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Commissioning
Installer and user reference guide
154
REMA5+REYA8~20A7Y1B
VRV 5 heat recovery
4P687640-1 – 2022.07
3
To start the BS/indoor unit connection check, make field setting [2-20]=2 (see
"21.1.8 Mode 2: field settings"
135]). The unit will start the check operation.
Result:
The check operation is automatically carried out, the outdoor unit display
will indicate "
" and the indication "Centralised control" and "Test run" will
display on the indoor unit user interface(s).
Steps during the automatic connection check procedure:
Step
Description
Check ON
Precooling and preheating operations
Control before start-up (pressure equalisation)
Four way valve initial control
Heating start up
Misconnection assessment operation
Pumpdown
Restart standby
Stop
INFORMATION
During the check 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.
During the check, if the following codes are on 7-segment display, the check will
not continue, take actions for correcting.
Code
Description
Indoor unit is out of temperature range 20~27°C for leak
detection operation.
Outdoor unit is out of temperature range –5~43°C for
leak detection operation.
Too low pressure was noticed during leak detection
operation. Restart BS/indoor unit connection check.
Indicates an indoor unit is not compatible with this
function.
4
Check the results on the outdoor unit 7‑segment display.
Completion
Description
Normal completion
"
" on the 7‑segment display.
Abnormal completion
Indication of malfunction code on the 7‑segment display.
Refer to
"22.7 Correcting after abnormal completion of
153] to take actions for correcting the
abnormality. When the check is fully completed, normal
operation will be possible after 5 minutes.
