Hitachi RAS-5HVRNM2 - Page 53

TC-12001
2-125
OUTDOOR UNIT
P5414950-rev.1
49
Do NOT operate the air conditioners to check
the electrical wiring, etc until the preparation of
the test run is completed.
(f) According to the label “Checking Method
by 7-Segment Display” attached to the rear
side of the service cover of the outdoor
unit, check the temperature, the pressure
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portions, and check the connected indoor
unit numbers by 7-segment displays.
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default setting) or press “
“ (run / stop)
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O
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or disconnecting connector, disconnecting
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O
Small sound may be heard from the
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source because the electrical expansion
valve is activated to adjust the opening.
Therefore, there is no abnormality of the
unit.
O
Sound may be heard from the outdoor
unit for seconds after running or stopping
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defrosting, etc. It generates because of
the pressure difference inside the piping
from the compressor. Therefore, there is
no abnormality of the unit.
(4) ,QWKHFDVHRIWKHWZLQWULSOHDQGTXDG
combination, check the air outlet temperature
of each indoor unit. If there is the large
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units (cooling: approx. more than 10deg,
KHDWLQJDSSUR[PRUHWKDQGHJLWPD\EH
WKHIDLOXUHRIWKHUHIULJHUDQWSLSLQJZRUN7KXV
recheck the refrigerant piping.