15 | Troubleshooting
Installer reference guide
225
EVLQ05+08CA + EHYHBH05A + EHYHBH/X08A + EHYKOMB33AA
Daikin Altherma hybrid heat pump
4P355634-1G – 2022.09
Error code Detailed error code Description
A1 00 Zero cross detection problem.
Power reset required.
Please contact your dealer.
A1 01 EEPROM reading error.
AA 01 Backup heater overheated.
Power reset required.
Please contact your dealer.
AH 00 Tank disinfection function
not
completed correctly.
AJ 03 Too long DHW heat-up time
required.
C0 00 Flow sensor/switch
malfunction.
Please contact your dealer.
C4 00 Heat exchanger temperature
sensor problem.
Please contact your dealer.
CJ 02 Room temperature sensor
problem.
Please contact your dealer.
EC 00 Abnormal increase tank
temperature.
EC 04 Tank preheating
H1 00 External temperature
sensor problem.
Please contact your dealer.
HC 00 Tank temperature sensor
problem.
Please contact your dealer.
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