9 Hand-over to the user
Installer and user reference guide
36
RXYSCQ4~6TMV1B
VRV IV-S system air conditioner
4P404224-1C – 2019.07
4
Check the test operation results on the outdoor unit 7‑LEDs
display.
Completion
Description
Normal
completion
Abnormal
completion
Refer to
"8.4.3 Correcting after abnormal
completion of the test run" on page 36
to take
actions for correcting the abnormality. When
the test operation is fully completed, normal
operation will be possible after 5 minutes.
8.4.3
Correcting after abnormal completion of
the test run
The test operation is only completed if there is no malfunction code
displayed. In case of a displayed malfunction code, perform
correcting actions as explained in the malfunction code table. Carry
out the test operation again and confirm that the abnormality is
properly corrected.
INFORMATION
If a malfunction occurs, the error code is displayed on the
user interface of the indoor unit.
INFORMATION
Refer to the installation manual of the indoor unit for
detailed malfunction codes related to indoor units.
9
Hand-over to the user
Once the test run is finished and the unit operates properly, please
make sure the following is clear for the user:
▪ Make sure that the user has the printed documentation and ask
him/her to keep it for future reference. Inform the user that he can
find the complete documentation at the URL mentioned earlier in
this manual.
▪ Explain the user how to properly operate the system and what to
do in case of problems.
▪ Show the user what to do for the maintenance of the unit.
10
Maintenance and service
NOTICE
Maintenance MUST be done by an authorized installer or
service agent.
We recommend performing maintenance at least once a
year. However, applicable legislation might require shorter
maintenance intervals.
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
10.1
Overview: Maintenance and
service
This chapter contains information about:
▪ Preventing electrical hazards when maintaining and servicing the
system
▪ The refrigerant recovery operation
10.2
Maintenance safety precautions
DANGER: RISK OF ELECTROCUTION
DANGER: RISK OF BURNING
NOTICE: Risk of electrostatic discharge
Before performing any maintenance or service work, touch
a metal part of the unit in order to eliminate static electricity
and to protect the PCB.
10.2.1
To prevent electrical hazards
When performing service to inverter equipment:
1
Do NOT open the electrical component box cover for
10 minutes after turning off the power supply.
2
Measure the voltage between terminals on the terminal block
for power supply with a tester and confirm that the power supply
is shut off. In addition, measure points as shown in the figure,
with a tester and confirm that the voltage of the capacitor in the
main circuit is less than 50 V DC.
A1P
C–
C+
3
To prevent damaging the PCB, touch a non-coated metal part
to eliminate static electricity before pulling out or plugging in
connectors.
4
Pull out junction connectors for the fan motors in the outdoor
unit before starting service operation on the inverter equipment.
Be careful not to touch the live parts. (If a fan rotates due to
strong wind, it may store electricity in the capacitor or in the
main circuit and cause electric shock.)
Junction connector
X106A for M1F
5
After the service is finished, plug the junction connector back in.
Otherwise the malfunction code
will be displayed and
normal operation will not be performed.
For details refer to the wiring diagram labelled on the back of the
service cover.
Pay attention to the fan. It is dangerous to inspect the unit while the
fan is running. Make sure to turn off the main switch and to remove
the fuses from the control circuit located in the outdoor unit.
10.3
Checklist for yearly maintenance
of the outdoor unit
Check the following at least once a year:
▪ Heat exchanger
The heat exchanger of the outdoor unit can get blocked up due to
dust, dirt, leaves, etc. It is recommended to clean the heat
exchanger yearly. A blocked heat exchanger can lead to too low
pressure or too high pressure leading to worse performance.
