Newly Commissioned 220V System Not Powering On

Troubleshooting: 220V System Not Powering On

1. Check Power Requirements:
   Start by inspecting the nameplate on the right side of the outdoor unit. It provides essential details on the system’s power requirements, which must match the manufacturer’s specifications. All 220V systems require a double-pole breaker with two hot wires and a ground wire (no neutral).

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 L1 and L2; the reading should be 220V. Any other value indicates a problem. A 0V reading means there is no power to the outdoor unit, possibly due to incorrect wiring or issues in the disconnect box.

   • If you get 0V, check the power supply at the electrical panel. If it still reads 0V, ensure the panel provides 220V power. Consult a qualified electrician if there's a discrepancy, as this can be hazardous.

3. Check Indoor Unit:
   If the power supply reads 220V between L1 and L2, proceed to the indoor unit. Press the auto-cool button once, setting the unit to an automatic 76°F (24°C) mode. Listen for a beep.

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

   • If the LED screen works, check the remote control batteries and try using the remote again. If the unit remains unresponsive, the issue could be with the remote control or the infrared receiver on the LED display.

To order a replacement part or to get further assistance in diagnosing your unit, please contact one of our support representatives by submitting a ticket using the link below.

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