Denso BHT-8000 User Manual page 130

Abnormal shutdown
Problem
If shut down abnormally*, the BHT has been left without dry cells or
battery cartridge loaded, or with dead dry cells or discharged battery
cartridge loaded, so unsaved data was lost.
(*"Normally shut down" refers to "turned off with the PW key or by the
auto power-off feature.")
Solution
Refer to Chapter 2, Subsection 2.3.6.
System Program malfunction
Problem
During execution of System Program, the System Program has
attempted to write onto the write-protected area of the memory.
(xxxxxxxx: Error address)
If this error occurs, the BHT beeps five times (for 0.1 second per
beep).
Solution
Unload and reload the dry cells or battery cartridge, then turn the BHT
on. If this error occurs frequently, make a note of the displayed
message and codes and contact your nearest dealer.
Problem
During execution of System Program, the System Program has
received an invalid command code.
(xxxxxxxx: Error address)
If this error occurs, the BHT beeps five times (for 0.1 second per
beep).
Solution
Unload and reload the dry cells or battery cartridge, then turn the BHT
on. If this error occurs frequently, make a note of the displayed
message and codes and contact your nearest dealer.
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