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03-12-2008, 03:41 AM #1
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I need help with a Carrier Roof/Top unit...Please
Hi All… I am Dave
Really could use your help... I am a certified A/C and Heating Technican... I graduated from RSI, (Refrigeration School Institute),Institute in Phoenix.. I am asking for a second opinion of which the first is my opinion... But I need your help if at all possible...
I have a Carrier roof top, A/C and Heating unit that has a Mother Board or called a control Board... This board has an Error code detection light when something is wrong... It flashes 1 thru 8 error codes.... Now the particular errors are as follows... It listed 3 errors...
The inducer fan will not shot off to complete the shut down cycle after it reaches the Thermostat setting…. As the fan just keeps running until I turn off the main power and these are the error codes that are displayed on the Board before I shut off the main power…
1 flash.... Fan on/off delay modified
6 flashes.. Inducer switch fault
8 flashes.. Internal control fault
I have never had a unit show so many errors codes... But my opinion is that the Mother Board,(Control Board),is at fault and I need another Mother Board, (Control Board). Because the Fan Delay is internal to the board and also the Internal Control Fault is also part of the Board, and I also believe that the Inducer Control switch is also part of the board.... Can you confirm that I need a new board??? I do not want to replace the board with out a your advice first....
Carrier Roof Top... A/C n Heating unit
Model #..... 48SS-042080321
Serial #.... 4695G80613
Thank You,
David Morton...
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03-12-2008, 04:01 AM #2
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Code 8, internal control fault = defective board. Usually.
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03-12-2008, 06:24 AM #3
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Provided you checked to make sure no one has put a power stealing stat on that unit. And that voltage is proper.
Code 8 usually means the board is bad.
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03-12-2008, 06:52 PM #4
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Thank you very much for your information..... Never had a unit show this many faults at once.... So I was second guessing my self.... Again thank you.... and I will let you know how it goes when I get back to that unit..... This is what I was thinking that the board was bad.... But needed a second opinion....
David Morton
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03-12-2008, 06:55 PM #5
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Thank you very much for your information..... Never had a unit show this many faults at once.... So I was second guessing my self.... Again thank you.... and I will let you know how it goes when I get back to that unit..... This is what I was thinking that the board was bad.... But needed a second opinion....
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03-13-2008, 08:46 PM #6
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Before you go to a new board, take off ALL t-stat wires & just jump out R&W & see if there are errors on a call for heat..
If not, then you can focus on the t-stat.
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03-13-2008, 08:52 PM #7
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Chek your high voltage
I had a loose connection that was melting the wires inside of the disconect
the unit ran but the board gave me a mess of codes as wellI remember my first day,It was fun!
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