User manual of EC160 elevator intelligent integrated machine Maintenance and hardware diagnosis
199
Checking Item Method Criterion
Ensure there is no
color-changing caused by
overheating.
Visual
examination or
estimate the
usage time
according to the
maintenance
information
NA
Ventilating duct
Check whether there is
stuff or foreign objects in
the cooling fan, air inlet and
air vent.
Visual
examination
NA
10.2 Cooling fan
The inverter’s cooling fan has a minimum life span of 25,000 operating hours. The actual life span
depends on the inverter usage and ambient temperature.
The operating hours can be found through parameters.
Fan failure can be predicted by the increasing noise from the fan bearings. If the inverter is
operated in a critical part of a process, fan replacement is recommended once these symptoms
appear.
10.2.1 Replacing the cooling fan
Read and follow the instructions in chapter Safety Precautions.
Ignoring the instructions would cause physical injury or death, or
damage to the equipment.
1. Stop the inverter and disconnect it from the AC power source.
2. Lever the fan holder off the drive frame with a screwdriver and lift the fan holder.
3. Free the fan cable from the clip.
4. Disconnect the fan cable.
5. Remove the fan holder.
6. Install the new fan holder including the fan in reverse order.
7. Connect the power supply.
10.3 Capacitors
10.3.1 Reforming the capacitors
The DC bus capacitors must be reformed according to the operation instruction if the inverter has
been stored for a long time. The storing time is counted from the the delivery date.
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