BENSHAW RSi GM2 Series - Page 261

251
Maintenance
890054-00-00
GM2 Series VFD
Caution
Periodic Inspection Items (con’t)
Inspection
Item
Inspection
Period
Inspection
Method
Criterion
Customer
Use
Monthly
1 Year
2 Year
Check/Initial
/Date
Powered VFD
- Running Checks/Measurements
Output
Voltages
Is there any voltage
imbalance between
phases of the output?
X
Measure the
voltage
between the
output
terminals U,
V and W.
Tol. +/-2%
230V (5V)
460V (10V).
Does the displayed
Output Voltage agree
with measurement?
X
Display
parameter for
Output
Voltage,
compare to
measured
value.
Tol. -10%
+ 20%
Note 2
Output
Curent
Is there any current
imbalance between
phases of the output?
X
Measure the
current out of
each phase
U, V, W.
Tol. +/-3%
Note 2
Does the displayed
Output Current agree
with measurement?
X
Display
parameter for
Output
Current,
compare to
measured
value.
Tol. +/-5%
Note 2
Motor
Are there any
abnormal vibrations
or noise?
X
Auditory,
sensory,
visual check.
Mounting
and
Coupling
Is there any unusual
odor?
X
Check for
overheat and
damage.
Note 1
Do not run an insulation resistance test (Megger) on the VFD or with VFD connected to supply and motor, damage
will occur.
Note 2
Multimeter measurements of VFD output could vary depending on the type of meter.
ESD (Electrostatic discharge) To prevent damage to the PCB from ESD, touch a
metal object with your hands to discharge any electricity before working on the PCB,
or wear an anti-static wrist strap and ground it on a metal object.