Unigas PG70, Manual Of Installation - Use - Maintenance

Page: 31 / 56

CIB UNIGAS - M039191CA
31
Checking the detection current
To measure the detection signal follow the diagram on the next picture.
If the signal is not in the advised range, check the electrical contacts, the cleaning of the combustion head, the position of the photore-
sistor and if necessary replace it.
Seasonal stop
To stop the burner in the seasonal stop, proceed as follows:
1
turn the burner’s main switch to 0 (Off position)
2 disconnect the power mains
3 close the fuel manual valve of the supply line
Burner disposal
In case of disposal, follow the instructions according to the laws in force in your country about the “Disposal of materials”.
TROUBLESHOOTING
LOA24 LMO24 LMO44
Minimum current intensity with flame
45µA
Maximum current intensity without flame
5.5µA
Maximum possible current intensit with flamey
45µA 100µA 100µA
THE BURNER
DOESN’T START
THE BURNER REPEATS
PRE-
PURGE
NOISY FUE
L
PUMP
THE BURNER
DOESN’T START
AND STOPS
THE BURNER STARTS AND
STOPS
THE BURNER
DOESN’T SWITCH T
O
HI
GH F
LA
ME
THE BURNER STOPS DURING
OPERATION
TH
E BURNER ST
OPS
A
N
D REPEATS TH
E
CYCLE DUR
ING OPE-
RATION
MAIN SWITCH OPEN
●
LINE FUSE INTERVENTION
●
MAX. PRESSURE SWITCH FAULT
● ●
FAN THERMAL CUTOUT INTERVENTION
●
AUXILIARY RELAIS FUSES INTERVENTION
●
CONTROL BOX FAULT
● ● ● ● ●
SERVOCONTROL FAULT
●
SMOKEY FLAME
● ●
IGNITION TRANSFORMER FAULT
●
IGNITION ELECTRODE DIRTY OR WRONG
POSITIONED
●
DIRTY NOZZLE
● ●
FUEL SOLENOID VALVE DEFECTIVE
● ●
PHOTORESISTOR DIRTY OR DEFECTIVE
● ●
HI-LO FLAME THERMOSTAT DEFECTIVE
●
WRONG POSITION OF SERVOCONTROL
CAMS
●
FUEL PRESSURE TOO LOW
●
DIRTY FUEL FILTERS
● ● ●
MC TERMINAL BLOCK
34 35
SCALE µA DC