Step 6A: To Automatically Charge Refrigerant - Daikin VRV IV+ Installer And User Reference Manual

6 | Installation

6.7.6 Step 6a: To automatically charge refrigerant

Installer and user reference guide
72
INFORMATION
The automatic refrigerant charging has limits as described below. Out of these limits,
the system cannot operate the automatic refrigerant charging:
▪
Outdoor temperature: 0~43°C DB.
▪
Indoor temperature: 10~32°C DB.
▪
Total indoor unit capacity: ≥80%.
The remaining additional refrigerant charge can be charged by operating the
outdoor unit by means of the automatic refrigerant charge operation mode.
Depending on the ambient limitation conditions (see above), the unit will
automatically decide which operation mode will be used to fulfill the automatic
refrigerant charge: cooling or heating. If above conditions are fulfilled, cooling
operation will be selected. If not, heating.
Procedure
1 Idle (default) screen is shown.
2 Push BS2 once.
Result: Indication "
3 Push BS2 for more than 5 seconds, wait while the unit is preparing for
operation. 7‑segment display indication: "
If
Heating operation is started
Cooling operation is started
4 When " " or "
minutes. Open valve A. If BS2 is not pushed within 5 minutes, a malfunction
code will appear:
If
Heating operation
Cooling operation
Heating (middle 7‑segment display indicates " ")
Charging will continue, the 7‑segment display indication intermittently shows the
current low pressure value and the status indication "
When the remaining additional refrigerant amount is charged, close valve A
immediately and push BS3 to stop charging operation.
After BS3 is pushed, the ending code "
unit will check whether the ambient conditions are favourable to execute the test
run.
Test run including detailed refrigerant status check is required to use the leak
detection functionality. More information, see "8 Commissioning" [
".
Indication " " till "
up control; waiting stable heating operation).
Indication " " till "
up control; waiting stable cooling operation).
" starts flashing (ready for charging), push BS2 within 5
" " will be flashing. Push BS2 to restart the
procedure.
Malfunction code " " will appear. Push BS1 to
abort and restart the procedure.
" will appear. When BS2 is pushed, the
" (pressure control is executed):
Then
" will be displayed (start
" will be displayed (start
Then
".
4
108].
RYYQ+RYMQ+RXYQ8~20U7Y1B
VRV IV+ heat pump
4P546228-1A – 2019.10