6 Installation
Installer and user reference guide
32
RYYQ+RYMQ+RXYQ8~20U7Y1B
VRV IV+ heat pump
4P546228-1 – 2018.09
4
When "
" or "
" 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:
If
Then
Heating operation
"
" will be flashing. Push BS2 to
restart the procedure.
Cooling operation
Malfunction code "
" will appear. Push
BS1 to abort and restart the procedure.
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 "
" will appear. When BS2
is pushed, the 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
If
Then
"
", "
", or "
"
appears
Push BS1 to finish the automatic
charging function procedure. The
ambient conditions are favourable to
execute the test run.
"
", or "
" appears
The ambient conditions are NOT
favourable to execute the test run. Push
BS1 to finish the automatic charging
procedure.
INFORMATION
In case a malfunction code occurred during this automatic
charging procedure, the unit will stop and indicate "
"
flashing. Push BS2 to restart the procedure.
Cooling (middle 7‑segment display indicates " ")
Automatic charging will continue, the 7‑segment display indication
shows the current low pressure value and the status indication "
" intermittent.
If the 7‑segment display indication/user interface of indoor unit
shows "
" code, charging is almost finished. When the unit stops
operating, close valve A immediately and check whether the
7‑segment display indication/user interface of indoor unit shows "
". This indicates the automatic charging in cooling program was
finished successfully.
INFORMATION
When the charging amount is little, the "
" code may not
be displayed, but instead the "
" code will be displayed
immediately.
When the required (calculated) additional refrigerant
amount is already charged before "
" or "
" indication
appears, close valve A and wait till "
" is displayed.
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 7‑segment display "
" in case
indoor temperature is out of range or "
" in case the outdoor
temperature is out of range. In this case, when the additional
refrigerant charging was not finished, step
automatically charge refrigerant" on page 31
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
problems based on error codes" on page 50
the malfunction accordingly. Resetting the malfunction
can be done by pushing BS1. The procedure can be
restarted from
"6.7.6 Step 6a: To automatically charge
▪ Aborting the automatic refrigerant charge is possible by
pushing BS1. The unit will stop and return to idle
condition.
Perform the test procedure as described in
.
6.7.7
Step 6b: To manually charge refrigerant
The remaining additional refrigerant charge can be charged by
operating the outdoor unit by means of the manual refrigerant
charge operation mode:
1
Take all the precautions mentioned in
into account.
2
Turn on the power of the indoor units and outdoor unit.
3
Activate outdoor unit setting [2‑20]=1 to start manual refrigerant
charge mode. Refer to
"7.2.8 Mode 2: Field settings" on
Result:
The unit will start operation.
4
Valve A can be opened. Charging of remaining additional
refrigerant can be done.
5
When the remaining calculated additional refrigerant amount is
added, close valve A and push BS3 to stop the manual
refrigerant charging procedure.
INFORMATION
The manual refrigerant charge operation will automatically
stop within 30 minutes. If charging is not completed after
30 minutes, perform the additional refrigerant charging
operation again.
6
Perform
the
test
procedure
as
described
in
.
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
codes when charging refrigerant" on page 33
solve the malfunction accordingly. Resetting the
malfunction can be done by pushing BS3. The
procedure can be restarted from
manually charge refrigerant" on page 32
.
▪ Aborting the manual refrigerant charge is possible by
pushing BS3. The unit will stop and return to idle
condition.
