POWER lamp flashes (0.5s ON/0.5s OFF) — Miswiring or serial signal error

What does POWER lamp 0.5s ON/0.5s OFF mean?

The indoor and outdoor units do not operate. This indicates a problem with the wiring between the units or that the serial signal from the outdoor unit has not been received for 6 minutes. It can also occur if the indoor unit was previously connected to a non-low-standby-power model.

• Miswiring between the indoor and outdoor units.
• Serial signal from the outdoor unit is not being received.
• Indoor unit connection type mismatch (low-standby vs. non-low-standby).

Click steps to track your progress.

1. 1

   Turn OFF the main power supply to the unit.

2. 2

   Ensure all wiring connections between the indoor and outdoor units are secure and correct.

3. 3

   If the unit was recently reconnected, clear the error history by referring to 'Deleting the memorized abnormal condition' in manual section 10-2.1.

4. 4

   Turn the main power supply back ON and attempt to operate the unit.

5. 5

   If the lamp continues to flash, contact a qualified service technician.