View Full Version : I have problem with Carrier supra 522 error code
niggaz_nature
27-07-2011, 11:54 AM
Hello . On control display on Carrier Supra 522 is show ALT.EXT .
What does this code or if someone could give me a list of code errors. Thank you.
pkw111
27-07-2011, 07:24 PM
is it definitely ALT EXT? not ALT AUX?
niggaz_nature
27-07-2011, 09:48 PM
sorry
ALT AUX
moggy66
28-07-2011, 12:59 AM
Alternator not charging, is there a belt on it, are the belts turning when the engine is running?
Hi,
ALT AUX can also be a result of bad engine oil pressure switch.
-nova-
Vandman
20-08-2011, 01:57 PM
Does the unit say ALT AUX before it starts, or after it has been running?
perthtech
28-08-2011, 04:07 PM
No signal from the D+ of the alt to the micro. Could be brushes, reg or alternator itself,
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