19
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Commissioning
Installer and user reference guide
118
R R8T7V1B
VRV IV heat pump for indoor installation
4P499898-1B – 2021.12
3
Make sure the default (idle) situation is existing; see
102]. Push BS2 for 5 seconds or more. The unit will start test
operation.
Result:
The test operation is automatically carried out, the compressor 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 compressor unit 7‑segment display.
Completion
Description
Normal
completion
No indication on the 7‑segment display (idle).
Abnormal
completion
Indication of malfunction code on the 7‑segment display.
Refer to
"19.3.4 Correcting after abnormal completion of
118] to take actions for correcting the
abnormality. When the test operation is fully completed,
normal operation will be possible after 5 minutes.
19.3.4 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:
▪
In case of 5 HP: The error code is displayed on the user interface of the indoor
unit.
▪
In case of 8 HP: The error code is displayed on the compressor unit's 7‑segments
display and on the user interface of the indoor unit.
