499231
16
| IV-50 EC
11.3 Maintenance
Warranty claims can only be made if maintenance work is carried out correctly and written evidence thereof is provided.
We recommend regular maintenance intervals to ensure continuous fan operation. These maintenance intervals are specified in the
“Activities” table below. In addition, the operator must carry out follow-up activities such as cleaning, replacing defective components
or other corrective measures. For traceability reasons, a maintenance plan must be created which documents the work carried out.
This must be created by the operator. If the operating conditions are "extreme", the maintenance intervals must be reduced so that
maintenance is carried out more frequently. Examples of extreme operating conditions:
• Fan unit in rare use (less than once a month)
• Fan used for emergency operation
• Ambient temperature > 45 ºC (113 °F) or < -20 ºC (-4 °F)
The following checklist provides points of reference for the tasks to be carried out:
Table 6 Activities
Activity
Normal Operating Conditions
Extreme Operating Conditions
Every 6 mos
Annually
Quarterly
Every 6 mos
Check the fan and its components for visible damage,
corrosion, and contamination.
X
X
Check the impeller for damage and imbalance.
X
X
Clean the fan/ventilation system
X
X
Check the screwed connections for damages/defects and
check that they are firmly seated.
X
See normal operating conditions
Check the fan intake is free from contamination.
X
X
Check that the fan and its components are being used
correctly.
X
See normal operating conditions
Check the current consumption and compare this with the
rated data.
X
X
Check the vibration dampers (if used) are working correctly
and check for visible damage and corrosion.
X
See normal operating conditions
Check the electrical and mechanical protective equipment is
working correctly.
X
See normal operating conditions
Check the fan’s rating plate is legible.
X
Check the connection clamps and screwed cable connections
for damage/defects, and check that they are firmly seated.
X
See normal operating conditions
Check the flexible connectors for damage.
X
See normal operating conditions
