Mitsubishi Electric AT-50B Installation Manual page 2

Precautions during wiring
WARNING
To reduce the risk of damage to the controller, malfunctions, smoke, or fire, do
not connect the power cable to the signal terminal block.
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 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.
CAUTION
To reduce the risk of electric shock, shorting, or malfunctions, keep wire pieces
and sheath shavings out of the terminal block.
To reduce the risk of shorting, current leakage, electric shock, or malfunctions,
keep the cables out of contact with controller edges.
Precautions for moving or repairing the controller
WARNING
The controller should be repaired or moved only by qualified personnel. Do not
disassemble or modify the controller.
Improper installation or repair may cause injury, electric shock, or fire.
Additional precautions
To avoid damage to the controller, use appropriate tools to install, inspect, or repair
the controller.
AT-50B is designed for exclusive use with the Building Management System by
Mitsubishi Electric. The use of this controller for with other systems or for other
purposes may cause malfunctions.
Take appropriate measures against electrical noise interference when installing the
air conditioners in hospitals or facilities with radio communication capabilities.
Inverter, high-frequency medical, or wireless communication equipment as well as
power generators may cause the air conditioning system to malfunction. Air
conditioning system may also adversely affect the operation of these types of
equipment by creating electrical noise.
To avoid malfunctions, do not bundle power cables and signal cables together, or
place them in the same metallic conduit.
This appliance is not intended for use by persons (including children) with reduced
physical, sensory or mental capabilities, or lack of experience and knowledge, unless
they have been given supervision or instruction concerning use of the appliance by a
person responsible for their safety.
Children should be supervised to ensure that they do not play with the appliance.
1-2. The CD-ROM that is supplied with AT-50B
The CD-ROM that is supplied with AT-50B can only be played on a CD-drive or a DVD-drive.
WARNING
Do not attempt to play this CD-ROM on an audio CD player as this may damage your ears and/or speakers.
The CD-ROM that is supplied with AT-50B has Installation Manual and Instruction Book in English, German, French, Spanish, Italian,
Portuguese, Russian, Swedish, simplified Chinese, and traditional Chinese.
Each document is in PDF format.
Viewing documents requires a computer with Adobe Reader or Adobe Acrobat installed.
"Adobe Reader" and "Adobe Acrobat" are registered trademarks of Adobe Systems Incorporated.
To reduce the risk of electric shock, install a breaker and a residual current
circuit breaker on the power supply. To reduce the risk of electric shock, smoke,
or fire, install a breaker for each controller.
Use properly rated breakers and fuses (breaker, local switch <switch + fuse>,
no-fuse breaker). The use of a breaker with a breaking capacity greater than the
specified capacity may cause electric shock, malfunctions, smoke, or fire.
To reduce the risk of current leakage, overheating, smoke, or fire, use properly
rated cables with adequate current carrying capacity.
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, malfunctions, or fire, seal the gap between
the cables and cable access holes with putty.
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.
To avoid damage to the controller, do not overtighten the screws.
To avoid discoloration, do not use benzene, thinner, or chemical rag to clean the
controller. To clean the controller, wipe with a soft cloth soaked in mild detergent that
is diluted with an appropriate amount of water, and wipe down with a wet cloth
followed by a dry cloth. Do not use the detergent straight.
To avoid damage to the controller, provide protection against static electricity.
Do not use solderless terminals to connect cables to the terminal block.
Solderless terminals may come in contact with the circuit board and cause
malfunctions or damage the controller cover.
To avoid damage to the controller, do not make holes on the controller cover.
To avoid deformation and malfunction, do not install the remote controller in direct
sunlight or where the ambient temperature may exceed 40ºC (104ºF) or drop below
0ºC (32ºF).
This appliance is intended to be used by expert or trained users in shops, in light
industry and on farms, or for commercial use by lay persons.
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.
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