13 Disposal
Installer reference guide
82
ERHQ+ERLQ011~016 + EHBH/X11+16CB
Daikin Altherma – Low temperature split
4P384974-1 – 2015.01
Error code
Detailed error
code
Description
AJ
03
Too long DHW heat-up time
required.
UA
17
Tank type problem
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
6 l/min
Cooling
6 l/min
08 models
Heating
6 l/min
Cooling
10 l/min
11 models
Heating
10 l/min
Cooling
15 l/min
16 models
Heating
10 l/min
Cooling
15 l/min
Minimum required flow during defrost operation
04+08 models
12 l/min
11+16 models
15 l/min
Minimum required flow during backup heater operation
All models
12 l/min
INFORMATION
Error AJ-03 is reset automatically from the moment there is
a normal tank heat-up.
13
Disposal
13.1
Overview: Disposal
Typical workflow
Disposing of the system typically consists of the following stages:
1
Pumping down the system.
2
Dismantling the system according to the applicable legislation.
3
Treating the refrigerant, oil and other parts according to the
applicable legislation.
INFORMATION
For more details, see the service manual.
13.2
About pump down
The unit is equipped with an automatic pump down function, with
which you can collect all refrigerant from the system into the outdoor
unit.
Example:
To protect the environment, pump down when relocating
the unit or when disposing of the unit.
NOTICE
The outdoor unit is equipped with a low pressure switch or
a low pressure sensor to protect the compressor by turning
it OFF. NEVER short-circuit the low pressure switch during
pump down operation.
Before pumping down
NOTICE
Before you pump down, make sure the water temperature
(example: by performing a heating operation) and water
volume (example: by opening all heat emitters) are
sufficiently high. Pump down is done in cooling mode.
13.3
To pump down
1
Turn ON the main power supply switch.
2
Make sure the liquid stop valve and the gas stop valve are
open.
3
Press the pump down button (BS4) for at least 8 seconds. BS4
is located on the PCB in the outdoor unit (see wiring diagram).
Result:
The compressor and outdoor unit fan start
automatically.
4
Once operation stops (after 3~5 minutes), close the liquid stop
valve and the gas stop valve.
Result:
The pump down operation is finished. The user
interface may display "
" and the indoor pump may continue
operating. This is NOT a malfunction. Even if you press the ON
button on the user interface, the unit will NOT start. To restart
the unit, turn OFF the main power supply switch and turn it ON
again.
5
Turn OFF the main power supply switch.
NOTICE
Make sure to reopen both stop valves before restarting the
unit.
