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Carrier /50HC 04-28, Controls, Start-Up, Operation And Troubleshooting, Page: 42 / 144

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Carrier /50HC 04-28 Controls, Start-Up, Operation And Troubleshooting Download Page 42

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• If outdoor-air temperature is less than the Compressor

Lockout Temperature (

CA.LO

, 

CB.LO

) configuration val-

ue, unit ca not cool.

• If outdoor-air temperature is greater than the Heating

Lockout Temperature (

HT.LO

) configuration value, unit

cannot heat.

Restart Procedure

Before attempting to restart the machine, check the alarm list

to determine the cause of the shut down. If the shutdown alarm

for a particular control function has occurred, determine and

correct the cause before allowing the unit to run under its own

control again. When there is problem, the unit should be diag-

nosed in Service Test mode. The alarms must be reset before

the control function can operate in either Normal mode or Ser-

vice Test mode.

Alarms and Alerts

VIEWING AND CLEARING UNIT ALARMS
Presence of active alarms will be indicated on the scrolling

marquee display by the Alarm Status light turning on and by

the number of active alarms being displayed in the automatic

View of Run Status. Presence of active alarms may also be sig-

naled on the Alarm Output terminals. Each alarm may also be

broadcast on the CCN network. Active alarms and past alarm

history can be reviewed and cleared via the local display or a

CCN device. The following menu locations are used for the lo-

cal display:

Alarms

R.CURR (Reset All Current Alarms)

Change to YES to reset all active alarms. Turning unit power

off will also reset all current alarms.

Alarms

R.HIST (Reset Alarm History)

Change to YES to reset the alarm history. Turning unit power

off will not reset the alarm history.

Alarms

CURR (Currently Active Alarms)

Use the ENTER key, then scroll through any alarm numbers

using the up and down arrow keys. Alarms are displayed in nu-

merical order.

Alarms

HIST (Alarm History)

Use the ENTER key, then scroll through any alarm numbers

using the up and down arrow keys. Up to 20 alarms are dis-

played in order of occurrence, with time and date.
The description for an alarm can be viewed on the scrolling

marquee display by pressing ESCAPE and ENTER keys si-

multaneously while displaying the alarm code number. Be sure

to expand description for each code, because in some cases

there are different possible descriptions and causes for the

same code number.
DIAGNOSTIC ALARM CODES AND POSSIBLE CAUSES

Alert Codes T051 and T055 (without Current Sensors)

These alerts can only be activated if set to Diagnose Compressor

Safety (

Configuration

COOL

D.CMP = Yes

). There are 4

different texts for each alert code. There are two different alerts

which have corresponding test mode alerts indicated with “Ser-

vice Test” in the expanded text. Pressing enter and esc on the

scrolling marquee or Navigator display to expand the T051 and

T055 alert will show you one of the below alerts. Make sure the

expanded text is read correctly before troubleshooting. Alert

codes T051 and T055 are for compressors A1 and B1 respective-

ly.

• Compressor Safety Trip

These alerts occur when the respective compressor has been

running for 25 sec and the Saturated Suction Pressure (

Pres-

sures

SSP.A or SSP.B

) reflects a change in compressor opera-

tion. A change in compressor operation is when the SSP chang-

es more than the Maximum Suction Change configuration

(

Configuration

COOL

MX.SA or MX.SB

) in a two second

window while running the compressor and persists for 40 sec-

onds. This alert can also occur when the respective compressor

is diagnosed with a high pressure switch trip. A high pressure

trip is when the compressor suction rises and falls two times

within 2 minutes.
When this occurs, the control turns off the compressor and logs

a strike for the respective circuit. These alerts reset automati-

cally. The possible causes are: high-pressure switch (HPS)

open, Condensate overflow switch (COFS) open, compressor

internal protection is open, or a wiring error (a wiring error

might not allow the compressor to start). The HPS and optional

COFS are wired in series with compressor relays on the MBB.

If one of these opens during compressor operation, the com-

pressor stops causing the control to activate this alert.

• Compressor Detected After Turnoff

These alerts occur when the respective compressor is turned

off but the Saturated Suction Pressure (

Pressures

SSP.A or

SSP.B

) does not reflect a shutdown. When shutting down a

compressor suction pressure must rise more than Maximum

Suction Change configuration (

Configuration

COOL

MX.SA

 or 

MX.SB

) within the first 10 seconds and stay above

it. When this occurs, the control turns off all of the compressor

relays, stays in cooling mode and keeps the indoor fan on. Use

the scrolling marquee to reset the alert. The possible causes are

a welded contactor, frozen compressor relay on MBB, or ad-

verse conditions.

Alert Codes T051 and T055 (with Current Sensors)

These alerts can only be activated if Current Sensing A1 or B1 is

enabled (

Configuration

COOL

CS.A1

 or 

CS.B1 = En-

abled

). There are 4 different texts for each alert code. There are

two different alerts which have corresponding test mode alerts

indicated with “Service Test” in the expanded text. Pressing en-

ter and esc on the scrolling marquee or Navigator display to ex-

pand the T051 and T055 alert will show you one of the below

alerts. Make sure the expanded text is read correctly before trou-

bleshooting. Alert codes T051 and T055 for compressors A1 and

B1 respectively.

• Compressor Safety Trip

These alerts occur when the Current Sensor (CS) does not de-

tect compressor current during compressor operation. When

this occurs, the control turns off the compressor and logs a

strike for the respective circuit. These alerts reset automatical-

ly. The possible causes are: high-pressure switch (HPS) open,

Condensate overflow switch (COFS) open, compressor inter-

nal protection is open, or a wiring error (a wiring error might

not allow the compressor to start). The HPS and optional

COFS are wired in series with compressor relays on the MBB.

If one of these opens during compressor operation, the com-

pressor stops causing the control to activate this alert.

• Compressor Detected After Turnoff

These alerts occur when the Current Sensor (CS) detects cur-

rent when the compressor should be off. When this occurs, the

control turns off all of the compressor relays, stays in cooling

mode and keeps the indoor fan on. Use the scrolling marquee

to reset the alert. The possible causes are a welded contactor,

frozen compressor relay on MBB, or adverse conditions.

Alert Codes T064 and T065 — Circuit Saturated Condensing 

Temp Thermistor Failure

Alert codes T064 and T065 are for circuits A and B respective-

ly. These alerts occur when the temperature is outside the range

–40 to 240°F (–40 to 116°C). The cause of the alert is usually a

faulty thermistor, a shorted or open thermistor caused by a wir-

ing error, or a loose connection.

Alert Code T066 and T067 — Circuit Saturated Suction Tem-

perature Thermistor Failure

Alert codes T066 and T067 are for circuits A and B respective-

ly. These alerts occur when the unit’s suction transducers are

Summary of Contents for /50HC 04-28

Page 1: ...oint and Configuration Log 11 Thermostat Control 11 Space Temperature Sensor Control Direct Wired T 55 or T 56 or T 59 11 T 58 Communicating Room Sensor 12 CCN Linkage Control 12 System Pilot Communication Space Sensor 12 Thermidistat Control 12 Space Humidistat Control 12 Relative Humidity Sensor Control 12 CCN Communication 12 Accessories 12 ECONOMIZER POWER EXHAUST ELECTRIC HEAT FIRE SHUTDOWN O...

Page 2: ...Transducer Troubleshooting 63 Forcing Inputs and Outputs 63 Troubleshooting Units Equipped with EnergyX System 66 COMPLETE ERV STOPPAGE CHECK ALARMS T418 OAU Filter Dirty 66 T418 OAU MOTOR FAILURE T418 OAU LOW CFM T418 OAU GENERAL ALARM Check Diagnostic LEDs 67 Communication Failures 68 COMM FAILURE1 UPC TO LEN FAIL COMM FAILURE2 UPC TO EXCB FAIL On Board Pressure Transducers 68 MAJOR SYSTEM COMPO...

Page 3: ...ol DANGER identifies the most serious hazards which will result in severe personal injury or death WARNING signifies hazards which could result in personal injury or death CAUTION is used to identify unsafe practices which may result in minor personal injury or product and property damage NOTE is used to highlight suggestions which will result in enhanced installation reliability or operation IMPO...

Page 4: ...rolling marquee display is a 4 key 4 character 16 segment LED light emitting diode display module The display also con tains an Alarm Status LED See Fig 1 The display is easy to operate using 4 buttons and a group of 11 LEDs that indicate the following menu structures Run Status Service Test Temperatures Pressures Set points Inputs Outputs Configuration Timeclock Operating Modes Alarms Through the...

Page 5: ...lash showing the item followed by the item value and then followed by the item units if any Items in the Configuration and Service Test modes are pass word protected The display will flash PASS and WORD when Table 2 Scrolling Marquee Mode and Menu Display Structure RUN STATUS SERVICE TEST TEMPERATURES PRESSURES SETPOINTS INPUTS OUTPUTS CONFIGURATION TIME CLOCK OPERATING MODES ALARMS Auto View of R...

Page 6: ...e the System Pilot device to change set points A security feature is provided to limit access of features for unau thorized users See Fig 3 for System Pilot device details CCN Tables and Display In addition to the unit mounted scrolling marquee display the user can also access the same information through the CCN ta bles by using the Service tool or other CCN programs devices The variable names us...

Page 7: ...mine whether or not compressors are rotating in the proper direction use a phase rotation meter on the unit input power to check for L1 L2 L3 or clockwise rotation or use the Service Test mode to energize a compressor If the compressor is rotating in the wrong direction the controls will stop the compressor and dis play alarm for Circuit x Failure to Pressurize where x is the corresponding A or B ...

Page 8: ...om an air balance report to configure the Indoor Fan Max Speed CFM IDF C If an air balance report is not available then use the fan tables to determine Fan Max Speed CFM IDF C When using the fan tables to determine Fan Max Speed CFM IDF C set Economizer Position Test Service Test INDP ECON to 0 Economizer Damper Closed and Indoor Fan Speed Test Service Test FANS F SPD equal to Supply Fan Maxi mum ...

Page 9: ...r Locations 48HC 17 Unit Shown INDOOR BLOWER ACCESS PANEL CONTROL BOX ACCESS PANEL GAS SECTION ACCESS PANEL INDOOR COIL ACCESS PANEL FILTER ACCESS PANEL UNIT BACK UNIT FRONT OUTDOOR AIR SCREEN HIDDEN CONTROL BOX ACCESS PANEL FILTER AND INDOOR COIL ACCESS PANEL INDOOR BLOWER ACCESS PANEL GAS SECTION ACCESS PANEL ...

Page 10: ...Save the checklist for future service and maintenance use It is recommended that a copy of the checklist be left with the unit in the literature slot on the base unit control box access door ERV TEST MODE ERV Test points should be used when starting up an EnergyX unit to verify proper ERV component operation It can also be used for troubleshooting To test the ERV use the scrolling marquee to put t...

Page 11: ...re quire changes to default configuration values See the CCN and Display parameter tables and other sections of these in structions for more details Refer to the Major System Compo nents or accessory installation instructions for specific wiring detail Control Set Point and Configuration Log During start up accessory installation and equipment service set points and or configuration changes might ...

Page 12: ...he humidistat input is provided on the field connection terminal board The Space Humidity Switch configuration Configura tion UNIT RH SW identifies the normally open or normal ly closed status of this input at HIGH humidity Relative Humidity Sensor Control For units with the factory installed Humidi MiZer option and the economizer option with the ECB economizer control board the humidity sensor in...

Page 13: ...n enabled the user will be prompted to 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 always occupied and the unit will control to its occupied set points A value of 1 means the unit will follow a local schedule and a value of 65 to 99 means it will follow a CCN schedule Schedules 2 64 are not used as the control only supports...

Page 14: ...eriod Unoccupied Time Item Value Units scrolls again B MON 1 NO Monday In Period ENTER NO Scrolling stops Y YES Select YES ENTER YES Change accepted ESCAPE MON 1 YES Monday In Period Item Value Units scrolls again B TUE 1 NO Tuesday In Period ENTER NO Scrolling stops Y YES Select YES ENTER YES Change accepted ESCAPE TUE 1 YES Tuesday In Period Item Value Units scrolls again B WED 1 NO Wednesday In...

Page 15: ...ans are controlled normally to maintain proper unit operation If LEN VFD fan is configured then the indoor fan speed will default to the Mech Cooling Fan Speed configuration point Configuration I FAN FS CL when one compressor is turned on The Reduced Cool Fan Speed F SPD can only be changed while one stage is run ning If more then one stage is on the actual fan speed will be 100 F SPD shows the re...

Page 16: ...ion terminal board The IAQ Analog Input configuration Configuration AIR Q IA CF will have to set to 3 Control Minimum Position When IA CF 3 an external 4 to 20 mA source is used to move the damper 0 to 100 directly IAQ 4 20mA signal COM 4 20mA common NOTE In this mode preset minimum positions configurations are not valid the damper position may exceed the input posi tion to provide economizer cool...

Page 17: ...hat defines three main states of the control system Disabled Enabled or Test The HVAC Mode is the next level that defines four main states of functional operation Disabled Fan Only Cool and Heat The Occupied status affects set points for cooling and heating in Space Sensor control mode and operation of the economizer for indoor air quality ventilation and free cooling The Unit Control Type Configu...

Page 18: ...cupied Cool Set point Setpoints OCSP and the Occupied Heat Setpoint Setpoints OHSP are active When the building is in unoc cupied mode the Unoccupied Cool Setpoint Set points UCSP and the Unoccupied Heat Setpoint Set points UHSP are active The heating and cooling set points are also separated by a Heat Cool Set Point Gap Set points GAP that is user configurable from 2 to 10 degrees F This paramete...

Page 19: ... Gas Heat Configura tion HEAT FOD G Staged Air Volume SAV Units FTYP LEN VFD The SAV option is a new method of controlling the supply fan in a typical constant volume rooftop unit This control method employs a Variable Frequency Drive VFD to operate the sup ply fan at different speeds in order to achieve energy savings through reduced fan power This method is specifically not concerned with contro...

Page 20: ...peed driver commands something different CONSTANT VOLUME CV UNITS FTYP 1 SPEED Single speed fan units are controlled by the Indoor Fan Relay 1 Outputs FANS IDF 1 on the main base board MBB which then operates the indoor fan contactor IFC The fan will be either on or off depending on the unit control type and the conditions above Thermostat Control In thermostat mode the IDF relay will be on in the...

Page 21: ...s to anticipate the change in the space because of its current stage status This an ticipation is based on the Supply Air Trend Operating Modes COOL SA TR and the Cool Demand Trend Oper ating Modes COOL TRD C These trends will show the control how the space is reacting to the current running condi tions and help it decide when to add or remove one stage from the requested stages The Cool Stage Inc...

Page 22: ...TROL Once the unit is in a heating mode it must decide what the de mand is and how to satisfy Based on the unit control configura tion requested heating stages Run Status HEAT REQ H will be determined then passed to heat control to actually add the heating stages Thermostat Control There are two ways of requesting stages when thermostat con trol is enabled Traditional Thermostat control or Adaptiv...

Page 23: ...tage of the main gas valve If both stage 1 and stage 2 of the gas valve close gas will be turned off to the main burners Economizer If an economizer is installed then Economizer Installed Con figuration ECON EC EN should be set to YES The economizer damper is controlled by the Econo Commanded Position Configuration ECON EC CP on the Economiz er Control Board ECB Feed back from the economizer actu ...

Page 24: ...ically disconnected Range 10 20 Default 10 S CHG T24SATMD T24 Econ Move SAT Change minimum amount in degrees F SAT is expected to change based on economizer position change of T24ECSTS Range 0 5 Default 2 E SOD T24SRATDF T24 Econ RAT OAT Diff mini mum difference in degrees F between RAT if available or SAT with economizer closed and fan on and OAT to perform mechanically disconnected actuator test...

Page 25: ...O2 sensors for addi tional indoor air quality control When unit is equipped with a re turn duct CO2 sensor or return duct CO2 sensor and outside air CO2 sensor the Economizer minimum position will be recalculat ed based on the CO2 level of the return and or outside air On SAV units the fan speed will also be used in recalculating mini mum position as shown in Fig 7 When the Commanded Fan Speed F S...

Page 26: ...attempts to maintain the building space half way between the Occupied Cool Set Point Setpoints OCSP and Occupied Heat Set Point Set points OHSP using only the economizer when the condi tions in the building and the outdoors are suitable during unoc cupied periods Three different configurations define this algo rithm Unoccupied Free Cooling Configuration ECON UEFC Free Cooling Preoccupancy Time Con...

Page 27: ...urable amount This amount is referred to as AQ Dif ferential Low Configuration AIR Q AQD L When the differential between IAQ and OAQ reaches AQ Differential High Configuration AIR Q AQD H the economizer po sition will be at the Econ Min at Max Fan Speed MP MX when the indoor fan speed is at Supply Fan Maximum Speed FS MX When the IAQ OAQ differential is between AQ Dif ferential Low AQD L and AQ Di...

Page 28: ... the indoor fan whenever the building is occupied and IAQ OAQ differential is greater than the Fan On AQ Differential Configura tion AIR Q DF ON The indoor fan will turn off when the IAQ OAQ differential is less than the Fan Off AQ Differential Configuration AIR Q DF OF IA FN 2 Always The indoor fan operation for IA FN 2 is the same as the op eration when IA FN 1 except the algorithm is not limite...

Page 29: ...he normally open Cooling Liquid Valve CLV x to the expansion device Reheat Liquid Valve RLV x and Reheat Discharge Valve RDV x are closed See Fig 9 For 48 50HC14 28 units refrigerant flows from the outdoor condenser through the de energized 3 way Liquid Diverter Valve LDV x to the expansion device Reheat Discharge Valve RDV x is closed See Fig 10 Reheat 1 Subcooling Mode This mode increases latent...

Page 30: ...HC 14 28 COMP L I O C R E Z I M I D I M U H L I O C D N O C EVAP COIL INDOOR ENTERING AIR METERING DEVICE RLV x RDV x OUTDOOR AIR CLOSED VALVE OPEN VALVE CLV x COMP L I O C R E Z I M I D I M U H L I O C D N O C EVAP COIL INDOOR ENTERING AIR METERING DEVICE LDV x RDV x OUTDOOR AIR CLOSED VALVE OPEN VALVE 3 WAY VALVE ...

Page 31: ...48 50HC 14 28 COMP L I O C R E Z I M I D I M U H L I O C D N O C EVAP COIL INDOOR ENTERING AIR METERING DEVICE RLV x RDV x OUTDOOR AIR CLOSED VALVE OPEN VALVE CLV x COMP L I O C R E Z I M I D I M U H L I O C D N O C EVAP COIL INDOOR ENTERING AIR METERING DEVICE LDV x RDV x OUTDOOR AIR CLOSED VALVE OPEN VALVE 3 WAY VALVE ...

Page 32: ...tem 48 50HC 14 28 COMP L I O C R E Z I M I D I M U H L I O C D N O C EVAP COIL INDOOR ENTERING AIR METERING DEVICE RLV x RDV x OUTDOOR AIR CLOSED VALVE OPEN VALVE CLV x COMP L I O C R E Z I M I D I M U H L I O C D N O C EVAP COIL INDOOR ENTERING AIR METERING DEVICE LDV x RDV x OUTDOOR AIR CLOSED VALVE OPEN VALVE 3 WAY VALVE ...

Page 33: ... Additional diagnostic help including sta tus of circuit reheat temperature limit lockouts may be viewed within the Humidi MiZer sub menu of the cooling mode diag nostic table at Operating Modes COOL HMZR The Service Test mode may be used to force the system to op erate in various stages of Reheat1 or Reheat2 mode or to inde pendently operate the reheat valve control outputs The following forced o...

Page 34: ... is broadcasting the time on the bus it is possible to accept the time yet not accept the global holiday from the broadcast message Override Time Limit SCH O OV TL This configuration allows the user to decide how long an over ride occurs when it is initiated The override may be config ured from 1 to 4 hours If the time is set to 0 the override func tion will become disabled Timed Override Hours SC...

Page 35: ... not affect the operation of the unit in any manner An alert can also cause a strike A strik ing alert will cause the circuit to shut down for 15 minutes This feature reduces the likelihood of false alarms causing a properly working system to be shut down incorrectly If three strikes occur before the circuit has an opportunity to show that it can function properly the circuit will strike out causi...

Page 36: ... cooling IAQ IAQ IAQ Level sensor xxxx Space CO2 sensor level PPM IAQIN IAQ S IAQ Level switch Low High Determine if CO2 is high or low SAT SAT Supply Air Temperature xxx x F RTU supply air temp OA_TEMP OAT Outdoor Air Temperature xxx x F RTU Outdoor Temp SPACE_T SPT Space Temperature xxx x F Building Space Air Temp RETURN_T RAT Return Air Temperature xxx x F Building Return Air Temp PE_1 PE 1 Pow...

Page 37: ...the OAU s wheel is a modulating one MINOACFM OA MN Minimum Outside Air CFM 0 to 32000 CFM 375 04 800 0506 1000 07 2500 08 12 3000 14 4000 17 20 5000 24 28 Sets Design OA CFM for ventilation MINDCVSP DCV M Min DCV Outside Air CFM 0 to 32000 CFM 100 04 250 05 06 600 07 1000 08 12 1500 14 24 2000 24 28 Sets absolute minimum OA CFM for ventilation PEX_CTL PEX C Power Exhaust Control 0 offset CFM 1 BP ...

Page 38: ...FM being exhausted CMDOACFM C OA Command Outside Air CFM 0 to 32000 CFM Commanded CFM to bring in CMDEXCFM C EX Command Exhaust Air CFM 0 to 32000 CFM Commanded CFM to exhaust OAU_LAT LAT OAU Leaving Air Temp xxx x F Air temperature leaving the ERV RTU intake OAU_EXAT EXAT OAU Exhaust Air Temp xxx x F Air Temperature leaving the ERV exhaust OAU_BP BP Building Pressure 0 25 to 0 25 in H2O Current b...

Page 39: ...d on CO2 values and setpoints Occupied also means being in the unoccupied period but configured to run NO YES Is there frost on the wheel YES NO Is unit occupied and IDF on NO YES ERV Mode OFF Wheel off ERV 2POS Damper Closed OA CFM 0 Ex CFM 0 ERV Mode Test User sets ERV to desired values for testing purposes OAU OA Fan Speed Test OA OF OAU PE Fan Speed Test OA XF OAU 2 position Damper Test OA DM ...

Page 40: ...the required offset CFM Refer to Exhaust Control for details on determining offset CFM Defrost Mode OA OP 4 Defrost Mode is only available when the optional Frost Protec tion is factory installed in the ERV The ERV will be set to de frost mode any time the ERV wheel is running and frost is de tected on the wheel The EXCB D14 LED will turn on to indi cate the frost switch is active Defrost Mode run...

Page 41: ... air CFM based on setpoints and current mode of operation The commanded exhaust air CFM Run Status OAU C EX is then calculated by the sum of the actual outside air CFM Run Status OAU A OA and the exhaust air offset set point PE OF During defrost mode the exhaust will run the same as if the outside air fan s were still running When the Power Exhaust Control is set for Building pressure control Conf...

Page 42: ...sed with a high pressure switch trip A high pressure trip is when the compressor suction rises and falls two times within 2 minutes When this occurs the control turns off the compressor and logs a strike for the respective circuit These alerts reset automati cally The possible causes are high pressure switch HPS open Condensate overflow switch COFS open compressor internal protection is open or a ...

Page 43: ...led by setting the corre sponding configuration to DISABLE Alert Codes T110 and T111 Circuit Loss of Charge Alert codes T110 and T111 are for circuits A and B respective ly These alerts have Service Test text that will be displayed if the alert occurred during service test These alerts occur when the compressor is OFF and the suction pressure is less than 5 psig and OAT is greater than 5 F for 1 c...

Page 44: ...ins on the LEN connections Alert Code T180 Loss of Communication with the Econo mizer Actuator This alert occurs when the ECB cannot communicate with the Belimo Actuator If the analog signal is connected properly the economizer can still be controlled through it This is usually caused by a wiring problem actuator failure or the wrong ac tuator Investigate using the Low Voltage Schematic Make sure ...

Page 45: ...ut of Calibration This alert occurs when the economizer actuator reports a con trol angle Operating Modes ECON C ANG less than the minimum control angle Configuration ECON M ANG Initiate economizer calibration Service Test INDP E CAL using the Service Test menu The economizer calibration procedure will try to find new maximum open and closed positions If the alert does not clear automatically afte...

Page 46: ...tactor Service Test Compressor A1 Detected After Turnoff T055 Compressor B1 Safety Trip Add Strike for Circuit B Automatic High pressure switch open Compressor internal protection open Wiring error Service Test Compressor B1 Safety Trip Compressor B1 Detect After Turnoff Turn off all compressors Automatic Welded contactor Service Test Compressor B1 Detected After Turnoff T064 Circuit A Saturated C...

Page 47: ...own Automatic Software failure or MBB failure A157 A D Hardware Failure Unit Shutdown Automatic Software failure or MBB failure A163 Circuit A Down Due to Failure Lockout Circuit A Manual Circuit has 3 strikes or has been locked out by another alarm Service Test Circuit A Down Due to Failure A164 Circuit B Down Due to Failure Lockout Circuit B Manual Circuit has 3 strikes or has been locked out by...

Page 48: ...utomatic Actuator direction control switch CCW CW wrong Excess Outdoor Air Alert Generated Automatic Economizer Economizing When It Should Not Alert Generated Automatic Economizer not Economizing When it Should Alert Generated Automatic Damper Not Modulating Alert Generated Automatic T415 IAQ Input Out of Range No IAQ Operations Automatic Bad sensor bad wiring or sensor configured incorrectly T416...

Page 49: ...uee display The J5 connector on the MBB provides a LEN inter face at the field connection terminal TB YELLOW LED The MBB has one yellow LED which is used to indicate CCN communication activity The Carrier Comfort Network CCN LED will blink during times of network communication Communication Failures If the scrolling marquee or Navigator display Communication Failure or the green or yellow LEDs do ...

Page 50: ...set thermostat or schedule set point Dirty air filters Replace filters Low refrigerant charge Check pressure locate leak repair evacuate and recharge Condenser coil dirty or restricted Clean coil or remove restriction Excessive Condenser Pressures Loose condenser thermistors Tighten thermistors Dirty condenser coil Clean coil Refrigerant overcharge Recover excess refrigerant Faulty TXV 1 Check TXV...

Page 51: ...ncy using ComfortLink scrolling marquee Software configuration error for accessory humidistat Check Space Humidity Switch Configuration UNIT RH SW using ComfortLink scrolling marquee Software configuration error for accessory humidity sensor Check RH Sensor on OAQ Input Configuration UNIT RH S using ComfortLink scrolling marquee No humidity signal Check wiring Check humidistat or humidity sensor C...

Page 52: ...f the T414 alert does not clear check the economizer damper for other mechanical problems 6 Return to Service Test TEST and turn OFF test mode This will cause the unit to return to normal operation Title 24 FDD Status Points The control shall utilize the following points to determine whether a damper is mechanically disconnected ECONO Economizer Installed Flag indicating whether an economizer is i...

Page 53: ...rect otherwise economizer is operating correctly Outdoor air temperature is below economizer low temperature lockout Adjust the low temperature lockout setting if it is incorrect otherwise economizer is operating correctly Enthalpy or differential dry bulb are preventing free cooling Check enthalpy and return air compared to outside air temperature Outdoor air thermistor is faulty Replace outdoor ...

Page 54: ...y schedule set point not calling for Cooling Check using ComfortLink scrolling marquee No gas at main burners Check gas line for air and purge as necessary After purging gas line of air allow gas to dissipate for at least 5 minutes before attempting to re light unit Water in gas line Drain water and install drip Inadequate Heating Dirty air filters Replace air filters Gas input too low Check gas p...

Page 55: ...HALL EFFECT SENSOR SENDS CORRECT SIGNAL TO TERMINAL J1 ON IGC IF LIMIT SWITCH AND ROLLOUT SWITCH ARE CLOSED IGC SAFETY LOGIC WILL INITIATE IGNITION SEQUENCE IGC HIGH VOLTAGE TRANSFORMER CREATES A 10 000 VOLT SPARK FOR 5 SECONDS IGC SAFETY LOGIC OPENS GAS VALVE FOR 5 SECONDS DOES IGC DETECT 2 MICROAMPS FOR 2 SECONDS No Yes AFTER 45 SECONDS OR LESS IF THE TIMING HAS BEEN REDUCED DUE TO LIMIT SWITCH ...

Page 56: ...for LED reset The IGC sensed a flame when the gas valve should be closed Check wiring flame sensor and gas valve operation 4 Flashes Four Consecutive Limit Switch Fault No gas heating Heat call W Off Power reset for LED reset 4 consecutive limit switch faults within a single call for heat See Limit Switch Fault 5 Flashes Ignition Fault No gas heating Heat call W Off Power reset for LED reset Unit ...

Page 57: ...on the tip end of the sensor to release for removal from the panel See Fig 18 To reinstall make sure the snap mount tabs ex tend out Table 21 Electric Heat Service Analysis PROBLEM CAUSE REMEDY Heat Will Not Turn On Active alarm Check active alarms using ComfortLink scrolling marquee Unit is NOT configured for heat Check heating configurations using the ComfortLink scrolling marquee No power to un...

Page 58: ...plying thermocouple and taking readings If a more accurate check is required unit must be shut down and thermistor removed and checked at a known temperature freezing point or boiling point of water using either voltage drop measured across thermistor at the J8 terminal or by deter mining the resistance with unit shut down and thermistor dis connected from J8 Compare the values determined with the...

Page 59: ...59 Fig 19 Saturated Condensing Temperature Thermistor Location 48 50HC 04 07 SCT A SCT A SCT A 48 50HC 04 SIZE 48 50HC 05 06 SIZES 48 50HC 07 SIZE ...

Page 60: ...60 Fig 20 Saturated Condensing Temperature Thermistor Location 48 50HC 08 12 48 50HC 08 09 SIZES SCT B SCT A SCT A SCT A SCT B SCT B SCT A 48 50HC 12 SIZE 48 50HC 11 SIZE ...

Page 61: ...61 Fig 21 Saturated Condensing Temperature Thermistor Location 48 50HC 14 SCT B SCT A CIRCUIT B CIRCUIT A ...

Page 62: ...62 Fig 22 Saturated Condensing Temperature Thermistor Location 48 50HC 17 20 Fig 23 Saturated Condensing Temperature Thermistor Location 48 50HC 24 28 SCT B SCT A SCT B SCT A ...

Page 63: ...CN or directly at the local display This can be useful during diagnos tic testing and also during operation typically as part of an ad vanced third party control scheme Input and output points that may be forced are indicated as forcible in the write status col umn of the display and CCN tables If the user needs to force a variable follow the same process as when editing a configuration parameter ...

Page 64: ...0 179 1 190 0 532 12 58 781 4 273 96 1 948 6 383 180 1 169 0 523 13 57 039 4 254 97 1 921 6 238 181 1 148 0 515 14 55 319 4 235 98 1 894 6 098 182 1 128 0 507 15 53 693 4 215 99 1 867 5 961 183 1 108 0 499 16 52 086 4 195 100 1 841 5 827 184 1 089 0 491 17 50 557 4 174 101 1 815 5 698 185 1 070 0 483 18 49 065 4 153 102 1 789 5 571 186 1 052 0 476 19 47 627 4 132 103 1 763 5 449 187 1 033 0 468 20...

Page 65: ...0 180 561 0 272 13 3 124 28 473 97 1 122 3 099 181 551 0 268 14 3 103 27 624 98 1 104 3 031 182 542 0 264 15 3 082 26 804 99 1 086 2 964 183 533 0 259 16 3 060 26 011 100 1 068 2 898 184 524 0 255 17 3 038 25 245 101 1 051 2 835 185 516 0 251 18 3 016 24 505 102 1 033 2 773 186 508 0 247 19 2 994 23 789 103 1 016 2 713 187 501 0 243 20 2 972 23 096 104 0 999 2 655 188 494 0 239 21 2 949 22 427 105...

Page 66: ...replace the filters It will automatically reset when the pressure differential falls below setpoint Verify proper operation by partially blocking airflow through the ERV filters and confirming that the alarm does trip T418 OAU MOTOR FAILURE This alarm indicates a motor problem in the ERV any one of the motors can trip this alarm outside intake exhaust and or the wheel motor The intake and exhaust ...

Page 67: ...rently used by the ERV Check Diagnostic LEDs Use the on board LEDs to assist in troubleshooting the Ener gyX system The EnergyX Control Board EXCB and the Universal Protocol Converter UPC each have LEDs that can help in the troubleshooting process See Tables 25 27 The EXCB has five green LEDs and one red LED The red LED is for power indication and the green LEDs are status indicators The UPC has s...

Page 68: ...does not have power or software or if it has an error or configured wrong On Board Pressure Transducers The EXCB uses on board pressure transducers to measure the air pressure of the incoming outside air and the building ex haust air The CFM values are then calculated based on these readings and the fan speed There is a pressure transducer for the outside air and one for the exhaust air These are ...

Page 69: ...69 Fig 24 Typical Control Diagram for 48HC 04 14 Units 48HC 08 09 shown ...

Page 70: ...70 Fig 25 Typical Power Diagram for 48HC 04 14 Units 48HC 08 09 shown ...

Page 71: ...71 Fig 26 Typical Control Diagram for 50HC 04 14 Units 50HC 14 shown ...

Page 72: ...72 Fig 27 Typical Power Diagram for 50HC 04 14 Units 50HC 14 Non Humidi MiZer shown ...

Page 73: ...73 Fig 28 Typical Control Diagram 48HC 17 28 Units ...

Page 74: ...74 Fig 29 Typical Control Diagram 50HC 17 28 Units ...

Page 75: ...75 Fig 30 Typical Humid MiZer Power Diagram and Component Arrangement 48 50HC 17 28 Units ...

Page 76: ...76 Fig 31 Typical Non Humid MiZer Power Diagram and Component Arrangement 48 50HC 17 28 Units ...

Page 77: ...ives the Current Sensor inputs for compressors and other discrete or digital inputs The MBB reads space temperature SPT from either a T 55 T 56 or T 58 device and space temperature offset SPTO from a T 56 de vice See Field Installed Accessories section The MBB con trols 11 relays NOTE The Main Base Board MBB has a 3 position instance jumper that is factory set to 1 Do not change this setting Fig 3...

Page 78: ...enser temperature circuit A outdoor coil circuit A 5k thermistor J8 9 10 SCT B Saturated condenser temperature circuit B outdoor coil circuit B 5k thermistor J8 11 12 RAT Return Air Temperature Return 10k thermistor J8 13 14 FAN S Fan status switch indoor fan section switch input J8 15 16 SSP A Suction pressure circuit A compressor A suction pipe 0 5 VDC pressure transducer J8 18 20 SSP B Suction ...

Page 79: ...the board Do not change this setting Fig 33 Economizer Control Board ECB Table 30 Economizer Control Board ECB Connections DISPLAY NAME POINT DESCRIPTION SENSOR LOCATION TYPE OF I O CONNECTION PIN NUMBER INPUTS Input power from MBB control box 24 VAC J1 1 2 RM OC Remote occupancy switch field installed switch input J4 2 ENTH or IAQ S Outdoor enthalpy switch or Indoor air quality switch economizer ...

Page 80: ...C Spade C Input power common Spade SS Speed sensor gas section analog input J1 1 3 FS T1 Flame sensor gas section switch input Spade W Heat stage 1 Call MBB to CTB to IGC 24 VAC J2 2 G Indoor Fan Call CTB to IGC 24 VAC J2 3 R Input power from TRAN 1 CTB to IGC 24 VAC J2 4 RS Rollout switch gas section switch input J2 5 6 LS Limit switch gas section switch input J2 7 8 CS Centrifugal switch not use...

Page 81: ...ch input supply return space 24 VAC input 30 X ALRM Alarm output normally open space 24 VAC output 3 G G Thermostat G Fan space 24 VAC input 4 W1 W1 Thermostat W1 1st stage heat space 24 VAC input 5 W2 W2 Thermostat W2 2nd stage heat space 24 VAC input 6 Y1 Y1 Thermostat Y1 1st stage cool space 24 VAC input 7 Y2 Y2 Thermostat Y2 2nd stage cool space 24 VAC input 8 RAT RAT Return Air Temperature Se...

Page 82: ... A and TB B Board Connections 17 28 Size Units TERMINAL BLOCK TERMINAL LABEL DISPLAY NAME DESCRIPTION SENSOR LOCATION TYPE OF I O TERMINAL NUMBER Upper TB A C 2 Transformer 2 Common 24 VAC common 1 3 4 R 2 24 VAC power Transformer 2 24 VAC 13 15 16 SPT SPT Space temperature T55 56 space 10k thermistor 8 SPT SPT Space temperature T55 56 space 10k thermistor 7 SPTO SPTO Space temperature offset T56 ...

Page 83: ... C C1 Coil 4 5 Comp 2 Jumper ECON CIRCUIT 2 LPS 6 Comp 2 Contactor Signal CIRCUIT 2 HPS C1 Coil 7 ODF Contactor Signal ECON OFC1 Coil CIRCUIT 1 HPS Comp 1 High Pressure Switch CIRCUIT 1 LPS CLO1 COMP1 LPS Comp 1 jumper CLO1 COMP1 CIRCUIT 1 HPS CIRCUIT 2 HPS Comp 2 High Pressure Switch CIRCUIT 2 LPS CLO2 COMP2 LPS Comp 2 jumper CLO2 COMP2 CIRCUIT 2 HPS CONTRL BOARD 2 Heat Stage 2 Call DDC T STAT Ga...

Page 84: ...Protective Devices COMPRESSOR PROTECTION Overcurrent Each compressor has internal line break motor protection Overtemperature Each compressor has an internal protector to protect it against excessively high discharge gas temperatures High Pressure Switch If the high pressure switch trips the compressor will shut down and the compressor safety alarm should trip Refer to the Alarm section for compre...

Page 85: ...ATEWAY COMFORT CONTROLLER CL CL HEATING COOLING UNITS LEGEND TO ADDITIONAL TERMINALS TERMINAL SYSTEM MANAGER CL TCU TCU TCU DAV FAN POWERED MIXING BOX DAV AIR TERMINAL DAVAIR TERMINAL ROOFTOP UNIT AIR DISTRIBUTION DIGITAL AIR VOLUME CONTROL DAV CCN CL DAV HVAC TCU Carrier Comfort Network ComfortLink Controls Digital Air Volume Heating Ventilation and Air Conditioning Terminal Control Unit ...

Page 86: ... is required refer to Fig 41 CARRIER ACCESSORY KITS There are specific accessory kits sold for various field installed accessories These kits vary based on model size voltage manufacture date and duct orientation Some of these kits in clude Economizer Power Exhaust and Electric Heat Refer to the Controls Quick Set Up section for configuration and more information on these accessories TWO POSITION ...

Page 87: ...SOR 7 SENSOR 9 1 RED BLK TB1 T55 SENSOR 1 SENSOR 2 SENSOR 3 SENSOR 4 RED BLK RED BLK RED BLK RED BLK TO MAIN BASE BOARD RED BLK TB1 T55 1 2 2 SPACE TEMPERATURE AVERAGING 4 T 55 SENSOR APPLICATION SPACE TEMPERATURE AVERAGING 9 T 55 SENSOR APPLICATION LEGEND TB Terminal Block ______ Factory Wiring _ _ _ _ Field Wiring T 55 SENSOR 1 T 55 SENSOR 2 T 55 SENSOR 3 T 56 SENSOR 4 RED BLK RED BLK RED BLK RE...

Page 88: ... configuration for systems with Carrier variable volume and temperature VVT accessory controls The field connection terminal board has SAT and RAT termi nals When installing field sensors use these terminals accord ingly to connect into the MBB SPACE HUMIDISTAT The Space Humidistat part no HL 38MG 029 is a wall mounted device with an adjustable setpoint to control humidity levels The humidistat in...

Page 89: ...89 Fig 42 Modulating ERV Wiring Schematic ...

Page 90: ...90 Fig 43 EnergyX ERV Control Box Component Layouts ...

Page 91: ...x Input 24VAC J3 1 2 Power to Relays Low voltage control box Output 24VAC J4 1 Power to UPC Low voltage control box Output 24VDC J4 3 4 Wheel Rotation Sensor Attached to scoop Input Switch J5 2 4 Frost Switch Attached to scoop Input Switch J6 3 4 Filter Status Switch Attached to scoop and in Exhaust air section Input Switch J7 3 4 Motor Status Switches Integrated in motors Input Switch J8 3 4 Leav...

Page 92: ...D Texts Initialize_LEN Communication This will occur when the ERV is turned on from a power reset Communication Connected This will be displayed when correct communication is estab lished between the RTU and ERV and within the ERV Comm Failure1 UPC_to_LEN_Fail This occurs if there is a communication problem between the UPC and ComfortLink MBB Comm Failure2 UPC_to_EXCB_Fail This will occur if there...

Page 93: ...eed the sensor will open causing the rotation monitor relay to close a contact to initiate the wheel status alarm The motion sensor is factory set at the highest speed clockwise until stop and should not be changed Refer to the troubleshooting section for details on the alarms FILTER MAINTENANCE FIELD INSTALLED ONLY Filter maintenance consists of two field installed pressure sen sor devices which ...

Page 94: ...gauge Fig 46 Diameter Seal Adjustment Wheel and Segment Removal Installation The wheel and segments represent a substantial portion of the value of the cassette therefore must be handled with care and never be dropped Use a suitable crate or harness to lift wheel and segments to a roof surface never use the shipping cartons for this purpose Wheel and segments may require slight per suasion during ...

Page 95: ...ence with the remaining segments as necessary 13 When complete close access door and remove lockout and tag out to apply power to unit WHOLE WHEEL REMOVAL INSTALLATION 19 INCH WHEEL These wheels are secured to the shaft and bearing support beam by a Philips head screw and hub cover Follow the steps below for removal and reverse for installation See Fig 51 1 Turn off lockout and tag out electrical ...

Page 96: ... occurs use equivalent gasket to replace before reattaching the hood 3 Disconnect the green HIGH and yellow LOW tubes attached to the quick connects located inside the ERV Do NOT damage the tubes EXHAUST AIR HOOD REMOVAL 1 Turn off lockout and tag out electrical power to unit 2 Remove the hood by removing the self sealing screws along the perimeter of the hood NOTE Even after all screws have been ...

Page 97: ...e air motorized damper see procedure above 4 Remove the lower and upper guides for the outside air motorized damper by removing the screws along the length of the flanges connecting them to the inside of the ERV unit 5 Disconnect the connector PL121 PL123 and the power wires for the exhaust fan motor from the wiring harness inside the air chamber of the EnergyX unit 6 Remove the fasteners at each ...

Page 98: ...ove Fasteners from Corners of Outside Air Fan Assembly Outside Air Damper Access Panel Motorized Outside Air Damper Detail A Outside Air Fan Assembly Remove Bolts 4 Places Outside Air Fan Assembly see Detail A access panel not shown Remove Fasteners 4 Places ...

Page 99: ...xhaust fan front panel NOTE See instructions for removing the wheel and exhaust fil ters if more room is needed to access the exhaust fan front panel 4 If installed remove the exhaust motorized damper 5 Remove the fasteners around the perimeter of the exhaust fan that secure the exhaust fan front panel to the dividing wall by access through the door of the unit See Fig 58 6 Disconnect connectors P...

Page 100: ...100 Fig 58 Exhaust Fan Assembly Fastener Locations Detail A Exhaust Fan Assembly secured to Dividing Wall Remove Fasteners 8 Places ...

Page 101: ...101 Fig 59 Exhaust Fan Assembly Removal Exhaust Fan Assembly ...

Page 102: ...N forcible EFF C Cool Setpoint In Effect xx x F CSP_EFF EFF H Heat Setpoint In Effect xx x F HSP_EFF OCC Currently Occupied No Yes OCCUPIED forcible T OVR Timed Override in Effect No Yes MODETOVR LINK Linkage Active No Yes MODELINK D LMT Demand Limit In Effect No Yes MODEDMDL C LOC Compressor OAT Lockout No Yes COMPLOCK H LOC Heat OAT Lockout No Yes HEATLOCK OK EC OK to Use Economizer No Yes ECONC...

Page 103: ...Actual Position ECONOPOS EC CL OK To Use Econo for T24 T24ECOOL OK TS OK Test Mech D C Act OKTSTMDA RO OK RAT OAT OK for Title 24 T24RO_OK PR SA Title 24 Previous SAT T24PRSAT PR SA Title 24 Econ Samp Pos T24ECSMP SA CT Title 24 SAT Check Time T24SATCT TS MK Title 24 Test Mark T24tSMRK ELP S Elapsed Seconds ELAPSECS S VFD SUPPLY FAN VFD VFD_DATA VFD1 Status Word 1 NNNNN VFD1STAT SPD VFD1 Actual Sp...

Page 104: ...n 1 Run Hours xxxxx xx hours HR_IDF1 forcible IDF2 Indoor Fan 2 Run Hours xxxxx xx hours HR_IDF2 forcible IDF3 Indoor Fan 3 Run Hours xxxxx xx hours HR_IDF3 forcible HT 1 Heat Stage 1 Run Hours xxxxx xx hours HR_HTR_1 forcible HT 2 Heat Stage 2 Run Hours xxxxx xx hours HR_HTR_2 forcible PE 1 Power Exhaust1 Run Hours xxxxx xx hours HR_PE_1 forcible PE 2 Power Exhaust2 Run Hours xxxxx xx hours HR_PE...

Page 105: ...viOutsideRH xxxx x NVI_OARH forcible nvoEffectSetPt xxx x F NVO_EFSP nvoOutsideTemp xxxx x F NVO_OAT nvoOutsideRH xxx x NVO_OARH nviSpaceRH xxx x NVI_SPRH forcible nviCO2 xxxxx NVI_CO2 forcible nvoCO2 xxxxx NVO_CO2 nvoTEMP1 xxx x F NVO_SAT nvoTEMP2 xxx x F NVO_RAT nviPCT1 xxx x NVI_RHSP forcible nvoPCT1 xxx x NVO_SPRH nviDISCRETE1 Off On NVI_FSD forcible nviDISCRETE2 No Yes NVI_OCC forcible nviDIS...

Page 106: ...educed Cool Fan Speed 0 to 100 S_FSPDCL HMZR Test Humidimizer TESTHMZR RH1 A Reheat1 A Test Off On S_RH1_A RH1 B Reheat1 B Test Off On S_RH1_B RH2 A Reheat2 A Test Off On S2_RH2_A RH2 B Reheat2 B Test Off On S2_RH2_B F SPD Reheat2 Fan Speed 0 to 100 S_FSPDRH CRC Cool Reheat1 Valve Test Off On S_CRC RHV A Reheat2 Valve A Test Off On S_RH2_A RHV B Reheat2 Valve B Test Off On S_RH2_B HEAT Test Heatin...

Page 107: ...ity Switch Low High HUM_STAT forcible forcible IGC F IGC Fan Request Off On IDF_FDBK CS A1 Compressor A1 Feedback Off On CS_A1 CS B1 Compressor B1 Feedback Off On CS_B1 AIR Q Air Quality Inputs IAQ S IAQ Level switch Low High IAQIN forcible forcible IAQ IAQ Level sensor xxxx IAQ forcible forcible OAQ OAQ Level sensor xxxx OAQ forcible forcible SP RH Space Humidity Sensor xxx x SPRH forcible forcib...

Page 108: ...FIGURATION UNIT S DLY Startup Delay 10 to 600 sec 30 STARTDLY 16 U CTL Unit Control Type 2 Thermostat 3 Space Sensor 2 CTL_TYPE 16 T CTL Thermostat Control Type 0 Adaptive 1 1 Stage Y1 2 2 Stage Y1 3 Digital 0 STATTYPE 16 FN SW Fan Status Switch 0 No Switch 1 Normal Open 2 Normal Closed 0 FANSTCFG 17 FL SW Filter Status Switch 0 No Switch 1 Normal Open 2 Normal Closed 0 FILSTCFG 17 FS SW Fire Shut...

Page 109: ...120 to 999 sec 300 MIN_ON_S 35 C DEC Cool Stage Decrease Time 120 to 999 sec 300 STAGEDEC 21 C INC Cool Stage Increase Time 120 to 999 sec 450 STAGEINC 21 FOD C Fan off Delay Mech Cool 0 to 600 sec 30 04 05 75 06 28 COOL_FOD 19 ALM N Alert Each Strike No Yes Yes ALM_NOW 35 CA LO Circuit A Lockout Temp 0 to 100F F 40 0 Low ambient or Humidimizer FIOP OATLCMPA 21 CB LO Circuit B Lockout Temp 0 to 10...

Page 110: ...0 to 999 sec 120 HMIN_OFF 20 H DEC Heat Stage Decrease Time 120 to 999 sec 300 HSTAGDEC 20 H INC Heat Stage Increase Time 120 to 999 sec 450 HSTAGINC 20 FOD E Fan off Delay Elect Heat 10 to 600 sec 30 ELEC_FOD 16 FOD G Fan off Delay Gas Heat 45 to 600 sec 45 GAS_FOD 16 HT LO Heating Lockout Temp 40 to 125 F 75 OATLHEAT 19 SAT SUPPLY AIR TEMPERATURE SAT H SAT Heat Mode Sensing Disable Enable Disabl...

Page 111: ...o 20 T24ECSTS 22 S CHG T24 Econ Move SAT Change 0 to 5 T24SATMD 22 E SOD T24 Econ RAT OAT Diff 5 to 20 T24RATDF 22 E CHD T24 Heat Cool End Delay 0 to 60 T24CHDLY 22 ET MN T24 Test Minimum Pos 0 to 50 T24TSTMN 22 ET MX T24 Test Maximum Pos 50 to 100 T24TSTMX 22 AIR Q AIR QUALITY CONFIG IAQ_CFG IA CF IAQ Analog Input Config 0 No IAQ 1 DCV 2 Override IAQ 3 Ctrl Min Pos 0 no FIOP 1 FIOP IAQANCFG 24 IA...

Page 112: ... Offset CFM 1 BP 0 PEX_CTL PE OF Power Exhaust CFM Offset 17000 to 17000 CFM 200 EXOFFSET BP SP Building Pressure Setpnt 0 25 to 0 25 in H2O 0 05 OAU_BPSP OA TM Outside Air Tempering Disable Enable Disable OATEMPER TM LO OA Tempring Lockout Temp 0 to 80 F 60 OATMPLOC TM SP OA Tempring SAT Setpoint 35 to 80 F 55 OATMPSPT OAC K Outside Air CFM k Factor 0 8 to 1 2 1 0 OACFM_K EXC K Exhaust Air CFM k ...

Page 113: ... POINT 16 Definition Point_16 POINT 17 Definition Point_17 POINT 18 Definition Point_18 POINT 19 Definition Point_19 POINT 20 Definition Point_20 TRIM Sensor Calibration CCN TRIM see Maintenance Display SPT C Space Temp Calibration 30 to 130 F 49 SPT T Space Temp Trim 30 to 30 F 0 49 SAT C Supply Air Temp Calib 30 to 130 F 49 SAT T Supply Air Temp Trim 30 to 30 F 0 49 RAT C Return Air Temp Calib 3...

Page 114: ... 1 to 7 7 STARTD M ADD Minutes to Add 0 to 90 60 MINADD STP M Stop Month January February December 11 STOPM STP W Stop Week 1 to 5 1 STOPW STP D Stop Day 1 to 7 7 STOPD M SUB Minutes to Subtract 0 to 90 60 MINSUB SCH L Occupancy Schedule SCH L Display only PER x Occupancy Period x OCC x Occupied From 00 00 to 23 59 hh mm 00 00 PERxOCC UNC x Occupied To 00 00 to 23 60 hh mm 00 00 PERxUNC MON x Mond...

Page 115: ...umber Serial Number Reference Number Table K Mode Operating Modes ITEM EXPANSION RANGE UNITS CCN TABLE Sub TABLE CCN POINT CCN WRITE STATUS DISPLAY WRITE STATUS OPERATING MODES MAINTENANCE DISPLAY MODE Control Modes MODES SYS Unit operation disabled Unit operation enabled Service test enabled SYS_MODE_TEXT1 SYS_MODE_TEXT2 table only SYS_MODE_TEXT3 table only HVAC HVAC Operation Disabled Ventilatio...

Page 116: ... Air Temp Demand xxx x F SAT_DMD SA PD SAT Cool Demand Level xx x F SAT_POS SA ND SAT Cool Demand Level xx x F SAT_NEG SAT U Minimum SAT Upper Level xx x F SATMIN_H SAT L Minimum SAT Lower Level xx x F SATMIN_L SA TR Supply Air d dt F min xxxx x SATTREND SA DR SAT Delta Reference Temp xxx x F SAT_REF SPT Space Temperature SPT Space Temperature xxx x F SPACE_T forcible forcible DMD C Cooling Demand...

Page 117: ...T Heat Demand Level xx x F HDEM_NEG H LAG Heat Thermal Lag Factor x x HEAT_LAG ECON Economizer Diagnostic ECONDIAG EC EN Economizer Installed No Yes ECONO OK EC OK to Use Economizer No Yes ECONCOOL OCC Currently Occupied No Yes OCCUPIED forcible forcible F MOD Indoor Fan Mode x IDF_MODE F SPD Commanded Fan Speed xxx FANSPEED COOL In Cooling Mode No Yes IN_COOL OAT Outdoor Air Temperature xxx x F O...

Page 118: ...FM xxxxx CFM ACTEXCFM C EX Command Exhaust Air CFM xxxxx CFM CMDEXCFM BP SP Building Pressure Setpnt x xx in H2O OAU_BPSP BP Building Pressure x xx in H2O OAU_BP TM LO OA Tempring Lockout Temp xx F OATMPLOC TM SP OA Tempring SAT Setpoint xx F OATMPSPT OA HT OAU Tempering Heater xxx OAHEATER ALM 1 OAU Motor Failure Alarm Off On OAUALRM1 ALM 2 OAU Dirty Filter Alarm Off On OAUALRM2 ALM 3 OA Low CFM ...

Page 119: ... LLASTUOD Last Unoccupied Time xx xx hh mm LLASTUNC forcible OCCDEFM CCN only Occupancy Supervisory OCCDEFM Current Mode 1 Occup 0 1 MODE Current Occup Period 0 to 8 PER_NO Time Override in Effect No Yes OVERLAST Time Override Duration 0 to 4 hours OVR_HRS Current Occupied Tiime xx xx hh mm STRTTIME Current Unoccupied Time xx xx hh mm ENDTIME Next Occupied Day NXTOCDAY Next Occupied Time xx xx hh ...

Page 120: ...411 Y2 without Y1 ON ON HIGH Subcooling Min Position no alarm ON OFF LOW OFF or ON Cooling OFF ON LOW OFF or ON Cooling alarm T411 Y2 without Y1 ON ON LOW OFF or ON Cooling no alarm ECONO AVAILABLE Y1 Y2 HUMIDISTAT CIRCUIT A CIRCUIT A ECONOMIZER NO OFF OFF LOW OFF OFF Min Position Econo closed if fan off OFF OFF HIGH HGRH HGRH Min Position ON OFF HIGH Subcooling HGRH Min Position OFF ON HIGH Subco...

Page 121: ...that are set by the ComfortLink controls and sent to the VFD over the LEN at power up of the VFD These are hard coded to be set as listed The parameters listed in Table S have corresponding Com fortLink configurations Configuration I FAN S VFD The factory sets these parameters per motor installed in the unit and these should not be adjusted in the field These are only provided for drive or motor r...

Page 122: ...top Dir EXT1 COMMANDS 1001 DI1 COMM Reference Select REF1 SELECT 1103 AI1 COMM Constant Speeds CONST SPEED 7 1208 60 Hz 0 Hz System Controls RUN ENABLE 1601 NOT SEL NOT SEL FAULT RESET SEL 1604 KEYPAD COMM START ENABLE 1 1608 DI4 DI4 Start Stop START FUNCTION 2101 SCALAR FLYSTART AUTO STOP FUNCTION 2102 COAST RAMP Fault Functions COMM FAULT FUNC 3018 NOT SEL CONST SP 7 COMM FAULT TIME 3019 10 0 s ...

Page 123: ...Default Configurations UNIT SIZE Digits 7 8 UNIT VOLTAGE Digit 12 UNIT STATIC OPTION Digit 10 COMFORTLINK CCN POINT DISPLAY MENU ITEM VFD1NVLT N VLT VFD1NAMP N AMP VFD1NFRQ N FRQ VFD1NRPM N RPM VFD1NPWR N PWR VFD1MAXA MAX A 08 208 230v 5 Low 1 230 5 8 60Hz 1725 1 7 6 7 Medium 2 230 7 9 60Hz 1725 2 4 9 1 High 3 230 11 7 60Hz 1725 3 7 13 5 460v 6 Low 1 460 2 9 60Hz 1725 1 7 3 3 Medium 2 460 3 6 60Hz...

Page 124: ...h 3 230 13 6 60Hz 1740 5 3 15 6 H Low 5 230 9 2 60Hz 1725 2 9 10 6 H Medium 6 230 11 7 60Hz 1725 3 7 13 5 H High 7 230 13 6 60Hz 1740 5 3 15 6 460v 6 V Low 1 460 4 2 60Hz 1725 2 9 4 8 V Medium 2 460 5 4 60Hz 1725 3 7 6 2 V High 3 460 6 4 60Hz 1740 5 3 7 4 H Low 5 460 4 2 60Hz 1725 2 9 4 8 H Medium 6 460 5 4 60Hz 1725 3 7 6 2 H High 7 460 6 4 60Hz 1740 5 3 7 4 575v 1 V Low 1 575 4 9 60Hz 1725 3 7 5...

Page 125: ...ng the red LED on the drive LED is either steady or flashing 2 Setting an appropriate bit in a Fault Word parameter 0305 to 0307 3 Overriding the control panel display with the display of a fault code 4 Stopping the motor if it was on 5 Sets an appropriate bit in Fault Word parameter 0305 0307 UNIT SIZE Digits 7 8 UNIT VOLTAGE Digit 12 UNIT STATIC OPTION Digit 10 COMFORTLINK CCN POINT DISPLAY MENU...

Page 126: ...cessive Check for excessive motor load insufficient acceleration time parameters 2202 ACCELER TIME 1 default 30 seconds or faulty motor motor cables or connections 2 DC OVERVOLT Intermediate circuit DC voltage is excessive Check for static or transient over voltages in the input power supply insufficient deceleration time parameters 2203 DECELER TIME 1 default 30 seconds or undersized brake choppe...

Page 127: ...owing 2001 MINIMUM SPEED 2002 MAXIMUM SPEED 2007 MINIMUM FREQ 2008 MAXIMUM FREQ 2001 MINIMUM SPEED 9908 MOTOR NOM SPEED is outside of the range 128 128 2002 MAXIMUM SPEED 9908 MOTOR NOM SPEED is outside of the range 128 128 2007 MINIMUM FREQ 9907 MOTOR NOM FREQ is outside of the range 128 128 2008 MAXIMUM FREQ 9907 MOTOR NOM FREQ is outside of the range 128 128 1001 PAR PFA REFNG Parameter values ...

Page 128: ...larm warns that a Motor Overload fault trip may be near Check for overloaded motor Adjust the parameters used for the estimate 3005 through 3009 Check the temperature sensors and Group 35 parameters 2011 UNDERLOAD Motor load is lower than expected This alarm warns that a Motor Underload fault trip may be near Check that the motor and drive ratings match motor is NOT undersized for the drive Check ...

Page 129: ...ntrol Type 2 Thermostat 3 Space Sensor 2 CTL_TYPE T CTL Thermostat Control Type 0 Adaptive 1 1 Stage Y1 2 2 Stage Y1 3 Digital 0 STATTYPE FN SW Fan Status Switch 0 No Switch 1 Normal Open 2 Normal Closed 0 FANSTCFG FL SW Filter Status Switch 0 No Switch 1 Normal Open 2 Normal Closed 0 FILSTCFG FS SW Fire Shutdown Switch 0 No Switch 1 Normal Open 2 Normal Closed 0 no FIOP 1 FIOP SHTDNCFG RM SW Remo...

Page 130: ...DEC C INC Cool Stage Increase Time 120 to 999 sec 450 STAGEINC FOD C Fan off Delay Mech Cool 0 to 600 sec 30 04 05 75 06 28 COOL_FOD ALM N Alert Each Strike No Yes Yes ALM_NOW CA LO Circuit A Lockout Temp 0 to 100F F 40 0 Low ambient or Humidimizer FIOP OATLCMPA CB LO Circuit B Lockout Temp 0 to 100F F 40 0 Low ambient or Humidimizer FIOP OATLCMPB D CMP Diagnose Comp Safety Disable Enable Enable D...

Page 131: ...99 sec 300 HSTAGDEC H INC Heat Stage Increase Time 120 to 999 sec 450 HSTAGINC FOD E Fan off Delay Elect Heat 10 to 600 sec 30 ELEC_FOD FOD G Fan off Delay Gas Heat 45 to 600 sec 45 GAS_FOD HT LO Heating Lockout Temp 40 to 125 F 75 OATLHEAT SAT SAT H SAT Heat Mode Sensing Disable Enable Disable SAT_HEAT SAM L Maximum SAT Lower Level 85 to 200 F 140 SATMAX_L SAM U Maximum SAT Upper Level 85 to 200 ...

Page 132: ...o 5 T24SATMD E SOD T24 Econ RAT OAT Diff 5 to 20 T24RATDF E CHD T24 Heat Cool End Delay 0 to 60 T24CHDLY ET MN T24 Test Minimum Pos 0 to 50 T24TSTMN ET MX T24 Test Maximum Pos 50 to 100 T24TSTMX AIR Q Air Quality Config IAQ_CFG IA CF IAQ Analog Input Config 0 No IAQ 1 DCV 2 Override IAQ 3 Ctrl Min Pos 0 no FIOP 1 FIOP IAQANCFG IA FN IAQ Analog Fan Config 0 Never 1 Occupied 2 Always 0 IAQANFAN II C...

Page 133: ...CFM 0 PEX_CTL PE OF P Power Exhaust CFM Offset 17000 to 17000 CFM 200 EXOFFSET BP SP Building Pressure Setpoint 0 25 to 0 25 in H2O 0 05 OAU_BPSP OA TM Outside Air Tempering Disable Enable Disable OATEMPER TM LO OA Tempring Lockout Temp 0 to 80 F 60 OATMPLOC TM SP OA Tempring SAT Setpoint 35 to 80 F 55 OATMPSPT OAC K Outside Air CFM k Factor 0 8 to 1 2 1 0 OACFM_K EXC K Exhaust Air CFM k Factor 0 ...

Page 134: ...ition Point_11 POINT 12 Definition Point_12 POINT 13 Definition Point_13 POINT 14 Definition Point_14 POINT 15 Definition Point_15 POINT 16 Definition Point_16 POINT 17 Definition Point_17 POINT 18 Definition Point_18 POINT 19 Definition Point_19 POINT 20 Definition Point_20 TRIM Sensor Calibration CCN TRIM see Maintenance Display SPT C Space Temp Calibration 30 to 130 F SPT T Space Temp Trim 30 t...

Page 135: ...EXT OV SP SPT Override Enabled No Yes Yes TIMEOVER LDSH CCN LOADSHED CONFIG LOADSHED S GRP Loadshed Group Number 0 to 16 0 SHED_NUM R MXC Redline Max Cool Stages 0 to 3 2 MAXCREDL S MXC Loadshed Max Cool Stages 0 to 3 2 MAXCSHED R MXH Redline Max Heat Stages 0 to 2 2 MAXHREDL S MXH Loadshed Max Heat Stages 0 to 2 2 MAXHSHED APPENDIX C VARIABLE FREQUENCY DRIVE VFD cont Table X Mode Configuration co...

Page 136: ...ese exhaust fans are backwards curved impeller designs which are capable of significant more static pressure operation than typical forward curved fan designs The follow ing exhaust fan performance curves are provided for additional guidance when considering return exhaust duct design NOTE If application designs require two separate ducts one for exhaust air one for return air contact your Carrier...

Page 137: ...FORMANCE cont Fig C 4 and 5 Ton SRT Unit ERV Supply and Exhaust Fan Performance Curves External Static Pressure in H20 ECONOMIZER MODE ERV MODE CFM 0 00 0 20 0 40 0 60 0 80 1 00 1 20 1 40 1 60 0 200 400 600 800 1000 1200 1400 1600 1800 2000 ...

Page 138: ...nd 10 Ton SRT Unit ERV Supply and Exhaust Fan Performance Curves ECONOMIZER MODE ERV MODE External Static Pressure in H20 CFM 0 00 0 50 1 00 1 50 2 00 2 50 3 00 0 200 400 600 800 1000 1200 1400 1600 1800 2000 2200 ERV MODE ECONOMIZER MODE 0 500 1000 1500 2000 2500 3000 3500 0 00 0 50 1 00 1 50 2 00 2 50 3 00 3 50 4 00 4 50 5 00 CFM 2O ...

Page 139: ... and 17 5 Ton Unit ERV Supply Exhaust Fan Performance Curves 0 500 1000 1500 2000 2500 3000 3500 4000 4500 5000 0 00 0 50 1 00 1 50 2 00 2 50 3 00 3 50 4 00 4 50 5 00 ECONOMIZER MODE ERV MODE CFM 2O 0 1000 2000 3000 4000 5000 6000 7000 8000 9000 0 00 0 50 1 00 1 50 2 00 2 50 3 00 3 50 4 00 4 50 5 00 ERV MODE ECONOMIZER MODE CFM 2O ...

Page 140: ...ST FAN PERFORMANCE cont Fig H 20 and 25 Ton Unit ERV Supply Exhaust Fan Performance Curves 0 1000 2000 3000 4000 5000 6000 7000 8000 9000 10000 0 00 0 50 1 00 1 50 2 00 2 50 3 00 3 50 4 00 4 50 5 00 ECONOMIZER MODE ERV MODE CFM 2O ...

Page 141: ......

Page 142: ...ht 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 Carrier Corporation 2019 ...

Page 143: ...1 _________ ERV SUPPLY FAN 1 AMPS L1 L2 _________ L2 L3 _________ L3 L1 _________ ERV SUPPLY FAN 2 AMPS L1 L2 _________ L2 L3 _________ L3 L1 _________ ERV EXHAUST FAN 1 AMPS L1 L2 _________ L2 L3 _________ L3 L1 _________ ERV EXHAUST FAN 2 AMPS L1 L2 _________ L2 L3 _________ L3 L1 _________ Distribution Block on 575v units will be 230v or 460v TEMPERATURES OUTDOOR AIR TEMPERATURE OAT _______F dB...

Page 144: ...g CL 2 7 19 Replaces 48 50HC 04T Carrier Corporation 2018 CUT ALONG DOTTED LINE CUT ALONG DOTTED LINE III CONFIGURATION USED IN CONJUNCTION WITH BASE UNIT START UP CONFIGURATIONS MINIMUM DCV OUTSIDE AIR CFM DCV M _____________ MINIMUM OUTSIDE AIR CFM OA MN _____________ EXHAUST AIR OFFSET CFM PE OF _____________ BUILDING PRESSURE SETPOINT BP SP _____________ FROST PROTECTION DIAL SETPOINT ________...

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