Technical data
51
Is there 230V at
pin 2 of
terminal X16?
(Right black wire)
Is there 230V at
pin 1 of
terminal X16?
(Left black wire)
Is there 230V at
pin 2 of
terminal X8?
(Left orange wire)
Is there 230V at
pin 1 of
terminal X6?
(Brown wire)
Is there 230V at
pin L of
terminal CN1 on the
ignition board?
(Brown wire)
Is there 230V at
pin L2 of
terminal CN2?
(White wire)
Is there 230V at
pin L3 of
terminal CN2?
(Brown wire)
Is there 230V at
pin 1 of
terminal X8?
(Right orange wire)
Replace the
control board
Replace the
control board
Replace the air
pressure switch
Replace the
control board
Replace the
ignition board
Fault with
interboard wiring.
Repair or replace
Check harness and
repair or replace
Replace the fan
Gain access to the
fan. Is there 230V
across the fan
terminals?
(Brown and
yellow wires)
Check and replace
the air sensing
tubes or replace
the air pressure
switch
Replace the Ignition
board
Is there a 230V
supply at pin L1 at
terminal CN2?
(Grey wire)
Check for faults on
the electrode lead
and electrode and
repair as necessary.
Does sparking
occur?
Does sparking occur?
Note: If the appliance is
very cold, sparking may
be delayed because of
poor acceleration of the
fan
Hot water high limit stat has tripped.
Investigate cause of overheating
and/or replace
Safety limit stat has tripped. Investigate cause of
overheating and/or replace
Does the fan run?
NO
NO
NO
NO
NO
NO
NO
NO
NO
NO
NO
NO
NO
POINT
D
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
FAILURE AT POINT B
FAILURE AT POINT C
YES