shutdown of the unit.

  • Page 110: Major System Components

    T414 (Damper Not Modulating) heat). This alarm occurs when the temperature sensor (Tempera-   tures AIR.T SAT) is outside the range –40 to 240°F (–40 to This alert occurs when the damper not modulating. The alert oc- 116°C). This alarm resets automatically. The cause of the alarm is curs when SAT does not change as expected when the damper is usually a faulty thermistor, a shorted or open thermistor caused by moved.

  • Page 111: Factory-Installed Components

    ECB1, ECB2, SCB, SCB2, EXV, es, including: and CEM boards through the LEN communications port. The MBB also interfaces with the Carrier Comfort Network ® sys- •...
  • Page 114 Fig. 22 — Typical 2 Stage Gas Heat Wiring Schematic (Size 060 Units Shown)
  • Page 115 NEXT PAGE Fig. 23 — Typical Staged Gas Heat Wiring Schematic (Size 060 Units Shown)
  • Page 116 Fig. 23 — Typical Staged Gas Heat Wiring Schematic (Size 060 Units Shown) (cont)
  • Page 123 — Circuit Breaker — Rated Load Amps — Control Circuit Breaker — Relay — Crankcase Heater — Rollout Switch — Carrier Comfort Network ® RTPF — Round Tube, Plate Fin — Cooling Coil Thermistor — Rooftop Control Board — Controls Expansion Module —...
  • Page 124 1 = Closes RLY11A/RLY11B YAC — Gas Heat Unit RED LED - STATUS YELLOW LED - GREEN LED- CCN (CARRIER COMFORT NETWORK) LEN (LOCAL EQUIPMENT NETWORK) INSTANCE JUMPER (SET TO 1) CEPL130346-02 HK 50AA052 CE BO 430346 STATUS Fig. 30 — Main Base Board (MBB)
  • Page 125 Table 101 — Economizer Control Board (ECB1) Inputs and Outputs POINT I/O POINT PLUG AND PIN POINT DESCRIPTION SIGNAL PIN(S) PORT STATE NAME NAME REFERENCE INPUTS RMTIN Remote occupancy J4, 1-2 24VAC = 1, 0VAC = 0 ECONENBL, Economizer enable J4, 3-4 24VAC = 1, 0VAC = 0 ECOORIDE...
  • Page 126 Fig. 31 — Economizer Control Board (ECB1) and VAV Control Board (ECB2) Table 103 — Staged Gas Control Board (SCB) Inputs and Outputs POINT I/O POINT PLUG AND PIN POINT DESCRIPTION SIGNAL PIN(S) PORT STATE NAME NAME REFERENCE INPUTS J5, 1-3 1=5v, 2=Vin, 3=GND (thermistor 1-2) (0 to 5VDC, thermistor, ohms) J5, 4-6...
  • Page 127 ADDRESS DIP RED LED- GREEN LED- SWITCHES ALL ON STATUS LEN (LOCAL EQUIPMENT NETWORK) CEBD430427 HK50AA032 CEPL130427 4-POSITION DIP SWITCH XDCR/THERM THERM 0-20mA OUT Fig. 32 — Staged Gas Heat Control Board (SCB) Table 104 — Low Ambient Control Board (SCB2) Inputs and Outputs POINT POINT I/O POINT...
  • Page 128 Table 105 — Controls Expansion Board (CEM) Inputs POINT I/O POINT PLUG AND PIN POINT DESCRIPTION SIGNAL PIN(S) PORT STATE NAME NAME REFERENCE INPUTS Supply Fan Status switch DI 1 J7, 1-2 0 = 24vac, 1= 0vac DMD_SW1 Demand Limit - SW1 DI 2 J7, 3-4 0 = 24vac, 1= 0vac...
  • Page 129 Table 106 — Humidi-MiZer Control Board (EXV) Inputs and Outputs POINT I/O POINT PLUG AND PIN POINT DESCRIPTION SIGNAL PIN(S) PORT STATE NAME NAME REFERENCE INPUTS Air Temp Lvg Evap Coil J5, 5-6 5=Vin, 6=GND (Thermistor, ohms) J5, 7-8 7=Vin,8 =GND (Thermistor, ohms) J5, 9-10 9=Vin, 10=GND...
  • Page 130 4.33 0.25 TYP. 3.83 5.93 R146 STATUS 5.68 R115 R118 R138 R120 2.95 R14 R15 ANALOG 0.25 TYP. 0.06 1.65 0.57 MAX. NOTE: Dimensions are shown in inches. Fig. 34 — Humidi-MiZer EXV Board Table 107 — IGC Board Inputs and Outputs CONNECTOR POINT NAME POINT DESCRIPTION...
  • Page 131 SCROLLING MARQUEE Table 108 — VFD Terminal Designations This device is the keypad interface used to access the control TERMINAL FUNCTION information, read sensor values, and test the unit. The scrolling marquee display is a 4-key, 4-character, 16-segment LED dis- play as well as an Alarm Status LED.
  • Page 132 – Fig. 36 — VFD Wiring THERMISTORS AND PRESSURE TRANSDUCERS RETURN AIR CO SENSOR The 48/50A2,A3,A4,A5 units are equipped with four pressure The unit can also be equipped with a return air IAQ CO sensor transducers. These units have two pressure transducers con- that is used for the demand controlled ventilation.
  • Page 133 Table 109 — Field Connection Terminal Strips TERMINAL TERMINAL DESCRIPTION TYPE BOARD TB-1 - POWER CONNECTION OR DISCONNECT (in Main Control Box) L1 power supply 208-230/460/575/380/-3-60, 400-3-50 L2 power supply 208-230/460/575/380/-3-60, 400-3-50 L3 power supply 208-230/460/575/380/-3-60, 400-3-50 TB-2 - GROUND (in Main Control Box) Neutral Power TB-3 - CCN COMMUNICATIONS (HY84HA096) (in Main Control Box) LEN +...

  • Page 134: Accessory Control Components

    • differential dry bulb Accessory Control Components • outdoor air enthalpy curves In addition to the factory-installed options, the units can also be equipped with several field-installed accessories that ex- • differential enthalpy pand the control features of the unit. The following hardware •...
  • Page 135 Yellow LED tem elements on the bus. The MBB has one yellow LED. The Carrier Comfort Network ® (CCN) LED will blink during times of network communication. The other boards do not have a CCN communications port.
  • Page 136 MIXING TERMINAL TERMINAL NON CARRIER HVAC EQUIPMENT COMFORT AIR DISTRIBUTION-DIGITAL AIR VOLUME CONTROL (DAV) CONTROLLER LEGEND ® — Carrier Comfort Network — ComfortID™ Controls — ComfortLink Controls HVAC — Heating, Ventilation, and Air Conditioning Fig. 40 — CCN System Architecture...

  • Page 137: Service

    SERVICE WARNING Before performing service or maintenance operations on unit, turn off main power switch to unit. Electrical shock could cause personal injury. Service Access All unit components can be reached through clearly labelled hinged access doors. These doors are not equipped with tie- backs, so if heavy duty servicing is needed, either remove them or prop them open to prevent accidental closure.
  • Page 138 This cleaner is Harsh chemicals, household bleach or acid or basic clean- available from Carrier Replacement parts division as part num- ers should not be used to clean outdoor or indoor coils of ber P902-0301 for a one gallon container, and part number any kind.

  • Page 139: Lubrication

    6. Thoroughly apply Totaline environmentally balanced coil Lubrication cleaner solution to all coil surfaces including finned area, FAN SHAFT BEARINGS tube sheets and coil headers. Lubricate bearings at least every 6 months with suitable bear- 7. Hold garden sprayer nozzle close to finned areas and apply ing grease.

  • Page 140: Evaporator Fan Coupling Assembly

    have collars that need to be inserted into the smaller hole of Evaporator Fan Coupling Assembly the drive shaft flange. If the coupling has been removed for other blower assembly com- 8. Assemble the flex member/drive shaft assembly to one of the ponent repair or replacement, it is critical that the coupling be reas- shaft flanges, using 2 bolts and nuts.

  • Page 141: Evaporator Fan Service And Replacement

    Evaporator Fan Service and Replacement 1. Turn off unit power supply. 2. Remove supply-air section panels. 3. Remove belt and blower pulley. 4. Loosen setscrews in blower wheels. 5. Remove locking collars from bearings. 6. Remove shaft. 7. Remove venturi on opposite side of bearing. 8.

  • Page 142: Power Failure

    Amount of refrigerant charge is listed on unit nameplate. Refer charging chart. If intersection point is above the line, carefully to Carrier GTAC II; Module 5; Charging, Recovery, Recycling, recover some of the refrigerant. If intersection point is below and Reclamation section for charging methods and procedures.
  • Page 143 20 Ton MCHX CIRCUIT A Charging Chart All Compressors on a Circuit Must be Operating All Outdoor Fans Must be Operating S S T = 5 5 F S S T = 4 5 F S S T = 3 5 F Reduce Charge if Above Curve Add Charge if Below Curve Outdoor Air Temperature (deg F)
  • Page 144 25 and 27 Ton MCHX CIRCUIT A Charging Chart All Compressors on a Circuit Must be Operating All Outdoor Fans Must be Operating S S T= 5 5 F S S T= 4 5 F S S T= 3 5 F Reduce Charge if Above Curve Add Charge if Below Curve Outdoor Air Temperature (deg F)
  • Page 145 30 Ton MCHX CIRCUIT A Charging Chart All Compressors on a Circuit Must be Operating All Outdoor Fans Must be Operating S S T= 5 5 F S S T= 4 5 F S S T= 3 5 F Reduce Charge if Above Curve Add Charge if Below Curve Outdoor Air Temperature (deg F) 30 Ton MCHX CIRCUIT B Charging Chart...
  • Page 146 35 Ton MCHX CIRCUIT A Charging Chart All Compressors on a Circuit Must be Operating All Outdoor Fans Must be Operating S S T = 5 5 F S S T = 4 5 F S S T = 3 5 F Reduce Charge if Above Curve Add Charge if Below Curve Outdoor Air Temperature (deg F)
  • Page 147 40 Ton MCHX Charging Chart All Compressors on a Circuit Must be Operating All Outdoor Fans Must be Operating S S T= 5 5 F S S T= 4 5 F S S T= 3 5 F Reduce Charge if Above Curve Add Charge if Below Curve Outdoor Air Temperature (deg F) LEGEND...
  • Page 148 60 Ton MCHX CIRCUIT A Charging Chart All Compressors on a Circuit Must be Operating All Outdoor Fans Must be Operating S S T= 5 5 F S S T= 4 5 F S S T= 3 5 F Reduce Charge if Above Curve Add Charge if Below Curve Outdoor Air Temperature (deg F) 60 Ton MCHX CIRCUIT B Charging Chart...

  • Page 149: Gas Valve Adjustment

    Replacement Parts 5. Set thermostat at setting to call for heat (high fire). A complete list of replacement parts may be obtained from any Carrier distributor upon request. 6. Remove screw cap covering regulator adjustment screw (See Fig. 56). HIGH-FIRE REGULATOR 7.

  • Page 150: Appendix A - Local Display Tables

    APPENDIX A — LOCAL DISPLAY TABLES MODE — RUN STATUS ITEM EXPANSION RANGE UNITS CCN POINT WRITE STATUS PAGE NO. VIEW AUTO VIEW OF RUN STATUS HVAC ascii string spelling out the hvac modes string 98,99 Occupied ? YES/NO OCCUPIED forcible 98,99 Mixed Air Temperature...
  • Page 151 APPENDIX A — LOCAL DISPLAY TABLES (cont) MODE — RUN STATUS (cont) ITEM EXPANSION RANGE UNITS CCN POINT WRITE STATUS PAGE NO. COMPRESSOR RUN HOURS HR.A1 Compressor A1 Run Hours 0 to 999999 HR_A1 config HR.A2 Compressor A2 Run Hours 0 to 999999 HR_A2 config...
  • Page 152 APPENDIX A — LOCAL DISPLAY TABLES (cont) MODE — SERVICE TEST (cont) ITEM EXPANSION RANGE UNITS CCN POINT WRITE STATUS PAGE NO. HMZR TEST HUMIDIMIZER HumidiMiZer 3-Way Valve ON/OFF RHV_TST C.EXV Condenser EXV Position 0 to 100 CEXVHTST B.EXV Bypass EXV Position 0 to 100 BEXVHTST C.CAL...
  • Page 153 APPENDIX A — LOCAL DISPLAY TABLES (cont) MODE — INPUTS ITEM EXPANSION RANGE UNITS CCN POINT WRITE STATUS GEN.I GENERAL INPUTS FLT.S Filter Status Input DRTY/CLN FLTS forcible G.FAN Fan Request From IGC ON/OFF IGCFAN REMT Remote Input State RMTIN forcible E.SW Economizer Control Input...
  • Page 154 APPENDIX A — LOCAL DISPLAY TABLES (cont) MODE — OUTPUTS ITEM EXPANSION RANGE UNITS CCN POINT WRITE STATUS FANS FANS S.FAN Supply Fan Relay ON/OFF SFAN_RLY S.VFD Supply Fan VFD Speed 0 to 100 SFAN_VFD P.E.A Power Exhaust Relay A ON/OFF PE_A P.E.B...
  • Page 155 APPENDIX A — LOCAL DISPLAY TABLES (cont) MODE — CONFIGURATION (cont) ITEM EXPANSION RANGE UNITS CCN POINT DEFAULT PAGE NO. COOL COOLING CONFIGURATION Z.GN Capacity Threshold Adjst -10 to 10 Z_GAIN 35,42-44 MC.LO Compressor Lockout Temp -20 to 55 OATLCOMP 35,45 C.FOD Fan-off Delay, Mech Cool...
  • Page 156 APPENDIX A — LOCAL DISPLAY TABLES (cont) MODE — CONFIGURATION (cont) ITEM EXPANSION RANGE UNITS CCN POINT DEFAULT PAGE NO. O.PID OUTDOOR VFD PID CONFIGS OV.RR Outdoor VFD PI Run Rate 5 to 120 OV_RATE OV.PG Outdoor VFD Prop. Gain 0 to 5 OV_PG OV.TI...
  • Page 157 APPENDIX A — LOCAL DISPLAY TABLES (cont) MODE — CONFIGURATION (cont) ITEM EXPANSION RANGE UNITS CCN POINT DEFAULT PAGE NO. ECON ECONOMIZER CONFIGURATION EC.EN Economizer Installed? Yes/No ECON_ENA 22,62 EC.MN Economizer Min.Position 0 to 100 ECONOMIN 22,26,27,62,69 EC.MX Economizer Max.Position 0 to 100 ECONOMAX 22,47,58,62...
  • Page 158 APPENDIX A — LOCAL DISPLAY TABLES (cont) MODE — CONFIGURATION (cont) ITEM EXPANSION RANGE UNITS CCN POINT DEFAULT PAGE NO. INDOOR AIR QUALITY CFG. DCV.C DCV ECONOMIZER SETPOINTS Economizer Min.Position 0 to 100 ECONOMIN 22,26,27,67, EC.MN IAQ.M IAQ Demand Vent Min.Pos. 0 to 100 IAQMINP 26,67,72...
  • Page 159 APPENDIX A — LOCAL DISPLAY TABLES (cont) MODE — CONFIGURATION (cont) ITEM EXPANSION RANGE UNITS CCN POINT DEFAULT PAGE NO. ALLM ALERT LIMIT CONFIG. SP.L.O SPT lo alert limit/occ –10 to 245 SPLO 78,108 SP.H.O SPT hi alert limit/occ –10 to 245 SPHO 78,108 SP.L.U...
  • Page 160 APPENDIX A — LOCAL DISPLAY TABLES (cont) MODE — TIME CLOCK ITEM EXPANSION RANGE UNITS CCN POINT DEFAULT PAGE NO. TIME TIME OF DAY HH.MM Hour and Minute 00:00 TIME DATE MONTH,DATE,DAY AND YEAR MNTH Month of Year multi-text strings Day of Month 0 to 31 Day of Week...

  • Page 161: Appendix B - Ccn Tables

    All A Series units with ComfortLink controls have a port for In the following tables the structure of the tables which are used with the Service Tool as well as the names and data that interface with the Carrier Comfort Network ® (CCN) system.
  • Page 162 APPENDIX B — CCN TABLES (cont) STATUS DISPLAY TABLES (cont) TABLE DISPLAY NAME RANGE UNITS POINT NAME WRITE STATUS GENERAL Occupied ? Yes/No OCCUPIED forcible Static Pressure " H2O Building Pressure " H2O Outside Air Rel.Humidity OARH forcible Return Air Rel.Humidity RARH forcible Space Temperature Offset...
  • Page 163 APPENDIX B — CCN TABLES (cont) STATUS DISPLAY TABLES (cont) TABLE DISPLAY NAME RANGE UNITS POINT NAME WRITE STATUS TEMPCTRL Evaporator Discharge Tmp Leaving Air Temperature Mixed Air Temperature Controlling Return Temp RETURN_T forcible Controlling Space Temp SPACE_T forcible TEMPS Air Temp Lvg Supply Fan Return Air Temperature forcible...
  • Page 164 APPENDIX B — CCN TABLES (cont) STATUS DISPLAY TABLES (cont) TABLE DISPLAY NAME RANGE UNITS POINT NAME WRITE STATUS UOUTPUTS FANS Supply Fan Relay On/Off SFAN_RLY Supply Fan VFD Speed 0 to 100 SFAN_VFD Supply Fan Request Yes/No SFANFORC forcible Exhaust Fan VFD Speed 0 to 100 EFAV_VFD...
  • Page 165 APPENDIX B — CCN TABLES (cont) CONFIG TABLES TABLE NAME RANGE UNITS POINT NAME DEFAULT ALARMDEF Alarm Routing Control 00000000 to 11111111 ALRM_CNT 11000000 Equipment Priority 0 to 7 EQP_TYPE Comm Failure Retry Time 1 to 240 RETRY_TM Re-Alarm Time 1 to 255 RE-ALARM Alarm System Name...
  • Page 166 APPENDIX B — CCN TABLES (cont) CONFIG TABLES (cont) TABLE NAME RANGE UNITS POINT NAME DEFAULT SCHEDOVR Schedule Number 0 to 99 SCHEDNUM Accept Global Holidays? Yes/No HOLIDAYT Override Time Limit 0 to 4 hours Timed Override Hours 0 to 4 hours OVR_EXT Accepting an Override:...
  • Page 167 APPENDIX B — CCN TABLES (cont) SERVICE-CONFIG TABLES TABLE NAME RANGE UNITS POINT NAME DEFAULT ALLM SPT lo alert limit/occ –10 to 245 SPLO SPT hi alert limit/occ –10 to 245 SPHO SPT lo alert limit/unocc –10 to 245 SPLU SPT hi alert limit/unocc –10 to 245 SPHU...
  • Page 168 APPENDIX B — CCN TABLES (cont) SERVICE-CONFIG TABLES (cont) TABLE NAME RANGE UNITS POINT NAME DEFAULT DEHU Dehumidification Config 0 to 2 DHSELECT Dehumidification Sensor 1 to 2 DHSENSOR Econ disable in DH mode? Yes/No DHECONEN Vent Reheat Setpt Select 0 to 1 DHVHTCFG Vent Reheat RAT offset...
  • Page 169 APPENDIX B — CCN TABLES (cont) SERVICE-CONFIG TABLES (cont) TABLE NAME RANGE UNITS POINT NAME DEFAULT EDTR EDT Reset Configuration 0 to 3 EDRSTCFG Reset Ratio 0 to 10 RTIO Reset Limit 0 to 20 LIMT EDT 4-20 ma Reset Input Enable/Disable EDTRSENS Disable...
  • Page 170 APPENDIX B — CCN TABLES (cont) SERVICE-CONFIG TABLES (cont) TABLE NAME RANGE UNITS POINT NAME DEFAULT GSCONFIG Unit Size 20-60 tons UNITSIZE Cnd HX Typ: 0=RTPF 1=MCHX COILTYPE Machine Control Type CTRLTYPE Enable Digital Scroll? No/Yes DIGCMPEN Dehumidification Config DHSELECT Outdoor VFD Enable No/Yes OV_ENA...
  • Page 171 APPENDIX B — CCN TABLES (cont) SERVICE-CONFIG TABLES (cont) TABLE NAME RANGE UNITS POINT NAME DEFAULT UNIT Machine Control Type 1 to 6 CTRLTYPE Fan Mode (0=auto, 1=cont) 0 to 1 FAN_MODE Remote Switch Config 0 -3 RMTINCFG CEM Module installed Yes/No CEM_BRD Temp.Cmp.Strt.Cool Factr...
  • Page 172 APPENDIX B — CCN TABLES (cont) MAINTENANCE DISPLAY TABLES (cont) TABLE DISPLAY NAME RANGE UNITS POINT NAME WRITE STATUS COMPRESR Compressor A1 Relay On/Off CMPA1 Compressor A1 Feedback On/Off CSB_A1 Curr.Sens.Brd. A1 Status ascii CSBA1ASC CSB A1 Feedback Alarm Enable/Disable CSB_A1EN config Comp A1 Locked Out ?
  • Page 173 APPENDIX B — CCN TABLES (cont) MAINTENANCE DISPLAY TABLES (cont) TABLE DISPLAY NAME RANGE UNITS POINT NAME WRITE STATUS EC_DIAG Economizer Active ? Yes/No ECACTIVE Conditions which prevent economizer being active: Econ Act. Unavailable? Yes/No ECONUNAV Remote Econ. Disabled ? Yes/No ECONDISA DBC - OAT lockout?
  • Page 174 APPENDIX B — CCN TABLES (cont) MAINTENANCE DISPLAY TABLES (cont) TABLE DISPLAY NAME RANGE UNITS POINT NAME WRITE STATUS GSINPUTS Low Ambient Setpoint 80-150 degF LASP Head Pressure Setpoint 70-150 degF HPSP HVAC Mode Numerical Form MODEHVAC Outside Air Temperature degF Cir A Sat.Suction Temp degF...
  • Page 175 APPENDIX B — CCN TABLES (cont) MAINTENANCE DISPLAY TABLES (cont) TABLE DISPLAY NAME RANGE UNITS POINT NAME WRITE STATUS MODES System Mode…………: ascii text strings HVAC Mode…………..: ascii text strings Control Mode………..: ascii text strings Currently Occupied On/Off MODEOCCP Timed Override in effect On/Off MODETOVR DCV resetting min pos...
  • Page 176 APPENDIX B — CCN TABLES (cont) MAINTENANCE DISPLAY TABLES (cont) TABLE DISPLAY NAME RANGE UNITS POINT NAME WRITE STATUS SUMZ Cooling Control Point COOLCPNT Mixed Air Temperature Evaporator Discharge Tmp Return Air Temperature Outside Air Temperature Econo Damper Current Pos ECONOPOS Capacity Threshold Adjst Z_GAIN...
  • Page 177 APPENDIX B — CCN TABLES (cont) MAINTENANCE DISPLAY TABLES (cont) TABLE DISPLAY NAME RANGE UNITS POINT NAME WRITE STATUS TESTINDP Economizer Position Test ECONCTST test Economizer Power Test ECONPTST test Calibrate the Economizer? ECON_CAL test Power Exhaust Relay A PE_A_TST test Power Exhaust Relay B PE_B_TST...

  • Page 178: Appendix C - Vfd Information

    X1-3 (AGND) Factory wired for 4 to 20 mA remote input Fig. A — VFD Wiring Table B — VFD Configurations PARAMETER GROUP PARAMETER TITLE PARAMETER INDEX CARRIER DEFAULT LANGUAGE 9901 ENGLISH APPLIC MACRO 9902 HVAC Default MOTOR CTRL MODE...
  • Page 179 A rotating blinking arrow indicates that the drive is running but not at setpoint. A stationary arrow indi- cates that the drive is stopped. For Carrier rooftop units, the correct rotation is counterclockwise. The upper right corner shows the frequency setpoint that the drive will maintain.
  • Page 180 APPENDIX C — VFD INFORMATION (cont) 2. Use the UP or DOWN keys to highlight PARAMETERS on 4. The text “Copying Parameters” will be displayed with a the display screen and press ENTER (SOFT KEY 2). progress indicator. To stop the process, select ABORT (SOFT KEY 1).
  • Page 181 APPENDIX C — VFD INFORMATION (cont) 3. Use the UP or DOWN keys to highlight CLOCK VISIBILI- • the control panel display TY and press SEL (SOFT KEY 2). This parameter is used to • the Fault Word and Alarm Word parameter bits (parame- display or hide the clock on the screen.
  • Page 182 UNDERLOAD UNDERLOAD CURVE. THERM FAIL Internal fault. The thermistor measuring the internal temperature of the drive is open or shorted. Contact Carrier. OPEX LINK Internal fault. A communication-related problem has been detected between the OMIO and OINT boards. Contact Carrier.
  • Page 183 4. Replace the cooling fan. If installed in an appropriate environment, the VFD requires 5. Restore power. very little maintenance. Table E lists the routine maintenance intervals recommended by Carrier. Table D — Alarm Codes ALARM ALARM NAME DESCRIPTION AND RECOMMENDED CORRECTIVE ACTION...
  • Page 184 If the drive is operated in a critical part of a process, fan replacement is recommended once these symptoms start appearing. Replacement fans are available from Carrier. To replace the main fan for frame sizes R1 through R4, per- form the following (see Fig. D): 1.
  • Page 185 APPENDIX C — VFD INFORMATION (cont) A48-7716 Fig. F — Internal Enclosure Fan Replacement...

  • Page 186: Appendix D - Mode Selection Process

    APPENDIX D — MODE SELECTION PROCESS The following section is to be used in conjunction with Fig. 3 — The unit is off and no operating modes are active. on page 30. To help determine why the unit controls are in a HVAC mode: ("Tempering Vent ") certain mode, the programming logic is provided below.

  • Page 187: Appendix E - Upc Open Controller

    APPENDIX E — UPC OPEN CONTROLLER The following section is used to configure the UPC Open. The UPC Open controller is mounted in a separate enclosure below the main control box. 10's To Address the UPC Open Controller The user must give the UPC Open controller an address that is unique on the BACnet network.
  • Page 188 The example in Fig. J shows the BAS Port DIP Switches set network segment to add bias and prevent signal distortions due for 76.8k (Carrier default) and MS/TP. to echoing. See Fig. H, J, and K. Set the BAS Port DIP Switches DS2 and DS1 for the appropri- To wire the UPC Open controller to the BAS network: ate communications speed of the MS/TP network (9600, 19.2k,...
  • Page 189 APPENDIX E — UPC OPEN CONTROLLER (cont) Fig. K — BT485 Terminator Installation To install a BT485 terminator, push the BT485 terminator, on alternatives. The Halar specification has a higher temperature to the BT485 connector located near the BACnet connector. rating and a tougher outer jacket than the SmokeGard specifi- cation, and it is appropriate for use in applications where the...
  • Page 190 APPENDIX E — UPC OPEN CONTROLLER (cont) Table I — Open System Wiring Specifications and Recommended Vendors WIRING SPECIFICATIONS RECOMMENDED VENDORS AND PART NUMBERS Connect Air Contractors Wire Type Description Belden RMCORP International Wire and Cable 22 AWG, single twisted shielded pair, low capacitance, CL2P, TC foam FEP, plenum rated.
  • Page 191 The UPC Open device and ComfortLink controls must be set to If there are problems wiring or addressing the UPC Open con- the same CCN Address (Element) number and CCN Bus num- troller, contact Carrier Technical Support. ber. The factory default settings for CCN Element and CCN COMMUNICATION LEDS Bus number are 1 and 0 respectively.
  • Page 192 APPENDIX E — UPC OPEN CONTROLLER (cont) NETWORK POINTS LIST NAME READ/WRITE UNITS RANGE OBJECT NAME OBJECT ID "0=NOT ACTIVE a_link_status_1 BV:2601 AIRSIDE LINKAGE STATUS 1=ACTIVE" 0 to 5000 link_iaq_1 AV:2607 (AIRSIDE LINKAGE) INDOOR AIR QUALITY 0 to 100 link_max_dmpr_1 AV:2611 (AIRSIDE LINKAGE) MAX DAMPER POSITION 0 to 100...
  • Page 193 APPENDIX E — UPC OPEN CONTROLLER (cont) NETWORK POINTS LIST (CONT) NAME READ/WRITE UNITS RANGE OBJECT NAME OBJECT ID "0=OFF schedule_1 BV:5 LOCAL SCHEDULE 1=ON" ma_temp_1 AV:1500 MIXED AIR TEMPERATURE °F 0 to 5000 oaq_1 AV:113 OAQ - PPM OUTDOOR CO2 no unit occl_end_1 AV:114...
  • Page 194 APPENDIX E — UPC OPEN CONTROLLER (cont) NETWORK POINTS LIST (CONT) NAME READ/WRITE UNITS RANGE OBJECT NAME OBJECT ID VENT REHEAT SETPOINT °F 55 to 95 dhvht_sp_1 AV:184 VENT REHEAT SETPT SELECT no unit 0 to 1 dhvhtcfg_1 AV:185 USER DEFINED ANALOG 1 no unit user_analog_1_1 AV:2901...
  • Page 195 APPENDIX E — UPC OPEN CONTROLLER (cont) NETWORK POINTS LIST (CONT) NAME READ/WRITE UNITS RANGE OBJECT NAME OBJECT ID "0=OFF user_binary_18_1 BV:2928 USER DEFINED BINARY 18 1=ON" "0=OFF user_binary_19_1 BV:2929 USER DEFINED BINARY 19 1=ON" "0=OFF user_binary_20_1 BV:2930 USER DEFINED BINARY 20 1=ON"...

  • Page 196: Low Ambient Motormaster V Control

    ® APPENDIX F — OPTIONAL FACTORY-INSTALLED LOW AMBIENT MOTORMASTER V CONTROL This appendix contains instructions for the start-up and service is the saturated condensing temperature for refrigeration Cir- cuit B. There are a total of up to 6 condenser fans (depending of the optional low ambient Motormaster ®...
  • Page 197 ® APPENDIX F — OPTIONAL FACTORY-INSTALLED LOW AMBIENT MOTORMASTER V CONTROL (cont) Fig. N — Low Ambient MMV Control Location — 48/50A040-050 Units...
  • Page 198 ® APPENDIX F — OPTIONAL FACTORY-INSTALLED LOW AMBIENT MOTORMASTER V CONTROL (cont) Fig. O — Low Ambient MMV Control Location — 48/50A060 RTPF Units...
  • Page 199 ® APPENDIX F — OPTIONAL FACTORY-INSTALLED LOW AMBIENT MOTORMASTER V CONTROL (cont) Fig. P — Low Ambient MMV Control Location — 48/50A060 MCHX Units ® Configure Motormaster V Control Test Motormaster V Control The Motormaster V control is configured for proportional inte- To test the control and motor in the test mode, run compressor gral (PI) control mode.

  • Page 200: Appendix F - Optional Factory-Installed

    ® APPENDIX F — OPTIONAL FACTORY-INSTALLED LOW AMBIENT MOTORMASTER V CONTROL (cont)   Unit size (Configuration UNIT SIZE), refrigerant type HPSP+MMSPFOST. This setpoint will be used by both the A and   (Configuration UNIT RFG.T), and condenser heat ex- B circuits.
  • Page 201 It is strongly recommended that the user NOT change any programming without consulting Carrier service personnel. When a circuit A compressor has been commanded on, then Mo- Unit damage may occur from improper.
  • Page 202 ® APPENDIX F — OPTIONAL FACTORY-INSTALLED LOW AMBIENT MOTORMASTER V CONTROL (cont) 4. Restore factory defaults by changing the value in P48 using 6. Change the value of P48 to the desired factory default mode UP and DOWN buttons and then storing the value by press- using UP and DOWN buttons then press MODE.
  • Page 203 ® APPENDIX F — OPTIONAL FACTORY-INSTALLED LOW AMBIENT MOTORMASTER V CONTROL (cont) • P54: LOAD - in percent of drives rated output current TROUBLESHOOTING • P55: VDC INPUT - in percent of maximum input: 100% Troubleshooting the Motormaster V control requires a combina- will indicate full scale which is 5 v tion of observing system operation and VFD display information.
  • Page 204 MODE 2 MODE 4 Line Voltage: 01 = low line, 02 = high line Carrier Freq: 01 = 4 kHz, 02 = 6 kHz, 03 = 8 kHz Startup mode: flying restart Stop mode: coast to stop Standard Speed source: 01 = keypad, 04 = 4 to 20mA (NO PI), 05 = R22 or R410A, 06 = R134a...
  • Page 205 Manual Consult factory. problem Restore factory defaults by tog- gling P48 to another mode. Then User data and Carrier defaults in set P48 to desired mode to restore Data Fault Manual the EPM are corrupted. all defaults for that mode. See Drive Programming section.

  • Page 206: Ambient Control

    ® APPENDIX G — OPTIONAL GREENSPEED /LOW AMBIENT CONTROL This appendix contains instructions for the start-up and service (SCTs) as the feedback information to the condenser fans (also re- of the optional Greenspeed/low ambient control on 48/ ferred to as 'outdoor fans'). SCT.A is the saturated condensing 50A020-060 units.

  • Page 207: Appendix G - Optional Greenspeed/Low

    APPENDIX G — OPTIONAL GREENSPEED/LOW AMBIENT CONTROL (cont) Fig. S — Greenspeed/Low Ambient VFD Control Location — 48/50A040-050 Units...
  • Page 208 APPENDIX G — OPTIONAL GREENSPEED/LOW AMBIENT CONTROL (cont) Fig. T — Greenspeed/Low Ambient VFD Control Location — 48/50A060 Units There are configurations provided for head pressure and low Configure Greenspeed/Low Ambient Control ambient control that can be found at the local display under The Greenspeed/low ambient control is configured for propor- ...
  • Page 209 APPENDIX G — OPTIONAL GREENSPEED/LOW AMBIENT CONTROL (cont) Outdoor VFD PI Run Rate (OV.RR) Condenser Fan Staging [OV_RATE] This is the number of seconds between execution For 48/50A020-035 size units, there are two outdoor fans that of the Greenspeed/low ambient ComfortLink PD routine. This are common to both refrigerant circuits.
  • Page 210 UNIT DAMAGE HAZARD 10(GND) It is strongly recommended that the user NOT change any Factory-supplied jumper 12 (COMMON) programming without consulting Carrier service personnel. 9 (24 VDC) Run (factory-supplied jumper) Unit damage may occur from improper programming. 11 (DI-1) 9 (24 VDC) Start Enable 1 (factory-supplied jumper).
  • Page 211 APPENDIX G — OPTIONAL GREENSPEED/LOW AMBIENT CONTROL (cont) Table Q — ACS320 VFD Greenspeed Parameters Tables, Part 2 ABB ACS320 VFD LOOKUP VARIABLE 48EJ000340-DATA 48EJ000339-DATA 48EJ000330-DATA 48EJ000358-DATA 48EJ000380-DATA 48EJ000377-DATA PARAMETER ID : 48EJ000340 48EJ000339 48EJ000330 48EJ000358 48EJ000380 48EJ000377 00PG000007210A HD52AR381 HD52AR465 HD52AR465 00PG000007208A...
  • Page 212 APPENDIX G — OPTIONAL GREENSPEED/LOW AMBIENT CONTROL (cont) Table R — ACH550 VFD Greenspeed Parameters Tables LOOKUP VARIABLE ABB ACH550 VFD Parameter ID : 48EJ000328-DATA 48EJ000356-DATA 48EJ000378-DATA 48EJ000375-DATA 48EJ000328 48EJ000356 48EJ000378 48EJ000375 Motor Part Number HD52AR578 HD52AR578 00PG000007209A HD52AR578 VFD Part Number HK30WA361 HK30WA361 HK30WA361...
  • Page 213 APPENDIX G — OPTIONAL GREENSPEED/LOW AMBIENT CONTROL (cont) Table S — ACS320 VFD Low Ambient Parameters Tables, Part 1 ABB ACS320 VFD LOOKUP VARIABLE 48EJ000491-DATA 48EJ000497-DATA 48EJ000379-DATA 48EJ000500-DATA 48EJ000493-DATA 48EJ000494-DATA PARAMETER ID : 48EJ000491 48EJ000497 48EJ000379 48EJ000500 48EJ000493 48EJ000494 Motor Part Number HD52AK002 HD52AK002 00PG000007207A...
  • Page 214 APPENDIX G — OPTIONAL GREENSPEED/LOW AMBIENT CONTROL (cont) Table T — ACS320 VFD Low Ambient Parameters Tables, Part 2 ABB ACS320 VFD LOOKUP VARIABLE 48EJ000340-DATA 48EJ000495-DATA 48EJ000492-DATA 48EJ000498-DATA 48EJ000380-DATA 48EJ000501-DATA PARAMETER ID : 48EJ000340 48EJ000495 48EJ000492 48EJ000498 48EJ000380 48EJ000501 Motor Part Number 00PG000007210A HD52AR382 HD52AK002...
  • Page 215 APPENDIX G — OPTIONAL GREENSPEED/LOW AMBIENT CONTROL (cont) Table U — ACH550 VFD Low Ambient Parameters Tables LOOKUP VARIABLE ABB ACH550 VFD Parameter ID : 48EJ000490-DATA 48EJ000496-DATA 48EJ000378-DATA 48EJ000499-DATA 48EJ000490 48EJ000496 48EJ000378 48EJ000499 Motor Part Number HD52GE577 HD52GE577 00PG000007209A HD52GE577 VFD Part Number HK30WA361 HK30WA361...
  • Page 216 A rotating blinking arrow indicates that the mode. drive is running but not at setpoint. A stationary arrow indi- cates that the drive is stopped. For Carrier rooftop units, the DRIVE PARAMETER BACKUP MODE correct rotation is counterclockwise.
  • Page 217 APPENDIX G — OPTIONAL GREENSPEED/LOW AMBIENT CONTROL (cont) Download All Parameters 5. Use the UP or DOWN keys to highlight TIME FORMAT and press SEL (SOFT KEY 2). Use the UP or DOWN keys To download all parameters from the control panel to the VFD, to change the parameter setting.
  • Page 218 CONFIGURATION OVERRIDE HAZARD advising return for repair. DO NOT USE ABB OR CARRIER START-UP ASSIS- CONTROL PANEL CLEANING TANT ON THIS VFD APPLICATION! Use of start-up Use a soft damp cloth to clean the control panel. Avoid harsh assistant will override the factory VFD configurations! cleaners which could scratch the display window.
  • Page 219 UNDERLOAD CURVE. THERM FAIL Internal fault. The thermistor measuring the internal temperature of the drive is open or shorted. Contact Carrier. OPEX LINK Internal fault. A communication-related problem has been detected between the OMIO and OINT boards. Contact Carrier. OPEX PWR Internal fault.
  • Page 220 In a normal environment check the heat Table X lists the routine maintenance intervals recommended sink annually, in a dusty environment check more often. by Carrier. Use the following procedure to clean the heat sink on AHC550 Table X — Maintenance Intervals VFDs: Turn off and lock out unit power.
  • Page 221 APPENDIX G — OPTIONAL GREENSPEED/LOW AMBIENT CONTROL (cont) Use the following procedure to clean the heat sink on ASC320 VFDs: Turn off and lock out unit power. Insert a small straight blade screwdriver into the slot and press in to release the top cover as shown in Fig. Y. Blow clean compressed air (not humid) from top of ASC320 while simultaneously using a vacuum cleaner at the base to trap the dust.

  • Page 222: Index

    Supply fan status monitoring logic Building pressure configuration Heat mode diagnostic help System modes Building pressure control Heat mode selection process Temperature compensated start Heating Temperature compensated start Carrier Comfort Network ® (CCN) logic System Heating control Thermistor troubleshooting CCN tables and display Humidi-MiZer...

  • Page 223: Controls Setpoint And Configuration Log

    CONTROLS SETPOINT AND CONFIGURATION LOG MODEL NUMBER: Software Version SERIAL NUMBER: CESR131343-- DATE: CESR131249-- TECHNICIAN: CESR131465- NAVI CESR131227-- CESR131226-- CESR131174-- MARQ CESR131171-- ITEM EXPANSION RANGE DEFAULT ENTRY UNIT UNIT CONFIGURATION C.TYP Machine Control Type 1 to 6 (multi-text strings) CV.FN Fan Mode (0=Auto, 1=Cont) 0 to 1 (multi-text strings) RM.CF...
  • Page 224 ITEM EXPANSION RANGE DEFAULT ENTRY COOL (cont) COOLING CONFIGURATION A1.EN Enable Compressor A1 Enable/Disable Enable A2.EN Enable Compressor A2 Enable/Disable Enable B1.EN Enable Compressor B1 Enable/Disable Enable B2.EN Enable Compressor B2 Enable/Disable Enable CS.A1 CSB A1 Feedback Alarm Enable/Disable Enable CS.A2 CSB A2 Feedback Alarm Enable/Disable...
  • Page 225 ITEM EXPANSION RANGE DEFAULT ENTRY SP (cont) SUPPLY STATIC PRESS.CFG. SP.I Static Pressure Intg. Gain 0 to 50 SP.D Static Pressure Derv. Gain 0 to 50 SP.SG Static Press.System Gain 0 to 50 ECON ECONOMIZER CONFIGURATION EC.EN Economizer Installed? Yes/No EC.MN Economizer Min.Position 0 to 100 %...
  • Page 226 ITEM EXPANSION RANGE DEFAULT ENTRY D.LV.T COOL/HEAT SETPT. OFFSETS L.H.ON Dmd Level Lo Heat On –1 to 2 ^F H.H.ON Dmd Level(+) Hi Heat On 0.5 to 20.0 ^F L.H.OF Dmd Level(-) Lo Heat Off 0.5 to 2 ^F L.C.ON Dmd Level Lo Cool On –1 to 2 ^F...
  • Page 227 ITEM EXPANSION RANGE DEFAULT ENTRY BROD CCN BROADCST DEFINITIONS TM.DT CCN Time/Date Broadcast ON/OFF OAT.B CCN OAT Broadcast ON/OFF ORH.B CCN OARH Broadcast ON/OFF OAQ.B CCN OAQ Broadcast ON/OFF G.S.B Global Schedule Broadcst ON/OFF B.ACK CCN Broadcast Ack'er ON/OFF SC.OV CCN SCHEDULES-OVERRIDES SCH.N Schedule Number...
  • Page 228 © 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. 04-53480239-01 Printed in U.S.A. Form 48/50A-14T Pg 228 6-19A 5-19 Replaces: 48/50A-13T...

  • Page 229: Form 48/50A-14T Pg

    UNIT START-UP CHECKLIST NOTE: To avoid injury to personnel and damage to equipment or property 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 preced- ing sections of this Controls, Start-Up, Operation, Service, and Troubleshooting document.
  • Page 230 CIRCUIT NO. 2 __________ PSIG CIRCUIT NO. 2 __________ PSIG  VERIFY REFRIGERANT CHARGE. © 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. 04-53480239-01 Printed in U.S.A.

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