Mitsubishi Electric PUHY-M200YNW-A1 Service Handbook page 6

After the wiring work has been completed,
measure the insulation resistance, and
make sure that it reads at least 1 MΩ.
Failure to do so may result in electric leakage, malfunc-
tion, or fire.
Relocation and Repairs
[6]
Relocation and Repairs
Only qualified personnel must relocate or
repair the unit. Do not attempt to disassem-
ble or alter the unit.
Failure to do so will result in refrigerant leakage, water
leakage, serious injury, electric shock, or fire.
Do not service the unit in the rain.
Doing so may result in electric leakage, electric shock,
wire shorting, malfunction, smoke, or fire.
[7] Additional Precautions
Additional Precautions
Do not turn off the power immediately after
stopping operation.
Wait for at least five minutes after the unit has stopped
before turning off the power. Failure to do so may re-
sult in drain water leakage or the mechanical failure of
sensitive parts.
The unit must be periodically inspected by a
dealer or qualified personnel.
If dust or dirt accumulates inside the unit, the drain
pipes may become clogged, and water leakage from
the pipes may wet the surroundings and generate
odours.
Turn on the power at least 12 hours before
starting operation. Keep the power turned
on throughout the operating season.
Insufficient energizing will result in malfunction.
Do not use the air conditioner for special
purposes (e.g. keeping food, animals,
plants, precision devices, or art objects in a
room).
Such items could be damaged or deteriorated.
Collect the refrigerant and properly dispose
of it in accordance with local regulations.
Check for refrigerant leaks before service.
If the refrigerant leaks, fire may result.
Do not open the control box cover when re-
covering, charging, or purging refrigerant.
Doing so may cause sparks, resulting in fire.
Do not install the unit on or over items that
are subject to water damage.
When the room humidity exceeds 80% or if the drain
pipe is clogged, condensation may collect and drip
from the indoor unit onto the ceiling or floor.
Drain piping must be installed by a dealer or
qualified personnel to ensure proper drain-
age.
Improper drain piping may cause water leakage, result-
ing in damage to furniture and other surroundings.
Take appropriate measures against electri-
cal noise interference when installing the
unit in hospitals or radio communication fa-
cilities.
Inverter, high-frequency medical, or wireless communi-
cation equipment as well as power generators may
cause the air conditioning system to malfunction. The
air conditioning system may also adversely affect the
operation of these types of equipment by creating elec-
trical noise.
Insulate pipes to prevent condensation.
Condensation may collect and drip from the unit onto
the ceiling or floor.
Keep the service valves closed until refrig-
erant charging is completed.
Failure to do so will damage the unit.
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