Gree Ultra Heat GMV-V72W/A-F, Service Manual, Page: 83 / 240

Ultra Heat GMV VRF Technical Service Manual COMMISSIONING OPERATION
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3.2.1 Introduction to function buttons

When function buttons are used to set functions for outdoor unit, the cover of electric box and panel
must be assembled well. Setting can only be done through the maintenance window. Otherwise, electric
shock may occur.
The main board AP7 of the ODU consists of six function buttons:
Function Button Name and Meaning
Button Code Function Meaning
SW1 FUNCTION Indicates the function button, used for function settings.
SW2 + Indicates the upward selection button.
SW3 - Indicates the downward selection button.
SW4 ENTER Indicates the confirmation button.
SW5 BACK Indicates the return button, used to return to the upper-level menu.
SW6 Reserved function and meaningless currently.
3.2.2 Introduction to functions
Function
Code
Function Name Function Meaning Remark
Ft Test run mode
Used for running before factory, enable ODU controller
and parts to work fluently.
Control (CU)
function can be set
as ON or OFF
according to actual
situation.
A8
Aftersales vacuuming
mode
Automatically enables all electronic expansion valves and
electromagnetic valves during maintenance to guarantee
vacuum processing in all pipelines.
A2
Refrigerant recovery
operation
Fully or partially recovers refrigerants in a faulty module
or IDU pipeline according to the system pressure after
automatic startup during maintenance.
A3
Forcible defrosting
operation
Forcibly enables ODU defrosting operation.
NH Suction temperature Displays the value of suction temperature.
Display (DI)
function is to
display the value of
ODU parameter.
NP Discharge temperature Displays the value of discharge temperature.
NW Environment temperature Displays the value of environment temperature.
PL Low pressure Displays the value of low pressure.
PM Middle pressure Displays the value of middle pressure.
PH High pressure Displays the value of high pressure.
N1 Online ODU quantity Displays the number of online ODUs.
N9 Online IDU quantity Displays the number of online IDUs.