Chapter 9 Maintenance
9-1
Chapter 9 Maintenance
Be sure to perform daily and periodic maintenance and inspection in order to maintain the PLC
option card of iS7 inverter in best conditions.
9.1 Maintenance and Inspection
The I/O module mainly consists of semiconductor devices and its service life is semi-permanent. However,
periodic inspection is requested for ambient environment may cause damage to the devices. When
inspecting one or two times per six months, check the following items.
Check Items Judgment Corrective Actions
Temperature
0 ~ + 55°C
Humidity 5 ~ 95%RH
Adjust the operating temperature and humidity
with the defined range.
Ambient
environment
Vibration No vibration
Use vibration resisting rubber or the vibration
prevention method.
Play of modules No play allowed Securely enrage the hook.
Connecting conditions of
terminal screws
No loose allowed Retighten terminal screws.
Change rate of input
voltage
− 15% to 10%
Hold it with the allowable range.
Spare parts
Check the number of
Spare parts and their
Store conditions
Cover the shortage and improve the conditions
9.2 Daily Inspection
The following table shows the inspection and items which are to be checked daily.
Check Items Check Points Judgment
Correctiv
e Actions
check for loose mounting
screws
Screws should not be loose
Retighten
Screws
Connecting
conditions of terminal
block
Check the distance between
solderless terminals
Proper clearance should be
provided
Correct
Run LED
Check that the LED is ON
during Run
ON
(flickering or Off indicates an
error)
-
LED
ERR LED
Check that the LED is OFF
during Run
OFF(ON indicates an error) -
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