User's Manual

6. Maintenance
7.Manual MF0200A0A ION-U_H_17P2_uc_19-July-13.docx User’s
Manual for ION
®
U
Page 45
6.2. Replacing the Fan Unit
Replacement of the fan unit is not required as a preventative measure. Only when an
alarm indicates a malfunctioning of a fan, must the unit be exchanged.
 Note: Please observe that the fan unit can only be replaced as a whole.
Do not remove the fans separately.
Read the health and safety warnings in chapter 1.2 Health and Safety Warnings as
well as the instructions in chapter 6.1 General before starting with the replacement.
1. Switch off the remote unit. Make sure that mains power is disconnected for
the following replacement procedure. Then, proceed as follows:
2. Loosen the four tallow-drop screws
M4x8 by which the fan plate is
attached to the cabinet. Remove the
four screws and the corresponding
washers.
3. Remove the fan unit – by putting slight
pressure on the fan plate cover –
moving it to a position that allows
access to the fan connector and the
earth-bonding cable.
4. Unscrew the fan connector and then
disconnect the earth-bonding cable.
 Note: To observe the specified torque of 650 Ncm for an M5 thread, use
an appropriate tool for the following procedures.
Fan-unit connector
Earth-bonding cable