Error Codes: Overview; Disposal; Error Codes Of The Indoor Unit; To Pump Down - Daikin Altherma Installer's Reference Manual

13 Disposal

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
A1 00
AA 01
UA 00
7H 01
89 01
8H 00
8F 00
C0 00
U3 00
81 00
C4 00
80 00
U5 00
U4 00
AC 00
EC 00
Installer reference guide
74
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.
Heat exchanger frozen.
Abnormal increase BUH
outlet water temperature.
Abnormal increase BUH
outlet water temperature (DHW).
Flow sensor/switch malfunction.
Please contact your dealer.
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.
Booster heater overheated.
Please contact your dealer.
Abnormal increase tank
temperature.
Error code Detailed error
code
HC 00
CJ 02
H1 00
AA 02
HJ 08
HJ 09
HJ 10
89 02
A1 00
AH 00
89 03
INFORMATION
In case of error code AH and no interruption of the
disinfection function occurred due to domestic hot water
tapping, following actions are recommended:
▪ When the Domestic hot water > Setpoint mode >
Reheat or Reheat + sched. is selected, it is
recommended to program the start-up the disinfection
function at least 4 hours later than the last expected
large hot water tapping. This start-up can be set by
installer settings (disinfection function).
▪ When the Domestic hot water > Setpoint mode >
Scheduled only is selected, it is recommended to
program a Storage eco 3 hours before the scheduled
start-up of the disinfection function to preheat the tank.
13 Disposal
13.1

To pump down

In order to protect the environment, be sure to pump down in
following cases:
Description
Tank temperature sensor
problem.
Please contact your dealer.
Room temperature sensor
problem.
Please contact your dealer.
External temperature
sensor problem.
Please contact your dealer.
External backup heater
overheated.
Please contact your dealer.
Water circuit pressure
is too high.
Water circuit pressure is
too low.
Water pressure sensor problem.
Please contact your dealer.
Heat exchanger frozen.
EEPROM reading error.
Tank disinfection function not
completed correctly.
Heat exchanger frozen.
ERLQ004~008CAV3 + EHBH/X04+08CA
Daikin Altherma - Low Temperature Split
4P313774-1C – 2012.11