Daikin Altherma EHVH04S18CB3V Installer's Reference Manual page 82

12 Troubleshooting
Error code Detailed error
code
8F 00
C0 00
U3 00
81 00
C4 00
80 00
U5 00
U4 00
AC 00
EC 00
HC 00
CJ 02
H1 00
89 02
A1 01
AH 00
Installer reference guide
82
Description
Abnormal increase 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.
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.
Error code Detailed error
code
89 03
AJ 03
UA 17
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 during heat pump operation
04 models Heating
Cooling
08 models Heating
Cooling
11 models Heating
Cooling
16 models Heating
Cooling
Minimum required flow during defrost operation
04+08 models
11+16 models
Minimum required flow during backup heater operation
All models
INFORMATION
Error AJ-03 is reset automatically from the moment there is
a normal tank heat-up.
ERLQ004~008CA + EHVH/X04+08S18+26CB
Description
Heat exchanger frozen.
Too long DHW heat-up time
required.
Tank type problem
6 l/min
6 l/min
6 l/min
10 l/min
10 l/min
15 l/min
10 l/min
15 l/min
12 l/min
15 l/min
12 l/min
Daikin Altherma – Low temperature split
4P384973-1A – 2016.02