Installer reference guide
57
EHVH/X16
Daikin Altherma - Low Temperature Split
4P313777-1 – 2012.05
12 Troubleshooting
Chemical disinfection
If the applicable legislation requires a chemical disinfection in specific
situations, involving the domestic hot water tank, please be aware
that the domestic hot water tank is a stainless steel cylinder
containing an aluminium anode. We recommend to use a non-
chloride based disinfectant approved for use with water intended for
human consumption.
Anode
No maintenance or replacement required.
11.3.1 To drain the domestic hot water tank
1
Switch OFF the power supply.
2
Turn OFF the cold water supply.
3
Open the hot water taps.
4
Open the drain valve.
12
Troubleshooting
12.1
Overview: Troubleshooting
12.2
General guidelines
Before starting the troubleshooting procedure, carry out a thorough
visual inspection of the unit and look for obvious defects such as
loose connections or defective wiring.
12.3
Solving problems based on symptoms
12.3.1 Symptom: The unit is NOT heating or
cooling as expected
NOTICE
When using means for descaling or chemical disinfection, it
must be ensured that the water quality remains compliant
with EU directive 98/83 EC.
WARNING
Q
When carrying out an inspection on the switch box of
the unit, always make sure that the unit is
disconnected from the mains. Turn off the respective
circuit breaker.
Q
When a safety device was activated, stop the unit and
find out why the safety device was activated before
resetting it. NEVER bridge safety devices or change
their values to a value other than the factory default
setting. If you are unable to find the cause of the
problem, call your dealer.
DANGER: RISK OF ELECTROCUTION
WARNING
Prevent hazard due to the inadvertent resetting of the
thermal cut-out: this appliance must NOT be supplied
through an external switching device, such as a timer, or
connected to a circuit that is regularly turned ON and OFF
by the utility.
DANGER: RISK OF BURNING
Possible causes
Corrective action
The temperature setting is NOT
correct
Check the temperature setting on
the remote controller. Refer to
the operation manual.
The water flow is too low
Check and make sure that:
Q
All shut-off valves of the
water circuit are completely
open.
Q
The water filter is clean.
Clean if necessary.
Q
There is no air in the
system. Purge air if
necessary. You can purge
air manually (see "9.3.1 To
perform a manual air
purge" on page 53) or use
the automatic air purge
function (see "9.3.2 To
perform an automatic air
purge" on page 54).
Q
The water pressure is >1
bar.
Q
The expansion vessel is
NOT broken.
Q
The resistance in the water
circuit is NOT too high for
the pump (see "14.8 ESP
curve" on page 78).
If the problem persists after you
have conducted all of the above
checks, contact your dealer. In
some cases, it is normal that the
unit decides to use a low water
flow.
The water volume in the
installation is too low
Make sure that the water volume
in the installation is above the
minimum required value (see "To
check the water volume" on
page 20).
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