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Datex-Ohmeda ADU
Replacement of the EEPROM memory and the A-FGC1 software
In case of a CPU board (see 3 below) failure; transfer the EEPROM memory D7 (4) or software (5) from
the old CPU board to new CPU board. There is no need for recalibration. If however, a new EEPROM is
installed, all calibrations of the unit must be performed.
The EEPROM memory contains the module serial numbers and calibration data.
When ordering an EEPROM circuit as a spare part, the serial number of the unit where it should be
installed in must be stated.
If the software or the EEPROM is replaced, carry out a Functional check.
To replace the EEPROM (4) or software (5) proceed as follows:
1.
Mains or gas supplies must not be connected to the unit.
2.
Remove the rear plastic cover of the ADU and metal cover over the A-FGC1.
3.
Replace the EEPROM or software and refit the covers.
4.
Reconnect pipeline gas and mains supplies.
NOTE: After installation of a new EEPROM the A-FGC1 must be calibrated.
Figure 35
B-38
8
7
6
Exploded view of the A-FGC1 electronics
4
3
2
5
1
Document No. 8502854
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Troubleshooting
