Older panels (GV3 8.05 and older) that use the D5200, if no Data Lock Code is set you can copy the panel and view the RAM/RPS Pass Code.
If a Data Lock and or RPS Pass Code is set in the panel your options are:
Call the installing company and ask them to unlock the panel.
Call Bosch Repair 800-289-0096 and get an RMA to have the panel factory defaulted.
Part numbers D7212B, D9112B, D7212B1, D9112B1, D7212, D7412, D9112, D9124, D9412, D7412G, D9124G, D9412G, D7412GV2, D9124GV2, D9412GV2, D7412GV3, D9412GV3, D7412GV4, D9412GV4, D8112, D8112E, D8112E1, D8112G, D8112G1, D8112G2,