User's Manual

6. Maintenance
Page 42
Manual ION-M17EP_19P MF0150ACA.docx Manual for ION-
M
17EP
/19P
6.2. Replacing the Fan Unit
Replacement of the fan unit is not required as a preventative measure. Only if 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 and observe chapter 1.2 Health and Safety as well as the instructions in section
6.1 General before starting with the replacement.
1. Switch off the Remote Unit. Make sure mains 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 screwed
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 – 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.
5. To mount the new fan unit, re-
connect the earth-bonding
cable and the fan connector
(see step 4). Then, place the
fan unit back into its original
position and fasten it tight:
6. Screw the whole fan unit to the cabinet with the four tallow-drop screws M4x8 (see
step 2). In order not to exceed the specified torque of 3.3 N-m, use an appropriate
tool.
Fan-unit connector
Earth-bonding cable