Mitsubishi Electric CAHV-R450YA-HPB Installation & Operation Manual page 5

Electrical wiring
WARNING
To reduce the risk of wire breakage, overheating, smoke, and
fire, keep undue force from being applied to the wires.
Properly secure the cables in place and provide
adequate slack in the cables so as not to stress the
terminals.
Improperly connected cables may break, overheat, and
cause smoke or fire.
To reduce the risk of injury or electric shock, switch off the
main power before performing electrical work.
All electric work must be performed by a qualified
personnel according to the local regulations, standards,
and the instructions detailed in the Installation Manual.
Capacity shortage to the power supply circuit or improper
installation may result in malfunction, electric shock, smoke,
or fire.
To reduce the risk of electric shock, smoke, or fire, install an
earth leakage breaker on the power supply to each unit.
Use properly rated breakers and fuses (an earth leakage
breaker, local switch <a switch + fuse that meets local
electrical codes>, or overcurrent breaker).
The use of improperly rated breakers may result in electric
shock, malfunction, smoke, or fire.
CAUTION
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.
Transportation and repairs
WARNING
The unit should be moved, disassembled, or repaired
only by qualified personnel. Do not alter or modify the
unit.
Improper repair or unauthorized modifications may result in
refrigerant leakage, water leakage, injury, electric shock, or
fire.
CAUTION
To reduce the risk of shorting, electric shock, fire, or
malfunction, do not touch the circuit board with tools or with
your hands, and do not allow dust to accumulate on the
circuit board.
IMPORTANT
To avoid damage to the unit, use appropriate tools to install,
inspect, or repair the unit.
To reduce the risk or malfunction, turn on the power at least
12 hours before starting operation, and leave the power
turned on throughout the operating season.
To reduce the risk of current leakage, overheating, smoke, or
fire, use properly rated cables with adequate current carrying
capacity.
Keep the unsheathed part of cables inside the terminal
block.
If unsheathed part of the cables come in contact with each
other, electric shock, smoke, or fire may result.
Proper grounding must be provided by a qualified
personnel. Do not connect the grounding wire to a gas
pipe, water pipe, lightning rod, or telephone wire.
Improper grounding may result in electric shock, smoke, fire,
or malfunction due to electrical noise interference.
Tighten all terminal screws to the specified torque.
Loose screws and contact failure may result in smoke or fire.
Only use standard power cables of sufficient capacity.
Failure to do so may result in current leakage, overheating,
smoke, or fire.
To reduce the risk of electric shock, shorting, or malfunctions,
keep wire pieces and sheath shavings out of the terminal
block.
After disassembling the unit or making repairs, replace
all components as they were.
Failing to replace all components may result in injury, electric
shock, or fire.
If the supply cord is damaged, it must be replaced by the
manufacturer, its service agent or similarly qualified persons
in order to avoid a hazard.
Do not open the control box cover while charging
refrigerant.
• If the refrigerant leaks, a fire may result.
Recover all refrigerant from the unit.
It is punishable by law to release refrigerant into the
atmosphere.
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