13 Disposal
Installer reference guide
84
ERHQ+ERLQ011~016 + EHVH/X11+16S18+26CB
Daikin Altherma – Low temperature split
4P384975-1C – 2018.02
Error code
Detailed error
code
Description
U4
00
Indoor/outdoor unit
communication problem.
U5
00
User interface
communication problem.
U8
01
Connection with adapter lost
Please contact your dealer.
UA
00
Indoor unit, outdoor unit
matching problem.
Power reset 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 is lower than described in
the table below, the unit will temporarily stop operation and
the user interface will display error 7H‑01. After some time,
this error will reset automatically and the unit will resume
operation.
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
If the 7H‑01 error persists, the unit will stop operation and the user
interface will display an error code that needs to be reset manually.
Depending on the problem, this error code is different:
Error code
Detailed error
code
Description
7H
04
The water flow problems mainly
occurred during domestic hot
water operation. Check the
domestic hot water circuit.
7H
05
The water flow problems mainly
occurred during space heating
operation. Check the space
heating circuit.
7H
06
The water flow problems mainly
occurred during cooling/defrost
operation. Check the space
heating/cooling circuit.
Additionally, this error code might
be an indication of frost damage
to the plate heat exchanger. In
that case, contact your local
dealer.
INFORMATION
Error AJ-03 is reset automatically from the moment there is
a normal tank heat-up.
13
Disposal
NOTICE
Do NOT try to dismantle the system yourself: dismantling
of the system, treatment of the refrigerant, oil and other
parts MUST comply with applicable legislation. Units
MUST be treated at a specialised treatment facility for
reuse, recycling and recovery.
13.1
Overview: Disposal
Typical workflow
Disposing of the system typically consists of the following stages:
1
Pumping down the system.
2
Bringing the system to a specialized treatment facility.
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.