E49 - Low pressure fault or low voltage detected

What does E49 mean?

This error indicates either a low-pressure condition within the refrigerant system or that a low voltage has been detected in the electrical system.

• Refrigerant leak or insufficient refrigerant charge (causing low pressure).
• Unstable or low main power supply voltage.
• Faulty low-pressure sensor.
• Problem with electrical wiring or connections leading to low voltage.

Click steps to track your progress.

1. 1

   Turn off the main power to the AC system at the circuit breaker.

2. 2

   For low voltage, have an electrician check the main power supply voltage to the outdoor unit.

3. 3

   For low pressure, contact a qualified HVAC technician to check refrigerant levels and inspect for leaks.

4. 4

   Do not operate the unit with low refrigerant or unstable voltage, as it can cause further damage.