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DIVAtop MICRO C
34
EN
cod. 3540S270 - 02/2010 (Rev. 00)
Opening the casing
To open the boiler casing:
1.
Undo the screws A (see fig. 22).
2.
Turn the casing (see fig. 22).
3.
Lift the casing.
B
Before carrying out any operation inside the boiler, disconnect the power supply
and close the gas cock upstream
fig. 22 - Opening the casing
Combustion analysis
1.
Insert the probe into the flue;
2.
Check that the relief valve is connected to a drain funnel;
3.
Activate TEST mode;
4.
Wait 10 minutes for the boiler to stabilize;
5.
Take the measurement.
4.4 Troubleshooting
Diagnostics
The boiler is equipped with an advanced self-diagnosis system. In case of a boiler fault,
the display will flash together with the fault symbol (detail 22 - fig. 1) indicating the fault
code.
There are faults that cause permanent shutdown (marked with the letter “
A
”): to restore
operation just press the RESET button (detail 8 - fig. 1) for 1 second or RESET on the
optional remote timer control if installed; if the boiler fails to start, it is necessary to first
eliminate the fault.
Other faults (marked with the letter “
F
”) cause temporary shutdowns that are automati-
cally reset as soon as the value returns within the boiler's normal working range.
Table of faults
Table. 2
Code
fault
Fault
Possible cause
Recommended cure
A01
No burner ignition
No gas
Check the regular gas flow to the
boiler and that the air has been
eliminated from the pipes
Ignition/detection electrode fault
Check the wiring of the electrode
and that it is correctly positioned
and free of any deposits
Defective gas valve
Check and change the gas valve
Ignition power too low
Adjust the ignition power
A02
Flame present signal
with burner off
Electrode fault
Check the ionisation electrode wir-
ing
Card trouble
Check the card
toA03
Over-temperature pro-
tection trips
Heating sensor damaged
Check the correct positioning and
operation of the heating sensor
No water circulation in the system
Check the circulator
Air in the system
Vent the system
F04
Fume thermostat acti-
vated (after activation
of the fume thermostat,
boiler operation is pre-
vented for 20 minutes)
Fume thermostat contact open
Check the thermostat
Wiring disconnected
Check the wiring
Flue not correctly sized or
obstructed
Change the flue
A06
No flame after the igni-
tion phase
Low pressure in the gas system
Check the gas pressure
Burner minimum pressure setting
Check the pressures
F10
Delivery 1 sensor fault
Sensor damaged
Check the wiring or replace the sen-
sor
Wiring shorted
Wiring disconnected
F11
Tap water sensor fault
Sensor damaged
Check the wiring or replace the sen-
sor
Wiring shorted
Wiring disconnected
A
A
1
3
2
F14
Delivery 2 sensor fault
Sensor damaged
Check the wiring or replace the sen-
sor
Wiring shorted
Wiring disconnected
F34
Supply voltage under
170V.
Electric mains trouble
Check the electrical system
F35
Irregular mains fre-
quency
Electric mains trouble
Check the electrical system
F37
Incorrect system water
pressure
Pressure too low
Fill the system
Sensor damaged
Check the sensor
F39
External sensor fault
Probe damaged or wiring shorted
Check the wiring or change the
sensor
Sensor disconnected after activat-
ing the sliding temperature
Reconnect the external sensor or
disable the sliding temperature
F40
Incorrect system water
pressure
Pressure too high
Check the system
Check the safety valve
Check the expansion tank
A41
Sensor positioning
Delivery sensor detached from pipe
Check the correct positioning and
operation of the heating sensor
F42
Heating sensor fault
Sensor damaged
Change the sensor
F43
Exchanger protection
trips.
No system H
2
O circulation
Check the circulator
Air in the system
Vent the system
F47
System water pres-
sure sensor fault
Wiring disconnected
Check the wiring
F50
Modureg fault
Wiring disconnected
Check the wiring
Code
fault
Fault
Possible cause
Recommended cure
