C4 error in indoor bluestar vrf a.c.__ - Heating & Cooling

I answered this earlier and still no model number.

Samsung DVM S Error Code Booklet

GT Phelan https://gtphelan.ie > uploads > 2019/07 > DVM-... PDF Welcome to the new Samsung Error Code Booklet, for our repair network. This booklet has been designed to offer on site assistance for fault code.
39 pages

Samsung VRF Air Conditioner Fault Codes

samsungvrf.com.tr https://www.samsungvrf.com.tr > samsung-vrf-klima-a...
Samsung VRF Service Fault Codes and Solutions ; 147, Closed EVA2_in Sensor Break Away Error ; 148, Closed EVA2_OUT Sensor Break Away Error ; 149, AHU Master Indoor ...

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it is not a computer, moved yah.
air conditioning , not here. located in what country?
DSAI-1982R3A (true model #)


https://5.imimg.com/data5/SELLER/Doc/2021/9/ZW/HZ/UL/29765426/bluestar-vrv-system.pdf

21HP is 198000 BTU/hr, large 16TONS
C4
Communication Error (Between Inverter drive and ID)
rodents eat the wires? etc.

the PDF see last page, see phones to call
your huge HVAC system needs service.

Temp sensor, bad motor, bad control board…too complex you need help. Your outdoor unit will have a better diagnostic code to hopefully narrow the problem but this requires opening of machine.

Assuming you have a mini split and not a VRF system (although it is possible the error codes are the same),the h11 code typically indicates a communications problem between the indoor and outdoor units. This could be due to loose or broken wiring, a bad connection at either end or possibly a bad communications board in either the indoor or outdoor unit.

Blue Star vrf caset ac L7 error not indoor opret

Blue star VRF AC C0 error code whats happened

Will the instructions help you?

http://www.orionair.co.uk/PDF/lg%20multi%20fault%20codes.pdf

It is full.

Voltas VRF indoor unit E0 error code sho