Maintenance and servicing
11.4 Replacing components
Drive converter cabinet units
Operating Instructions, 10/2008, A5E00288214A
475
11.4.21 Replacing the cabinet operator panel
1. Switch the unit into a no-voltage condition.
2. Open the cabinet.
3. Disconnect the power supply and communications line on the operator panel.
4. Release the fastenings on the operator panel.
5. Remove the operator panel.
6. Install the new operator panel.
7. Carry out any other work by reversing the sequence.
11.4.22 Replacing the Backup Battery for the Cabinet Operator Panel
Table 11- 2 Technical specifications of the backup battery
Type CR2032 3 V lithium battery
Manufacturer Maxell, Sony, Panasonic
Nominal capacity 220 mAh
Maximum permissible charging current 10 mA (restricted to <2 mA in operator panel)
Self-discharge at 20 °C 1 %/year
Service life (in backup mode) > 1 year at 70 °C; >1.5 years at 20 °C
Service life (in operation) > 2 years
Replacing
1. Switch the unit into a no-voltage condition.
2. Open the cabinet.
3. Disconnect the 24 V DC power supply and communications line on the operator panel.
4. Open the cover of the battery compartment.
5. Remove the old battery.
6. Insert the new battery.
7. Close the cover of the battery compartment.
8. Reconnect the 24 V DC power supply and communications line.
9. Close the cabinet.
NOTICE
The battery must be replaced within one minute to ensure that no AOP settings are lost.
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