Appliance description
3
1.5
Operation lights
Three lights (9 in Fig. 1.3) give detailed indication
regarding the operation of the boiler.
The following table gives the relationship between
each of the possible light combinations and their
meaning during the normal operation of the boiler.
A short pulse every 4
seconds:
stand---by condition
Function selector in
position.
Anti---freeze system active
1 second pulse every 2
seconds: normally
operating boiler. Function
selector in
position
C.h. operation
Frost protect operation
Faulty c.h. temperature
probe NTC
Faulty primary circuit
(no water or absence of
flow)
Lack of burner ignition
Safety thermostat lock out
Faulty fan control system
Flue temperature probe
NTC lock out
Open flue temperature
probe NTC
Faulty external temp.
probe (if fitted)
Flame detection error
Other faults
Lack of power supply or
faulty electronic control
p.c.b.
Meaning of symbols
Lamp OFF
Lamp ON
Flashing lamp, alone or simultaneously
with an other lamp.
Flashing lamp, alternate with another
lamp.
If the lights combination observed is not included
in the above table a fault may be indicated.
Reference should be made to the following table.
In this case switch off the boiler, as described in
section 2.5 on page 6 and call a competent and re-
sponsible Service Engineer.
USE
