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Charging refrigerant (via the refrigerant charging port)
The remaining additional refrigerant charge can be charged by
operating the outdoor unit.
13 Connect as shown. Make sure valve A is closed.
p <
p >
A
d
b
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.
14 Open all outdoor unit stop valves. At this point, valve A must
remain closed!
15 Take all the precautions mentioned in
page 25
and
"8 Commissioning" on page 27
16 Turn on the power of the outdoor unit, but leave the external
operation switch turned off (see
wiring on the outdoor unit" on
17 Set the target evaporating temperature with setting [2‑8] (see
"7.2.8 Mode 2: Field settings" on
18 Turn on the power of the indoor units.
19 Turn on the external operation switch.
Result: The unit will start operation.
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
codes when charging refrigerant" on page 21
solve the malfunction accordingly.
▪ Aborting the manual refrigerant charge is possible by
turning OFF the external operation switch. The unit will
stop and return to idle condition.
20 Open valve A.
21 Charge refrigerant until the remaining determined additional
refrigerant amount is added (see
additional refrigerant amount" on page
valve A.
22 Check the sight glass of the outdoor unit. If the refrigerant is
NOT in sealing state, charge extra refrigerant, but do NOT
exceed 10% of the determined additional refrigerant amount
(see
"6.7.3 To determine the additional refrigerant amount" on
page 20).
b
a
O
Sealing state (= sufficient refrigerant)
X
Insufficient refrigerant
a
Sight glass
b
Full of liquid
c
A little foam in the liquid
LRMEQ3+4AY1
Air-cooled refrigeration condensing unit
4P442131-1 – 2016.03
d
"7 Configuration" on
into account.
"6.8.5 To connect the electrical
page 23).
page 27).
"6.7.5 Error
and
"6.7.3 To determine the
20), and then close
c
d
d
A lot of foam in the liquid
23 Turn off the external operation switch.
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.
NOTICE
Thread-locking fluid. Before reattaching the service port
cover, apply thread-locking fluid to the screw thread (NOT
to the cover or sealing part) . Otherwise, condensation
water might enter and freeze. Possible consequence:
Deformation,
refrigerant
malfunction.
a
b
c
a
Cover (do NOT apply thread-locking fluid)
b
Sealing part (do NOT apply thread-locking fluid)
c
Screw thread with thread-locking fluid
6.7.5
Error codes when charging refrigerant
INFORMATION
If a malfunction occurs, a signal (220-240 V AC) is given to
the error output (X2M/E1/E2), and the H2P LED on the
main PCB is lit.
If a malfunction occurs, close valve A immediately. Confirm the
malfunction code and take corresponding action,
problems based on error codes" on
6.7.6
To fix the fluorinated greenhouse gases
label
1 Fill in the label as follows:
Contains fluorinated greenhouse gases
RXXX
1
=
f
GWP: XXX
2
=
2
1
1
+
2
=
GWP × kg
=
1000
a
If a multilingual fluorinated greenhouse gases label is
delivered with the unit (see accessories), peel off the
applicable language and stick it on top of a.
b
Factory refrigerant charge: see unit name plate
c
Additional refrigerant amount charged
d
Total refrigerant charge
e
Greenhouse gas emissions of the total refrigerant charge
expressed as tonnes CO
f
GWP = Global warming potential
6 Installation
leakage
and
compressor
"11.3 Solving
page 30.
a
kg
b
kg
c
kg
d
e
tCO
eq
2
-equivalent
2
Installer and user reference guide
21
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Troubleshooting
