2023 Inverter Driven Unit – Live – Carrier Enterprise South Central Technical Support

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Question 1 of 40

1. Question
One of the best ways to get information on Carrier & Bryant equipment is to _____________________.
- Download and Use the Carrier/Bryant Mobile App
- Search on Google
- Call tech support
- Ask my boss/supervisor
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Question 2 of 40

2. Question
On the the Carrier/Bryant Mobile App what features are available?
- Barcode scanning of unit’s serial or model number
- Literature list for models and ability to search all available literature
- Product Catalog model lookup
- Bill of Material parts list including part supersession
- Warranty entitlement & service history
- Aftermarket components cross reference tool
- Distributor store locator
- Tech Tips videos for installation guides, troubleshooting help and best practices
- Instant authentication with support for fingerprint and facial recognition on compatible devices
- Interactive Troubleshooting tool
- All of the above
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Question 3 of 40

3. Question
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
- Has Bluetooth technology to aid in diagnostics
- Is round shaped
- Has a ceramic coated condenser coil.
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Question 4 of 40

4. Question
Where is it recommended to install the filter/drier on the 4 ton unit and smaller?
- Near the indoor coil
- Near the outdoor unit
- A filter/drier is not required for these units
- At the easiest location
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Question 5 of 40

5. Question
What terminals are required to be hooked up for proper operation in a communicating system?
- A & B
- A, B & C
- A, B, C & D
- A, B + Shield
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Question 6 of 40

6. Question
What is the purpose of the Braze Plate Heat Exchanger in the 5 ton machines?
- Help with refrigerant noise
- Increase capacity
- Keep refrigerant from migrating
- No longer require an accumulator
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Question 7 of 40

7. Question
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
- Has Bluetooth technology to aid in diagnostics
- Is round shaped
- Has a ceramic coated condenser coil.
Correct

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Question 8 of 40

8. Question
What does the PCM sense to control the EXV in heating mode?
- Indoor static pressure
- suction pressure and temperature
- Discharge temperature and pressure
- Outdoor ambient temperature
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Question 9 of 40

9. Question
The green LED on the PCM board indicates what?
- Fault codes
- Power on to the outdoor unit
- Successful communications
- 24 VAC Present at the outdoor unit
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Question 10 of 40

10. Question
When does the ECM fan motor NOT operate?
- Off cycle and defrost
- Low ambient condition
- Defrost and during low ambient operation
- When the compressor isn't operating
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Question 11 of 40

11. Question
A flashing amber LED on the PCM board indicates what?
- Fault codes and operation
- Power on to the outdoor unit
- Successful communication with the other system products
- 24 VAC Present at the outdoor unit
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Question 12 of 40

12. Question
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
- ONLY The 2 and 3 Ton have a Braze Plate Heat Exchanger and an EXV
- ONLY The 5 ton machine has a Braze Plate Heat Exchanger and an EXV
- ONLY The even size machines have a Braze Plate Heat Exchanger and an EXV
- ONLY The 5-Stage equipment has the Braze Plate Heat Exchanger and an EXV
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Question 13 of 40

13. Question
The PCM board was formerly know as the ____________ board?
- Defrost board
- MOC board
- AOC board
- Inverter
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Question 14 of 40

14. Question
The PCM board has _____ fuse/s?
- 1 non-replaceable fuse for incoming power
- 2 fuses
- 3 fuses
- 4 fuses
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Question 15 of 40

15. Question
With the Bluetooth module you can_______________?
- Update the outdoor unit software/firmware
- See live operating pressures
- See unit fault history
- See voltages
- All of the above
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Question 16 of 40

16. Question
The crankcase heater is energized when the outdoor temperature drops below __________°?
- 45°
- 50°
- 55°
- 60°
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Question 17 of 40

17. Question
These units use a 5vdc output discharge and suction pressure transducer, what is the vdc range expected to be seen?
- 2.5-5vdc
- 0-5vdc
- 2-10ma
- 4-20ma
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Question 18 of 40

18. Question
What version of software MUST the UI be updated to?
- 3.62 or higher
- 4.05 or higher
- 3.00 or higher
- As long as as it is a communicating UI it will work
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Question 19 of 40

19. Question
What is the MAX. outdoor ambient temperature for cooling mode?
- 116°
- 125°
- 105°
- 130°
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Question 20 of 40

20. Question
What is the MAX outdoor ambient temperature for heating mode?
- 66°
- 60°
- 70°
- 72°
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Question 21 of 40

21. Question
What is the maximum equivalent length of lineset allowed?
- 80'
- 120'
- 250'
- As long as my lines are sized accordingly, it doesn't matter
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Question 22 of 40

22. Question
Where is it recommended to install the filter/drier on the 5 ton unit?
- Near the indoor coil
- Near the outdoor unit
- A filter/drier is not required for these units
- At the easiest location
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Question 23 of 40

23. Question
What does the solid red LED indicate?
- Alarm status
- Power at the inverter
- Not communicating
- In heating mode
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Question 24 of 40

24. Question
What is the maximum equivalent line length for the 5-stage unit?
- 85'
- 100'
- 150'
- 200'
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Question 25 of 40

25. Question
What is the fastest way to update the UI software?
- Using Wi-Fi
- Using your phone hotspot
- Using a MicroSD Card
- The UI should have the most current version of software so I don't need to update it
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Question 26 of 40

26. Question
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
- ~2.5 to 3.9vac
- ~0.1 to 0.9vdc
- ~2.5 to 3.9vdc
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Question 27 of 40

27. Question
How many steps does it take for the stepper motor on the EXV to go from fully open to fully closed?
- 575
- 475
- 350
- 625
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Question 28 of 40

28. Question
What is the Bluetooth signal range?
- 50'
- 10'
- 25'
- 100'
- Line of sight
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Question 29 of 40

29. Question
What position is the EXV in during cooling mode?
- Open
- Closed
- Depends on the demand
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Question 30 of 40

30. Question
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
- 125 psig
- 100 psig
- 75 psig
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Question 31 of 40

31. Question
Which of the following is not a method to provide updates?
- OTA – Over the Air
- MicroSD™
- USB cable
- BTM – Bluetooth® Module
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Question 32 of 40

32. Question
At what range of RPM’s does the ECM motor operate at?
- 500 to 1050 RPM
- 200 to 1500 RPM
- 1075 RPM
- It is a PSC motor
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Question 33 of 40

33. Question
How many components are updatable in a 26/24 SEER Greenspeed/Extreme system?
- 1
- 2
- 3
- 4
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Question 34 of 40

34. Question
What is the default defrost interval set at?
- 120 minutes
- 90 minutes
- 60 minutes
- 30 minutes
- Auto
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Question 35 of 40

35. Question
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
- OCT
- OST
- ODT
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Question 36 of 40

36. Question
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
- ~3vac
- ~3vdc
- 24vac
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Question 37 of 40

37. Question
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
- Power the unit down, place a jumper on the force defrost pins and power the unit back on and read the recalled fault code
- Look at the last 10 system events in the User Interface
- There is no way to recall fault codes once power has been cycled
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Question 38 of 40

38. Question
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
- 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
- Look at the last 10 system events in the User Interface
- Read the scrolling matrix display on the board
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Question 39 of 40

39. Question
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)
- White and red
- Black (ground) and red
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Question 40 of 40

40. Question
At what pressure does the High Pressure Switch open at?
- 480 psig
- 600 psig
- 570 psig
- 670 psig
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2023 Inverter Driven Unit – Live

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