Periodic Maintenance Of Parts; Procedure For Adjusting Constants After Replacement Of Control Board - YASKAWA varispeed G7 CIMR-G7B series Instruction Manual

Periodic Maintenance of Parts

The Inverter is configured of many parts, and these parts must be operating properly in order to make full use
of the Inverter functions.
Among the electronic components, there are some that require maintenance depending on their usage condi-
tions. In order to keep the Inverter operating normally over a long period of time, it is necessary to perform
period inspections and replace parts according to their service life.
Periodic inspection standards vary depending the Inverter's installation environment and usage conditions.
The Inverter's maintenance periods are noted below. Keep them as reference.
Refer to Cooling Fan Replacement Outline (Page 8-6) for replacing a cooling fan and Circulation Fan
Replacement Outline (Page 8-16) for replacing a circulation fan.
To replace other parts, contact your Yaskawa representative or YASKAWA ELECTRIC ENGINEERING
CORPORATION for details on preventive maintenance for Inverters.
Part
Cooling fan
Smoothing capacitor
Breaker relays
Fuses
Aluminum capacitors on PCBs
Note The standard replacement period is based on the following usage conditions:
Ambient temperature:Yearly average of 30°C
Load factor: 80% max.
Operating rate: 12 hours max. per day

Procedure for Adjusting Constants after Replacement of Control Board

Perform the following operations before adjusting the constants.
For 400-V class Inverters of 55 kW to 300 kW, take safety measures such as the installation of an emer-
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gency-stop switch. Failure to do so may result in injury caused by the motor accidentally rotating during
stationary autotuning performed by the Inverter when the constants are adjusted.
Before replacing the control board, first use the COPY function of the Digital Operator to copy the settings
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of the constants of board from the Inverter to the Digital Operator.
When using the copy function of the Digital Operator, check that the following settings are the same between
the Inverter and the Digital Operator. Note the setting of A1-02 (Control method selection).
Inverter product and type
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Software number
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Inverter capacity and voltage
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Control method
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Refer to Copying Constants in Chapter 6.
After replacing the board, use the following procedure to adjust the constants.
Steps 4 and 5 are not required for 400-V class Inverters of 0.4 kW to 45 kW, and all models of 200-V class
Inverters regardless of capacity. If using a 400-V class Inverter of 55 kW to 300 kW then perform steps 4 and
5.
Contact your Yaskawa representative if a motor cannot be connected, the motor being used is two frames
smaller than the Inverter.
Table 8.2 Part Replacement Guidelines
Standard Replacement Period
2 to 3 years
5 years
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10 years
5 years
Maintenance and Inspection
Replacement Method
Replace with new part.
Replace with new part. (Determine need by
inspection.)
Determine need by inspection.
Replace with new part.
Replace with new board. (Determine need by
inspection.)
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