Daikin RMXS-L Series Service Manual page 8

Safety Considerations
1. Safety Considerations
Read these SAFETY CONSIDERATIONS carefully before
repairing air conditioners and heat pumps. After completing
repairs, check if the unit operates properly. All electrical
repairs and work must be carried out by qualified personnel
in accordance local, state, and national regulations. Follow
all instructions that are listed under each hazard sign
(DANGER, WARNING, CAUTION, NOTE) as they are
important for ensuring safety.
DANGER .............. Indicates an imminently hazardous
situation which, if not avoided, will
result in death or serious injury.
WARNING ............ Indicates a potentially hazardous
situation which, if not avoided, could
result in death or serious injury.
CAUTION ............. Indicates a potentially hazardous
situation which, if not avoided, may
result in minor or moderate injury. It
may also be used to alert against
unsafe practices.
NOTE ................... Indicates situations that may result
in equipment or property-damage
accidents only.
1.1 During Repairs
WARNING
• Disconnect power before disassembling the
equipment for repairs. Working on the equipment
that is connected to a power supply could cause an
electric shock. If it is necessary to supply power to
the equipment to conduct repairs or to inspect the
circuits, do not touch any electrically charged
sections of the equipment.
• Prior to disconnecting the suction or discharge pipe
of the compressor at welded sections, pump-down
the refrigerant gas completely. If there is gas or oil
remaining inside the compressor, the refrigerant gas
or oil can discharge when the pump is being
disconnected and it could cause an injury.
• If refrigerant gas is discharges during repair work,
do not touch the discharged refrigerant gas. The
refrigerant gas could cause frostbites.
• If refrigerant gas leaks during repair or service,
ventilate the area immediately. Refrigerant gas could
produce toxic gas if it comes into contact with
flames.
• The step-up capacitor supplies high-voltage
electricity to the electrical components of the
outdoor unit. Discharge the capacitor completely
before conducting repair work. A charge capacitor
could cause an electrical shock.
Safety Considerations
• Do not start or stop the air conditioner or heat pump
operation by plugging or unplugging the power cord.
Plugging or unplugging he power cord to operate or
disconnect the equipment could cause an electrical
shock or fire.
• Wear a safety helmet, gloves, and a safety belt when
working at an elevated height of more than 6.5ft (2m).
Insufficient safety measures could cause a fall
resulting in a injury.
• Use only pipes, flare nuts, tools, and the other
materials designed specifically for R410A refrigerant
systems. Never use tools or materials designed for
R22 refrigerant systems on an R410A refrigerant
system. Doing so could cause a serious accident or
an equipment failure.
• If the installation platform or frame has corroded,
have it replaced. A corroded platform or frame could
cause electrical shock or fire.
• When relocating equipment, make sure that the new
installation site has sufficient strength to withstand
the weight of the equipment. If the installation site
does not have sufficient strength and if the
installation work is not conducted securely, the
equipment could fall and cause injury.
• When relocating equipment, keep the refrigerant
circuit free from all substances other than the
specified refrigerant, such as air. Any presence of
air or other foreign substance in the refrigerant
circuit could cause an abnormal pressure rise or
rupture, resulting in injury.
• Check the unit foundation for damage on a continual
basis, especially if it has been in use for a long time.
If left in a damaged condition, the unit could fall and
cause injury.
CAUTION
• Do not repair the electrical components with wet
hands. Working on the equipment with wet hands may
cause an electrical shock.
• Do not clean the air conditioner or heat pump by
splashing water on it. Washing the unit with water may
cause an electrical shock.
• Equipment must be grounded when carrying out
repairs in a humid or wet place to avoid electrical
shocks.
• Turn off the power when cleaning the equipment to
prevent internal fans (that rotate at high speed) from
starting suddenly, as they may cause injury.
• Do not tilt the unit when removing it. The condensate
water inside the unit may spill and wet furniture and
floors.
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