Daikin EHFZ03S18DJ3V Installer's Reference Manual page 188

14 | Troubleshooting
Installer reference guide
188
Error code Detailed error code Description
U4 00
U5 00
U8 01
U8 02
U8 03
UA 00
UA 16
UA 21
UA 22
INFORMATION
Error AJ-03 is reset automatically from the moment there is a normal tank heat-up.
INFORMATION
If the unit detects flow when the pump is not running, an external device might be
causing flow, or there might be something wrong with the flow measuring devices
(flow sensor and flow switch).
▪
If the flow sensor detects flow when the pump is not running, the unit will stop
operation and the user interface will display error C0‑00. For the unit to resume
operation, this error needs to be reset manually.
▪
If the flow switch detects flow when the pump is not running, the unit will
temporarily stop operation and the user interface will display error C0‑01. After
some time, the error will reset automatically and the unit will resume operation.
If the problem persists, the unit will stop operation and the user interface will
display error C0‑02. For the unit to resume operation, this error needs to be reset
manually.
Indoor/outdoor unit
communication problem.
User interface
communication problem.
Connection with adapter lost
Please contact your dealer.
Connection with room thermostat lost.
No connection with room thermostat.
Indoor unit, outdoor unit
matching problem.
Power reset required.
Extension/hydro
communication problem.
Extension/hydro mismatch problem.
Extension/hydro mismatch problem.
ERLA03DAV3 + EHFZ03S18DJ3V
Daikin Altherma 3 R F
4P596821-1B – 2021.10