Daikin Altherma EBLQ011CA3V3 - Tap Water Related

1 Troubleshooting
Service manual
24
EBLQ+EDLQ011~016CAV3+W1 + EBLQ+EDLQ011~016CA3V3+W1
+ EK(2)CB07CAV3 + EKMBUHCA3V3+9W1
Daikin Altherma – Monobloc
ESIE18-04 – 2019.02
Incorrect water pump operation
Root cause category: software control
Possible failure Root cause Check Repair
Unexpected water pump
behaviour.
Water pump software control. Water pump start/stop conditions:
▪ During space heating or
domestic hot water off: the
pump is off,
▪ During space heating or
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.
Root cause category: parameter (setting)
Possible failure Root cause Check Repair
Incorrect setting of pump operation
mode (continuous, sample,
request) (setting [F‑0D]).
Incorrect setting. Confirm setting [F‑0]. Adapt setting [F‑0] if required
(factory setting: [F‑0]=1).
1.5.3 Tap water related
High water pressure at tapping point
Root cause category: component – mechanical
Possible failure Root cause Check Repair
Safety valve water side blocked. Component failure. Check safety valve. If required, replace safety valve.
Field installed pressure reducing
valve problem.
▪ Pressure reducing valve (to
reduce pressure of the main
water supply) NOT installed,
▪ Pressure reducing valve
problem.
Check water system pressure
before and after the water
pressure reducing valve.
Install or replace water pressure
reducing valve.
Tap water has white colour
Root cause category: installation
Possible failure Root cause Check Repair
Extreme formation of anode
residue.
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.)
Visual check for
aluminiumhydroxide residue is
ONLY possible with endoscope.
▪ Drain and flush the tank to
remove the
aluminiumhydroxides,
▪ Check correct setting of field
supplied water softener (if
installed).
Tap water has bad odour
Root cause category: installation
Possible failure Root cause Check Repair
Water circuit - bad odour of supply
water.
Bad quality/contamination of
supply water.
Check the water quality (odour/
contamination) at cold domestic
water inlet.
Assure that quality of entering
water is OK.