Mitsubishi Electric e Series Service Handbook page 5

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
electrician 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
inverter circuit breaker on the power supply to each unit.
Use properly rated breakers and fuses (inverter breaker,
Local Switch <Switch + Type-B fuse>, or no-fuse
breaker).
The use of improperly rated breakers may result in
malfunctions 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.
Recover all refrigerant from the unit.
It is punishable by law to release refrigerant into the
atmosphere.
Do not unnecessarily change the switch settings or
touch other parts in the refrigerant circuit.
Doing so may change the operation mode or damage the
unit.
To reduce the risk of malfunctions, use the unit within its
operating range.
Do not switch on or off the main power in a cycle of
shorter than 10 minutes.
Short-cycling the compressor may damage the compressor.
HWE1417B
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 licensed
electrician. 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.
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.
To maintain optimum performance and reduce the risk of
malfunction, keep the air pathway clear.
To reduce the risk of both the breaker on the product side and
the upstream breaker from tripping and causing problems,
split the power supply system or provide protection
coordination between the earth leakage breaker and no-fuse
breaker.
When servicing the refrigerant, open and close the check
joint using two spanners, as there is the risk of
refrigerant leaking due to damaged piping.
iv
GB