Honeywell
Heating & Cooling Appliance Controls
Title: Functional description S4965A3025
Doc.: S4965A3025E20
Description Sign. E.C.N. Date Rev.
First issue M.Matiasko 01-Sep-2015 A
Page 18/22
8. History information
The controller board has a possibility to register fault codes and to write some additional history information in non-volatile
memory:
1. Error codes (buffer of the 8 last errors). Every error code has it's time information (coupled with total hours);
2. Total number of burner switching (successfully finished burner sequence with flame on);
3. Total number of lockouts;
4. Number of burner "on" hours;
5. Total number of hours with power supply on.
The history information can be accessed via external communication by using the MicroCom communication protocol.
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