
Read these SAFETY CONSIDERATIONS carefully
before performing any repair work. Comply with these
safety symbols without fail.
Meanings of DANGER,WARNING,CAUTION, and NOTE
DANGER ..............Indicates an imminently
hazardous situation which, if
not avoided, will result in death
WARNING ............Indicates a potentially
hazardous situation which, if
not avoided, could result in
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
property-damage accidents
1.1 Safety Considerations for Repair
•
If refrigerant gas leaks during repair or service,
ventilate the area immediately. Refrigerant gas may
produce toxic gas if it comes into contact with
flames. Refrigerant gas is heavier than air and
replaces oxygen. In the event of an accident, a
massive leak could lead to oxygen depletion,
especially in basements, and an asphyxiation
hazard could occur leading to serious injury or
•
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 may cause 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 may cause an
electrical shock or fire.
•
Disconnect power before disassembling the
equipment for repairs. Working on the equipment
that is connected to the power supply may 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.
•
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 may cause an electrical shock.
•
If refrigerant gas is discharged during repair work,
do not touch the discharged refrigerant gas. The
refrigerant gas may cause 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 can cause 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 may cause
excessive heat generation, fire, or 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 disconnected and it may cause 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
cause a fall resulting in injury.
•
Do not mix air or gas other than the specified
refrigerant R410A to the refrigerant system. If air
enters the refrigerant systems, it can cause an
excessive high pressure resulting in equipment
•
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 cause injury.
•
Securely fasten the outside unit terminal cover
(panel). If the terminal cover/panel is not fastened
properly, dust or water may enter the outside unit
causing fire or electric shock.
•
When relocating the system, keep the refrigerant
circuit free from substances other than the
specified refrigerant (R-410A) such as air. Any
presence of air or other foreign substance in the
refrigerant circuit can cause an abnormal pressure
rise or rupture, resulting in injury.
•
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 may 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
may cause an electrical shock.
•
Do not clean the air conditioner by splashing water
on it. Washing the unit with water may cause an