15 Electrical installation
Installation and operation manual
30
RYYQ+RYMQ+RXYQ8~20U7Y1B
VRV IV+ heat pump
4P546220-1C – 2020.10
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
problems based on error codes"
40] and solve the
malfunction accordingly. Resetting the malfunction can
be done by pushing BS1. The procedure can be
restarted from
"Step 6a: To automatically charge
▪ Aborting the automatic refrigerant charge is possible by
pushing BS1. The unit will stop and return to idle
condition.
14.4.7
Step 6b: To manually charge refrigerant
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
30] and solve the
malfunction accordingly. Resetting the malfunction can
be done by pushing BS3. The procedure can be
restarted from
▪ Aborting the manual refrigerant charge is possible by
pushing BS3. The unit will stop and return to idle
condition.
14.4.8
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.
Code
Cause
Solution
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,
"19.1 Solving problems
based on error
codes"
14.4.9
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.
14.4.10 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
Quantity of fluorinated greenhouse gases
of the total
refrigerant charge expressed as tonnes CO
2
equivalent.
f
GWP = Global warming potential
NOTICE
Applicable legislation on
fluorinated greenhouse gases
requires that the refrigerant charge of the unit is indicated
both in weight and CO
2
equivalent.
Formula to calculate the quantity in CO
2
equivalent
tonnes:
GWP value of the refrigerant × total refrigerant
charge [in kg] / 1000
Use the GWP value mentioned on the refrigerant charge
label.
2
Fix the label on the inside of the outdoor unit near the gas and
liquid stop valves.
15
Electrical installation
DANGER: RISK OF ELECTROCUTION
