itstony
16-08-2012, 07:37 AM
Guys,
Just wondering if anyone has a view on a fault I found.
Checked the R-B-W cables for resistance when disconnected on the compressor and had a posative reading.
Reconnected and ran the outdoor unit while monitoring the three and found all were reading output voltage while the fan was running.
After a short time it was identified that the W would drop its voltage and phase.
On seeking advice it was deemed to be a board fault and due to cost or a new board would not be economical.
Two units were replaced.
What I would like to know if anyone had a theory on what would cause this.
It did appear that when the fan or unit was calling for a step up. Trying to find what else might be causing this came up against a blank?
Just wondering if anyone has a view on a fault I found.
Checked the R-B-W cables for resistance when disconnected on the compressor and had a posative reading.
Reconnected and ran the outdoor unit while monitoring the three and found all were reading output voltage while the fan was running.
After a short time it was identified that the W would drop its voltage and phase.
On seeking advice it was deemed to be a board fault and due to cost or a new board would not be economical.
Two units were replaced.
What I would like to know if anyone had a theory on what would cause this.
It did appear that when the fan or unit was calling for a step up. Trying to find what else might be causing this came up against a blank?