8
x
Errors, malfunctions and messages
Daikin Altherma EHS(X/H)
Daikin Altherma integrated solar unit
008.1420944 – 05/2014
Operating instructions
49
8.3 Fault codes
Tab. 8-2 Error codes on the main control unit of Altherma EHS(X/H)
8.4 Emergency operation
In the case of incorrect setting in the electronic control system,
emergency heating operation can be maintained by activating the
special "Manual Operation" function on the control unit (see
chapter 3.5.1).
If the 3-way valves are intact, the Daikin Altherma EHS(X/H)
switches to
Heating mode
. The necessary flow temperature can
be adjusted with the rotary switch:
A
storage charge
can be realised using the special "Manual Op-
eration" function,
●
Remove
the
valve drive
of the 3-way diverter valve
3UV
DHW
(see fig. 7-3). To do so, press the unlock button on the
valve drive (see fig. 7-3, item 5.2) and turn the valve drive a
1/8-turn anti-clockwise (bayonet socket).
Should the
valve drive
of the 3-way diverter valve
3UVB1
be
defective
, a
parallel operating mode
can be enforced. For this:
●
Remove valve drive
from both 3-way diverter valves
3UVB1
+ 3UV DHW
.
The flow temperature is configured for storage charging
by means of heat absorption in the heat exchanger (series
switching).
Safety pressure relief
valve is leaking or always
open.
Expansion tank is defective.
●
Have the expansion tank checked by a Daikin
specialist heating technician.
Water pressure in the heating system is too
high.
●
On the control unit (rotary switch position
"Info"
)
check that the water pressure lies beneath the stated
maximum pressure. If necessary, bleed the water until
the pressure lies in central permissible range.
Safety pressure relief valve is stuck.
●
Have the heating system checked by a Daikin heating
technician.
Tab. 8-1 Possible malfunctions of the Altherma EHS(X/H)
Code
Malfunction /
Error message
Component/Designation
Causes and possible error correction
Display Internal
W8006 —
Pressure loss
warning
Pressure sensor DS
Warning message: Maximum permissible pressure drop
exceeded.
Too little water in the heating system.
●
Check heating system for leakage, refill water.
W8007 —
Water pressure in
the heating system
too high
Warning message: Water pressure has exceeded the maximum
permissible value.
– Drain water (see chapter 7.5).
If the cause was corrected, the heating system works nor-
mally again.
If the cause was not corrected, contact your Daikin heating
technician.
Malfunction
Possible cause
Possible solution
When the valve drive is removed, the AB-B path is
opened.
In order to prevent a malfunction due to a low flow level,
when the valve drive of the 3-way diverter valve 3UVB1
has been removed, sufficient heat absorption must be
ensured in the heating system.
●
Open actuators in the heat distribution network.
●
Set flow temperature as low as possible.
