Solving Problems Based On Error Codes; Error Codes: Overview - Daikin Altherma EHVH/X11+16S18CB Installer's Reference Manual

Possible causes
The disinfection operation was
stopped manually: with the user
interface displaying the DHW
home page and its user
permission level set to Installer,
the button was pressed
during disinfection operation.
12.4 Solving problems based on error
codes
When a problem happens, an error code appears on the user
interface. It is important to understand the problem and to take
measures before resetting an error code. This should be done by a
licensed installer or by your local dealer.
This chapter gives you an overview of all error codes and the
content of the error code as it appears on the user interface.
For a more detailed troubleshooting guideline for each error, please
see the service manual.
12.4.1

Error codes: Overview

Error codes of the indoor unit
Error code Detailed error
code
7H 01
7H 04
7H 05
7H 06
80 00
81 00
89 01
89 02
89 03
ERHQ+ERLQ011~016 + EHVH/X11+16S18+26CB
Daikin Altherma – Low temperature split
4P384975-1C – 2018.02
Corrective action
Do NOT press the button
while the disinfection function is
active.
Description
Water flow problem.
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/cooling
circuit.
Water flow problem during
cooling/defrost.
Manual reset.
Check the plate heat exchanger.
Returning water temperature
sensor problem.
Please contact your dealer.
Leaving water temperature
sensor problem.
Please contact your dealer.
Heat exchanger frozen.
Heat exchanger frozen.
Heat exchanger frozen.
Error code Detailed error
code
8F 00
8H 00
8H 03
A1 00
A1 01
AA 01
AC 00
AH 00
AJ 03
C0 00
C4 00
CJ 02
EC 00
H1 00
HC 00
U3 00
12 Troubleshooting
Description
Abnormal increase outlet
water temperature (DHW).
Abnormal increase outlet
water temperature.
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.
Booster heater overheated.
Please contact your dealer.
Tank disinfection function not
completed correctly.
Too long DHW heat-up time
required.
Flow sensor/switch malfunction.
Please contact your dealer.
Heat exchanger temperature
sensor problem.
Please contact your dealer.
Room temperature sensor
problem.
Please contact your dealer.
Abnormal increase tank
temperature.
External temperature
sensor problem.
Please contact your dealer.
Tank temperature sensor
problem.
Please contact your dealer.
Under floor heating screed
dryout function not completed
correctly.
Installer reference guide
83