Daikin REYQ144TYDN - 15.2.2. Mode 2

31 3P362438-3H English
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 lid of the
refrigerant charging port. The tightening torque for the lid 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.
• Total indoor unit capacity: ≥ 80%
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 fulll the automatic refrigerant charge: cooling or heating. If
above conditions are fullled, 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):
- 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).
• When 23 or 03 starts ashing (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: 26 will be ashing. 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
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
favorable to execute the test run.
- If 01, 02, or 03 appears, push BS1 to nish the auto-
matic charging function procedure. The ambient conditions
are favorable to execute the test run.
- If the unit indicates E-2, or E-3, the ambient conditions are
NOT favorable to execute the test run. Push BS1 to nish the
automatic charging procedure.
INFORMATION
In case a malfunction code occurred during this automatic charging
procedure, the unit will stop and indicate 26 ashing. Push BS2 to
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
code, charging is almost nished. When the unit stops operating,
close valve A immediately and check whether the segment indi-
cation/user interface of indoor unit shows P9. This indicates the
automatic charging in cooling program was nished 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 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
refrigerant charging was not nished, step 6a has to be repeated.
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40 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.
Perform the test procedure as described in 15.4.2. Test operation on
page39.
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congura-
tion into account.
• Activate outdoor unit setting [2-20]=1 to start manual refriger-
ant charge mode. Refer to page34 for details.
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.
01_EN_3P362438-3H.indb 31 1/14/2015 10:20:22 AM