Omron RX - 2, Руководство пользователя

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13 Maintenance and Inspection
13 - 6 High-function General-purpose Inverter RX2 Series User’s Manual
Control
circuit
Protec-
tive
circuit
Operation
check
(1) Through unit
operation of
inverter, check
balance of out-
put voltage
between each
phase.
○
Measure line volt-
age between
inverter main circuit
terminals U, T, and
W.
Inter-phase voltage
balance
200 V class: To be
within 4 V.
400 V class: To be
within 8 V.
Digital
multime-
ter
Flowme-
ter
Voltmeter
(2) By conduct-
ing the sequence
protective opera-
tion test, check
there is no abnor-
mality in protec-
tive operation
and display cir-
cuit.
○
Simulate short or
open condition of the
protective circuit
output of inverter.
The error is
generated on the
sequence.
Cooling
system
Cooling fan
(1) No abnormal
vibration or
sound is
observed.
○
By hearing and
visual check.
(Warning indication
on the operator
keypad) To rotate smoothly.
There must be no
abnormality. Wind
brows in upper sec-
tion.
Appropriate service
years for replace-
ment: 10 years
*1 *4 *5
(2) Connections
are not loosened.
○ By visual check.
Cooling fin
There is no
clogging.
○ By visual check. There is no clogging.
Indication
Indication
(1) The LED lamp
and screen dis-
play are normal.
○ By visual check.
Check the lamp/dis-
play lights up.
(2) Cleaning. ○
Clean with a waste
cloth.
External
meter
The indicated val-
ues are normal.
○
Check indicated
values of the meters
on the boards. Satisfy the
specification values
and control values.
Voltme-
ter,
amme-
ter, etc.
Motor
General
(1) No abnormal
vibration or
sound is
observed.
○
By hearing, sensing,
and visual check. There must be no
abnormality.
(2) No abnormal
smell is
observed.
○
Check for abnormal
smell due to
overheat, damage,
etc.
There must be no
abnormality.
Insulation
resistance
Megger check
(between the
main circuit termi-
nals and earth
terminals)
*6
Disconnect U, V, and
W inverter main cir-
cuit terminals, short
the motor line (for
three phases), and
perform measure-
ment between the
motor wire and earth
terminal using a
megger.
The measured value
shall be 5 MΩ or
above. 500-VDC
class
megger
*1. The replacement period (number of years/cycles) and 13-5-5 Smoothing Capacitor Life Curve on page 13-13
are based on the designed expected life, which is not a guaranteed value.
*2. The service life of smoothing capacitor is affected by the ambient temperature. See 13-5-5 Smoothing Capac-
itor Life Curve on page 13-13 to determine replacement period.
Target
section
Item Details
Interval
Method Criteria
Mea-
sure-
ment
instru-
ment
Daily
Periodic
1
year
2
years