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English
NOTE
• 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 refriger-
ant 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 opera-
tion. This is not a malfunction.
A.
Adding refrigerant by using the automatic charging function
INFORMATION
The automatic refrigerant charging has limits as described below. Out
of these limits, the system cannot operate the automatic refrigerant
charging:
• Outdoor temperature: 32°F (0°C) DB -109°F (43°C) DB.
• Indoor temperature: 50°F (10°C) DB - 89°F (32°C) DB.
• Total indoor unit capacity: 80% (VRV indoor units only).
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 mode will start.
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:
01
(pres-
sure control is executed):
Then indication
02
till
03
will be displayed (start up control;
waiting stable cooling operation).
• When
03
starts flashing (ready for charging), push BS2 within
5 minutes. Open valve C. If BS2 is not pushed within 5 minutes,
an error code
P2
will appear.
Push BS1 to abort and restart the procedure.
Automatic charging will continue, the segment indication shows
the current low pressure value and the status indication
03
intermittent.
If the segment indication/user interface of indoor unit shows
PE
code, charging is almost finished. When the unit stops operating,
close valve C immediately and check whether the segment indi-
cation/user interface of indoor unit shows
P9
. This indicates the
automatic charging in cooling program was finished successfully.
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 C and
wait till
P9
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 segment display the code
E-2
in case indoor temperature is out of range or
E-3
in case the out-
door temperature is out of range. In this case, when the additional
refrigerant charging was not finished, step 6A has to be repeated.
INFORMATION
• When a malfunction is detected during the procedure (e.g, in case
of closed stop valve), an error code will be displayed. In that case,
refer to 15.5. Error 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.
Information which may occur during additional refrigerant charging
procedures:
P8
: Indoor unit freeze up prevention
Action:
Close valve C immediately. Reset malfunction by pushing
BS1. Retry auto charge procedure.
P2
: Abnormal low pressure drop
Action:
Close valve C immediately. Reset malfunction by pushing
BS1. Check following items before retry auto charge procedure:
- Check if the gas side stop valve is opened correctly.
- Check if the valve of the refrigerant cylinder is opened.
- Check if the air inlet and outlet of the indoor units are not ob-
structed.
E-2
:
Indoor temperature is out of range.
E-3
:
Outdoor temperature is out of range.
Other error code: close valve C immediately. Confirm the error code
and take corresponding action, 15.5. Error code list on page 44
.
Perform the test procedure as described in 15.4.2. Test operation on
page 44.
B.
Adding refrigerant by using the manual charging function
6B
The remaining additional refrigerant charge can be charged by
operating the outdoor unit by means of the manual refrigerant
charge operation mode:
• Turn on the power of the indoor units and outdoor unit.
• Take all the precautions mentioned in
start-up and configura
-
tion
into account.
• Activate outdoor unit setting [2-20]=1 to start manual refriger-
ant charge mode. Refer to page 37 for details.
Result:
The unit will start operation. Valve B can be opened.
Charging of remaining additional refrigerant can be done.
When the remaining calculated additional refrigerant amount is
added, close valve B and push BS3 to stop the manual refrig-
erant 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.
Perform the test procedure as described in 15.4.2. Test operation on
page 44.
INFORMATION
• When a malfunction is detected during the procedure (e.g., in case
of closed stop valve), an error code will be displayed. In that case,
refer to 15.5. Error code list on page 44 and solve the malfunction
accordingly. Resetting the malfunction can be done by pushing BS3.
The procedure can be restarted from 6B).
• Aborting the manual refrigerant charge is possible by pushing BS3.
The unit will stop and return to idle condition.
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