Checking The Compressor Function; Replacing The Fan Assembly - Bosch ACS 751 Repair Instructions

en 32 | ACS 751/651 | Compressor and fan
15. Complete the electrical connections.
16. Close the rear and left panel.
17. Check the compressor (Chap. 11.2).
12.2

Checking the compressor function

1. Connect the power cable to the mains supply.
2. Switch on the mains supply.
3. Press the C key and turn on the power switch.
4. Enter the password 33284.
5. Select "Actuators" and press E.
6. Select CX and press .
7. Observe the value of pressure for one minute.
i
If the pressure is less than 800 mbar, select PRIN
and observe the value till it increases to 2000 mbar.
Deselect PRIN and select CX.
"
If the value of the pressure reaches below
within a minute, the compressor is OK
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12.3

Replacing the fan assembly

1. Switch off the ACS 751/651.
2. Disconnect the mains connection.
3. Open the front panel.
4. Disconnect the electrical connections to the fan as-
sembly.
5. Disconnect the earthing wire connection.
6. Unfasten and remove the fan from the chassis.
Fig. 33: Fan assembly
800 mbar 7. Place the new fan in position.
8. Fasten the screws to the chassis.
9. Restore the earthing connection.
10. Restore the electrical connections to the fan as-
sembly.
11. Close the front panel.
Robert Bosch GmbH