8 Commissioning
Installer and user reference guide
40
RXYSQ8~12TMY1B
VRV IV-S system air conditioner
4P404225-1B – 2016.03
8.4
Checklist during commissioning
To perform a
test run
.
8.4.1
About test run
The procedure below describes the test operation of the complete
system. This operation checks and judges following items:
▪ Check of wrong wiring (communication check with indoor units).
▪ Check of the stop valves opening.
▪ Judgement of piping length.
Make sure to carry out the system test operation after the first
installation. Otherwise, the malfunction code
will be displayed on
the user interface and normal operation or individual indoor unit test
run cannot be carried out.
Abnormalities on indoor units cannot be checked for each unit
separately. After the test operation is finished, check the indoor units
one by one by performing a normal operation using the user
interface. Refer to the indoor unit installation manual for more details
concerning the individual test run.
INFORMATION
▪ It may take 10 minutes to achieve a uniform refrigerant
state before the compressor starts.
▪ During the test operation, the refrigerant running sound
or the magnetic sound of a solenoid valve may become
loud and the display indication may change. These are
not malfunctions.
8.4.2
To perform a test run (7-LEDs display)
Use this procedure in case of RXYSQ8.
1
Make sure all field settings you want are set; see
2
Turn ON the power to the outdoor unit and the connected
indoor units.
NOTICE
Be sure to turn on the power 6 hours before operation in
order to have power running to the crankcase heater and
to protect the compressor.
3
Make sure the default (idle) situation is existing (H1P is OFF);
see
"7.2.4 To access mode 1 or 2" on page 30
. Push BS4 for 5
seconds or more. The unit will start test operation.
Result:
The test operation is automatically carried out, the
outdoor unit H2P flashes and the indication "Test operation"
and "Under centralised control" will display on the user interface
of indoor units.
Steps during the automatic system test run procedure:
Step
Description
Control before start up (pressure
equalisation)
Cooling start up control
Cooling stable condition
Communication check
Stop valve check
Pipe length check
Pump down operation
Unit stop
INFORMATION
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.
4
Check the test operation results on the outdoor unit 7‑LEDs
display.
Completion
Description
Normal
completion
Abnormal
completion
Refer to
"8.4.4 Correcting after abnormal
completion of the test run" on page 41
actions for correcting the abnormality. When
the test operation is fully completed, normal
operation will be possible after 5 minutes.
8.4.3
To perform a test run (7-segments
display)
Use this procedure in case of 12.
1
Make sure all field settings you want are set; see
2
Turn ON the power to the outdoor unit and the connected
indoor units.
NOTICE
Be sure to turn on the power 6 hours before operation in
order to have power running to the crankcase heater and
to protect the compressor.
3
Make sure the default (idle) situation is existing; see
access mode 1 or 2" on page 30
. Push BS2 for 5 seconds or
more. The unit will start test operation.
Result:
The test operation is automatically carried out, the
outdoor unit display will indicate "
" and the indication "Test
operation" and "Under centralised control" will display on the
user interface of indoor units.
Steps during the automatic system test run procedure:
Step
Description
Control before start up (pressure equalisation)
Cooling start up control
Cooling stable condition
Communication check
Stop valve check
Pipe length check
Pump down operation
Unit stop
INFORMATION
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.
4
Check the test operation results on the outdoor unit 7‑segment
display.
Completion
Description
Normal
completion
No indication on the 7‑segment display (idle).
