13 Disposal - Daikin EGSQH10S18AA9W Installer's Reference Manual

Error code Detailed error
code
C4 00
80 00
U5 00
EC 00
HC 00
CJ 02
H1 00
89 02
A1 01
AH 00
89 03
AJ 03
INFORMATION
▪ Indoor unit relates to indoor unit PCB which controls
the hydraulic part of the ground source heat pump.
▪ Outdoor unit relates to outdoor unit PCB which controls
the compressor module of the ground source heat
pump.
EGSQH10S18AA9W
Daikin Altherma ground source heat pump
4P351748-1D – 2016.02
Description
Heat exchanger temperature
sensor problem.
Please contact your dealer.
Returning water temperature
sensor problem.
Please contact your dealer.
User interface
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.
Heat exchanger frozen.
EEPROM reading error.
Tank disinfection function not
completed correctly.
Heat exchanger frozen.
Too long DHW heat-up time
required.
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 > Type > Reheat or
Reheat + sched. is selected, it is recommended to
program the start-up of 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 > Type > 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.
NOTICE
When the minimum water flow (in relation to the applicable
operation mode) is lower than described in the table below,
the unit will stop operation and the user interface will
display error 7H.
Minimum required flow
Heat pump operation 10 l/min
Backup heater 12 l/min
operation
INFORMATION
Error AJ-03 is reset automatically from the moment there is
a normal tank heat-up.
INFORMATION
In case of an E7‑62 error, brine pump operation stops due
to not enough flow in the brine circuit. If 10‑day brine pump
operation is running, it will stop running and will only
resume once the error is reset. It is only possible to reset
the error with the domestic hot water home screen or the
leaving water temperature home screen turned ON. To
reset the error, press
13 Disposal
Dismantling of the unit, and treatment of the refrigerant, oil and other
parts must comply with the applicable legislation.

13 Disposal

and confirm by pressing .
Installer reference guide
65