Gree Versati II Series, Service Manual

1

Test Operation & Troubleshooting & Maintenance

1 Trial Run

1�1 Check for Wiring
WARNING!

Do not check for the power supply unless proper checkout equipment has prepared and preventive 

measures have been taken, otherwise it would lead to severe injury.

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Are sizes of connection lines and the air switch proper?

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Does wiring comply with relative standards and electric codes?

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Is there any incorrect wiring?

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Does each contact work properly?

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Is the power supply and insulation proper?

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Are initial set points of control and protective elements satisfied?

1�2 Check for the Water System

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Are water inlet and outlet directions correct?

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Is the water piping cleaned? Are there foreign matters at the pipe joints? Is the water quality satisfied?

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Is insulation of water pipes in good condition?

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Does exhaust valve of the water system work properly? 

1�3 Check for the Communication System

When the unit is powered on, check for the communication system, including: communication between AP1 

and AP2, between the wired controller and the main board. When there is unusual communication, this error will 
be displayed at the wired controller. Then, check out the cause according to the displayed error. See the figure 
below for wiring of the communication system.

CN8

CN7

CN6

CN5

AP1

AP2

Wired controller

CN5(Red)

Long-distance

Minitor PC(BMS)

CN4(White)

1�4 Trial Run

Start the unit when there is no any problem for wiring and piping. After startup, check for the electrostatic 

expansion valve, water pump, fan, and compressor to see if they work normally. When there is any error, solve 
it according to the troubleshooting flowchart covered in this manual. However, if the troubleshooting flowchart is 
still unhelpful, please contact GREE sales agent.

2 Error Code List

No�

Full Name

Displayed Name

Error Code

1

Ambient temperature sensor error

Ambient sensor

F4

2

Defrost temperature sensor error

Defro. sensor

d6

3

Discharge temperature sensor error

Disch. sensor

F7

4

Suction temperature sensor error

Suction sensor

F5

5

Outdoor fan error

Outdoor fan

EF

6

Compressor internal overload protection

Comp. overload

H3