Troubleshooting- Electrical Problems

What is one category of electrical problems in refrigeration and HVAC systems?

• Failure to heat

• Failure to cool

• Failure to maintain temperature

• Failure to operate

What is a common symptom of erratic operation in HVAC systems?

• Unit operates at low voltage

• Unit starts and stops unpredictably

• Unit operates continuously

• Unit does not operate at all

Which troubleshooting method focuses on identifying the root cause of a problem?

• Root cause troubleshooting

• Checklist method

• Point-to-point testing

• Cause and effect testing

What is the first step in the common troubleshooting process?

• Identify the problem

• Test the equipment

• Know the equipment and system

• Fix the problem

What can cause low voltage in an HVAC system?

• High voltage supply

• Loose connections

• Overloaded circuits

• Faulty transformers

What happens when a fuse blows in an electrical circuit?

• It can be reused

• It requires replacement

• It indicates a short circuit

• It resets automatically

What is the purpose of a safety switch in HVAC systems?

• To increase voltage

• To enhance performance

• To regulate temperature

• To interrupt power to the equipment

What type of overload is found inside a motor or compressor?

• Mechanical overload

• Electrical overload

• Thermostatic overload

• External overload

What is a common fault in relays and motor starters?

• Burned coils

• Loose wiring

• Excessive lubrication

• Faulty sensors

What does a capacitor do in a motor circuit?

• Regulates temperature

• Acts as a fuse

• Improves starting and running characteristics

• Increases voltage