Safety Precautions - Mitsubishi Electric PUHZ-SW AA Series Instruction Manual

1. Safety precautions

• All electric work must be performed by a qualified
technician according to local regulations and the
instructions given in this manual. The units must be
powered by dedicated power lines and the correct
voltage and circuit breakers must be used. Power
lines with insufficient capacity or incorrect electri-
cal work may result in electric shock or fire.
• Use C1220 copper phosphorus, for copper and cop-
per alloy seamless pipes, to connect the refriger-
en
ant pipes. If the pipes are not connected correctly,
the unit will not be properly grounded and electric
shock may result.
• Use only specified cables for wiring. The wiring
connections must be made securely with no ten-
sion applied on the terminal connections. Also,
never splice the cables for wiring (unless otherwise
indicated in this document).
Failure to observe these instructions may result in
overheating or a fire.
• The terminal block cover panel of the outdoor unit
must be firmly attached. If the cover panel is mount-
ed incorrectly and dust and moisture enter the unit,
electric shock or fire may result.
• When installing or relocating, or servicing the out-
door unit, use only the specified refrigerant (R410A)
to charge the refrigerant lines. Do not mix it with any
other refrigerant and do not allow air to remain in
the lines.
If air is mixed with the refrigerant, then it can be the
cause of abnormal high pressure in the refrigerant
line, and may result in an explosion and other haz-
ards.
2
The use of any refrigerant other than that speci-
fied for the system will cause mechanical failure or
system malfunction or unit breakdown. In the worst
case, this could lead to a serious impediment to se-
curing product safety.
• Use only accessories authorized by Mitsubishi
Electric and ask a dealer or an authorized techni-
cian to install them. If accessories are incorrectly
installed, water leakage, electric shock, or fire may
result.
• Do not alter the unit. Consult a dealer for repairs. If
alterations or repairs are not performed correctly,
water leakage, electric shock, or fire may result.
• The user should never attempt to repair the unit or
transfer it to another location. If the unit is installed
incorrectly, water leakage, electric shock, or fire
may result. If the outdoor unit must be repaired or
moved, ask a dealer or an authorized technician.
• After installation has been completed, check for
refrigerant leaks. If refrigerant leaks into the room
and comes into contact with the flame of a heater
or portable cooking range, poisonous gases will be
released.
• When opening or closing the valve below freezing
temperatures, refrigerant may spurt out from the
gap between the valve stem and the valve body, re-
sulting in injuries.