Operation Flow Of Outdoor Unit; Air Supply Operation - Gree GMV-S120WL/A-S Service Manual

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Air Supply Operation

1.2.2 Operation Flow of Outdoor Unit

Enter
commissioning
Commissioning
is completed.
GMV5 Home DC Inverter Multi VRF Units
Air supply
Guide louver
Yes
Guide louver swings
Fan: setting speed
Electric expansion
valve: controlled by
mode of air supply
A
Power on
Commissioni
NO YES
ng is done or
not?
Cooling
mode,
cooling and
water heating
mode
(outdoor heat
exchanger as
condenser)
NO
Unit is
started on?
YES
Cooling
mode, cooling
and water
heating mode
(outdoor heat
exchanger as
condenser)
There is
YES
malfunction
or not?
NO
In the
NO
operation of
oil return?
YES
Oil return is in
operation.
No
Identify
operating
mode
NO
Unit is started
Unit stops.
mode, heating
and water
heating mode,
water heating
mode, cooling
and water
heating mode
(outdoor heat
exchanger as
evaporator)
Unit stops
YES
because of
malfunction
malfunction.
Defrosting/Oil
Malfunction
return is in
is eliminated?
operation?
Oil return is in
operation.
57
Heating
mode, heating
and water
heating mode,
water heating
mode, cooling
and water
heating mode
(outdoor heat
exchanger as
evaporator)
on?
Heating
是
There is
or not?
NO
NO
YES
Defrosting/