Daikin Altherma EHVZ04S18CB Installer's Reference Manual page 70

12 Troubleshooting
Error code Detailed error
code
J6 00
L3 00
L4 00
L5 00
P4 00
U0 00
U2 00
U7 00
UA 00
Error codes of the indoor unit
Error code Detailed error
code
7H 01
7H 04
7H 05
7H 06
(1)
On the home screen of your user inter interface, the following information will be displayed:
Bi-zone kit abnormality
detection
Refer to bi-zone kit manual
Installer reference guide
70
Description
OU: Malfunction of heat
exchanger thermistor.
Please contact your dealer.
OU: Electrical box temperature
rise problem.
Please contact your dealer.
OU: Malfunction of inverter
radiating fin temperature rise.
Please contact your dealer.
OU: Inverter instantaneous
overcurrent (DC).
Please contact your dealer.
OU: Malfunction of radiating
fin temperature sensor.
Please contact your dealer.
OU: Shortage of refrigerant.
Please contact your dealer.
OU: Defect of power supply
voltage.
Please contact your dealer.
OU: Transmission malfunction
between main CPU- INV CPU.
Please contact your dealer.
OU: Indoor/outdoor combination
problem.
Power reset required.
Description
Water flow problem.
Auto restart.
Water flow problem during
domestic hot water production.
Manual reset.
Check the domestic hot water
circuit.
Water flow problem during
heating/sampling.
Manual reset.
Check the space heating circuit.
Water flow problem during
defrost.
Manual reset.
Check the plate heat exchanger.
Error code Detailed error
code
80 00
81 01
81 00
89 01
89 02
89 03
8F 00
8H 00
8H 01
8H 02
8H 03
A1 00
A1 01
AA 01
AH 00
Description
Returning water temperature
sensor problem.
Please contact your dealer.
Mixed water thermistor
abnormality.
1
Auto reset.
Leaving water temperature
sensor problem.
Please contact your dealer.
Heat exchanger frozen.
Heat exchanger frozen.
Heat exchanger frozen.
Abnormal increase outlet
water temperature (DHW).
Abnormal increase outlet
water temperature.
Overheating mixed water circuit.
1
Auto reset.
Overheating mixed water circuit
(thermostat).
1
Auto reset.
Overheating water circuit
(thermostat).
Zero cross detection problem.
Power reset required.
Please contact your dealer.
EEPROM reading error.
Backup heater overheated.
Power reset required.
Please contact your dealer.
Tank disinfection function not
completed correctly.
ERLQ004~008CA + EHVZ04+08S18CB
Daikin Altherma – Low temperature split
4P401676-1D – 2018.07