46
1
4
3
2
5
37
38
46
INS
TALLER
US
ER
MAINTEN
AN
CE TECHNI
CI
AN
Key:
1 - Fuse 3.15 AF
2 - Removable memory
(A19)
P.C.B.
-
Non-optimal ignition of first ignitions of the burner.
Even
if the burner is perfectly calibrated, first ignition of the burner
(after calibration) can be sub-optimal; the system automatically
regulates ignition until it finds optimal ignition of the said burner.
-
Frequent trips of the overheating safety device thermostat
function.
It can depend on the lack of water in the boiler, little
water circulation in the system (or blocked pump, see
Par. 1.27
).
Check on the pressure gauge that the system pressure is within
established limits. Check that the radiator valves are not closed
and also the functionality of the pump.
-
Siphon blocked.
Th
is may be caused by dirt or combustion
products deposited inside. Check that there are no residues of
material blocking the
fl
ow of condensate.
-
Heat exchanger blocked.
Th
is may be caused by the drain trap
being blocked. Check that there are no residues of material
blocking the
fl
ow of condensate.
-
Noise due to air in the system.
Check opening of the special air
vent valve cap (Part. 23 Fig. 32). Make sure the system pressure
and expansion vessel pre-charge values are within the set limits.
Th
e factory-set pressure values of the expansion vessel must be
1.0 bar, the value of system pressure must be between 1 and 1.2
bar.
- Noise due to air inside the condensation module. Use the manual
air vent valve (Part. 23 Fig. 32) to eliminate any air present in the
condensation module. When the operation has been performed,
close the manual vent valve.
- Poor production of D.H.W. If a drop in performance is detected
during supply of D.H.W., it is possible that the condensation
module or D.H.W. heat exchanger is clogged. In this case, contact
Immergas After-Sales Assistance Service that has procedures to
clean the module or D.H.W. heat exchanger.
Any room thermostat or ON-OFF must be connected to clamps
40 and 41 eliminating jumper X40.
Any CAR
V2
must be connected to terminals 44 and 41 complying
with the polarity and eliminating jumper X40.
Th
e connector X5 is used for the connection to the relay board.
Th
e connector X6 is for connection to a personal computer.
Th
e connector X8 is used for software updating operations.
3.
6
REMOVABLE MEMORY.
Th
e P.C.B. is equipped with a removable memory (Ref. 2 Fig.
38), which records all operation parameters and system custo-
misations.
Should the P.C.B. be replaced, you can use the memory of the
replaced board again, so it is not necessary to reconfigure the
appliance.
ATTENTION:
replacing the memory must be carried
out after disconnecting all electrical
connection of the P.C.B.
3.
7
TROUBLESHOOTING.
Maintenance operations must be carried out by an
authorised company (e.g. Authorised After-Sales
Technical Assistance Service).
-
Smell of gas.
Caused by leakage from gas circuit pipelines. Check
sealing e
ffi
ciency of gas intake circuit.
-
Repeated ignition blocks.
No gas, check the presence of pressure
in the network and that the gas adduction cock is open.
-
Irregular combustion or noisiness.
It may be caused by: a
dirty burner, incorrect combustion parameters, intake-exhaust
terminal not correctly installed. Check the above components.
Key:
1 - Gas valve outlet pressure
point
2 - Coil
3 - Wiring connector
4 - Gas valve inlet pressure
point
5 - P. Ref.
SGV 100 B
&
P GAS valve
