2024 Ductless Service Training Day 2 Test

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

True

Correct Incorrect Correct answer

False

Correct Incorrect Correct answer

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

True

Correct Incorrect Correct answer

False

Correct Incorrect Correct answer

To properly charge a unit you must know the __________.

super heat

Correct Incorrect Correct answer

sub-cool

Correct Incorrect Correct answer

line lengths

Correct Incorrect Correct answer

speed of the compressor

Correct Incorrect Correct answer

suction pressure

Correct Incorrect Correct answer

The 601, 701 and 801 controls are

all 5 volts DC

Correct Incorrect Correct answer

all 12 volts DC

Correct Incorrect Correct answer

Interchangeable

Correct Incorrect Correct answer

all 24 volt AC

Correct Incorrect Correct answer

unit specific

Correct Incorrect Correct answer

A 24 volt interface is used _______________

anytime you want to use a 24 volt thermostat.

Correct Incorrect Correct answer

to make the system more efficient.

Correct Incorrect Correct answer

if the ductless outdoor is paired with a standard air handler or gas furnace.

Correct Incorrect Correct answer

all of the above.

Correct Incorrect Correct answer

A & B

Correct Incorrect Correct answer

A&C

Correct Incorrect Correct answer

A wireless control is used for __________________

mode and temperature control.

Correct Incorrect Correct answer

system setup.

Correct Incorrect Correct answer

service data.

Correct Incorrect Correct answer

all of the above.

Correct Incorrect Correct answer

A & C

Correct Incorrect Correct answer

B & C

Correct Incorrect Correct answer

The new service codes are _______________

Error or Fault

Correct Incorrect Correct answer

Protection or Limit

Correct Incorrect Correct answer

Error, Protection. Fault and Limit

Correct Incorrect Correct answer

Error and Limit

Correct Incorrect Correct answer

Error, Protection. Fault

Correct Incorrect Correct answer

Error, Protection and Limit

Correct Incorrect Correct answer

The second digit of the Error code shows ____________

equipment where the fault occured.

Correct Incorrect Correct answer

mode when the fault occurred

Correct Incorrect Correct answer

hour when the fault occurred.

Correct Incorrect Correct answer

the specific fault.

Correct Incorrect Correct answer

A function code will

always shut down the system.

Correct Incorrect Correct answer

give operating information.

Correct Incorrect Correct answer

lock system in cool mode.

Correct Incorrect Correct answer

lock system in heat mode.

Correct Incorrect Correct answer

The most common fault on start up is ________________

low charge.

Correct Incorrect Correct answer

over charge

Correct Incorrect Correct answer

compressor failed.

Correct Incorrect Correct answer

communication fault.

Correct Incorrect Correct answer

Standard wiring between the indoor and the outdoor is ________.

18 gauge thermostat wire

Correct Incorrect Correct answer

14/3 with ground solid wire

Correct Incorrect Correct answer

14/3 with ground stranded wire

Correct Incorrect Correct answer

16/3 shielded wire

Correct Incorrect Correct answer

it does't matter as long as it is good

Correct Incorrect Correct answer

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

replace the indoor board.

Correct Incorrect Correct answer

install 14/2 shielded wire on 2(L2) and 3(S).

Correct Incorrect Correct answer

replace outdoor board

Correct Incorrect Correct answer

replace outdoor unit

Correct Incorrect Correct answer

replace indoor unit.

Correct Incorrect Correct answer

If you need to splice the communication wires you may

solder the wires

Correct Incorrect Correct answer

use wire nuts

Correct Incorrect Correct answer

use butt connectors

Correct Incorrect Correct answer

not splice

Correct Incorrect Correct answer

Communication is carried on which wires?

S (3)

Correct Incorrect Correct answer

S(3) & ground

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L1 (1) and S (3)

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L2 (2) and S (3)

Correct Incorrect Correct answer

An external drain safety should break?

S (3)

Correct Incorrect Correct answer

L1 (1)

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L2 (2)

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Internal shut down terminals

Correct Incorrect Correct answer

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

bare spots in the insultation of the wire.

Correct Incorrect Correct answer

magnetic field induced to wire if it is twisted around the power wire.

Correct Incorrect Correct answer

incoming voltage above 250 volts.

Correct Incorrect Correct answer

failed reactor.

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Solar flares

Correct Incorrect Correct answer

Which indoor units have a display board?

All of them.

Correct Incorrect Correct answer

High wall and cassette

Correct Incorrect Correct answer

Cassette and console.

Correct Incorrect Correct answer

Console and ducted.

Correct Incorrect Correct answer

High wall and ducted.

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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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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

Correct Incorrect Correct answer

2 & 4

Correct Incorrect Correct answer

Anti cold air function is to _______________

keep from blowing cold air during heat mode.

Correct Incorrect Correct answer

shut down unit when blows too cold of air during cooling.

Correct Incorrect Correct answer

speed up the fan so it does not blow too cold of air.

Correct Incorrect Correct answer

bring on electric heat during defrost to offset the cold air.

Correct Incorrect Correct answer

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

shuts off when temperature is satisfied.

Correct Incorrect Correct answer

runs 90 seconds after temperature is satisfied.

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Runs continuous at minimum speed

Correct Incorrect Correct answer

runs continuous at high speed.

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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.

Correct Incorrect Correct answer

On the 24 volt interface a code reading 20 means_______.

the compressor is running at 20 HZ.

Correct Incorrect Correct answer

system is running at 20% capacity.

Correct Incorrect Correct answer

board is mounted upside down and system is cool mode.

Correct Incorrect Correct answer

board is mounted upside down and system is heat mode.

Correct Incorrect Correct answer

The term ductless system means

there is no duct work.

Correct Incorrect Correct answer

there may be ductwork but the indoor communicates directly to the outdoor unit.

Correct Incorrect Correct answer

the out door unit is classified as part of a ductless system but the indoor may be ductless or ducted.

Correct Incorrect Correct answer

Is getting more confusing as more products are being added.

Correct Incorrect Correct answer

3&4

Correct Incorrect Correct answer

All of the above.

Correct Incorrect Correct answer

The Debugger tool can be used to ramp the compressor up and down when attached to the outdoor unit?

True

Correct Incorrect Correct answer

False

Correct Incorrect Correct answer

The debugger tool can be used to simulate the indoor or outdoor unit to verify communication faults?

True

Correct Incorrect Correct answer

False

Correct Incorrect Correct answer

The The Debugger tool connects to

L1(1), L2(2) and S(3) terminals

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Outdoor main board

Correct Incorrect Correct answer

Retrieving data. Wait a few seconds and try to cut or copy again.

Correct Incorrect Correct answer

Fan driver board

Correct Incorrect Correct answer

All of the above

Correct Incorrect Correct answer

With the Debugger tool do you need an indoor unit connected to operate the outdoor unit?

Indoor unit must be piped in

Correct Incorrect Correct answer

indoor unit must be electrically connected

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indoor unit is not needed

Correct Incorrect Correct answer

Induced voltage on the S wire as low as 6 volts can interfere with communication.

True

Correct Incorrect Correct answer

False

Correct Incorrect Correct answer

The most frustrating codes to diagnose are

P4/P6

Correct Incorrect Correct answer

E1

Correct Incorrect Correct answer

F1, F2, F3 and F4

Correct Incorrect Correct answer

P4/P6 and E1

Correct Incorrect Correct answer

F codes and P1 and P2

Correct Incorrect Correct answer

The speed of the compressor is controlled by

length of time 6 switches in the IGBT are open and closed.

Correct Incorrect Correct answer

Retrieving data. Wait a few seconds and try to cut or copy again.

Correct Incorrect Correct answer

the AC voltage output of the board.

Correct Incorrect Correct answer

Multi-head ductless ________________

can heat and cool at the same time

Correct Incorrect Correct answer

will cool the room calling first then heat the next room

Correct Incorrect Correct answer

will heat the room calling first then cool the next room

Correct Incorrect Correct answer

go to stand by until all units are in the same mode

Correct Incorrect Correct answer

Using the wireless remote in the service menu you can program the blower from running continuously during the off cycle in cool mode

FALSE

Correct Incorrect Correct answer

True, but you shouldn't due to air circulation

Correct Incorrect Correct answer

With the ducted unit it is preferred to set static pressure by

Using the service menu and set manually

Correct Incorrect Correct answer

Always leave at factory setting

Correct Incorrect Correct answer

Automatic setting

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Use the dip switches on the control board

Correct Incorrect Correct answer

Using the System Enquiry function from the Multi-zone outdoor unit you can tell if you have your communication wiring matched to the correct piping?

TRUE

Correct Incorrect Correct answer

FALSE

Correct Incorrect Correct answer

On a 1-1 indoor coil freeze up fault is the same as refrigerant leak detection?

TRUE

Correct Incorrect Correct answer

FALSE

Correct Incorrect Correct answer

On a multi-zone any unit not calling will close its EEV

100%.

Correct Incorrect Correct answer

50%

Correct Incorrect Correct answer

10%.

Correct Incorrect Correct answer

3%.

Correct Incorrect Correct answer

left in last position.

Correct Incorrect Correct answer

When the unit is in protection mode, the unit will ___________.

Shut down and show a fault.

Correct Incorrect Correct answer

Continue to run at requested demand and show a fault

Correct Incorrect Correct answer

Run at a reduced demand without a fault

Correct Incorrect Correct answer

Run at a reduced demand and show a fault

Correct Incorrect Correct answer

Run at a reduced demand and may show a code

Correct Incorrect Correct answer

Compressor discharge protection starts at

194 degrees

Correct Incorrect Correct answer

150 degrees

Correct Incorrect Correct answer

215 degrees

Correct Incorrect Correct answer

239 degrees

Correct Incorrect Correct answer

High compressor discharge temperature is most likely caused by

Dirty outdoor coil in cool mode

Correct Incorrect Correct answer

Dirty indoor coil in heat mode

Correct Incorrect Correct answer

System overcharge

Correct Incorrect Correct answer

System Under charge

Correct Incorrect Correct answer

The condenser fan speed is controlled by the

Outdoor temperature

Correct Incorrect Correct answer

The indoor demand of the system

Correct Incorrect Correct answer

Compressor demand of the system

Correct Incorrect Correct answer

Outdoor coil sensor

Correct Incorrect Correct answer

All of the above

Correct Incorrect Correct answer

1 & 4

Correct Incorrect Correct answer

If the compressor temperature is between 215 and 229 degrees the compressor will

increase frequency to meet demand if the indoor system

Correct Incorrect Correct answer

decrease frequency to protect the compressor

Correct Incorrect Correct answer

hold frequency to provide comfort while protecting compressor

Correct Incorrect Correct answer

shut down until compressor cools

Correct Incorrect Correct answer

Where would you install a liquid line filter drier in a ductless system?

Liquid line outdoor

Correct Incorrect Correct answer

Liquid line indoor

Correct Incorrect Correct answer

Mixed phase line outdoor

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Mixed phase line indoor

Correct Incorrect Correct answer

You don't

Correct Incorrect Correct answer

The Check Point function on a multi-head

is for fault codes.

Correct Incorrect Correct answer

is for compressor operation.

Correct Incorrect Correct answer

is for outdoor unit operating status

Correct Incorrect Correct answer

is for indoor operating status.

Correct Incorrect Correct answer

All of the above.

Correct Incorrect Correct answer

On a multi-head outdoor unit the display normally

is blank.

Correct Incorrect Correct answer

shows a timer for the delay.

Correct Incorrect Correct answer

shows compressor HZ.

Correct Incorrect Correct answer

shows number of indoor units connected.

Correct Incorrect Correct answer

When using the check point function you can see

suction pressure.

Correct Incorrect Correct answer

head pressure

Correct Incorrect Correct answer

refrigerant charge amount

Correct Incorrect Correct answer

capacity of each indoor unit

Correct Incorrect Correct answer

When using the check point function you can see

total frequency demand of all indoor units

Correct Incorrect Correct answer

frequency of compressor after any limits

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capacity demand of each indoor unit

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all of the above.

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none of the above.

Correct Incorrect Correct answer

Using the check point function what would be the most useful point to check?

Compressor discharge temperature.

Correct Incorrect Correct answer

Compressor frequency.

Correct Incorrect Correct answer

Last error code.

Correct Incorrect Correct answer

EXV open angle

Correct Incorrect Correct answer

indoor coil temperature

Correct Incorrect Correct answer

Evaporator coil temperature.

Correct Incorrect Correct answer

When using the Debugger Tool you

Can use LNS and 5V at the same time.

Correct Incorrect Correct answer

can only use LNS or 5V independently.

Correct Incorrect Correct answer

Must have the switch in LNS before powering the outdoor unit

Correct Incorrect Correct answer

Must have the switch matching how you have it connected before powering the outdoor unit.

Correct Incorrect Correct answer

1&3

Correct Incorrect Correct answer

2&4

Correct Incorrect Correct answer

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