Upper lamp ON, lower lamp blinking — Mode conflict detected

What does Upper lamp lights and lower lamp blinks 2.5-second OFF mean?

The outdoor unit operates, but the indoor unit does not. This happens when indoor units are set to conflicting modes like COOL (including DRY) and HEAT simultaneously. The first unit to operate sets the priority.

• Different indoor units set to COOL and HEAT modes
• DRY mode selected while another unit is in COOL mode

Click steps to track your progress.

1. 1

   Unify the operation mode for all indoor units.

2. 2

   Ensure all units are set to either COOL or HEAT mode.

3. 3

   Refer to the outdoor unit service manual for mode settings.