GMV5 Home DC Inverter Multi VRF Units
198
Check if height difference among
indoor units are in conformity with
design requirement of unit?
Check if the length of pipeline
between outdoor unit and the
farthest indoor unit is less or equal
to 120m?
Check if the total length of pipeline
is less than 300m?
Check if the length from outdoor
unit to the first branch pipe is larger
than 90m? If it is, does the pipe
diameter need to be enlarged?
when it is larger
than 90m, the pipe
diameter should be
accordingly
enlarged.
Check if the distance between
indoor unit to its nearest branch
pipe is larger than 10m? If it is, does
the pipe diameter need to be
enlarged?
when it is larger
than 10m, the pipe
diameter should be
accordingly
enlarged.
Inclination pitch of indoor and
outdoor branch pipes should not be
over the required ranged.
Install it horizontally,
refer to installation
of branch pipe.
Check if all the cut-off valves of
outdoor unit are opened as large as
possible?
Check if pressure of refrigerant is
normal? Use high pressure gauge
to connect to valve of liquid pipe of
outdoor unit, and use low pressure
gauge to connect to valve of air pipe
of outdoor unit, and then read the
numerical value respectively.
At this time, high
pressure and low
pressure of system
is in an equal
status, and the
difference between
saturation
temperature and
ambient
temperature (take
the higher one in
indoor and outdoor
temperature) should
not be over 5C,
otherwise please
check if there is
leakage in outdoor
unit.
Check if there is oil stain of
refrigerant oil in valve? If there is,
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