GREE GMV5E DC INVERTER VRF UNITS SERVICE MANUAL
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2.2.2. Introduction to Functions
2.2.2.1 List of functions
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.
Unit
cooling/heating
function
Sets the unit to cooling/heating,
single-cooling, single-heating, or air supply
mode for centralized management.
It can be
set and
queried.
Sets different silent modes to meet users'
noise requirements.
It can be
set and
queried.
Aftersales
vacuuming
mode
Automatically
enables all electronic expansion valves and
electromagnetic valves during maintenance
to guarantee vacuum processing in all
pipelines.
Automatically decreases the power
consumption of the unit according to
system operation parameters.
No automatic
conservation
settings
It can be
set and
queried.
Forcible
defrosting
operation
Forcibly enables ODU defrosting operation.
Forcibly decreases the maximum power
consumption of the unit.
No capacity
output limitation
settings
It can be
set and
queried.
Indoor unit
project number
offset
Prevents IDU project number conflicts
when different refrigerating systems are
controlled in a centralized manner.
Queries historical fault information of the
ODU.
Queries real-time operation parameters of
the ODU.
Indoor unit
project number
query
Displays project numberes of all IDUs
through ODU operations.
Online IDU
quantity query
Displays the number of online IDUs.
Outdoor unit
bar code
function query
Queries the entire-unit bar code and
controller bar code of ODU.
2.2.2.2 Description of Functions
(1) A2 Refrigerant recovery operation
This function partially recovers refrigerants in a faulty module or IDU pipeline during unit
maintenance. The refrigerant recovery volume of each basic module is as follows:
Maximum Refrigerant Recovery Volume (kg)
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