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8.9.4
Faults at the external fan
The following table shows the possible causes of and remedial measures for faults on forced-
ventilated machines.
Table 8-3
Cooling system faults
↓ High temperature rise with load
Possible causes of faults
X
Wrong direction of rotation of the external fan
X
External fan is not running
X
Reduced air flow
See also
Connecting an external fan motor (Page 88)
SIMOTICS FD 1LP1
Operating Instructions 01/2019
Remedial measures
Check the electrical connections to the external fan.
Check the external fan and its connections.
Check the air ducts; clean the machine.
Operation
8.9 faults
115
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