Error Codes: Overview - Daikin Altherma 3 R F Installer's Reference Manual

14 | Troubleshooting

14.4.2 Error codes: Overview

Error codes of the unit
Installer reference guide
242
Error code
7H-01 Water flow problem
7H-04 Water flow problem during domestic hot water
production
7H-05 Water flow problem during heating/sampling
7H-06 Water flow problem during cooling/defrost
80-01
Returning water temperature sensor problem
81-00 Leaving water temperature sensor problem
89-01 Heat exchanger frozen (during defrost)
89-02 Heat exchanger frozen (not during defrost)
89-03 Heat exchanger frozen (during defrost)
8F-00 Abnormal increase outlet water temperature
(DHW)
8H-00 Abnormal increase outlet water temperature
8H-01 Overheating mixed water circuit
8H-02 Overheating mixed water circuit (thermostat)
8H-03 Overheating water circuit (thermostat)
A1-00 Zero cross detection problem
A5-00 OU: High pressure peak cut / freeze protection
problem
AA-01 Backup heater overheated
AC-00 Booster heater overheated
AH-00 Tank disinfection function not completed
correctly
AJ-03 Too long DHW heat-up time required
C0-00
Flow sensor malfunction
C4-00 Heat exchanger temperature sensor problem
C5-00 Heat exchanger thermistor abnormality
CJ-02 Room temperature sensor problem
E1-00 OU: PCB defect
E2-00 Leakage current detection error
E3-00 OU: Actuation of high pressure switch (HPS)
E3-24 High pressure switch abnormality
E4-00 Abnormal suction pressure
Description
ERGA04~08EAV3(A) + EHVH04+08SU18+23EA6V
Daikin Altherma 3 R F
4P629090-1 – 2020.08