Panasonic FP-7818 Service Manual & Parts Manual page 107

Code Item
39 System console lower
paper drawer count
40 LCC count
(3000 sheet paper drawer)
41 Copier upper paper drawer
count
(When duplex unit is not
installed.)
42 - 50 Not used
5-30
Function
Total count of upper stage of optional system console.
Total count of optional LCC
Total count of copies from upper paper drawer of the copier.
NOTE: When the duplex unit is installed to/upper stage of
copier, this code No. 05 does not count up.