CDR23 Control Module Function

General information on the fault memory

Fault code setting conditions
Fault codes can be set in several circumstances, e.g.:
- Battery disconnected.
- Plug connections disconnected.
- Power failure.

In these situations, no fault is present in the system and the fault memory must be erased.

Fault memory Info key [F8]
In order to be able to assess the fault exactly, the fault memory Info key [F8] must be pressed. This information should be saved using the Save key [F4] and printed out. If a fault code is stored with "not present" status and no other problems are present, then the fault memory must be erased.

Fault type - Frequency counter/Temperature/Voltage; Speed

Fault status The display shows whether the fault is:

- 'Not present'
- 'Present'

in the system.

Frequency counter When a fault first occurs, a fault entry with the status 'present' is set in the fault memory and the counter is simultaneously set to '50'. The counter is incremented by one in the event of an error each time the system is 'booted'. The maximum count is 255.

The counter is decremented if the status 'fault no longer present' is entered and the fault does not occur again when the system is 'booted'. The entry in the fault memory is erased automatically when the counter reaches 0. If the error occurs again when the counter is between 1 and 49, the counter is reset to 50.

Temperature The value indicates the temperature (temperature sensor in the gateway) at the time the fault occurred. The temperature of the fibre optic transmitter is monitored: max 85 °C.

Voltage The value indicates the voltage at the time the fault occurred.

Vehicle speed The value indicates the vehicle speed at the time the fault occurred.