Page 18
Page 19
BASIC TROUBLE SHOOTING
Symptoms
Possible Cause
Remedy
No lights on
front of unit
On / Off switch in Off position
Thermal cut-out tripped
Switch to On position
Reset and check for faults
(i.e. scale on thermistor
No boiling water
available
Normal level sensor
holding a signal
Thermal cut-out
tripped (no lights on fascia)
On / Off switch in Off position
Element failed
De-scale
Reset and check for faults
(i.e. scale on thermistor)
Switch to On position
Replace element
Thermal cut-out
trips regularly
Excessive internal scale. (See
‘De-Scale’ )
Faulty wiring to thermistors /
faulty thermistors
Temperature controller needs
adjusting
Element failed to earth
Defective Main Printed Circuit
Board & / or Triac PCB
De-scale the boiler
(Particularly thermistor)
Repair / replace as required
Lower operating temperature
Replace element
Replace Circuit Board & Triac
(sold as a matched pair)
Overflows
Dirt in solenoid valve.
Level sensors require de-
scaling or replacing
Main Printed Circuit
Board faulty
Clean solenoid filter / or replace
solenoid, “work the boiler” -
see Service Instructions
De-scale / replace sensors
Replace Main Printed Circuit
Board
Wi
rin
g
S
c
he
m
at
ic f
or
Ca
lom
a
x Q
uas
ar
2
W
at
er
B
o
ile
r
RE
D
YEL
L
O
W
BL
AC
K
BL
U
E
PI
N
K
BR
O
WN
OR
A
NG
E
WH
ITE
+1
2
Vd
c
(
B
RO
W
N)
BL
AC
K
RE
D
0.
75
mm
Y
E
LL
OW
0.
75
W
H
IT
E
O
R
0
.5m
m
Y
E
LL
OW
BL
AC
K
BL
AC
K
RE
D
N
E
L
BLUE
BLUE
L
N
E
BLACK
YELLOW / GREEN
BL
AC
K
BL
AC
K
YEL
L
OW
/ G
R
EE
N
RED
0V
d
c (
OR
A
NG
E
)
RE
D
RED
OR
A
NG
E
YEL
L
O
W
RE
D
BL
U
E
CONNECTOR PLUG
CO
L
D W
AT
E
R I
NL
E
T
SO
L
EN
O
ID
V
AL
VE
EL
EM
EN
T
TR
IAC
PC
B
HI
G
H
NO
RM
AL
LO
W
LE
V
EL
SEN
SO
RS
HO
T
W
A
TE
R
O
U
TL
E
T
DI
S
PE
N
SE V
AL
VE
HE
A
TE
R
LE
D
SO
L
EN
O
ID
LE
D
TH
E
RM
IST
O
R
PU
SH
B
U
TTO
N
ON
FR
O
NT
PAN
EL
TH
E
RM
A
L
CUT
O
UT
EAR
T
H
ON
BO
D
Y
EAR
T
H
ON
BA
S
E
OR
A
NG
E
BR
O
WN
OP
T
1
U1
OP
1
EAR
T
H O
N
CA
S
IN
G
SI
N
GL
E
P
O
LE
IS
O
LA
T
IN
G
SW
ITC
H
