Page 18
Page 19
TROUBLE SHOOTING
Symptoms
Possible Cause
Remedy
No water
available
Broken tap top
Faulty float valve. (See
‘water fill function’ page 15)
Replace tap top (or component)
Replace valve
Continually
boils
Excessive internal scale. (See
‘De-Scale’ page 14)
Faulty wiring to thermistors /
faulty thermistors
Temperature controller needs
adjusting (Note: the rod
thermostat does not control
temperature)
Defective Printed Circuit Board
De-scale the boiler
(Particularly thermistor’s)
Repair / replace as required
Lower operating temperature
Replace Circuit Board
Overflows
Dirt in float valve. (See ‘water
fill function’ page 15)
Incorrect or no Restrictor fitted
Water in float
Clean diaphragm
Fit low pressure or high
pressure restrictor
Replace float
Both wait and
ready lights
illuminated
Boiler in ‘lockout’ condition.
(See ‘heater function’ page14)
Re-seat the safety cut-out
plug to circuit board
Check safety cut-out
set to 120 degrees
Ensure water available at tap
Power down machine for 20
seconds and switch on. If symptoms
persist replace safety cut-out.
Wiring Schematic for Calomax
CB32/22/12 Water Boilers
TOP THERMISTOR
BOTTOM THERMISTOR
SAFETY CUTOUT
EARTHING POINT
ON CONTROL PANEL
ELEMENT
LIGHT UNIT
(RED TO TOP)
ECONOMY
SWITCH
Connections to any
Normally CLOSED
contacts. Wires not
fitted on CB12
BLUE
BLUE
WHITE
WHITE
BLUE
BLUE
RED
BLACK
BROWN
BLUE
GREEN / YELLOW
ORANGE
PINK
BROWN
W
H
IT
E
W
H
IT
E
G
R
EE
N
/
YE
LL
O
W
LIVE
NEUTRAL
EARTH
RCD
INCOMING SINGLE PHASE SUPPLY
THROUGH DP ISOLATING SWITCH,
FUSE AND (RECOMMENDED) RCD
(NOT SUPPLIED WITH APPLIANCE)
CONNECTOR
BLOCK
(SUPPLIED)
