6
2
60T - 280T
COSMOGAS
16 - USE
16.1
5
.1 - Diagnostics: “Loc” lock
Lock-
up
Lock-up description
Checks
Solutions
Loc 1
No flame detected after
5 consecutive ignition
attempts.
A - Supply gas pressure (see section 15.7);
B - Sparks on the ignition electrodes (see section
17.5);
C - Correct gas pressure and CO2 value (see
sections 15.7 and 15.8);
D - 230Vac power supply to the gas valve;
E - 0,88 Kohm and 6,59 Kohm electrical resistance
of the two gas valve coils
F - If the burner ignites and goes out at the end of
the ignition attempt, make sure: that the ionisation
current value is greater than 4 (follow the procedure
in section 17.12)
A - If the pressure is incorrect, it must be restored
upstream of the appliance;
B - Check and correct electrode positions (section
17.5);
C - Remove any obstructions in the air intake and
flue exhaust ducts;
D - If the supply current to the gas valve is not 230
Vac, replace the control board;
E - If the resistance does not match, replace the gas
valve;
F - If the ionisation current does not match,
check the CO2 as per section 15.8. Make sure
the detection electrode is in good condition and,
if necessary, replace it. Make sure the detection
electrode connection cable is in good condition and,
if necessary, replace it.
Loc 2 (*) Gas valve not supplied
during ignition attempts
A - Check whether the supply safety thermostat has
tripped;
B - Check whether the flue exhaust safety fuse has
tripped;
ATTENTION !!! If the flue exhaust
temperature safety fuse trips, you must contact
the appliance manufacturer to avoid serious
damage to the exchanger.
Loc 3
Gas valve loses power
during operation
Make sure the electrical connections between the
gas valve and control board are in good condition;
A - If the electrical connections are interrupted, restore
them;
B - If the connections are in good condition, try
replacing the gas valve or the control board;
Loc 4
Gas valve relay does not
close
Make sure the electrical connections between the
gas valve and control board are in good condition;
A - If the electrical connections are interrupted, restore
them;
B - If the connections are in good condition, try
replacing the gas valve or the control board;
Loc 5 (*) Gas valve circuit
A - Check whether the supply safety thermostat has
tripped;
B - Check whether the flue exhaust safety fuse has
tripped;
ATTENTION !!! If the flue exhaust
temperature safety fuse trips, you must contact
the appliance manufacturer to avoid serious
damage to the exchanger.
Loc 6
Safety relay opening
error
Replace the command and control board
Loc 7
Safety relay closing error
Replace the command and control board
Loc 11 Locking error exceeding
20 hours
Press the RESET key to see the type of error (Err)
and proceed accordingly;
Loc 12 Fan error
A - Check the 230Vac power supply to the fan;
B - Check the PWM connection to the fan;
A - If the power supply does not match, replace the
control board;
B - If there is no fan PWM dialogue, replace the control
board;
C - Try replacing the fan;
Loc 13
Software error inside
command board
Replace the command and control board
Loc 14
Software error inside
command board
Replace the command and control board
Loc 15
Software error inside
command board
Replace the command and control board
Loc 16
Software error inside
command board
Replace the command and control board
Loc 17
Software error inside
command board
Replace the command and control board
Loc 18
Software error inside
command board
Replace the command and control board
Loc 19
Software error inside
command board
Replace the command and control board