Technical data

1166..00 FFAAUULLTT FFIINNDDIINNGG
© Dimple
x Boiler
s 2008
4411
DDEESSCCRRIIPPTTIIOONN OOFF CCAAUUSSEESS
Overheated appliance – Water temperature greater than 105°C.
This causes a Non volatile lockout requiring a manual reset.
No Flame –No flame signal on ignition.
The boiler makes up to 5 ignition attempts on loss of flame signal.
Failure after 5 attempts causes a Non volatile lockout requiring a
manual reset.
No Flame –Loss of flame signal during normal operation
Up to 5 loss of flame during normal operation is allowed before Non
volatile lock out occurs requiring manual reset.
The loss of flame count is reset when the boiler thermostat is
satisfied
Temporarily overheated appliance – Water temperature is greater
than 95°C
This causes a volatile lockout that will automatically reset when the
temperature drops below the boiler thermostat setting
Overheat on Flue system – Flue temperature greater than 92°C
Non volatile lock out requiring a manual reset
Flame Simulation – Flame detection when gas valve is closed
This causes a Non volatile lockout requiring manual reset
Flow thermistor failure
Volatile lock out that will automatically reset when fault is repaired
OR
Thermal fuse has activated (Heat exchanger temperature greater than
165°C)
Volatile lock out that will reset when fault is repaired
Flue thermistor failure
Volatile lock out that will automatically reset when fault is repaired
CH return thermistor fault
V
olatile lock out that will automatically reset when fault is repaired
Gas vale solenoid failure
Fan failure
Boiler Chip Card Error.
B
C
C i
s no
t
suit
able for the boiler model
Boiler
Chip C
ard Error
BCC is not connected
Boiler Chip Card Error
Boiler
Chip C
ar
d Error
Boiler Chip Card Error
Boiler Chip Card Error
R
e
turn Temperature is greater than Flow temperature +12°.
Temperature difference between Flow and Return is greater than
45°C.
Volatile lock out that will reset when fault is repaired.
No wa
t
er flow across Heat exchanger
Return temperature has not changed by more than 1° within first
15seconds from boiler firing
Boiler
Chip C
ard Error
AACCTTIIOONNSS
Check for power failure
Check Pump operation
Check there is no air in Heat exchanger and check system bypass
Check Temperature thermistors are located on pipe work correctly
Check resistance of thermistors
Check gas supply and inlet operating (working) pressure
Check Gas valve operation and continuity across gas valve
electrical lead.
Check condensate drain is not blocked
Check entire flue system is connected correctly and terminated
correctly
Check detection (flame sensing) Electrode and lead
Check Pump operation
Check there is no air in Heat exchanger and check system bypass
Check Temperature thermistors are located on pipe work correctly
Check resistance of thermistors
Check there is no air in Heat Exchanger and CH system.
Check entire flue system is connected correctly and terminated
correctly
Check minimum and maximum gas rates are correct
Check
for correct water circulation
Check Heat exchanger flue ways are clean
Check continuity of sensor leads
Check detection (flame sensing) electrode is clean
Check burner surface is clean
Check Gas valve operation and gas valve electrical supply
Check resistance across thermistor and check continuity of sensor
leads at PCB connection 6
Major fault. Possible causes are:-
Complete dry fire that requires a replacement heat exchanger.
Leak of Hot gases from combustion circuit.
Faulty sensor that requires main Heat exchanger replacing
Check resistance across thermistor and check continuity of sensors
leads at PCB connection 8
Check resistance across thermistor and check continuity of
ther
mistor leads at PCB connection 6
Check resistance across Gas valve solenoid
Check con
tinuity of Gas v
alv
e lead at PCB connection 2A
Check electrical supply to fan and continuity of fan leads at PCB
connections 3 Check signal control connections to fan and
continuity at PCB connection 8
Replace with Correct BCC
R
efit
BCC; ensure it is located correctly
Replace BCC
BCC is damaged, Replace BCC
R
epl
ac
e with correct BCC
Replace with correct BCC
Reset the boiler following the BCC fitting Instructions
Check Flow and R
e
turn Sensors are correctly connected
Check Resistances of Flow and of Return thermistors
Check for air in Heat Exchanger
Check heating system Pipework is correct
Check Flow and R
e
turn Sensors are correctly connected
Check Resistances of Flow and of Return thermistors
Check for air in Heat Exchanger
Check heating system Pipework is correct
R
ese
t the boiler following the BCC fitting instructions
EERRRROORR CCOODDEE
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