Unigas LO140 G-.TN Series, Instructions For Installation, Use And Maintenance Manual, Page: 24 / 36

24
TROUBLESHOOTING
BURNER D
O
ES
N’T
START
REPETITI
O
N O
F
PRE-
PURGE
NO
ISY FUEL PUMP
BURNER D
O
ES
N’T
START AND LOCKS
BURNER STA
R
TS AND
LOCKS
BURNER D
O
ES
N’T
SWITCH T
O
HI
GH FLAME
BURNER L
O
CK
DURIN
G
O
PERATI
O
N
BURNER L
O
CK
S AND
REPEATS CYCL
E
DURIN
G
OPER
ATION
MAINS SWITCH OPEN
       
FUSES INTERVENTION
       
MAXIMUM PRESSURE SWITCH FAULT
       
AUXILIARIES RELAY FUSES
INTERVENTION
       
CONTROL BOX FAULT
       
SERVOCONTROL FAULT
       
SMOKY FLAME
       
IGNITION TRANSFORMER FAULT
       
IGNITION ELECTRODES DIRTY OR BAD
POSITION
       
DIRTY NOZZLE
       
FUEL SOLENOID VALVE DEFECTIVE
       
PHORESISTANCE DIRTY OR
DEFECTIVE
       
HIGH - LOW FLAME THERMOSTAT
DEFECTIVE
       
BAD POSITION OF SERVOCONTROL
CAMS
       
FUEL LOW PRESSURE
       
FUEL FILTERS DIRTY
       
WIRING DIAGRAMS
WARNING:
1 - Electrical supply 230V 50Hz 1N a.c.
2 - Don’t reverse phase with neutral
3 - Ensure to the burner a proper earthing
See the attached wiring diagrams.
WIRING DIAGRAM SE01-361 Single-stage burner
WIRING DIAGRAM SE18-068 Double-stage burner