benshaw.com
108
9
9.2 PERIODIC INSPECTION
9.1.1 Routine Inspection Items
9.2.1 Periodic Inspection Items
DANGER
• Do not perform inspection while the power is on.
• Before the inspection, disconnect all power supplies and wait for 10
minutes to avoid risk caused by residual voltage in the capacitor of
the drive
Influence of ambient temperature, humidity,
dust and vibration will cause aging of
components in the AC drive, which may
cause potential faults or reduce the product
life. Therefore, it is necessary to perform
routine and periodic maintenance. More
frequent inspection will be required if it is
used in harsh environments, such as: high
ambient temperature; frequent starting and
Always keep the AC drive clean. Clear away dusts, especially metal powder on the
surface of the AC drive, to prevent dust from entering the drive. Clear oil and dirt
from the cooling fan of the AC drive.
stopping; fluctuations in the ac power supply
or load; excessive vibrations or shock loading;
dust, metal dust, salt, sulfuric acid, chlorine
atmospheres; poor storage conditions.
Check the following items routinely to avoid
deterioration in performance or product. Copy
this checklist and sign the “Checked” column
after each inspection.
Inspection Item
Inspection Points
Solutions
Checked
Motor
Inspect whether abnormal
oscillation or noise exists.
Check mechanical connections.
Check power phases of the motor.
Tighten all loose screws.
Fan
Inspect whether the cooling
fan of the AC drive and the
motor works abnormally.
Check running of the drive-side cooling fan.
Check running of the motor-side cooling fan.
Check whether the cooling fan is clogged or dirty.
Check whether ambient temperature is within the
permissible range.
Installation
environment
Inspect whether the cabinet
and cable duct are abnormal.
Check for input and output cables with insulation
damage.
Check for vibration of hanging bracket.
Check whether copper ground bars and terminals
have become loose or corroded.
Load
Inspect whether the drive
output current exceeds the
drive or motor rating for an
extended period of time.
Check for setting of motor parameters.
Check for excessive load.
Check for mechanical vibration
(< 0.6 g on normal condition).
Input voltage
Check main power supply
and control voltage.
Adjust the input voltage to the permissible range.
Check whether start of heavy load exists.
9. ROUTINE INSPECTION AND MAINTENANCE
