CONTROL 0 12 0
GMV5 COMPACT MULTI VRF UNIT
SERVICE MANUAL
Functions of various modules:
A Filter plate: one of the two key functions is to filter and eliminate power interferences and ensure
anti-interference capability of the unit even in a rugged power supply environment; the other one is to suppress
interferences from power supply in order to prevent the operation of the unit from affecting other appliances such
as TV. Because inverter unit works in a special way that is relatively sensitive to interferences, filter plate is
normally arranged. Because 3-phase power supply is used for the unit, 3-phase filter plate that uses 3-stage filtering
mode shall be employed. Input terminals of 3-phase filter plate are respectively AC-L1, AC-L2, AC-L3 and N, and
corresponding output terminals are respectively L1-OUT, L2-OUT, L3-OUT and N-OUT.
B Drive board is a key part of control system. Receiving commands from the main control board, the drive
board can transform 380V, 50Hz, 3-phase commercial power into AC power with adjustable amplitude and
frequency, capable to drive compressor.
1.2 Operation Flowchart of the unit
1.2.1 Operation Flowchart of the Indoor Unit
Start Indicating Light Is ON
Start/Stop
Display The Last Setting s Of Air
Stop
Initialization Of electronic Expansion Valve
Connecting To Power Supply
Volume:Air Supply Direction
Start Indicating Light OFF
Is The Protecting
Start Display:Flickering
Abnormality Code Display
Yes
Start
Is The Start Indicating
Press The Start / Stop Switch
Yes
No
No
Start Indicating Light ON Air
Volume Setting Display
Displaying Air Supply Direction
Setting Display Displaying
Temperature Setting Display
Displaying
Start Display : OFF Abnormal
Mode Display
Air Supply Or Temperature
Cooling Or Heatig?
Air Supply Blower : Stop
Electronic Expansion
Guide Louve r : Stop
Heating
Operation Air
Cooling
Operation
Air Supply
Operation
Air Supply
Temperature
Adjustment
Cooling
Heating
A
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