Specifications
RXYQQ8~20T7Y1B
VRV IV System Air Conditioner
4P345099-1 – 2013.04
Installation and operation manual
35
A. Adding refrigerant by using the automatic charging function
6A 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
Idle (default) screen is shown.
Push BS2 once, indication "888".
Push BS2 for more than 5 seconds, wait while the unit is
preparing for operation. Segment display indication: "t01"
(pressure control is executed):
- In case heating operation is started: indication "t22" till
"t23" will be displayed (start up control; waiting stable
heating operation).
- In case cooling operation is started: indication "t02" till
"t03" will be displayed (start up control; waiting stable
cooling operation).
When "t23" or "t03" starts flashing (ready for charging), push
BS2 within 5 minutes. Open valve A. If BS2 is not pushed
within 5 minutes, a malfunction code will appear:
- heating operation: "t26" will be flashing. Push BS2 to
restart the procedure.
- cooling operation: malfunction code "P2" will appear.
Push BS1 to abort and restart the procedure.
Heating (middle segment indicates "2")
Charging will continue, the segment indication intermittently
shows the current low pressure value and the status indication
"t23".
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 "t26" will appear. When
BS2 is pushed, the unit will check whether the ambient
conditions are favourable to execute the test run.
-if "t01", "t02", or "t03" appears, push BS1 to finish the
automatic charging function procedure. The ambient
conditions are favourable to execute the test run.
- if the unit indicates "E-2", or "E-3", the ambient conditions are
NOT favourable to execute the test run. Push BS1 to finish
the automatic charging procedure.
Cooling (middle segment indicates "0")
Automatic charging will continue, the segment indication shows
the current low pressure value and the status indication "t03"
intermittent.
If the segment indication/user interface of indoor unit shows "PE"
code, charging is almost finished. When the unit stops operating,
close valve A immediately and check whether the segment
indication/user interface of indoor unit shows "P9". This indicates
the automatic charging in cooling program was finished
successfully.
If during the cooling operation for the automatic refrigerant
charge the ambient conditions go beyond the allowable for this
operation mode, the unit will indicate on the segment display the
de "E-2" in case indoor temperature is out of range or "E-3" in
case the outdoor temperature is out of range. In this case, when
the additional refrigerant charging was not finished, step 6A. has
to be repeated.
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°C DB~43°C DB.
Indoor temperature: 10°C DB~32°C DB.
Total indoor unit capacity: ≥80%.
INFORMATION
In case a malfunction code occurred during this automatic
charging procedure, the unit will stop and indicate "t26"
flashing. Push BS2 to restart the procedure.
INFORMATION
When the charging amount is little, the "PE" code may not
be displayed, but instead the "P9" code will be displayed
immediately.
When the required (calculated) additional refrigerant
amount is already charged before "PE" or "P9" indication
appears, close valve A and wait till "P9" is displayed.
INFORMATION
When a malfunction is detected during the procedure
(e.g, in case of closed stop valve), a malfunction code
will be displayed. In that case, refer to
"15.5. Malfunction code list" on page 44 and solve the
malfunction accordingly. Resetting the malfunction
can be done by pushing BS1. The procedure can be
restarted from 6A).
Aborting the automatic refrigerant charge is possible
by pushing BS1. The unit will stop and return to idle
condition.