Fault Codes; Emergency Operation - Daikin EHSX04P30A Operating Instructions Manual

Malfunction
Expansion tank is defective.
Safety pressure relief
Water pressure in the heating system is too
valve is leaking or always
high.
open.
Safety pressure relief valve is stuck.
Tab. 8-1 Possible malfunctions of the Altherma EHS(X/H)

8.3 Fault codes

Code Malfunction /
Error message
Display Internal
Pressure loss
W8006 —
warning
Water pressure in
W8007 — the heating system
too high
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).
When the valve drive is removed, the AB-B path is
opened.
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).
Daikin Altherma EHS(X/H)
Daikin Altherma integrated solar unit
008.1420944 – 05/2014
8
Possible cause
Component/Designation
Warning message: Maximum permissible pressure drop
exceeded.
Too little water in the heating system.
● Check heating system for leakage, refill water.
Warning message: Water pressure has exceeded the maximum
Pressure sensor DS permissible value.
– Drain water (see chapter 7.5).
x Errors, malfunctions and messages
Possible solution
● Have the expansion tank checked by a Daikin
specialist heating technician.
● 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.
● Have the heating system checked by a Daikin heating
technician.
Causes and possible error correction

If the cause was corrected, the heating system works nor-
mally again.

If the cause was not corrected, contact your Daikin heating
technician.
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.
)
Operating instructions
49