Deck 18: Troubleshooting Refrigeration, Heating, and Air-Conditioning Control Circuits and Systems

Question 1

Because electric motors are inexpensive, there is no real need to troubleshoot them.

Answer 1

False

Question 2

Volt-ohm meters only measure volts and ohms.

Answer 2

False

Question 3

The most important tools that the technician has for troubleshooting are electric meters.

Answer 3

True

Question 4

What two types of meters are commonly used in the industry?

Question 5

The ____________________ type of diagram asks questions that require a response before the technician proceeds to the next step.

Question 6

Troubleshooting the electrical control circuits in a cooling, heating, or refrigeration system is basically common sense.

Question 7

After determining that voltage is available to the control circuit of a residential air-conditioning system, what four devices should be checked when troubleshooting the system?

Question 8

The electric motor is the smallest load used in most heating, cooling, and refrigeration systems.

Question 9

Most diagrams have a(n) ____________________ that helps the technician to interpret the abbreviations used in the diagram.

Question 10

The low-voltage thermostat used on residential and light commercial conditioned air systems is difficult to diagnose because of its complexity and the fact that it is used for several purposes in a heating and cooling system.

Question 11

Electric switching devices such as contactors and relays rarely cause electrical problems.

Question 12

A(n) ____________________ chart is a graphical representation of a troubleshooting procedure for a particular unit.

Question 13

Explain the purpose of the electronic self-diagnostic feature. How does it communicate results?

Question 14

Troubleshooting charts usually need to be ordered because they are not included with equipment at the time of shipment.

Question 15

Manual switches are basic devices that are used to set the temperature of a motor.

Question 16

How are thermostats and pressure switches controlled?

Question 17

What is the first check that a technician should make on a service call?

Question 18

The electrical wiring diagram is the technician's primary tool in electrical troubleshooting.

Question 19

A(n) ____________________ is an overload device that senses the current draw of the compressor through the lockout loop (LL).

Question 20

The ____________________ diagram is a picture of the control panel and is sometimes called a component arrangement diagram.