1500 <1600> (U7) Superheat due to low discharge temperature trouble

What does 1500 <1600> (U7) mean?

This error indicates an issue with superheat due to an abnormally low discharge temperature. This can be caused by problems with the TH4 sensor, its holder, or issues with the LEV (Linear Expansion Valve) coil or connector.

• Disconnection or loose connection of TH4 sensor.
• Defective holder of TH4 sensor.
• Disconnection of LEV coil.
• Disconnection of LEV connector.
• LEV performance failure.

Click steps to track your progress.

1. 1

   Turn off the power to the outdoor unit at the circuit breaker.

2. 2

   Check the TH4 sensor (outdoor unit discharge temperature sensor) for any loose or disconnected wiring.

3. 3

   Ensure the holder for the TH4 sensor is secure and intact.

4. 4

   Inspect the LEV (Linear Expansion Valve) coil and its connector for any disconnections or damage.

5. 5

   Restore power. If the problem recurs, a qualified technician will need to test the sensors and LEV for proper operation.