Newly Commissioned 110V System Not Powering On

Troubleshooting: 110V System Not Powering On

1. Check Power Requirements:
   Start by inspecting the nameplate on the right side of the outdoor unit for the system’s power requirements. Follow the manufacturer's specifications. For 110V systems, a single-pole breaker is required with one hot wire, one neutral, and a ground wire.

2. Verify Power Supply:
   If the system isn’t powering on, use a multimeter set to AC current to check the incoming power. Measure between L and G; the reading should be 110V. Any other voltage is incorrect. A 0V reading indicates a power supply issue.

   • If you get 0V, check the power at the electrical panel. If it still reads 0V, confirm the panel is supplying 110V. If not, consult a qualified electrician, as this can be hazardous.

3. Check Indoor Unit:
   If the power supply reads 110V, go to the indoor unit and press the auto-cool button. This will set the unit to an automatic 76°F (24°C) mode, and you should hear a beep.

   • If the LED screen doesn’t light up, disconnect and reconnect the unit. If it still doesn’t turn on, the screen may need replacement.

   • If the LED screen lights up, check the remote control batteries and try using the remote again. If the unit still doesn’t respond, the issue could be with the remote control or the infrared receiver on the LED display.

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*Please note these procedures must be performed by a certified HVAC contractor.