85
ENGLISH
Grounding work
Grounding must be done by a qualified installer for your safety .
Grounding the power cable
X
f
The standard of grounding may vary according to the rated voltage and installation place of the air conditioner .
X
f
Ground the power cable according to the following table .
Power condition
Installation place
Voltage to ground is lower than 150V
Voltage to ground is over 150V
High humidity
Must perform the grounding work 3 .
Note 1)
(Including the case where earth leakage breaker is installed)
Average humidity
Perform grounding work 3 .
Note 1)
Must perform the grounding work
3 .
Note 1)
(Including the case where earth leakage
breaker is installed)
Low humidity
Perform grounding work 3, if possible,
for your safety .
Note 2)
Note 1) About grounding work 3.
• Grounding work must be done by an expert (with qualification) .
• Check if the grounding resistance is lower than 100Ω . When installing a earth leakage breaker (that can cut the
electric circuit within 0 .5 second in case of a short circuit), allowable grounding resistance should be 30~500Ω .
Note 2) Grounding at dry place
• The grounding resistance should be lower than 100Ω . Even in worst case, grounding resistance should be lower
than 250Ω .
Performing the grounding work
X
f
Use a rated grounding cable by referring to the specification of the electric cable for the outdoor unit .
❇
❇
When using the exclusive grounding terminal
(When the grounding terminal is already built on
the house)
❇
❇
When using grounding of the switch board
Exclusive grounding terminal
Distributing board
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