Cooling Fan - INVT Goodrive35 Series Operation Manual

Goodrive35 Series Closed-loop Vector Control VFD
Checking

Cooling fan

Cooling
system
Ventilating
duct
For more information about the maintenance, contact the local INVT office, or visit the website
http://www.invt.com.cn of Shenzhen INVT Electric CO., Ltd., choosing Service and Support on the
homepage to obtain the online service you need.
9.3 Cooling fan
The VFD's cooling fan has a minimum life span of 25,000 operating hours. The actual life span
depends on the VFD usage and ambient temperature.
The operating hours can be found through P07.14.
Fan failure can be predicted by the increasing noise from the fan bearings. If the VFD is operated in a
critical part of a process, fan replacement is recommended once these symptoms appear. Spare fans
are also available.
9.3.1 Replacing the cooling fan
 Read and follow the instructions in Chapter 1 "Safety precautions". Ignoring the
instructions would cause physical injury or death, or damage to the equipment.
1. Stop the VFD and disconnect it from the AC power source and wait for at least the time designated
on the VFD.
2. Loose the fan cable from the clip (remove the shell for the VFDs of 380 V 1.5–30 kW).
3. Disconnect the fan cable.
Item
Ensure there are no crackles,
damage distortion and rust.
Ensure there is no weeping
and distortion
capacitors.
Estimate whether there is
abnormal noise and vibration.
Estimate there is no losses
screw.
Ensure there
color-changing caused
overheating.
Ensure whether there is stuff
or foreign objection in the
cooling fan, air vent.
Method
Visual examination
Visual examination or
estimate the usage
to the time according to the
maintenance
information
Hearing
examination or rotate
with hand
Tighten up
Visual examination or
is no estimate the usage
by time according to the
maintenance
information
Visual examination
213
Routine maintenance
Criterion
NA
NA
and Visual
Stable rotation
NA
NA
NA