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1. Safety precautions
Read the following precautions thoroughly before the maintenance, and then inspect and repair the product in a
safe manner.
The types and levels of danger that may arise if the product is handled incorrectly are described with the warning
symbols shown below.
Electric shock
If you must inspect the circuitry while the power is
on, do not touch the live parts.
(Failure to heed this warning may result
in electric shock.)
Modification is prohibited
Do not modify the unit.
(Failure to heed this warning may result
in electric shock, fire and/or injury.)
Proper electric work
• Use the electric wires designated for electric work,
and conduct electric work in accordance with the
"Electric Installation Engineering Standard", the
"Indoor Wiring Regulations" and the installation
instructions.
• Make sure that the terminals and fixed wiring are
securely connected.
(Improper connection or wiring installation
may result in electric shock and/or fire.)
Scratches and deterioration
Make sure to replace scratched and/or deteriorated
wiring and lead wires.
(Failure to heed this warning may result
in electric shock and/or fire.)
Wear gloves
Always wear a pair of gloves during inspection or
repair work.
(Failure to heed this caution may result in
injury.)
Warning
Incorrect handling of the product may result in minor injury
Caution
or damage to properties including buildings and equipment.
Incorrect handling of the product may
result in serious injury or death.
Turn off the power
Make sure to turn off the earth leakage breaker
and the power switch of the product's main unit
prior to starting repair work. (The charge voltage in
the circuitry remains for another 30 seconds or so,
even after the power is turned off and the LED is
Caution against
electric shock
unlit; therefore, wait for at least 30 seconds before
disassembling the product.)
(Failure to heed this warning may result
in electric shock.)
Use proper parts and tools
Prohibited
For repair, be sure to use the parts listed in the
service parts list of the applicable model and use the
proper tools.
(Failure to heed this warning may result in
electric shock, fire and/or injury.)
Check insulation
Upon completing repair work, always measure the
insulation resistance. Verify that it is at least 10 MΩ
(with a 500 V DC insulation resistance tester), and
Be sure to follow
then turn on the power.
this instruction.
(Inadequate insulation may result in
electric shock.)
Be sure to follow
this instruction.
Be sure to follow
this instruction.
─ 3 ─
Be sure to follow
this instruction.
Be sure to follow
this instruction.
Be sure to follow
this instruction.
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