ACRC502 - Humidifier Commmunication Fault

[serge_onore]

Hi community!

I have couple ACRC502 units that started exhibiting same problem as in this thread (I cannot post there for some reason):
https://community.se.com/t5/APC-UPS-Data-Center-Enterprise/ACRC502-Humidifier-Commmunication-Fault/t...
In fact, they behave like they are ACRP units (with humidifier and heater) but they are not! So they with through random errors like:

Warning	Humidifier Communication Fault
Warning	Heater 3 Fault
Warning	Return Humidity Sensor Fault

Our setup consist of 8 units: 4x ACRP502 and 4x ACRC502, combined in one group. Only ACRC502 will exhibit this problem
All 8 units have same firmware:

* Application Module: acrp v3.9.1
* APC OS (AOS): aos v3.9.2

I could not find specific firmware for ACRC502. It looks like it uses same files as ACRP502. So the question is: how to tell my ACRC units that they don't have humidifier and heaters and stop throwing errors?