Daikin Altherma EHBH08DA6V7 - Error codes of the indoor unit

12 | Troubleshooting
Installer reference guide
205
ERGA04~08DAV3(A) + EHBH/X04+08DA*V7
Daikin Altherma 3 R W
4P618958-1 – 2020.03
Error code Detailed error code Description
L4 00 OU: Malfunction of inverter
radiating fin temperature
rise
L5 00 OU: Inverter instantaneous
overcurrent (DC)
P4 00 OU: Malfunction of radiating
fin temperature sensor
U0 00 OU: Shortage of refrigerant
U2 00 OU: Defect of power supply
voltage
U7 00 OU: Transmission malfunction
between main CPU- INV CPU
Error codes of the indoor unit
Error code Detailed error code Description
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
7H 07 Water flow problem. Pump
deblocking active
80 00 Returning water temperature
sensor problem
81 00 Leaving water temperature
sensor problem
89 01 Heat exchanger frozen
89 02 Heat exchanger frozen
89 03 Heat exchanger frozen
8F 00 Abnormal increase outlet
water temperature (DHW)
8H 00 Abnormal increase outlet
water temperature
8H 03 Overheating water circuit
(thermostat)
AA 01 Backup heater overheated
AA 02 External backup heater
overheated
AC 00 Booster heater overheated
AH 00 Tank disinfection function
not completed correctly