Daikin GYEQ20AN Service Manual page 6

Introduction
1.1 Safety Precautions
Safety precautions to take before and during inspection or repair
v
Safety precautions
Warning
Caution
Before you perform disassembly and assembly, be sure to turn
OFF the main power switch.
Take extreme care not to touch the charging unit during work;
otherwise you may get an electric shock, possibly resulting in a
fatal accident or serious injury.
While the power is being supplied, some electrical parts are
charged with high voltages from 200 V to 300 V. Inadvertently
touching such high-voltage parts could result in a possibly fatal
electric shock.
When accessing the electrical system (for example, to locate
faulty parts), take sufficient care not to inadvertently touch the
charging unit. Also, be sure to disconnect the main power
connector from the outlet before replacing parts.
If refrigerant gas is leaking, pinpoint and permanently fix the
leaking spot, rather than merely charging the refrigerant.
After fixing the leaks, charge the refrigerant and then recheck for
any leaks.
If you cannot pinpoint the leaking spot and thus cannot continue
the repair work, recover the refrigerant and then close the
servicing valve.
Failure to recover the refrigerant could cause the refrigerant gas
to leak into the air-conditioned room.
The refrigerant itself is harmless but can cause the generation of
toxic gas when it is exposed to high temperatures associated with
a fan, heater, stove, burner, or the like.
When working in high places, be sure to use a helmet and/or
lifeline in case you topple or fall; otherwise, you could face a
greater risk of a fatal accident or serious injury.
When you repair parts contained in a compartment (particularly
the engine room) inside a unit such as an outdoor unit with the
unit's panels removed, be sure to wear protective gloves and
other clothing to prevent injuries that may occur as the result of
inadvertently touching protrusions or edges inside the unit and
follow the specified procedure.
If you have to repair parts with the power ON, be sure to attach a
protective cover before turning ON the power.
Working without a protective cover attached could possibly result
in an electric shock or injury.
When accessing a compressor to check for or repair faulty parts,
never touch the compressor with bare hands while it is operating
or when it has just stopped; otherwise, you could get burned.
When installing a fan, properly tighten the fan screw.
If poorly tightened, the fan may come off while operating, possibly
resulting in an injury.
Do not work in an improper position when you carry or move a
heavy object.
Working in an improper position could result in an acute low back
pain or an injury due to dropping of a heavy object.
When repairing parts, use tools that suit your purpose.
Using inappropriate tools could result in an injury.
During repair work, take sufficient care to keep away people other
than service engineers, because unexpected dangers may be
present.
SiAUY361411EA