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Figure 5. CoreSense

TM

 Diagnostics Module

Compressor
Common Wire

Reset Button

Trip / Lock
(Red LED)

Run / Alert
(Yellow LED)

Compressor Protection

The CoreSense

TM

 Diagnostics module utilizes proprietary 

algorithms to protect the compressor and system from 
repeated trips of system pressure controls and the 
compressor internal overload. The protection terminal 
of the module should be wired in series with the system 
low pressure and high pressure cutouts, as well as the 
compressor contactor. When the module detects a series 
of trips as described below, it will activate a lockout feature 
that opens the normally closed protection contacts in 
the module, thereby cutting power to the contactor and 
shutting off the compressor.

Resetting Alert Codes

When the CoreSense

TM

 Diagnostics module has detected a 

series of adverse conditions that have caused it to lockout 
the compressor, and after the issue has been resolved, 
it is necessary to manually reset the module in order to 
clear the present alert code.

The primary way of clearing the code and resetting the 
alert is to press the reset button located on the module. 

NOTE: Pressing the reset will require a pin or a mini 
electronics screwdriver. This button must be pressed and 
held for a minimum of one second for the module to be 
reset. Pressing the reset button clears the immediate lock 
code and the seven day operating history. It will not clear 
the permanent module history. In the case of the three-
wire module, the codes can be reset or cleared by cycling 
power to the module. This can be done by disengaging 
the Common (C) terminal. This will not clear the seven 
day operating history.

START UP & ADJUSTMENTS

Pre-Start Check List

  Verify the unit is level and has sufficient clearances for 

unobstructed airflow.

  Verify the outdoor coil and top of the unit are free from 

obstructions and debris, and all equipment access/
control panels are in place.

  Verify that the line voltage power leads are securely 

connected and the unit is properly grounded.

    Verify that the low voltage wires are securely connected 

to the correct leads on the low voltage terminal strip.

  Verify that the power supply branch circuit overcurrent 

protection is sized properly.

  Verify that the thermostat is wired correctly.

Start-Up Procedures

 WARNING:

This unit is equipped with a crankcase heater. 
Allow 24 hours prior to continuing the start up 
procedures to allow for heating of the refrigerant 
compressor crankcase. Failure to comply may 
result in damage and could cause premature 
failure of the system. This warning should be 
followed at initial start up and any time the power 
has been removed for 12 hours or longer.

Air Circulation - Indoor Blower

1. Set the thermostat system mode on OFF and the fan 

mode to ON.

2. Verify the blower runs continuously. Check the air delivery 

at the supply registers and adjust register openings for 
balanced air distribution. If insufficient air is detected, 
examine ductwork for leaks or obstructions.

3. Set the thermostat fan mode to AUTO and verify the 

blower stops running.

Short Cycle Protection

1. Set the thermostat system mode to COOL. Observe the 

temperature setting of the thermostat and gradually raise 
the set-point temperature until the unit de-energizes.

2. Immediately lower the set point temperature of the 

thermostat to its original setting and verify that the 
indoor blower is energized and outdoor unit remains 
de-energized.

3. After approximately 5 minutes, verify the outdoor unit 

energizes and the temperature of the discharge air is 
cooler than the room temperature.

Содержание T4BD-042 Series

Страница 1: ...n how to operate and maintain the equipment for the life of the product Safety should always be the deciding factor when installing this product and using common sense plays an important role as well...

Страница 2: ...orotherhazardous conditions which may result in personal injury or property damage Installation of equipment may require brazing operations Installer must comply with safety codes andwearappropriatesa...

Страница 3: ...iled immediately with the carrier Pleaseconsultyourdealerformaintenanceinformation and availability of maintenance contracts Please read all instructions before installing the unit Locating the Heat P...

Страница 4: ...dryer is provided with the unit and must be installedintheliquidlineofthesystem Iftheinstallation replaces a system with a filter dryer already present in the liquid line the filter dryer must be rep...

Страница 5: ...y andtherestrictororifice whilebeingcarefulnottoscratch either part Carefully remove the restrictor orifice from the valve body See Figure 3 page 4 3 Check the actual size of the new orifice NOTE The...

Страница 6: ...Diagnostics Module Select Models Only The CoreSenseTM Diagnostics Module Figure 5 page 7 is a breakthrough innovation for troubleshooting heatpumpandairconditioningsystemfailures Themodule installs ea...

Страница 7: ...tart Check List Verify the unit is level and has sufficient clearances for unobstructed airflow Verify the outdoor coil and top of the unit are free from obstructions and debris and all equipment acce...

Страница 8: ...2 sec and does not start within 35 sec 10x consecutive Red Flash4 Yellow Off Code5 Yellow Flash 5 Compressor moderate run trip Compressor runs for 15 min to 18 hrs followed by a compressor trip lastin...

Страница 9: ...Data sheet for additional charging information Outdoor units with non AHRI listed indoor coils are not recommended and deviations from rated airflows or non listedcombinationsmayrequiremodificationtot...

Страница 10: ...ange of operation Reference the charts to determine the ideal amount of sub cooling for a given liquid pressure Units charged to other values will not perform at the rated unit efficiency EER or rated...

Страница 11: ...below the curve T4BD 048KA Charging Chart Cooling Figure 7 Charging Chart for 4 Ton Units TXV Matches 200 220 240 260 280 300 320 340 360 380 400 420 440 460 480 500 520 540 560 580 600 75 80 85 90 95...

Страница 12: ...ring wet bulb temperatures are lower than design 1 All pressures are listed in psig and all temperatures in F 2 Discharge temperatures greater than charted values indicate an undercharged system 3 Dis...

Страница 13: ...LIQ PRESS DIS TEMP LIQ PRESS DIS TEMP 121 244 135 123 245 135 267 141 125 246 135 268 141 290 147 127 247 136 269 142 291 147 313 154 129 248 136 270 142 292 148 314 154 336 160 131 271 142 293 148 31...

Страница 14: ...the liquid line temperature on the inlet and outlet of the filter dryers If it is the factory dryer and in good condition there should be no temperature difference If the temperature difference is lar...

Страница 15: ...0 221 232 105 45 239 250 112 60 257 268 120 75 275 286 127 90 288 299 136 105 314 325 146 121 339 350 155 31 228 239 103 46 245 256 110 61 261 272 118 76 278 289 125 91 295 306 133 106 321 332 141 122...

Страница 16: ...ot suitable on systems that exceed 150 volts to ground 4 For replacement wires use conductors suitable for 105 C 5 For ampacities and overcurrent protection see unit rating plate 6 Connect to 24 vac 4...

Страница 17: ...0 volts to ground 4 For replacement wires use conductors suitable for 105 C 5 For ampacities and overcurrent protection see unit rating plate 6 Connect to 24 vac 40va class 2 circuit See furnace air h...

Страница 18: ...ts to ground 4 For replacement wires use conductors suitable for 105 C 5 For ampacities and overcurrent protection see unit rating plate 6 Connect to 24 vac 40va class 2 circuit See furnace air handle...

Страница 19: ...19...

Страница 20: ...NO INSTALLER NAME CITY________________________ STATE_________________ Has the owner s information been reviewed with the customer YES NO Has the Literature Package been left with the unit YES NO 7096...

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