Astraada DRV-22, Operation Manual

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Astraada DRV-22 inverters Fault tracking
57
Checking part Checking item Checking method Criterion
instruments. the original value
*0.85.
Resistors
Ensure whether there is
replacement and splitting
caused by overheating.
Smelling and visual
examination
NA
Ensure that there is no
offline.
Visual examination
or remove one
ending to coagulate
or measure with
multimeters
The resistors are in
±10% of the
standard value.
Transformers and
reactors
Ensure there is no abnormal
vibration, noise and smelling,
Hearing, smelling
and visual
examination
NA
Electromagnetism
contactors and relays
Ensure whether there is
vibration noise in the
workrooms.
Hearing NA
Ensure the contactor is good
enough.
Visual examination NA
Control
circuit
PCB and plugs
Ensure there are no loose
screws and contactors.
Fasten up NA
Ensure there is no smelling
and color-changing.
Smelling and visual
examination
NA
Ensure there are no crackles,
damage distortion and rust.
Visual examination NA
Ensure there is no weeping
and distortion to the
capacitors.
Visual examination
or estimate the
usage time
according to the
maintenance
information
NA
Cooling
system
Cooling fan
Estimate whether there is
abnormal noise and vibration.
Hearing and Visual
examination or
rotate with hand
Stable rotation
Estimate there is no losses
screw.
Tighten up NA
Ensure there is no
color-changing caused by
overheating.
Visual examination
or estimate the
usage time
according to the
maintenance
information
NA
Ventilating duct
Ensure whether there is stuff
or foreign objection in the
cooling fan, air vent.
Visual examination NA
6.1.1 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 P07.14 (accumulative hours of the inverter).
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. Replacement fans are available from ASTOR.
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 and wait for at least the time designated on the inverter.
2. Lever the fan holder off the drive frame with a screwdriver and lift the hinged fan holder slightly upward from its front edge.
3. Disconnect the fan cable.
4. Remove the fan holder from the hinges.
5. Install the new fan holder including the fan in reverse order.
6. Restore power.