Correcting After Abnormal Completion Of The Test Run; Operating The Unit; Ryyq+Rymq+Rxyq8~20U7Y1B; Vrv Iv+ Heat Pump - Daikin VRV IV+ RYYQ12U7Y1B Series Installer And User Manual

8.6 Correcting after abnormal
completion of the test run
The test operation is only completed if there is no malfunction code
displayed on the user interface or outdoor unit 7‑segment display. 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
Refer to the installation manual of the indoor unit for
detailed malfunction codes related to indoor units.
8.7

Operating the unit

Once the unit is installed and test operation of outdoor unit and
indoor units is finished, the operation of the system can start.
For operating the indoor unit, the user interface of the indoor unit
should be switched ON. Refer to the indoor unit operation manual for
more details.
9

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
In Europe, the greenhouse gas emissions of the total
refrigerant charge in the system (expressed as tonnes CO
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
9.1 Overview: Maintenance and
service
This chapter contains information about:
▪ Preventing electrical hazards when maintaining and servicing the
system
▪ The refrigerant recovery operation
9.2

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.
9.2.1

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.

RYYQ+RYMQ+RXYQ8~20U7Y1B

VRV IV+ heat pump

4P546228-1 – 2018.09
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.
8~12 HP
X3A
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 X1A, X2A 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.)
5 After the service is finished, plug the junction connector back in.
Otherwise the malfunction code
user interface or on the outdoor unit 7‑segment display and
normal operation will not be performed.
For details refer to the wiring diagram labelled on the back of the
electrical component box 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.
9.3

About service mode operation

2
Refrigerant recovery operation/vacuuming operation is possible by
applying setting [2‑21]. Refer to
page 37 for details how to set mode 2.
When vacuuming/recovery mode is used, check very carefully what
should be vacuumed/recovered before starting. See installation
manual of the indoor unit for more information about vacuuming and
recovery.
9.3.1

To use vacuum mode

1 When the unit is at standstill, set the unit in [2‑21]=1.
Result: When confirmed, the indoor and outdoor unit expansion
valves will fully open. At that moment the 7‑segment display
indication= and the user interface of all indoor units
indicate TEST (test operation) and
the operation will be prohibited.
2 Evacuate the system with a vacuum pump.
3 Press BS3 to stop vacuuming mode.
9.3.2

To recover refrigerant

This should be done by a refrigerant reclaimer. Follow the same
procedure as for vacuuming method.
9 Maintenance and service
14~20 HP
X6A (A6P)
will be displayed on the
"7.2 Making field settings" on
(external control) and
Installer and user reference guide
RED
BLK
X5A (A3P)
49