Faults At The External Fan - Siemens SIMOTICS 1PQ8 Operating Instructions Manual
Low-voltage motor
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8.11.4
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 86)
SIMOTICS TN Series N-compact 1PQ8
Operating Instructions 11/2018
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
8.11 faults
107
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