Mitsubishi Electric R410A Service Handbook page 6

To reduce the risk of current leakage, over-
heating, smoke, or fire, use properly rated
cables with adequate current carrying ca-
pacity.
To reduce the risk of current leakage, wire
breakage, smoke, or fire, keep the wiring
out of contact with the refrigerant pipes and
other parts, especially sharp edges.
[6] Relocation and Repairs
Relocation and Repairs
To reduce the risk of refrigerant leakage,
water leakage, injury, electric shock, and
fire, units should only be moved or repaired
by your dealer or qualified personnel.
Do not touch a board with a hand or tool or
allow dust to adhere to it. There is a risk of
a short-circuit, electric shock, failure, and
fire.
[7] Additional Precautions
Additional Precautions
To avoid damage to the unit, use appropri-
ate tools to install, inspect, or repair the
unit.
Turn on the power at least 12 hours before
starting operation. Do not turn off the power
during a unit operation period. There is a
risk of a failure.
Recover all refrigerant in the units, and dis-
pose of it properly according to any applica-
ble laws and regulations.
Provide a maintenance access to allow for
the inspection of pipes above the ceiling or
the buried pipes.
Grounding (earth) work must be performed
by a qualified electrician. Do not connect
the ground wire to a gas pipe, water pipe,
lightning rod, or telephone ground wire.
There is a risk of electric shock, incorrect
operation due to noise, smoke generation,
ignition, fire, and explosion.
To reduce the risk of wire shorting, electric
leak, electric shock, smoke, or fire, do not
perform maintenance work in the rain.
To reduce the risk of injury, electric shock,
and fire, properly reinstall all removed com-
ponents after completing repair work.
To reduce the risk of refrigerant and water
leakage, check the pipe supports and insu-
lation for damage during inspection or re-
pair, and replace or repair the ones that are
found to be deteriorated.
When installing the unit in a location with an
electrical noise source, take measures
against noise. There is a risk of the unit fail-
ing or operating incorrectly due to the influ-
ence of equipment such as an inverter
device, home power generator, high fre-
quency medical equipment, or radio com-
munication equipment.
When installing the unit in a location where
electrical noise generated by the unit will be
a problem, take measures against noise.
There is a risk of interference with medical
treatment. There is a risk of video broad-
casts being distorted or affected by noise.
To reduce the risk of damage to the unit,
leave the valves on the unit closed until re-
frigerant charging is completed.
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