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NOTE
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.
After adding the refrigerant, do not forget to close the cover of the
refrigerant charging port. The tightening torque for the cover is 8.48
to 10.3 ft
lbf (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.
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6a The remaining additional refrigerant charge can be charged by
operating the outdoor unit by means of the automatic refrigerant
charging operation mode.
Depending on the ambient limitation conditions (see above), the
unit will automatically decide which operation mode will be used
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not, heating mode will start.
Procedure
Idle (default) screen is shown.
Push BS2 once, indication
Push BS2 for more than 5 seconds, wait while the unit is
preparing for operation. Segment display indication:
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- In case heating operation is started: indication
will be displayed (start up control; waiting stable heating
operation).
- In case cooling operation is started: indication
will be displayed (start up control; waiting stable cooling
operation).
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When
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BS2 within 5 minutes. Open valve A. If BS2 is not pushed within
5 minutes, a malfunction code will appear:
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- Heating operation:
the procedure.
- Cooling operation: malfunction code
Push BS1 to abort and restart the procedure.
Heating (middle segment indicates
Charging will continue, the segment indication intermittently
shows the current low pressure value and the status indication
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.
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
is pushed, the unit will check whether the ambient conditions are
or
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01
02
03
- If
,
, or
matic charging function procedure. The ambient conditions
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888
.
01
(pres-
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23
till
02
03
till
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P2
will appear.
2
)
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will appear. When BS2
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- If the unit indicates
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automatic charging procedure.
INFORMATION
In case a malfunction code occurred during this automatic charging
procedure, the unit will stop and indicate
restart the procedure.
Cooling (middle segment indicates
Automatic charging will continue, the segment indication shows
the current low pressure value and the status indication
intermittent.
If the segment indication/user interface of indoor unit shows
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close valve A immediately and check whether the segment indi-
cation/user interface of indoor unit shows
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INFORMATION
When the charging amount is little, the
P9
but instead the
code will be displayed immediately.
When the required (calculated) additional refrigerant amount is
already charged before
P9
wait till
is displayed.
If during the cooling operation for the automatic refrigerant charging
the ambient conditions go beyond the allowable for this operation
mode, the unit will indicate on the segment display the code
case indoor temperature is out of range or
temperature is out of range. In this case, when the additional refrig-
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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
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malfunction accordingly. Resetting the malfunction can be done by
pushing BS1. The procedure can be restarted from 6a.
Aborting the automatic refrigerant charging 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
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
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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.
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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.
E-2
E-3
, or
, the ambient conditions are
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0
)
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P9
. This indicates the
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code may not be displayed,
PE
P9
or
indication appears, close valve A and
E-3
in case the outdoor
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3P362438-5N English
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