How can we help?
You can also find more resources in our
Select a category
Something is confusing
Something is broken
I have a suggestion
What is your email?
What is 1 + 3?
Unit 15 Troubleshooting Basic Controls
Section 3: Basic Automatic Controls
Commonly referred to as VA. This rating can be used to determine whether the transformer is underrated or drawing too much current.
40 VA/24V = 1.66 A
The meter is reading one side of the line straight from the transformer and on the other side of the line. (24 V)
This device measures resistance in a circuit.
Measurement of infinite ohms.
Normally open set of contacts.
Normally closed set of contacts.
Pictorial Wiring Diagram
Used to locate the different components in the circuit.
Line Wiring Diagram
Often referred to as the ladder diagram, used to determine circuit functions.