51
AGUAPLUS
COSMOGAS
14 - USE
14.10.1 - Diagnostics: “Loc” lock
Lock-
up
Lock-up description
Checks
Solutions
Loc 1
No flame detected after
5 consecutive ignition
attempts.
Supply gas pressure (see section 13.7);
If the pressure is incorrect, it must be restored
upstream of the appliance;
Sparks on the ignition electrodes (see section 15.5); Check and correct electrode positions (section 15.5);
Correct gas pressure and CO2 value (see sections
13.7 and 13.8);
Remove any obstructions in the air intake and flue
exhaust ducts;
230Vac power supply to the gas valve;
If the supply current to the gas valve is not 230 Vac,
replace the control board;
0.88 Kohm and 6.59 Kohm electrical resistance of
the two gas valve coils
If the resistance does not match, replace the gas
valve;
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 15.12)
If the ionisation current does not match, check the
CO2 as per section 13.8. 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
Check whether the supply safety thermostat has
tripped;
WARNING !!! If the flue exhaust temperature
safety fuse trips, you must contact the appliance
manufacturer to avoid serious damage to the
exchanger.
Check whether the flue exhaust safety fuse has
tripped;
Loc 3
Gas valve loses power
during operation
Make sure the electrical connections between the
gas valve and control board are in good condition;
If the electrical connections are interrupted, restore
them;
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;
If the electrical connections are interrupted, restore
them;
If the connections are in good condition, try replacing
the gas valve or the control board;
Loc 5
(*)
Gas valve circuit
Check whether the supply safety thermostat has
tripped;
WARNING !!! If the flue exhaust temperature
safety fuse trips, you must contact the appliance
manufacturer to avoid serious damage to the
exchanger.
Check whether the flue exhaust safety fuse has
tripped;
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;
If the power supply does not match, replace the control
board;
Check the PWM connection to the fan;
If there is no fan PWM dialogue, replace the control
board;
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
