Operation Manual
These fault codes can only be cleared by pressing the reset push-button, then display
panel will be
in
stand-by mode. While
in
lockout conditions, Burner LED will turn RED.
2.
Blocking Conditions
• Boiler over heat
• Failure
CH
flow sensor (NTC)
• Failure flue gas sensor (NTC)
• Failure
CH
return sensor (NTC)
• Failure power supply
• Failure water pressure
These fault codes will reset as soon as the cause
of
the problem disappears. For
example, when
CH
water pressure is out
of
operating range, blocking condition will be
generated and keep the system off until the pressure
is
within operating range again.
8.3
Lockout
Conditions
and
Solutions
-
Error
Cause
Solution - Check list
code
NO
Power
supply connections. Check
lCD
Lack
of
electricity.
;....
On
I
off
switch is
ON
display
)-
3
amp
fuse in fuse spur
or
4amp
fuse PCB
Lack
of
circulation, Check
Lockout flue gas
overheat
;;;.
Flow & Return isolation valves are open.
01
~
Ful1
TRV
system have a by-pass
The
flue gas sensor sensed
.,.
By-pass settings
(over
105
°C.)
,.,
Pump
failure
or
set to maximum 3 setting
I
,
.,
Faulty Flue-gas
NTC
or
wire detached
- Lack
of
circulation, Check
Lockout
boiler overheat
j;.
Flow & Return isolation valves are open.
01
.
~
Full
TRV
systems have a by-pass
CH
flow temp. has exceeded t 05 °C
~
By-pass settings
or
CH
return temp. exceeds
90
°C
,.
Pump tai lure
or
set
to maximum3 setting
:..
Faulty Flow I return NTC
or
wire
detached
Boiler overheat
06
CH flow temp has exceeded 95
°C
,..
Boiler will remain
in
this error mode until
or
return temp. exceeds 90°C,
flow temperature drops into operating range.
Heat exchanger
overheat
stat
12
);.
Check
Thermal
cut
out in heat exchanger for
Thermal
cut-off
160
°C
may have continuity.
operated.
If
boiJer is cold -
13
;...
Check
wiring has not become disconnected
or
Flue gas NTC Open circuit
Sensor has been damaged.
~
Replace NTC
35