6 Installation
Installer and user reference guide
33
RYYQ+RYMQ+RXYQ8~20U7Y1B
VRV IV+ heat pump
4P546228-1 – 2018.09
6.7.8
Error codes when charging refrigerant
Code
Cause
Solution
Unusual low pressure on
suction line
Close valve A
immediately. Push BS3 to
reset. Check following
items before retrying
autocharge procedure:
▪ Check if the gas side
stop valve is opened
correctly.
▪ Check if the valve of the
refrigerant cylinder is
opened.
▪ Check if the air inlet and
outlet of the indoor unit
are not obstructed.
Freeze-up prevention
indoor unit
Close valve A
immediately. Push BS3 to
reset. Retry autocharge
procedure.
Indoor unit is out of
temperature range for leak
detection operation
Retry when ambient
conditions are satisfied.
Outdoor unit is out of
temperature range for leak
detection operation
Retry when ambient
conditions are satisfied.
Indicates an indoor unit
which is not compatible
with leak detection
functionality is installed
(e.g., RA DX indoor unit,
Hydrobox, …)
Refer to requirements to
be able to execute leak
detection operation.
Other
malfunction
code
—
Close valve A
immediately. Confirm the
malfunction code and take
corresponding action,
"10.2 Solving problems
based on error codes" on
page 50
.
6.7.9
Checks after charging refrigerant
▪ Are all stop valves open?
▪ Is the amount of refrigerant, that has been added, recorded on the
refrigerant charge label?
NOTICE
Make sure to open all stop valves after (pre-) charging the
refrigerant.
Operating with the stop valves closed will damage the
compressor.
6.7.10
To fix the fluorinated greenhouse gases
label
1
Fill in the label as follows:
b
Contains fluorinated greenhouse gases
2
1
1
1
2
2
kg
tCO
2
eq
GWP × kg
1000
=
=
+
kg
=
kg
=
GWP: XXX
RXXX
a
f
c
d
e
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
2
equivalent
f
GWP = Global warming potential
NOTICE
In Europe, the
greenhouse gas emissions
of the total
refrigerant charge in the system (expressed as tonnes CO
2
equivalent) is used to determine the maintenance intervals.
Follow the applicable legislation.
Formula to calculate the greenhouse gas emissions:
GWP value of the refrigerant × Total refrigerant charge [in
kg] / 1000
2
Fix the label on the inside of the outdoor unit near the gas and
liquid stop valves.
6.8
Connecting the electrical wiring
6.8.1
Precautions when connecting the
electrical wiring
DANGER: RISK OF ELECTROCUTION
WARNING
All field wiring and components MUST be installed by a
licensed electrician and MUST comply with the applicable
legislation.
WARNING
If NOT factory installed, a main switch or other means for
disconnection, having a contact separation in all poles
providing full disconnection under overvoltage category III
condition, MUST be installed in the fixed wiring.
WARNING
▪ ONLY use copper wires.
▪ Make sure the field wiring complies with the applicable
legislation.
▪ All field wiring MUST be performed in accordance with
the wiring diagram supplied with the product.
▪ NEVER squeeze bundled cables and make sure they
do NOT come in contact with the piping and sharp
edges. Make sure no external pressure is applied to the
terminal connections.
▪ Make sure to install earth wiring. Do NOT earth the unit
to a utility pipe, surge absorber, or telephone earth.
Incomplete earth may cause electrical shock.
▪ Make sure to use a dedicated power circuit. NEVER
use a power supply shared by another appliance.
▪ Make sure to install the required fuses or circuit
breakers.
▪ Make sure to install an earth leakage protector. Failure
to do so may cause electric shock or fire.
▪ When installing the earth leakage protector, make sure
it is compatible with the inverter (resistant to high
frequency electric noise) to avoid unnecessary opening
of the earth leakage protector.
Install power cables at least 1 metre away from televisions or radios
to prevent interference. Depending on the radio waves, a distance of
1 metre may not be sufficient.
