Maintenance Scenario Assessment

You are about to start the maintenance on an HVAC-R system in SWFL. As you inspect the components, you notice some visible damage on the condenser coil fins. What should you do next? Choose the best option.

• Ignore the damage and proceed with maintenance.

• Document the damage and inform the customer after maintenance is complete.

• Use a soft brush to gently clean the damaged fins during maintenance.

• Replace the damaged condenser coil fins during maintenance.

During start-up procedures, you find that the system is producing unusual vibrations and loud noises. What action should you take? Choose the best option.

• Proceed with maintenance as usual.

• Ignore the noises and vibrations, as they are common.

• Diagnose the source of the noises and vibrations and take appropriate action.

• Complete the maintenance quickly and leave the site.

While cleaning the condenser coil, you notice that some vegetation has grown around the outdoor unit. What impact can this vegetation have on the system's performance? Choose the best option.

• Vegetation has no impact on the system's performance.

• Vegetation can help improve the system's energy efficiency.

• Vegetation can restrict airflow and reduce system performance.

• Vegetation helps protect the system from external elements.

As you perform start-up procedures, you notice that the system is not cooling or heating properly. What should be your next step? Choose the best option.

• Continue with maintenance and ignore the performance issue.

• Document the issue and inform the customer after maintenance.

• Transition from maintenance to a service call to diagnose and address the problem.

• Adjust the thermostat settings to compensate for the performance issue.

While inspecting the electrical connections, you find that some wires are loose and not properly secured. What action should you take? Choose the best option.

• Ignore the loose wires, as they have no impact on the system.

• Tighten the wires quickly during maintenance.

• Document the loose wires and inform the customer later.

• Secure and tighten the wires following proper procedures during maintenance.

During the operation check, you notice that the return air temperature is significantly higher than the supply air temperature. What could be a possible reason for this temperature difference?

• The temperature difference is normal and doesn't require any action.

• The supply air temperature sensor is faulty.

• The return air ducts are improperly sealed or insulated.

• The system is functioning correctly, and no action is needed.

As you clean the evaporator coil, you notice that it is covered in mold and biological growth. What action should you take? Choose the best option.

• Ignore the mold and continue with maintenance.

• Wipe off the mold without using any cleaning solution.

• Use a specialized coil cleaning solution designed for evaporator coils to remove the mold.

• Advise the customer to replace the entire HVAC-R system due to mold growth.

While performing maintenance on a commercial package unit, you notice that the blower motor is making a squealing noise. What could be a possible reason for this noise, and what action should you take? Choose the best option.

• The noise is normal during operation; no action is needed.

• The blower motor bearings may be worn out; lubricate them following manufacturer guidelines.

• The refrigerant level is too high, causing the noise; release some refrigerant to reduce noise.

• The noise is due to birds nesting inside the unit; ignore it as it will go away on its own.

During maintenance, you find that the air filter is heavily clogged with dirt and debris. What impact can a clogged air filter have on the system? Choose the best option.

• A clogged air filter has no impact on system performance.

• A clogged air filter improves indoor air quality.

• A clogged air filter reduces airflow, leading to reduced system efficiency.

• A clogged air filter helps maintain consistent temperature control.

While cleaning the condensate drain line, you find that it is partially blocked and draining slowly. What action should you take? Choose the best option.

• Ignore the blockage, as it will clear up on its own.

• Use a strong chemical cleaner to clear the blockage.

• Flush the drain line with a mixture of warm water and mild detergent to while using a wet vac to pull through line.

• Advise the customer to replace the entire HVAC-R system due to the drain line blockage.