7.2
Routine maintenance
Inverters do not need any maintenance or correction in most conditions, but if
the inverter often loses power due to overheating, this can be the following
reason:
ā The cooling fins at the rear of the unit are covered by dust/dirt. Clean the
cooling fins with a soft dry cloth or brush if necessary.
Only trained and authorized professional personnel who are familiar with the
requirements of safety should perform servicing and maintenance work.
Safety checks
Safety checks should be performed at least every 12 months by a qualified person
who has adequate training, knowledge and practical experi-
ence to perform these tests. The data should be recorded in an equipment
log. If the device is not functioning properly or fails any of the tests, the
device has to be repaired. For safety check details, refer to section 2 of this
manual.
Maintain periodically
Only qualified individuals may perform the following works.
During the process of using the inverter, the responsible person shall examine and
maintain the machine regularly. The required actions are as follows.
1: Check that if the cooling fins at the rear of the inverters are not covered
with dust/dirt, and the machine should be cleaned when necessary. This work
should be conducted periodically.
2: Check that if the indicators of the inverter are in normal state, check if the
keys of the inverter are in normal state, check if the display of the inverter is
normal. These checks should be performed at least every 6 months.
3: Check to see if the input and output wires are damaged or aged. This check
should be performed at least every 6 months.
4: You should get the inverter panels cleaned and their security
checked at least every 6 months.
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