Ariston Thermo 470 VERT, Instruction For Installation And Maintenance, Page: 64 / 88

EN
64
PROBLEM COLD
W
ATER
W
ATER
IS
T
O
O
HO
T
INSUFFICIENT
FL
O
W
RA
TE
CONTINUOUS
DRAINA
GE
FR
OM
THE
SAFE
TY
ASSEMBL
Y
PR
O
TEC
TION
ON
LIGHT
SWIT
CHED
OFF
PR
OFESSIONAL
TECH

QUIE
TIS
"P
RO
TEC
TION
ON
LIGHT
SWIT
CHED
OFF
WHEN
PR
ODUC
T IS
PO
WERED
HPC
 ZEN
”
“HEA
TING
ON
LIGHT
NO
T ILL
UMINA
TED
PR
OFESSIONAL
TECH
STEA
TITE
RANGE
”
RUST
YC
OL
OURED
W
ATER
W
ATER
HAS
AN
UNPLEASANT
ODOUR
W
ATER
LEAK
AG
E
W
ATER
HEA
TER
IS
W
ARPED
NOISE
CA
USED
BY
W
ATER
HEA
TER
POSSIBLE CAUSES COURSE OF ACTION
C
A
USES AND SOL
UTIONS
Power cut (during heating phase) Check the fuses and replace them if necessary
“Incorrect temperature adjustment
using thermostat”
Adjust the thermostat (+ to the right; - to the left)
“Thermostat overheating safety
activated (appliance overheated)”
See 1
Faulty heating elements See 2
Unsuitable day-night programming
“Where necessary, re-activate the
heating during the day”
Thermostat malfunction See 1
“Limescale build-up inside appliance
and/or safety assembly” “Remove build-up. If necessary replace
the safety assembly”
Water mains pressure
“Check the mains pressure.
If necessary, install a pressure reducer.”
Water mains fl ow rate Check the piping
Faulty baffl e or insert Contact the technical assistance centre
“Removal of build-up from the
safety assembly”
Replace the safety assembly
“PROfessional TECH circuit
malfunctioning”
See 3
“Batteries exhausted or
not charged suffi ciently”
See 4
“No mains power in the
PROfessional TECH circuit” Make sure that electronic circuit of PROfessional
TECH protection is functioning correctly
Boiler empty Fill the boiler
“Fast coupling connector
not connected”
Connect the fast coupling connector
Heating element circuit broken Check the circuit
“Condition of cables from
electronic circuit connector”
Check the cables
Heating element connector earthing Check the wiring
“Appliance capacity insuffi cient
for requirements”
Water heater corrosion
Empty the water heater and make sure there
is no internal corrosion. If present, replace the
water heater
Bacteria development
“Replace the seal (the seal must be replaced
every time the fl ange is removed!)”
Flange seal malfunction
“Replace the seal (the seal must be replaced
every time the fl ange is removed!)”
2. Problems, causes and solutions