2023 Ductless Service Training Day 1 Quiz

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Question 1 of 25

1. Question

No matter where you read the current fault code (indoor, outdoor or wall control) the fault code will always be the same?

True
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False
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Question 2 of 25

2. Question

Some fault codes may be indicated by flashing LED’s on the indoor or outdoor boards?

True
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False
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Question 3 of 25

3. Question

To properly charge a unit you must know the __________.

super heat
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sub-cool
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line lengths
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speed of the compressor
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suction pressure
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Question 4 of 25

4. Question

The 601, 701 and 801 controls are

all 5 volts DC
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all 12 volts DC
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Interchangeable
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all 24 volt AC
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unit specific
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Question 5 of 25

5. Question

A 24 volt interface is used _______________

anytime you want to use a 24 volt thermostat.
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to make the system more efficient.
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if the ductless outdoor is paired with a standard air handler or gas furnace.
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all of the above.
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A & B
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A&C
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Question 6 of 25

6. Question

A wireless control is used for __________________

mode and temperature control.
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system setup.
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service data.
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all of the above.
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A & C
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B & C
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Question 7 of 25

7. Question

The new service codes are _______________

Error or Fault
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Protection or Limit
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Error, Protection. Fault and Limit
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Error and Limit
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Error, Protection. Fault
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Error, Protection and Limit
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Question 8 of 25

8. Question

The second digit of the Error code shows ____________

equipment where the fault occured.
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mode when the fault occurred
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hour when the fault occurred.
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the specific fault.
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Question 9 of 25

9. Question

A function code will

always shut down the system.
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give operating information.
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lock system in cool mode.
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lock system in heat mode.
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Question 10 of 25

10. Question

The most common fault on start up is ________________

low charge.
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over charge
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compressor failed.
Correct Incorrect Correct answer

communication fault.
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Question 11 of 25

11. Question

Standard wiring between the indoor and the outdoor is ________.

18 gauge thermostat wire
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14/3 with ground solid wire
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14/3 with ground stranded wire
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16/3 shielded wire
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it does't matter as long as it is good
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Question 12 of 25

12. Question

If there is high electromagnetic interference (EMF) causing communication issues you should

replace the indoor board.
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install 14/2 shielded wire on 2(L2) and 3(S).
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replace outdoor board
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replace outdoor unit
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replace indoor unit.
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Question 13 of 25

13. Question

If you need to splice the communication wires you may

solder the wires
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use wire nuts
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use butt connectors
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not splice
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Question 14 of 25

14. Question

Communication is carried on which wires?

S (3)
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S(3) & ground
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L1 (1) and S (3)
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L2 (2) and S (3)
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Question 15 of 25

15. Question

An external drain safety should break?

S (3)
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L1 (1)
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L2 (2)
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Internal shut down terminals
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Question 16 of 25

16. Question

Communication voltage is?

about 24 VAC
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about 50 VDC positive
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alternating between about +50 to -50 VDC.
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about 50 VDC negative.
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Question 17 of 25

17. Question

Induced current on the S (3) wire is due to?

bare spots in the insultation of the wire.
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magnetic field induced to wire if it is twisted around the power wire.
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incoming voltage above 250 volts.
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failed reactor.
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Solar flares
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Question 18 of 25

18. Question

Which indoor units have a display board?

All of them.
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High wall and cassette
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Cassette and console.
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Console and ducted.
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High wall and ducted.
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Question 19 of 25

19. Question

Ductless outdoor units have

1 board
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2 boards
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3 boards
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up to 3 boards
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Question 20 of 25

20. Question

Static pressure can be set on the _____________

Cassette unit.
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ducted unit.
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console unit.
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high wall unit.
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1 & 3
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2 & 4
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Question 21 of 25

21. Question

Anti cold air function is to _______________

keep from blowing cold air during heat mode.
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shut down unit when blows too cold of air during cooling.
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speed up the fan so it does not blow too cold of air.
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bring on electric heat during defrost to offset the cold air.
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Question 22 of 25

22. Question

As shipped from the factory, in cool mode the indoor fan in auto selection

shuts off when temperature is satisfied.
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runs 90 seconds after temperature is satisfied.
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Runs continuous at minimum speed
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runs continuous at high speed.
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Question 23 of 25

23. Question

All of the outdoor units have

Display boards.
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Diagnostic lights.
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Board and lights.
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board and/or lights.
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Question 24 of 25

24. Question

On the 24 volt interface a code reading 20 means_______.

the compressor is running at 20 HZ.
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system is running at 20% capacity.
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board is mounted upside down and system is cool mode.
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board is mounted upside down and system is heat mode.
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Question 25 of 25

25. Question

The term ductless system means

there is no duct work.
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there may be ductwork but the indoor communicates directly to the outdoor unit.
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the out door unit is classified as part of a ductless system but the indoor may be ductless or ducted.
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Is getting more confusing as more products are being added.
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3&4
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All of the above.
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