legg wrote:
On Mon, 05 Jan 2009 09:28:54 +1100, Sylvia Else
wrote:

Phil Allison wrote:
"No legg to stand on "

This assembly was designed to fail in a safe manner - no fire,
explosion or shock hazard was intended to result from a single fault
resulting in the fusing of the emitter resistor. However, this does
not mean that the repaired unit will meet the same standards. The
events that occurred may have affected the safety isolation of
magnetic isolators in such a way that a second similar event may not
be as benign.


** Jesus Christ -

get ****ing real you asinine ****ing WOG ****** !!

The WHOLE damn AC unit is metal encased, installed & MAINS earthed
!!!!
Leaving aside the abuse, I confess this was my sentiment as well. And
not only that, neither the outside nor inside units even get touched in
the normal way of things.

The entire board could go up in flames, if it were inflammable, and
still cause nothing more than a bad smell. Since it's outside even the
resulting fumes wouldn't be a threat.

Sylvia.

I see that specific poster's dialog in your response, only. His actual
postings get filtered autiomatically here.

The unit is unlikely to go up in flames, for good reasons.

As a technician, you'd be advised to follow industry standards in
repair of any line-isolating assembly. One doesn't always know the
n'th reason why something was done.

A hipot is not impossible to arrange, locally, if you don't have the
equipment yourself.

RL

My test repair with a non-fuisible resistor and an NPN transistor from
my stock seems to have worked (rather to my surprise), so I'll have to
source a fusible resistor now.

I'll take your comment about a hi-pot on board, though in fact I've only
worked on the high voltage side of the system - the transformer hasn't
been touched. Still, I suppose insulation breakdown in the transformer
could be implicated in the original failure.

Sylvia.