8 Troubleshooting
Installation and operation manual
33
SERHQ020~0 SEHVX20~64BAW
Split packaged air-cooled water chiller
4P508019-1C – 2018.04
Main code
Cause
Solution
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.
R410A suction thermistor error (R14T/R24T)
▪ Check wiring connections.
▪ Contact your local dealer.
Reversed power supply phase malfunction
Correct phase order.
Insufficient supply voltage
▪ Check wiring connections.
▪ Contact your local dealer.
Two main user interfaces are connected (when using two
user interfaces)
Check that SS1 of one controller is set to MAIN, and the
other one to SUB. Turn the power supply off, and then back
on.
Type connection problem
▪ Wait until initialization between the indoor unit and
outdoor unit is completed (wait at least 12 minutes after
power ON).
▪ Contact your local dealer.
Address error
Contact your local dealer.
Summary of Contents for SEHVX20BAW
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