Ricoh D017 Service Manual page 394

Key/card counter device error 1
After 1 data frame is sent to the
632 B
device, an ACK signal is not
received within 100 ms, and is not
received after 3 retries.
Key/card counter device error 2
During communication with the
633 B
device, the MCU received a break
(Low) signal.
Key/card counter device error 3
634 B
The backup battery of the counter
device RAM is low.
Key/card counter device error 4
After installation of the device a
635 B
message alerts user to a battery
voltage abnormal error.
SM Appendix
Serial line from the device to
the main machine is unstable,
disconnected, or defective
Serial line from the device to
the main machine is unstable,
disconnected, or defective
RAM backup battery
exhausted
Counter device defective
Device control board defective
Device control board backup
battery defective
3-19 D017/D018/D019/D020/D084/D085
Service Call Conditions