Troubleshooting; Overview: Troubleshooting; Error Codes: Overview - Daikin SERHQ020BAW1 Installer And User Reference Manual

Switch box
Carry out a thorough visual inspection of the switch box and look for
obvious defects such as loose connections or defective wiring.
10

Troubleshooting

10.1

Overview: Troubleshooting

This chapter describes what you have to do in case of problems.
10.2

Error codes: Overview

Main code
Failure writing memory (EEPROM error)
Water circuit malfunction
R410A expansion valve error (K11E/K12E)
Water system warning
Capacity error
Bad ACS communication
R410A liquid thermistor error (R13T/R23T)
Returning water thermistor error (R12T/R22T)
Heating leaving water thermistor error (R11T/R12T)
User interface thermostat thermistor error
High pressure error (SENPH/S1PH)
Low pressure error (SENPL)
R410A suction thermistor error (R14T/R24T)
Reversed power supply phase malfunction
Insufficient supply voltage
Two main user interfaces are connected (when using two
user interfaces)
Type connection problem
Address error
SERHQ020~032BAW1 + SEHVX20~64BAW
Split packaged air-cooled water chiller
4P508020-1B – 2018.04
It contains information about:
▪ Solving problems based on error codes
Cause
10 Troubleshooting
WARNING
If the internal wiring is damaged, it has to be replaced by
the manufacturer, its service agent or similarly qualified
persons.
Solution
Contact your local dealer.
▪ Check that water flow is possible (open all valves in the
circuit).
▪ Force clean water through the unit.
▪ Check wiring connections.
▪ Contact your local dealer.
▪ Check filter.
▪ Make sure all valves are open.
▪ Contact your local dealer.
Contact your local dealer.
Contact your local dealer.
▪ Check wiring connections.
▪ Contact your local dealer.
▪ Check wiring connections.
▪ Contact your local dealer.
▪ Check wiring connections.
▪ Contact your local dealer.
Contact your local dealer.
▪ 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.
Contact your local dealer.
▪ Check wiring connections.
▪ Contact your local dealer.
Correct phase order.
▪ Check wiring connections.
▪ Contact your local dealer.
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.
▪ Wait until initialization between the indoor unit and
outdoor unit is completed (wait at least 12 minutes after
power ON).
▪ Contact your local dealer.
Contact your local dealer.
Installer and user reference guide
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