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

18.4.6 Step 6a: To automatically charge refrigerant

RXYQQ8~20U7Y1B
VRV IV Q+ series heat pump
4P546229-1A – 2020.10
INFORMATION
For a multi outdoor unit system, it is not required to connect all charge ports to a
refrigerant tank.
The refrigerant will be charged with ±22 kg in 1 hour time at an outdoor temperature
of 30°C DB or with ±6 kg at an outdoor temperature of 0°C DB.
If you need to speed up in case of a multiple outdoor system, connect the refrigerant
tanks to each outdoor unit.
NOTICE
▪
The refrigerant charging port is connected to the piping inside the unit. The unit's
internal piping is already factory charged with refrigerant, so be careful when
connecting the charge hose.
▪
After adding the refrigerant, do not forget to close the lid of the refrigerant
charging port. The tightening torque for the lid is 11.5 to 13.9 N•m.
▪
In order to ensure uniform refrigerant distribution, it may take the compressor
±10 minutes to start up after the unit has started operation. This is not a
malfunction.
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:
".
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
18 Piping installation
|
" (pressure control is executed):
Then
" will be displayed (start
" will be displayed (start
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