Read the code in one of the formats below.
Each code is made up of two groups of flashes.
The first group indicates the 'tens' digit.
The second group indicates the 'ones' digit.
A long pause separates each code.
A shorter pause separates the 'tens' and 'ones'.
Code sequence starts with code 12 and repeats each code 3 times. (if only code 12 is found, system is normal)
Upper Code Format Diagram shows code No. 32.
Or...
Each code is made up of four groups of flashes.
Each group represents 'thousands' 'hundreds', 'tens' and 'ones' respectively.
A long pause separates each code.
A shorter pause separates the each group.
A zero digit is represented by 10 flashes.
Bottom Code Format Diagram shows code No. 1232.