Service Call Tables
SM 7-27 D093/D094
Trouble-
Shooting
7.3.6 SC600
632 B Key/card counter device error 1
CTL
After 1 data frame is sent to the device, an ACK signal is not received within
100 ms, and is not received after 3 retries.
Serial line from the device to the main machine is unstable,
disconnected, or defective
633 B Key/card counter device error 2
CTL
During communication with the device, the MCU received a break (Low)
signal.
Serial line from the device to the main machine is unstable,
disconnected, or defective
634 B Key/card counter device error 3
CTL
The backup battery of the counter device RAM is low.
RAM backup battery exhausted
Counter device defective
635 B Key/card counter device error 4
CTL
After installation of the device a message alerts user to a battery voltage
abnormal error.
Device control board defective
Device control board backup battery defective
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