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BillyHvac, Journeyman HVAC Tech
Category: HVAC
Satisfied Customers: 22512
Experience:  Endorsed for unlimited heating, cooling, oil burners, boilers, refrigeration, hydronics
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How to fix alarm code 1a on carel ir33 /

Customer Question

how to fix alarm code 1a on carel ir33
Submitted: 1 year ago.
Category: HVAC
Expert:  BillyHvac replied 1 year ago.
the control is coding a high temp is the refrigeration unit itself that has failed...the Carel only knows it is not at will need troubleshoot the refrigeration system
Customer: replied 1 year ago.
1a alarm has nothing to do with high temperature. Even after I raised set point 10 degree higher than temperature in the refrigerator and reset the control alarm 1a still was on.Felix
Expert:  BillyHvac replied 1 year ago.
Then your code is not 1A....
It is IA (ia)...which is a digital input. (input alarm)
Please confirm which code you have.
Customer: replied 1 year ago.
It is IA.
Expert:  BillyHvac replied 1 year ago.
Thank you.
what input do you have to a4 and a5?
Customer: replied 1 year ago.
unfortunately I'm not at the site and i don't remember settings for a4 & a5., but what there are suppose to be?
thank you, felix
Expert:  BillyHvac replied 1 year ago.
see page 9 at the link below.
Customer: replied 1 year ago.
Thank you Billy.
Expert:  BillyHvac replied 1 year ago.
I hope all goes well

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