Westinghouse WHU09DHA21S, Service Manual, Page: 2 / 97

SAFETY SUMMARY
IMPORTANT NOTICE
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We pursue a policy of continuing improvement in design and performance of products. The right is
therefore reserved to vary specifications without notice.
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We cannot anticipate every possible circumstance that might involve a potential hazard.
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This air conditioner is designed for standard air conditioning only. Do not use this air conditioner for
other purposes such as drying clothes, refrigerating foods or for any other cooling or heating process.
Do not let the air-out face animals or plants, it might have an adverse effect on
them .
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The installer and system specialist shall secure safety against leakage according to local regulations
or standards.
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Signal words (DANGER, WARNING and CAUTION) are used to identify levels of hazard seriousness.
Definitions for identifying hazard levels are provided below with their respective signal words.
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Installation should be performed by the dealer or other professional personnel. Improper installation
may cause water leakage, electrical shock, or fire.
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Do not perform installation work, refrigerant piping work, drain piping and electrical wiring connection
without referring to our installation manual. If the instructions are not followed, it may result in water
leakage, electric shock or fire.
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Use refrigerant R 410A in the refrigerant cycle.
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Do not pour water into the indoor or outdoor unit. These products are equipped with electrical parts. If
poured, it will cause a serious electrical shock.
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Do not open the service cover or access panel for the indoor or outdoor units without turning OFF the
main power supply.
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Do not touch or adjust safety devices inside the indoor or outdoor units. If these devices are touched
or readjusted, it may cause a serious accident.
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Refrigerant leakage can cause difficulty in breathing due to insufficient air. Turn OFF the main switch,
extinguish any naked flames and contact your service contractor, if refrigerant leakage occurs.
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Do perform air-tight test. Do not charge oxygen, acetylene or other flammable and poisonous gas
es
into the refrigerant cycle when performing a leakage test or an air-tight test. These types of gas
es
are
extremely dangerous and can cause an explosion. It is recommended that nitrogen be used for this
test.
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The installer and system specialist shall secure safety against refrigerant leakage according to local
regulations or standards.
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Use an ELB (Electric Leakage Breaker). In the event of a fault, there is danger of an electric shock or
a fire if it is not used.
Immediate hazards which WILL result in severe personal injury or death.
Hazards or unsafe practices which COULD result in severe personal injury or
death.
Hazards or unsafe practices which COULD result in minor personal injury or
product or property damage.
Useful information for operation and/or maintenance.
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Notices:
• Product specifications and design are subject to change without notice for future improvement.
• For further details, please check with our authorized dealer.