8 Troubleshooting
Installation and operation manual
38
SERHQ020~0 SEHVX20~64BAW
Split packaged air-cooled water chiller
4P508019-2B – 2018.01
7.6
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 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
Troubleshooting
8.1
Error codes: Overview
Main code
Cause
Solution
Failure writing memory (EEPROM error)
Contact your local dealer.
Water circuit malfunction
▪ Check that water flow is possible (open all valves in the
circuit).
▪ Force clean water through the unit.
R410A expansion valve error (K11E/K12E)
▪ Check wiring connections.
▪ Contact your local dealer.
Water system warning
▪ Check filter.
▪ Make sure all valves are open.
▪ Contact your local dealer.
Capacity error
Contact your local dealer.
Bad ACS communication
Contact your local dealer.
R410A liquid thermistor error (R13T/R23T)
▪ Check wiring connections.
▪ Contact your local dealer.
Returning water thermistor error (R12T/R22T)
▪ Check wiring connections.
▪ Contact your local dealer.
Heating leaving water thermistor error (R11T/R12T)
▪ Check wiring connections.
▪ Contact your local dealer.
User interface thermostat thermistor error
Contact your local dealer.
High pressure error (SENPH/S1PH)
▪ Check that the circuit does not contain any air.
▪ Check that water flow is possible (open all valves in the
circuit).
▪ Check that the water filter is not blocked.
▪ Check that all refrigerant stop valves are open.
▪ Contact your local dealer.
Low pressure error (SENPL)
Contact your local dealer.
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