42
PROBLEM
CAUSE
N
o
li
g
h
t
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c
o
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tr
o
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p
a
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l
K
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y
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d
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w
o
rk
The
re
is
a
b
u
rn
ing
s
mel
l
Hea
ti
n
g
t
e
m
p
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ra
tu
re
is i
n
su
ff
ici
e
n
t
B
o
ile
r
d
o
e
s
n
o
t
h
e
a
t
W
a
te
r
lea
k
in
th
e
c
o
n
n
e
c
tion
s
Fr
e
q
u
e
n
tly
d
im
ini
s
h
ing
w
a
te
r
S
a
fe
ty
v
a
lv
e
lea
k
ing
w
a
te
r
SOLUTIONS
➢
No electricity
➢
Residual current relay
or fuse is shut
➢
Connection problem
concerning the control
board and power board
➢
Display card failure
●
●
➢
Check if there is
electricity
➢
Check the device’s
residual current relay
and fuse
➢
Call the authorized
service
➢
Connections not
made properly
➢
Sealing gasket defective
●
➢
Have the
connections made
again
➢
Renew sealing gaskets
➢
Keypad malfunction
➢
Electronic board failure
●
➢
Call the authorized
service
➢
Unsuitable cable use
➢
Loose connection
●
➢
Turn off the device and
call the authorized
service
➢
High pressure
●
➢
Drain excess water
from the drain valve
➢
The device is set to
central heating
operation mode
➢
Flow sensor malfunction
●
➢
Check device settings
➢
Call the authorized
service
➢
Resistance fault
➢
Limit thermostat cut off the
current
➢
Triac failure
➢
Control board failure
●
●
➢
Call the authorized
service
➢
Insufficient water pressure
●
➢
Check the water
pressure
➢
There is a water leak
in the plumbing pipes
●
➢
Fix the water leak in
the heating system.