Safety Considerations; Safety Considerations For Repair - Daikin VRV-WIII RWEYQ72PTJU Service Manual

SiUS30-1301

1. Safety Considerations

Read these SAFETY CONSIDERATIONS carefully before
performing any repair work. Comply with these safety
symbols without fail. Meanings of DANGER, WARNING,
CAUTION, and NOTE Symbols:
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 Safety Considerations
for Repair
• If refrigerant gas leaks during repair or service, venti-
late the area immediately. Refrigerant gas may produce
toxic gas if it comes into contact with flames. Refriger-
ant gas is heavier than air and replaces oxygen. In the
event of an accident, a massive leak could lead to oxy-
gen depletion, especially in basements, and an
asphyxiation hazard could occur which will result in
serious injury or death.
• Do not start or stop the air conditioner operation by
plugging or unplugging the power cable plug if a
plug is used. Plugging or unplugging the power
cable plug to operate the equipment will result in an
electrical shock or fire.
• Use parts listed in the service parts list and
appropriate tools to conduct repair work. The use of
inappropriate parts or tools could result in an
electrical shock or fire.
• Disconnect power before disassembling the
equipment for repairs. Working on the equipment
that is connected to the power supply could result in
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.
• 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 charged capacitor
could result in an electrical shock.
• If refrigerant gas is discharged during repair work,
do not touch the discharged refrigerant gas. The
refrigerant gas could result in frostbite.
• Use only pipes, flare nuts, tools, and 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 result in a serious accident or an
equipment failure.
• Check to see if the parts and wires are mounted and
connected properly, and if the connections at the
soldered or crimped terminals are secure. Improper
installation and connections could result in
excessive heat generation, fire or electrical shock.
• Securely fasten the condensing unit terminal cover
(panel). If the terminal cover/panel is not fastened
properly, dust or water may enter the condensing
unit and could result in an electrical shock or fire.
• If refrigerant gas leaks, locate the leaking point and
repair it before charging refrigerant. After charging
refrigerant, check for refrigerant leaks. If the leaking
point cannot be located and the repair work must be
stopped, perform a pump-down and close the
service valve to prevent the refrigerant gas from
leaking into the room. The refrigerant gas itself is
harmless, but it could generate toxic gases if it
comes into contact with flames.
• Do not repair the electrical components with wet
hands. Working on the equipment with wet hands
could result in an electrical shock.
• Do not clean the air conditioner by splashing water
on it. Washing the unit with water could result in an
electrical shock.
• Prior to disconnecting the suction or discharge pipe
from the compressor at the welded section,
pump-down the refrigerant gas completely in a well-
ventilated place first. If there is refrigerant gas or oil
remaining inside the compressor, the refrigerant gas
or oil can discharge when the pipe is being discon-
nected and it may result in an injury.
• Wear a safety helmet, gloves, and a safety belt when
working at an elevated height of more than 6.5 ft (2 m).
Insufficient safety measures may result in a falling
injury.
• Do not mix air or gas other than the specified
refrigerant R410A to the refrigerant system. If air
enters the refrigerant systems, it may cause
excessive high pressure and may result in
equipment damage and injury.
• When relocating the equipment, check if the new
installation site has sufficient strength to withstand
the weight of the equipment. If the installation site
does not have sufficient strength and the equipment
is not properly secured, the equipment may fall and
result in injury.
Safety Considerations
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