2024 Inverter Driven Unit – Live – Carrier Enterprise South Central Technical Support

One of the best ways to get information on Carrier & Bryant equipment is to _____________________.

Download and Use the Carrier/Bryant Mobile App

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Search on Google

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Call tech support

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Ask my boss/supervisor

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On the the Carrier/Bryant Mobile App what features are available?

Barcode scanning of unit’s serial or model number

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Literature list for models and ability to search all available literature

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Product Catalog model lookup

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Bill of Material parts list including part supersession

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Warranty entitlement & service history

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Aftermarket components cross reference tool

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Distributor store locator

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Tech Tips videos for installation guides, troubleshooting help and best practices

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Instant authentication with support for fingerprint and facial recognition on compatible devices

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Interactive Troubleshooting tool

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All of the above

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What is the most unique feature added to the Infinity® 26/24 with Greenspeed Intelligence & Evolution™ Extreme 26/24 systems?

It's 84" tall to make service easier

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Has Bluetooth technology to aid in diagnostics

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Is round shaped

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Has a ceramic coated condenser coil.

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Where is it recommended to install the filter/drier on the 4 ton unit and smaller?

Near the indoor coil

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Near the outdoor unit

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A filter/drier is not required for these units

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At the easiest location

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What terminals are required to be hooked up for proper operation in a communicating system?

A & B

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A, B & C

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A, B, C & D

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A, B + Shield

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What is the purpose of the Braze Plate Heat Exchanger in the 5 ton machines?

Help with refrigerant noise

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Increase capacity

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Keep refrigerant from migrating

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No longer require an accumulator

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What is the most unique feature added to the Infinity® 26/24 with Greenspeed Intelligence & Evolution™ Extreme 26/24 systems?

It's 84" tall to make service easier

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Has Bluetooth technology to aid in diagnostics

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Is round shaped

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Has a ceramic coated condenser coil.

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What does the PCM sense to control the EXV in heating mode?

Indoor static pressure

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suction pressure and temperature

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Discharge temperature and pressure

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Outdoor ambient temperature

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The green LED on the PCM board indicates what?

Fault codes

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Power on to the outdoor unit

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Successful communications

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24 VAC Present at the outdoor unit

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When does the ECM fan motor NOT operate?

Off cycle and defrost

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Low ambient condition

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Defrost and during low ambient operation

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When the compressor isn't operating

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A flashing amber LED on the PCM board indicates what?

Fault codes and operation

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Power on to the outdoor unit

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Successful communication with the other system products

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24 VAC Present at the outdoor unit

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All 26/24 SEER Greenspeed/Extreme units have a Braze Plate Heat Exchanger and an EXV?

Yes, all sizes have a Braze Plate Heat Exchanger and and EXV

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ONLY The 2 and 3 Ton have a Braze Plate Heat Exchanger and an EXV

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ONLY The 5 ton machine has a Braze Plate Heat Exchanger and an EXV

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ONLY The even size machines have a Braze Plate Heat Exchanger and an EXV

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ONLY The 5-Stage equipment has the Braze Plate Heat Exchanger and an EXV

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The PCM board was formerly know as the ____________ board?

Defrost board

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MOC board

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AOC board

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Inverter

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The PCM board has _____ fuse/s?

1 non-replaceable fuse for incoming power

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2 fuses

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3 fuses

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4 fuses

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With the Bluetooth module you can_______________?

Update the outdoor unit software/firmware

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See live operating pressures

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See unit fault history

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See voltages

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All of the above

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The crankcase heater is energized when the outdoor temperature drops below __________°?

45°

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50°

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55°

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60°

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These units use a 5vdc output discharge and suction pressure transducer, what is the vdc range expected to be seen?

2.5-5vdc

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0-5vdc

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2-10ma

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4-20ma

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What version of software MUST the UI be updated to?

3.62 or higher

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4.05 or higher

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3.00 or higher

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As long as as it is a communicating UI it will work

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What is the MAX. outdoor ambient temperature for cooling mode?

116°

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125°

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105°

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130°

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What is the MAX outdoor ambient temperature for heating mode?

66°

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60°

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70°

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72°

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What is the maximum equivalent length of lineset allowed on 26/24 SEER Greenspeed Units?

80'

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120'

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250'

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As long as my lines are sized accordingly, it doesn't matter

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Where is it recommended to install the filter/drier on the 5 ton unit?

Near the indoor coil

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Near the outdoor unit

Correct Incorrect Correct answer

A filter/drier is not required for these units

Correct Incorrect Correct answer

At the easiest location

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What does the solid red LED indicate?

Alarm status

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Power at the inverter

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Not communicating

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In heating mode

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What is the maximum equivalent line length for the 5-stage unit?

85'

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100'

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150'

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200'

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What is the fastest way to update the UI software?

Using Wi-Fi

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Using your phone hotspot

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Using a MicroSD Card

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The UI should have the most current version of software so I don't need to update it

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What voltage should you measure when checking on the “A” to “B” terminals when power is applied and a User Interface is connected?

0-10vdc

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~2.5 to 3.9vac

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~0.1 to 0.9vdc

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~2.5 to 3.9vdc

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How many steps does it take for the stepper motor on the EXV to go from fully open to fully closed?

575

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475

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350

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625

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What is the Bluetooth signal range?

50'

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10'

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25'

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100'

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Line of sight

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What position is the EXV in during cooling mode?

Open

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Closed

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Depends on the demand

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What is the correct answer using the formula below when testing a transducer? Your measured output vdc on white and black is 2.5vdc

Suction Pressure psig = 50.0 x (DCV out – 0.5)

150psig

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125 psig

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100 psig

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75 psig

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Which of the following is not a method to provide updates?

OTA – Over the Air

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MicroSD™

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USB cable

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BTM – Bluetooth® Module

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At what range of RPM’s does the ECM motor operate at?

500 to 1050 RPM

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200 to 1500 RPM

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1075 RPM

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It is a PSC motor

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How many components are updatable in a 26/24 SEER Greenspeed/Extreme system?

1

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2

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3

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4

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What is the default defrost interval set at?

120 minutes

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90 minutes

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60 minutes

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30 minutes

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Auto

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Which thermistor is NOT a 10k NTC resistor in Inverter driven units?

OAT = Outdoor Ambient Temperature
OCT = Outdoor Coil Temperature
OST = Outdoor Suction Temperature
ODT = Outdoor Discharge Temperature

OAT

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OCT

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OST

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ODT

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What voltage should you measure when checking on the “A” to “B” terminals when power is applied and NO User Interface is connected?

0-10vdc

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~3vac

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~3vdc

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24vac

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What is the method to recall fault codes when there are no fault code present at your time of service?

Place a jumper wire across the force defrost pins and read the recent fault code

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Power the unit down, place a jumper on the force defrost pins and power the unit back on and read the recalled fault code

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Look at the last 10 system events in the User Interface

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There is no way to recall fault codes once power has been cycled

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How do you read the active fault codes using the status LED on the control boards?

Count the fast/short flash 1st then slow/long flash 2nd and add the two together to get your fault code

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Count the fast/short flash 1st then slow/long flash 2nd and that is your fault code. Fast is 1st and slow is 2nd 1 short flashes followed by 6 long flashes indicates a 16 fault code

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Look at the last 10 system events in the User Interface

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Read the scrolling matrix display on the board

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When checking a transducer that has power while connected to the ODU board and power is applied, what color wires would you check for your voltage output?

White and black (ground)

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White and red

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Black (ground) and red

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At what pressure does the High Pressure Switch open at?

480 psig

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600 psig

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570 psig

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670 psig

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2024 Inverter Driven Unit – Live

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