47
AGUADENS
COSMOGAS
7.11.1 - Diagnostics “Loc” block fault
codes and potential solution
Block
Block Description
Checks
Solutions
Loc 0
Internal memory error
E2prom at command
board
Replace the command and control board.
Loc 1
1 No flame detection after
three successive ignition
attempts.
Control: Supply gas pressure (see chapter 6.6),
sparks on the ignition electrodes (see chapter
8.5);correct combustion air pressure (see chapter
6.7); 220Vac electric power supply to the gas valve;
electric resistance of the two gas valve coils of 0.88
Kohm and 6.59 Kohm
If the burner switches on and switches off at the end
of the ignition attempt, check: that the ionisation
current is at a value over 4 (follow the procedure in
chapter 8.13)
the supply pressure is not correct, operate upstream
from the appliance to restore it; if the pressure of
the combustion air is not correct, operate on the
air intake/fumes exhaust circuit to eliminate any
obstructions. If the current at the gas valve is not
230Vac, the command and control board must be
replaced. If the electric resistance of the gas valve
is not 0.88 Kohm and 6.59 Kohm, the valve must be
replaced.
If the ionisation current is not over 4, the CO2 must
be checked (follow chapter 6.8) and restore its
correct value, check the ionisation electrode and
replace it if necessary. Check the integrity of the
ionisation current electric circuit cables.
Loc 2
Gas valve command relay
broken
Replace the command and control board.
Loc 3
Internal safety relay
failure at command board
Replace the command and control board.
Loc 4
Appliance in error mode
for more than 20 hours
Control the last error displayed in the board.
Operate according to the last error displayed.
Loc 5
Fan out of speed for
more than 60 seconds
Ceck that it is powered at 300 Vdc.
If the fan is powered, it must be replaced, alternatively
replace the command and control board.
Loc 6
Software error inside the
command board
Replace the command and control board.
Loc 7
Content of the memo-
ry E2prom inside the
command board, not
updated
Replace the command and control board.
Loc 8
Parameters inside
the E2prom memory,
incorrect
Replace the command and control board.
Loc 9
Software error inside the
command board
Replace the command and control board.
Loc 10
Software error inside the
command board
Replace the command and control board.
Loc 11
Not applicable
Loc 12
Not applicable
Loc 13
The appliance has
reached 95°C
Ceck that the pump functions.
Restore water circulation or replace the command
and control board.
Loc 14
Exhaust flue maximum
temperature. To unblock
the error, contact a qua-
lified after-sales centre,
which must move switch
“B” in fig. 6.5 and press
the RESET key. Therefo-
re, put the switch back in
the original position.
Check that the pump is operating correctly;
Measure that appliance performance; it must corre-
spond to that declared in the technical features.
If the pump does not operate, it must be replaced.
If the appliance is under-performing, the primary
heat exchanger might be dirty either on the exhaust
flue side or the domestic water side or both. Follow
instructions in paragraph 8.4 and ceck again.
Loc 15
Software error inside the
command board
Replace the command and control board.
Loc 16
Software error inside the
command board
Replace the command and control board.
7 - USE
