Hitachi RAC-18GH5, Service Manual, Page: 8 / 61

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SAFETY PRECAUTION
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Please read the “Safety Precaution” carefully before operating the unit to ensure correct usage of the unit.
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Pay special attention to signs of “ Warning ” and “ Caution ”. The “Warning” section contains matters
which, if not observed strictly, may cause death or serious injury. The “Caution” section contains matters which
may result in serious consequences if not observed properly. Please observe all instructions strictly to ensure
safety.
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The sign indicate the following meanings.
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Please keep this manual after reading.
Make sure to connect earth line.
Indicates the instructions that must be followed.
The sign in the fi gure indicates prohibition.
PRECAUTIONS DURING OPERATION
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Avoid an extended period of direct air fl ow for your health.
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Do not insert a fi nger, a rod or other objects into the air outlet or inlet. As
the fan is rotating at a high speed, it will cause injury. Before cleaning, be
sure to stop the operation and turn the breaker OFF.
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During thunder storm, disconnect and turn off the circuit breaker.
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Do not use any conductor as fuse wire, this could cause fatal accident.
WARNING
PRECAUTIONS DURING INSTALLATION
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Do not reconstruct the unit.
Water leakage, fault, short circuit or fi re may occur if you reconstruct the unit by
yourself.
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Please ask your sales agent or quali fi ed technician for the installation of your unit.
Water leakage, short circuit or fi re may occur if you install the unit by yourself.
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Please use earth line.
Do not place the earth line near water or gas pipes, lightning-conductor, or the
earth line of telephone. Improper installation of earth line may cause electric
shock.
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Be sure to use the speci fi ed piping set for R410A. Otherwise, this may result in
broken copper pipes or faults.
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A circuit breaker should be installed depending on the mounting site of the unit.
Without a circuit breaker, the danger of electric shock exists.
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Do not install near location where there is fl ammable gas. The outdoor unit may
catch fi re if fl ammable gas leaks around it.
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Please ensure smooth fl ow of water when installing the drain hose.
CAUTION
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PRECAUTIONS DURING SHIFTING OR MAINTENANCE
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Should abnormal situation arises (like burning smell), please stop operating the unit
and turn off the circuit breaker. Contact your agent. Fault, short circuit or fi re may
occur if you continue to operate the unit under abnormal situation.
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Please contact your agent for maintenance. Improper self maintenance may cause
electric shock and fi re.
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Please contact your agent if you need to remove and reinstall the unit. Electric
shock or fi re may occur if you remove and reinstall the unit yourself improperly.
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If the supply cord is damaged, it must be replaced by the special cord
obtainable at authorized service/parts centers.
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