Power Problems That Could Be Impacting Your Atlanta HVAC Equipment

Power Switch As Symbol For Energy And Industry

A circuit breaker trips and shuts down your entire HVAC system.

A variable frequency drive fails to alter the speed of the fan that’s controlling the airflow.

Programmable controls suddenly experience problems.

No matter what issue you’re currently facing with your Atlanta HVAC equipment, it’s causing problems in the way you operate your building. Troubleshooting isn’t an easy process; each problem can have its own unique set of circumstances.

Yet as an HVAC technician, the bottom line in many cases leads to power quality issues.

Electronics are the foundation of most appliances used to operate a business every day. Programmable controls, sensors, variable frequency drives, fans, pumps, and more are all susceptible to problems in the connection. And the newer the equipment is that is being used, the more vulnerable you are to having your HVAC equipment impacted by voltage and current issues.

Electronic equipment operates by taking in alternating current and converting it to direct current for use by electronic equipment. This process also creates harmonic currents that feedback into the system. If these currents exceed normal levels, they can cause overheating and also distort sine waves of the electronics.

All HVAC electrical and electronic equipment has specified supply parameters. If equipment does not operate within these guidelines, the equipment will not operate properly as designed. In some cases, the equipment may act erratically with just hints of problems within the system. At other times, the equipment can fail altogether.

When you begin noticing issues, verify the electrical supply parameters are being met. AC input voltage must fall within 10 percent of rated voltage at rated frequency. For example, if the equipment is rated at 208 volts, the supply voltage must fall between 187 and 229 volts. It’s common to find low voltages when troubleshooting equipment.

If supply voltage is low, two problems typically occur.

Electronics will not function properly as the controls will not have sufficient voltage to operate at normal levels.

The motor life may be shortened.

This plays out in having equipment that acts unpredictably in the best of circumstances, or won’t function at all at its worst.

While many Atlanta HVAC companies troubleshoot issues by checking fuses and merely test for the presence of voltage at a contactor. Today’s top HVAC contractors understand the problem often extends to a power problem and must have knowledge in power supplies as well. The more electronic controls are put into building operations, the more power quality issues will arise.

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Think electrical problems might be causing your HVAC system to malfunction? Contact our electricians and HVAC contractors today at 770-913-6412!

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