NOTE
r The refrigerant charging port is connected to the piping inside the
unit. The unit’s internal piping is already factory charged with refrig-
erant, so be careful when connecting the charge hose.
r After adding the refrigerant, do not forget to close the lid of the
refrigerant charging port. The tightening torque for the lid is 8.48 to
10.3 ft
x
lbf (11.5 to 13.9 N
x
m).
r 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:
r Outdoor temperature: 32°F (0°C) DB -109°F (43°C) DB.
r Indoor temperature: 50°F (10°C) DB - 89°F (32°C) DB.
r 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
VQHWNƂNNVJGCWVQOCVKETGHTKIGTCPVEJCTIGEQQNKPIQTJGCVKPI+H
CDQXGEQPFKVKQPUCTGHWNƂNNGFEQQNKPIQRGTCVKQPYKNNDGUGNGEVGF+H
not, heating mode will start.
Procedure
r Idle (default) screen is shown.
r Push BS2 once, indication
888
.
r Push BS2 for more than 5 seconds, wait while the unit is
preparing for operation. Segment display indication:
01
(pres-
UWTGEQPVTQNKUGZGEWVGF
- In case heating operation is started: indication
22
till
23
will be displayed (start up control; waiting stable heating
operation).
- In case cooling operation is started: indication
02
till
03
will be displayed (start up control; waiting stable cooling
operation).
r When
23
or
03
UVCTVUƃCUJKPITGCF[HQTEJCTIKPIRWUJ
BS2 within 5 minutes. Open valve A. If BS2 is not pushed within
5 minutes, a malfunction code will appear:
- Heating operation:
26
YKNNDGƃCUJKPI2WUJ$5VQTGUVCTV
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
23
.
When the remaining additional refrigerant amount is charged,
close valve A immediately and push BS3 to stop charging opera-
tion.
After BS3 is pushed, the ending code
26
will appear. When BS2
is pushed, the unit will check whether the ambient conditions are
HCXQTCDNGVQGZGEWVGVJGVGUVTWP
- If
01
,
02
, or
03
CRRGCTURWUJ$5VQƂPKUJVJGCWVQ-
matic charging function procedure. The ambient conditions
CTGHCXQTCDNGVQGZGEWVGVJGVGUVTWP
- If the unit indicates
E-2
, or
E-3
, the ambient conditions are
016HCXQTCDNGVQGZGEWVGVJGVGUVTWP2WUJ$5VQƂPKUJVJG
automatic charging procedure.
INFORMATION
In case a malfunction code occurred during this automatic charging
procedure, the unit will stop and indicate
26
ƃCUJKPI2WUJ$5VQ
restart the procedure.
Cooling (middle segment indicates
0
)
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
EQFGEJCTIKPIKUCNOQUVƂPKUJGF9JGPVJGWPKVUVQRUQRGTCVKPI
close valve A immediately and check whether the segment indi-
cation/user interface of indoor unit shows
P9
. This indicates the
CWVQOCVKEEJCTIKPIKPEQQNKPIRTQITCOYCUƂPKUJGFUWEEGUUHWNN[
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.
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
TGHTKIGTCPVEJCTIKPIYCUPQVƂPKUJGFUVGR#JCUVQDGTGRGCVGF
INFORMATION
r When a malfunction is detected during the procedure (e.g, in case
of closed stop valve), a malfunction code will be displayed. In that
ECUGTGHGTVQ/CNHWPEVKQPEQFGNKUVQPRCIG|CPFUQNXG
the malfunction accordingly. Resetting the malfunction can be done
by pushing BS1. The procedure can be restarted from 6A.).
r 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 15.4.2. Test operation on
RCIG|
B
. Adding refrigerant by using the manual charging function
6B The remaining additional refriger
ant charge can be charged by
operating the outdoor unit by means of the manual refrigerant
charge operation mode:
r
Tu r
n on the power of the indoor units and outdoor unit.
r
Ta k
e all the precautions mentioned in UVCTVWR
CPFEQPƂIWTC-
tion
into account.
r
Activate outdoor unit setting [2-20]=1 to star
t manual refriger-
CPVEJCTIGOQFG4GHGTVQRCIG|HQTFGVCKNU
Result: The unit will start operation. Valve A can be opened.
Charging of remaining additional refrigerant can be done.
When the remaining calculated additional refrigerant amount is
added, close valve A 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.
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