Operation Lights - Biasi M96A.24SM User Manual And Installation Instructions

Appliance description
1.5

Operation lights

Three lights (10 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.
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
D.h.w. 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 described in
section 2.6 on page 6 and call a competent and re-
sponsible Service Engineer.
or
Meaning of symbols
Faulty c.h. temperature
probe NTC
Faulty d.h.w temperature
probe NTC
Faulty flue temperature
probe NTC
Faulty primary circuit
(no water or low c.h.
pressure)
Faulty primary circuit
(absence of flow)
Faulty air pressure sensor
Lack of burner ignition (no
ignition signal from the full
seqence ignition device)
Safety thermostat lock out
Flue temperature probe
NTC lock out
Flame detection error
Other faults
Lack of power supply or
fauly electr. control p.c.b.
Lamp OFF
Lamp ON
Flashing lamp, alone or simultaneously
with an other lamp.
Flashing lamp, alternate with another
lamp.
3