Correcting After Abnormal Completion Of The Test Run; Operating The Unit; Maintenance And Service; Overview: Maintenance And Service - Daikin VRV W T-Series Installation Manual

4 Make sure the default (idle) situation is existing; see "7.2.4 To
access mode 1 or 2" on page 35. Push BS2 for 5 seconds or
more. The unit will start test operation.
Result: The test operation is automatically carried out, the
outside unit display will indicate "
operation" and "central control" will display on the user interface
of indoor units.
Steps during the automatic system test run procedure:
Step
Control before start up (pressure equalization)
Cooling start up control
Cooling stable condition
Communication check, gas stop valve check
Liquid stop valve check
Pipe length check
Discharge gas stop valve check
Pump down operation
Unit stop
Note: During the test operation, it is not possible to stop the unit
operation from a user interface. To abort the operation, press BS3.
The unit will stop after ±30 seconds.
5 Check the test operation results on the outside unit 7-segment
display.
Completion
Normal completion No indication on the 7-segment display (idle).
Abnormal Indication of malfunction code on the
completion 7-segment display.
Refer to "8.6 Correcting after abnormal
completion of the test run" on page 43 to take
actions for correcting the abnormality. When
the test operation is fully completed, normal
operation will be possible after 5 minutes.
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 outside 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 outside 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.
RWEQ96~432TAYCU
VRV W T-Series water-cooled system air conditioner
4P540122-1B – 2018.11
" and the indication "test
Description
Description

9 Maintenance and service

9 Maintenance and service
NOTE
Maintenance must be done by an authorized installer or
service agent.
We recommend to do maintenance at least once a year.
However, applicable legislation might require shorter
maintenance intervals.
9 .1 Overview: Maintenance and
service
This chapter contains information about:
▪ Preventing electrical hazards when maintaining and servicing the
system
▪ Cleaning the plate heat exchanger
▪ The refrigerant recovery operation
9 .2

Maintenance safety precautions

DANGER: RISK OF ELECTROCUTION
DANGER: RISK OF BURNING
NOTE: 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 the power supply is turned off.
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.
575V
3 3
N31
BLK
N32 BLK
–
2
+
–
1 . Terminal block for power supply
2 . Tester
3 . Faston tab
3 To prevent damaging the PCB, touch a non-coated metal part
to eliminate static electricity before pulling out or plugging in
connectors.
RWEQ*TAYCU type
+
1
Installation manual
43