Service Manual

– 7 –
Execute
discharge
between
terminals.
Prohibition
Stay on
protection
Even if the circuit breaker has been set to the OFF position before the service panel is removed
and the electrical parts are repaired, you will still risk receiving an electric shock.
For this reason, short-circuit the high-voltage capacitor terminals to discharge the voltage before
proceeding with the repair work.
For details on the short-circuiting procedure, refer to the Service Manual.
You may receive an electric shock if the voltage stored in the capacitors has not been sufficiently
discharged.
Place a “Work in progress” sign near the circuit breaker while the installation, maintenance, repair
or removal work is being carried out.
There is a danger of electric shocks if the circuit breaker is set to ON by mistake.
If, in the course of carrying out repairs, it becomes absolutely necessary to check out the
electrical parts with the electrical parts box cover of one or more of the indoor units and the
service panel of the outdoor unit removed in order to find out exactly where the trouble lies, wear
insulated heat-resistant gloves, insulated boots and insulated work overalls, and take care to
avoid touching any live parts.
You may receive an electric shock if you fail to heed this warning. Only qualified service person
(∗1) is allowed to do this kind of work.
WARNING
Check earth
wires.
Prohibition of
modification.
Use specified
parts.
Do not bring
a child close to
the equipment.
Insulating
measures
No fire
Before troubleshooting or repair work, check the earth wire is connected to the earth terminals of
the main unit, otherwise an electric shock is caused when a leak occurs.If the earth wire is not
correctly connected, contact an electric engineer for rework.
After completing the repair or relocation work, check that the ground wires are connected properly.
Be sure to connect earth wire. (Grounding work) Incomplete grounding causes an electric shock.
Do not connect ground wires to gas pipes, water pipes, and lightning rods or ground wires for
telephone wires.
Do not modify the products.Do not also disassemble or modify the parts.
It may cause a fire, electric shock or injury.
When any of the electrical parts are to be replaced, ensure that the replacement parts satisfy the
specifications given in the Service Manual (or use the parts contained on the parts list in the
Service Manual).
Use of any parts which do not satisfy the required specifications may give rise to electric shocks,
smoking and/or a fire.
If, in the course of carrying out repairs, it becomes absolutely necessary to check out the
electrical parts with the electrical parts box cover of one or more of the indoor units and the
service panel of the outdoor unit removed in order to find out exactly where the trouble lies, place
"Keep out" signs around the work site before proceeding.
Third-party individuals may enter the work site and receive electric shocks if this warning is not
heeded.
Connect the cut-off lead wires with crimp contact, etc, put the closed end side upward and then
apply a water-cut method, otherwise a leak or production of fire is caused at the users’ side.
When performing repairs using a gas burner, replace the refrigerant with nitrogen gas because
the oil that coats the pipes may otherwise burn.
When repairing the refrigerating cycle, take the following measures.
1) Be attentive to fire around the cycle.
When using a gas stove, etc, be sure to put out fire before work; otherwise the oil mixed with
refrigerant gas may catch fire.
2) Do not use a welder in the closed room.
When using it without ventilation, carbon monoxide poisoning may be caused.
3) Do not bring inflammables close to the refrigerant cycle, otherwise fire of the welder may catch
the inflammables.