Daikin VRV IV RKXYQ5T8Y1B Series Installation And Operation Manual page 26

14 Piping installation
b Nitrogen
c Weighing scales
d Refrigerant R410A tank (siphon system)
e Vacuum pump
f Liquid line stop valve (circuit 2: to indoor units)
g Gas line stop valve (circuit 2: to indoor units)
h Gas line stop valve (circuit 1: to heat exchanger unit)
i Liquid line stop valve (circuit 1: to heat exchanger unit)
A, B, C Valves A, B and C
D Refrigerant line splitter
2 Open valves C (on line of B) and B.
3 Pre‑charge refrigerant until the determined additional refrigerant
amount is reached or pre‑charging is not possible anymore, and
then close valves C and B.
4 Do one of the following:
If
The determined additional
refrigerant amount is reached
Too much refrigerant is
charged
The determined additional
refrigerant amount is not
reached yet
Stage 2: Manual charging
(= charging in the "Manual additional refrigerant charge" mode)
Summary – Manual charging:
Refrigerant bottle Connected to the service port for refrigerant
charge.
This charges to both circuits, and to the
compressor unit's internal refrigerant piping.
Stop valves Open
Compressor Operates
5 Connect as shown. Make sure valve A is closed.
p < p >
A
b
R410A
a c
a Weighing scales
b Refrigerant R410A tank (siphon system)
c Vacuum pump
d Refrigerant charge port
A Valve A
NOTICE
The refrigerant charging port is connected to the piping
inside the unit. The unit's internal piping is already factory
charged with refrigerant, so be careful when connecting
the charge hose.
6 Open all compressor unit stop valves. At this point, valve A
must remain closed!
Installation and operation manual
26
Then
Disconnect the manifold from
the liquid line(s).
You do not have to perform the
"Stage 2" instructions.
Recover refrigerant until the
determined additional
refrigerant is reached.
Disconnect the manifold from
the liquid line(s).
You do not have to perform the
"Stage 2" instructions.
Disconnect the manifold from
the liquid line(s).
Continue with the "Stage 2"
instructions.
d
RDXYQ
7 Take all the precautions mentioned in "16 Configuration" [ 4 29]
and "17 Commissioning" [ 4 36] into account.
8 Turn on the power of the indoor units, compressor unit and heat
exchanger unit.
9 Activate setting [2‑20] to start the manual additional refrigerant
charge mode. For details, see
Result: The unit will start operation.
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.
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
when charging refrigerant" [ 4 26] and solve the
malfunction accordingly. Resetting the malfunction can
be done by pushing BS3. You can restart the
"Charging" instructions.
▪ Aborting the manual refrigerant charge is possible by
pushing BS3. The unit will stop and return to idle
condition.
10 Open valve A.
11 Charge refrigerant until the remaining determined additional
refrigerant amount is added, and then close valve A.
12 Press BS3 to stop the manual additional refrigerant charge
mode.
NOTICE
Make sure to open all stop valves after (pre-) charging the
refrigerant.
Operating with the stop valves closed will damage the
compressor.
NOTICE
After adding the refrigerant, do not forget to close the lid of
the refrigerant charging port. The tightening torque for the
lid is 11.5 to 13.9 N•m.
14.4.4 Error codes when charging refrigerant
INFORMATION
If a malfunction occurs:
▪ In case of 5 HP: The error code is displayed on the
user interface of the indoor unit.
▪ In case of 8 HP: The error code is displayed on the
compressor unit's 7‑segments display and on the user
interface of the indoor unit.
If a malfunction occurs, close valve A immediately. Confirm the
malfunction code and take corresponding action,
codes" [ 4 38].
problems based on error
14.4.5 To fix the fluorinated greenhouse gases
label
1 Fill in the label as follows:
VRV IV compressor unit for indoor installation
"Mode 2: Field settings" [ 4 33].
"Error codes
"19.1 Solving
RKXYQ5T8 + RKXYQ8T7Y1B
4P499900-1A – 2020.10