Service manual

ESIE03–01 Error Codes: Indoor Units

Part 3 – Troubleshooting 3–27

2.3 Malfunctioning Drain Water Level System (A3)

Error code A3

LED indications The table below shows the LED indications.

Error generation The error is generated when the water level reaches its upper limit and when the float switch turns

OFF.

Causes The possible causes are:

P Malfunctioning drain pump

P Improper drain piping work

P Drain piping clogging

P Malfunctioning float switch

P Malfunctioning indoor unit PCB

P Malfunctioning short-circuit connector X15 on PCB.

Operation HAP (green) HBP (green)

Normal

Malfunctioning