- 9 -
USE
APPLIANCE DESCRIPTION
1.5 Operation lights
Three lights (9 in Fig. 1.3) give detailed indi-
cation regarding the operation of the boiler.
The following table gives the relationship
between each of the possible light combina-
tions and their meaning.
A short pulse every 4 sec-
onds: stand-by condition.
Function selector in
position.
Anti-freeze system active
1 second pulse every 2
seconds: normally oper-
ating boiler. Function se-
lector in
position
C.h. operation
Frost protect operation
D.h.w. operation
Excessive temperature
on primary circuit
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 de-
scribed in section "Extinguishing" to page
12 and call a competent and responsible
Service Engineer.
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
fauly electr. control p.c.b.
Meaning of symbols:
Lamp OFF
Lamp ON
Flashing lamp, alone or simultane-
ously with an other lamp
Flashing lamp, alternate with another
lamp