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Airsteve
13-03-2015, 06:34 AM
Hi all,

We sometimes get callouts to find a compressor over current fault on inverter heat pump splits. It would be nice to be able to prove the compressor is actually faulty before suggesting we replace it.
We always do the usual tests, insulation resistance, check windings between each other, has it been tripping the breaker etc.
We have had situations where clients have requested we replace the inverter module (to save $) before progressing to replacing the compressor. (Obviously we have pre-warned them of the risk they take)
A few times this has been successful, inverter board replaced, compressor running normal current draw, no more error codes, no call backs.
Is there a device which we could use to supply a digitally commutated power supply to prove the compressor is actually faulty?
Please note I am not referring to an inverter board checker with LED`s.
I am referring to a device to drive the compressor independent of the units control system.

martinw58
14-03-2015, 07:15 AM
can you not buy a normal motor inverter and wire the compressor to it and slowly start it

Airsteve
17-03-2015, 10:25 PM
can you not buy a normal motor inverter and wire the compressor to it and slowly start it

Thanks for the reply Martin
I will have a ``Google`` around and see what i can find.

martinw58
18-03-2015, 06:11 PM
let us no how you get on

PMS
07-05-2015, 07:40 AM
http://www.impromat-klima.cz/en/products/list/54-impromat-accessories/61-service-equipment/
Fujitsu(Impromat) have atleast

Airsteve
09-06-2015, 11:43 PM
http://www.impromat-klima.cz/en/products/list/54-impromat-accessories/61-service-equipment/
Fujitsu(Impromat) have atleast

Thank you for the responses.

abp32
27-06-2015, 09:33 AM
daikin and mitsi do them as well and fluke do a multimeter that will measure inverted ac current