Gree Ultra Heat GMV Multi VRF Heat Recovery Series Service Manual page 96

Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial
The main board AP7 of the ODU consists of six function buttons:
Button Code
SW1 FUNCTION
SW2
SW3
SW4 ENTER
SW5 BACK
SW6
3.2.2 Introduction to functions
Function
Function Name
Code
Ft Test run mode
Aftersales vacuuming
A8
mode
Refrigerant recovery
A2
operation
Forcible defrosting
A3
operation
Indoor unit project number
n5
offset
Unit cooling/heating
A6
function
NH Suction temperature
NP Discharge temperature
NW Environment temperature
PL Low pressure
PM Middle pressure
PH High pressure
N1 Online ODU quantity
N9 Online IDU quantity

If above function settings are incorrect, unit will run abnormal and compressor may even be damaged.
Function Button Name and Meaning
Indicates the function button, used for function settings.
+ Indicates the upward selection button.
- Indicates the downward selection button.
Indicates the confirmation button.
Indicates the return button, used to return to the upper-level menu.
Reserved function and meaningless currently.
Used for running before factory, enable ODU controller
Automatically enables all electronic expansion valves and
electromagnetic valves during maintenance to guarantee
Fully or partially recovers refrigerants in a faulty module
or IDU pipeline according to the system pressure after
Forcibly enables ODU defrosting operation.
Prevents IDU project number conflicts when different
refrigerating systems are controlled in a centralized
Sets the unit to cooling/heating, single-cooling,
single-heating, or air supply mode for centralized
Displays the value of suction temperature.
Displays the value of discharge temperature.
Displays the value of environment temperature.
Function Meaning
Function Meaning
and parts to work fluently.
vacuum processing in all pipelines.
automatic startup during maintenance.
manner.
management.
Displays the value of low pressure.
Displays the value of middle pressure.
Displays the value of high pressure.
Displays the number of online ODUs.
Displays the number of online IDUs.
92
COMMISSIONING OPERATION
Remark
Control (CU)
function can be set
as ON or OFF
according to actual
situation.
Control (CU)
function
The factory setting
is cooling/heating.
Display (DI)
function is to
display the value of
ODU parameter.