Denso BHT-100Q - Manual (Page 147)

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Chapter 4. Error Messages
System Program malfunction
■ Problem
During execution of System Program, the System
Program has attempted to write onto the write-pro-
tected 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 battery cartridge, then turn
on the power.
Abnormally turned off last
■ Problem
After turned off abnormally*, the BHT had been
left with no battery cartridge loaded or with a dis-
charged battery cartridge loaded, so unsaved data
was lost.
(*"Normally turned off" refers to turned-off with
the PW key or by the auto power-off feature.)
■ Solution
Refer to Subsection 2.3.6 "BHT Turning-off Notes."
■ 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 battery cartridge, then turn
on the power.