8 Commissioning
Installer and user reference guide
46
SERHQ020~0 SEHVX20~64BAW
Split packaged air-cooled water chiller
4P508020-1A – 2018.01
▪ Piping length
This checking operation takes ±30 minutes to complete.
Check operation procedure
1
Close the electrical component box lid and all front panels
except the one on the side of the electrical component box.
2
Turn on the power to the outdoor unit and all connected indoor
units. Be sure to turn the power ON at least 6 hours before
operation in order to have power running to the crankcase
heater.
3
Press BS1 on the outdoor unit PCB for 5 seconds. The H1P
LED lights up.
4
Press BS2 until the H6P and H7P LEDs light up.
Result:
The system operates for ±30 minutes, after which the
check operation automatically stops.
5
If no malfunction code is displayed on the user interface after
the system has stopped, check if the operation is completed.
Normal operation will be possible after 5 minutes.
6
If an error code is displayed on the user interface, refer to
"8.7 Correcting after abnormal completion of the test run" on
page 46
8.6.3
Refrigerant added using manual charging
(heating mode, pre-charging)
The test run will first run the following checks:
▪ Are the stop valves open?
▪ Is the wiring correct?
▪ Was too much refrigerant charged?
▪ Piping length
This checking operation takes ±40 minutes to complete. Perform the
test run procedure.
Test run procedure
1
Close all front panels except the one on the side of the
electrical component box.
2
Turn on the power to the outdoor unit and all connected indoor
units. Be sure to turn the power ON at least 6 hours before
operation in order to have power running to the crankcase
heater.
3
Press BS1 on the outdoor unit PCB once. The H1P LED will be
off.
4
Press BS4 for at least 5 seconds.
Result:
The test run is automatically carried out in cooling
mode, the H2P LED will light up, and the messages "Test
operation" and "Under centralized control" will be displayed on
the user interface. It may take 10 minutes to bring the
refrigerant in a uniform 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
LED display may change, but these are not malfunctions. It is
not possible to stop operation using a user interface during the
test operation. To abort the operation, press BS3, and the unit
will stop after ±30 seconds.
5
Close the front panel in order not to let it be the cause of
misjudgement.
6
If the test operation has completed successfully (only H3P LED
lit), normal operation will be possible after 5 minutes. Otherwise,
refer to
"8.7 Correcting after abnormal completion of the test
.
8.7
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 the H2P LED is not lit.
Main code
Cause
Solution
The stop valve of the outdoor unit is left closed.
Open the stop valve on both the gas and liquid side.
Refrigerant overcharge.
Recalculate the required amount of refrigerant from the
piping length and correct the refrigerant charge level by
recovering any excessive refrigerant with a refrigerant
recovery machine.
Insufficient refrigerant.
Check if the additional refrigerant charge has been finished
correctly. Recalculate the required amount of refrigerant
from the piping length and add an adequate amount of
refrigerant.
Reversed power supply phase malfunction.
Correct phase order.
No power is supplied to the outdoor unit.
Check if the power wiring for the outdoor unit is connected
correctly.
The piping and wiring of the specified indoor unit are not
connected correctly to the outdoor unit.
Confirm that the piping and wiring of the specified indoor unit
are connected correctly to the outdoor unit.
After correcting the abnormality, press BS3 and reset the error code.
Carry out the test operation again and confirm that the abnormality is
properly corrected.
8.8
Checklist handover to the user
Mark the following actions when the installation is finished and the
test run is complete.
Complete the model fill-in for each unit
Ensure the user has a printed version of the installation
and operation manual.
Explain to the user what system is installed on site.
Explain to the user how to properly operate the system
and what to do in case of problems.
Show the user what has to be done in relation to
maintenance of the unit.
