Tap Water Related - Daikin Altherma EBLQ011CAV3 Service Manual

1 Troubleshooting
Incorrect water pump operation
Root cause category: software control
Possible failure
Unexpected water pump
behaviour.
Root cause category: parameter (setting)
Possible failure
Incorrect setting of pump operation
mode (continuous, sample,
request) (setting [F‑0D]).
1.5.3

Tap water related

High water pressure at tapping point
Root cause category: component – mechanical
Possible failure
Safety valve water side blocked.
Field installed pressure reducing
valve problem.
Tap water has white colour
Root cause category: installation
Possible failure
Extreme formation of anode
residue.
Tap water has bad odour
Root cause category: installation
Possible failure
Water circuit - bad odour of supply
water.
Service manual
24
Root cause
Water pump software control.
Root cause
Incorrect setting.
Root cause
Component failure.
▪ Pressure reducing valve
reduce pressure of the main
water supply) NOT installed,
▪ Pressure reducing valve
problem.
Root cause
Water quality and composition of
the water (chlorides, conductivity)
can lead to accelerated reduction
of the anode in the tank and
aluminiumhydroxides will be
formed on the bottom of the tank.
(Remark: a NOT well controlled
water softener can cause an
increased amount of chlorides in
the water.)
Root cause
Bad quality/contamination of
supply water.
Check
Water pump start/stop conditions:
▪ During space heating
domestic hot water off: the
pump is off,
▪ During space heating
domestic hot water on: pump
operation depends on setting
[F‑0D] (continuous, sample or
request).
Remark: in domestic hot water
operation the pump starts later
than the compressor to avoid that
the tank is cooled down by the cold
water loop.
Check
Confirm setting [F‑0].
Check
Check safety valve.
(to Check water system pressure
before and after the water
pressure reducing valve.
Check
Visual check for
aluminiumhydroxide residue is
ONLY possible with endoscope.
Check
Check the water quality (odour/
contamination) at cold domestic
water inlet.
EBLQ+EDLQ011~016CAV3+W1 + EBLQ+EDLQ011~016CA3V3+W1
Repair
or
or
Repair
Adapt setting [F‑0] if required
(factory setting: [F‑0]=1).
Repair
If required, replace safety valve.
Install or replace water pressure
reducing valve.
Repair
▪ Drain and flush the tank to
remove
aluminiumhydroxides,
▪ Check correct setting of field
supplied water softener
installed).
Repair
Assure that quality of entering
water is OK.
+ EK(2)CB07CAV3 + EKMBUHCA3V3+9W1
Daikin Altherma – Monobloc
ESIE18-04 – 2019.02
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