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MACH 4000
Release 11/08
2.1.12 Replacing the M4-AIR... plug-in fan unit
The plug-in fan unit (M4-AIR or M4-AIR-L) is replaceable. It may be replaced
by an electrician without turning off the device. Depending on the ambient
temperature, the device can be operated for a maximum of one to two min-
utes with the fan unit removed.
Deinstalling the M4-AIR... plug-in fan unit
Remove the two screws in the front panel of the M4-AIR or M4-AIR-L
plug-in fan unit.
Caution: After the device is switched off, the fan blades continue ro-
tating for a number of seconds. Do not reach into a rotating fan!
Pull the plug-in fan unit out a few centimeters and wait until the fan
comes to a halt before pulling it all the way out.
Installing the M4-AIR... plug-in fan unit
Deinstall the M4-AIR or M4-AIR-L plug-in fan unit to be replaced as de-
scribed above.
Slide the new plug-in fan unit all the way into the basic device along
the mounting rails above and below.
Make sure that there is a good connection between the multiple plug
of the plug-in fan unit and the female multipoint of the system bus.
Screw the two knurled screws in the front panel of the plug-in fan unit
with the frame of the basic device.
2.2
Display elements
After the operating voltage is set up, the software starts and initializes itself.
Afterwards, the device performs a self-test. During this process, various
LEDs light up. The process takes around 60 seconds.
Содержание HIRSCHMANN MACH 4000 Series
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