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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.

◆ Are sizes of connection lines and the air switch proper?

◆ Does wiring comply with relative standards and electric codes?

◆ Is there any incorrect wiring?

◆ Does each contact work properly?

◆ Is the power supply and insulation proper?

◆ Are initial set points of control and protective elements satisfied?

1�2 Check for the Water System

◆ Are water inlet and outlet directions correct?

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

◆ Is insulation of water pipes in good condition?

◆ 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.

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�

Ambient temperature sensor error

Defrost temperature sensor error

Discharge temperature sensor error

Suction temperature sensor error

Outdoor fan error

Compressor internal overload protection

Test Operation & Troubleshooting & Maintenance

AP1

CN5

CN6

CN7

CN8

AP2

Full Name

Long-distance

Minitor PC(BMS)

CN5(Red)

CN4(White)

Wired controller

Displayed Name

Ambient sensor

Defro. sensor

Disch. sensor

Suction sensor

Outdoor fan

Comp. overload

Error Code