Red LED flashes three times — Short cycling lockout

What does Red LED 3 flashes mean?

The compressor is locked out due to excessive short cycling. This occurs when the 'Short Cycling' DIP switch is ON and the compressor cycles on and off too frequently (less than 1 minute runtime) within a 24-hour period. A power cycle is required to clear the lockout.

• Compressor short cycling frequently
• Short Cycling DIP switch is set to ON
• Incorrect system settings or demand

Click steps to track your progress.

1. 1

   Ensure the 'Short Cycling' DIP switch is set correctly.

2. 2

   Cycle power to the module (disconnect T2 or T1 for 5 seconds) to clear lockout.

3. 3

   Verify proper wiring connections.

4. 4

   Address the cause of excessive short cycling (e.g., undersized system, thermostat settings).