Daikin Altherma ERLQ004-006-008CA Reference Manual page 68

12 Troubleshooting
Error code Detailed error
code
P4 00
U0 00
U2 00
U7 00
UA 00
Error codes of the indoor unit
Error code Detailed error
code
A1 00
AA 01
UA 00
7H 01
7H 04
7H 05
7H 06
81 01
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
68
Description
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
Zero cross detection problem.
Power reset required.
Please contact your dealer.
Backup heater overheated.
Power reset required.
Please contact your dealer.
Indoor unit, outdoor unit
matching problem.
Power reset required.
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.
Mixed water thermistor
abnormality.
1
Auto reset.
Error code Detailed error
code
89 01
8H 00
8H 01
8H 02
8F 00
C0 00
U3 00
81 00
C4 00
80 00
U5 00
U4 00
EC 00
HC 00
CJ 02
H1 00
Description
Heat exchanger frozen.
Abnormal increase outlet
water temperature.
Overheating mixed water circuit.
1
Auto reset.
Overheating mixed water circuit
(thermostat).
1
Auto reset.
Abnormal increase outlet
water temperature (DHW).
Flow sensor malfunction.
Manual reset.
Under floor heating screed
dryout function not completed
correctly.
Leaving water temperature
sensor problem.
Please contact your dealer.
Heat exchanger temperature
sensor problem.
Please contact your dealer.
Returning water temperature
sensor problem.
Please contact your dealer.
User interface
communication problem.
Indoor/outdoor unit
communication problem.
Abnormal increase tank
temperature.
Tank temperature sensor
problem.
Please contact your dealer.
Room temperature sensor
problem.
Please contact your dealer.
External temperature
sensor problem.
Please contact your dealer.
ERLQ004~008CA + EHVZ04+08S18CB
Daikin Altherma – Low temperature split
4P401676-1 – 2015.02