GMV5 DC INVERTER VRF UNITS SERVICE MANUAL
85
2. Introduction to Functions
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. 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:
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