About Charging Refrigerant - Daikin VRV IV+ Installer And User Reference Manual

18.4.2 About charging refrigerant

REYQ8~20+REMQ5U7Y1B
VRV IV+ heat recovery
4P561154-1A – 2020.10
NOTICE
If operation is performed within 12 minutes after the indoor and outdoor units are
powered on, the compressor will not operate before the communication is
established in a correct way between outdoor unit(s) and indoor units.
NOTICE
Before starting charging procedures, check if the 7‑segment display indication of the
outdoor unit A1P PCB is as normal (see
malfunction code is present, see
4
codes" [ 154].
NOTICE
Make sure all connected indoor units are recognised (see [1‑10] and [1‑39] in
1: Monitoring
NOTICE
Close the front panel before any refrigerant charge operation is executed. Without
the front panel attached the unit cannot judge correctly whether it is operating
properly or not.
NOTICE
In case of maintenance and the system (outdoor unit+field piping+indoor units) does
not contain any refrigerant any more (e.g., after refrigerant reclaim operation), the
unit has to be charged with its original amount of refrigerant (refer to the nameplate
on the unit) by pre-charging before the automatic charging function can be started.
Once vacuum drying is finished, additional refrigerant charging can start.
There are two methods to charge additional refrigerant.
Method
Automatic charge
Manual charge
INFORMATION
Adding refrigerant using the automatic refrigerant charging function is not possible
when Hydrobox units are connected to the system.
To speed up the refrigerant charging process, it is in case of larger systems
recommended to first pre-charge a portion of refrigerant through the liquid line
before proceeding with the actual automatic or manual charging. This step is
included in below procedure (see
skipped, but charging will take longer then.
A flow chart is available which gives an overview of the possibilities and actions to
be taken (see "To charge refrigerant: Flow
"24.1 Solving problems based on error
settings" [ 4 127]).
"Step 6a: To automatically charge
refrigerant" [
"Step 6b: To manually charge
refrigerant" [
"To charge
chart" [
18 Piping installation
|
"To access mode 1 or 2" [
See
4
104]
4
106]
4
refrigerant" [ 102]). It can be
4
100]).
Installer and user reference guide
4
124]). If a
"Mode
97