34
Concord CXSD/H -
Installation & Servicing
FAULT FINDING
FAUL
T FINDING FAUL
T FINDING FAUL
T FINDING FAUL
T FINDING FAUL
T FINDING FAUL
T FINDING
53 FAULT FINDING FLOW CHART
Change outside
sensor.
Press [Copy]
GAS VALVE
FAULT
BOILER
SENSOR
FAULT
OVERHEAT
FAULT
OUTSIDE
SENSOR
FAULT
Check pump
connections.
Press [Copy]
Press O/H reset
button.
Press [Copy]
Check wiring.
Press [Copy]
Check water
flow.
Press [Copy]
Replace o/h stat.
Press [Copy]
Check system.
Press [Copy]
Refer to
screens
Refer to
screens
STANDBY
BURNER
LOCK OUT
Check HT leads
and electrode
positions
Check wiring
to generator.
Press [Copy]
Replace
generator.
Press [Copy]
Change pump.
Press [Copy]
Refer to screens
Check wiring.
Press [Copy]
PUMP FAULT
R
E
F
E
R
T
O
I
D
E
A
L
B
O
I
L
E
R
S
Is there a
spark ?
NO
DOWNDRAUGHT
FAULT
Check flue
system.
Wait 15 mins.
Does boiler
fire ?
Replace
TTB.
Refer to
screens
Check gas
pressure.
Press [Copy]
Check
wiring.
Press [Copy]
Replace faulty
solenoid.
Press [Copy]
Refer to
screens
Change
gas valve
or
solenoid.
Press
[Copy]
Observe the display. Take actions as
follows, depending upon the display:
Check system.
Press [Copy]
Replace sensor
Press [Copy]
Check gas.
Press [Copy]
Press
[Copy]
Check
gas
valve
wiring.
Press
[Copy]
Check
detection
probe.
Press
[Copy]
YES
Replace
detection
probe
Boiler will not light
Do any external
controls call for
heat ?
Is 230V ± 10%
available at
appliance ?
Reset timer or
status as
appropriate
Reset external
controls as
appropriate
Carry out electrical
checks.
Check all fuses.
YES
NO
NO
NO
YES
YES
Check boiler
programme timer and
status, as described
in Frame 28.
Does programme
timer require heat ?
Press [O/1] button
Summary of Contents for Concord CXSD 40/H
Page 1: ......
