INVIRTER TYPE OF KOPPEL AIRCON DISPLAYED EC WHEN PLUG A SWITCH BUT ONLY EC WHERE FLASH THEN SHUT OFF

You have a code that doesn't exist

http://errorcodeairconditioning.blogspot.com/2021/12/koppel-air-conditioner-error-codes.html

https://www.google.com/search?q=Koppel+Super+inverter+split+type+Air+Conditioner.+It+has+a+P9+error+code

..

Possibly outdoor unit faulty (for old communication protocol) according to the manual at the link below:

https://www.manualslib.com/manual/1232215/Koppel-Kv24-Odu-Arf21c.html?page=105

Press the on/off but on for two to four seconds when it clicks leave it see blink three times then switch it's power switch off for five minutes and start the aircon by switching on it's power and put on the aircon using the remote.

Search online for "error code *** +your make and model".

E1 Indoor / outdoor units communication error. https://acerrorcode.com/koppel-super-inverter-ac-error-codes.html

Air Conditioning Fault Codes

Wrong Category, try the AC category for a AC expert

Hello there.. :) your room 30 sq. meters needs 2 - 2hp window type aircon as computed. But you can consider the purpose of putting up the aircon and how many occupants will stay.. :0
For the model:
NATIONAL, 2HP, Model CW-1808VPH 2HP LG Window Type Aircon Manual 2HP Koppel Aircon w/ remote model: KWR-18R1
or check the internet for other models that you want.. :)

The first thing that can be done is to get your old remote into action. so try to repair the remote with tips from this link.

http://www.fixya.com/support/r6178946-tips_repair_remote_controller

You have to check your local store for a universal type that will match , ask for demo to confirm.