Air Conditioner Communication testing using the Refco tool

Split AC communication testing using the Refco tool

PS my hands were no where near the electrical connections , they appear super-imposed from close view camera.

Note : Live power testing should always be the last option.... and only done by those who are electrically qualified/licensed. This video was believed to be correct at the time of publication and is intended only as independent review information. No responsibility taken for any errors. Please refer to the manufacturer for specific tool use details and instructions.

[chrisburn]

Hi Dennis I know this is a little late but Nice informative video thxs!!

[johnw]

BOTH LED ARROWS SHOULD BE FLASHING here. The data is bi directional on the same wire. My understanding is that one LED means positive half cycle data transmitted in one direction and the other LED means negative half cycle data pulses in the other direction. ( indoor unit to outdoor unit or visa versa) See "Refco data flow test module" video at 1.08 minute mark..

[terrorian]

Hello Dennis, I recently bought this device and when I try to check the data flow between idu and odu both data lights aren't flashing but they are just turned on.
I've seen many videos but I still can't solve the problem. Any ideas on what's going on with my device?

[adambarrett]

Would this type of tool be necessary for residential diagnostics?

[chinyanyie]

Can this test directly on the compressor?because I have a Fujitsu mini split inverter keep having faulty PCB board, some say because maybe the compressor has kind of sorting or something but when replaced the PCB the compressor running very smooth and very cold

[sergiopinheiro]

Good night. Vx could provide the schematic of this test.
Or sell. And the schematic of this inverter test that vx uses to diagnose errors both ipm, serial, and so on. This device in this box. Thanks for the Daikin Service Manual.

[petrisorclaudiu]

Hello, my name is Claudius and I'm from Romania and I can tell you if this tester can help me to find out the cause of the problem if an air does not start and gives me an error. I have a problem with an air of NEO brand INVERTER 12000 btu, you start on cold starts the fan and after 5 seconds without having to start the compressor or outdoor fan shows me F1. Temperature sensors are good, 5 kohm inner and out of 5 and 50 kohm compressor outlet.

[gambler]

Can this meter be used in checking refrigerator inverters? 🤔

[sergiopinheiro]

sera que vx poderia vender o esquema eletrico desse teste inverter

[imbackbhai]

Sir plz .i want to purchase this product

[andyreyes]

i see it only comunicates on postivite dc voltage

[sergiopinheiro]

Boa noite . Vx teria esquema eletrico do aparelho.