Daikin Altherma 3 R F Installer's Reference Manual page 206

12 | Troubleshooting
Installer reference guide
206
Error code Detailed error code Description
AJ 03
C0 00
C0 01
C0 02
C4 00
CJ 02
EC 00
EC 04
H1 00
HC 00
HC 01
HJ 10
JA 17
U3 00
U4 00
U5 00
U8 01
U8 02
U8 03
UA 00
UA 17
UA 21
UA 22
Too long DHW heat-up time
required
Flow sensor malfunction
Flow switch malfunction
Flow switch malfunction
Heat exchanger temperature
sensor problem
Room temperature sensor
problem
Abnormal increase tank
temperature
Tank preheating
External temperature sensor
problem
Tank temperature sensor
problem
Second tank temperature
sensor problem
Water pressure sensor
abnormality
Refrigerant pressure sensor
abnormality
Underfloor heating screed
dryout function not completed
correctly
Indoor/outdoor unit
communication problem
User interface communication
problem
Connection with LAN adapter
lost
Connection with room
thermostat lost
No connection with room
thermostat
Indoor unit, outdoor unit
matching problem
Tank type problem
Extension/hydro mismatch
problem
Communication problem between
control box and option box
ERGA04~08DAV3(A) + EHVH/X04+08S18+23DA/DJ3V+6V+9W7
Daikin Altherma 3 R F
4P618947-1 – 2020.03