Unigas HR93A, Manual Of Installation - Use - Maintenance

Page: 43 / 52

C.I.B. UNIGAS - M039213CB
43
TROUBLESHOOTING
CAUSE / FAULT
BURNER DOES
N’T
S
T
A
R
T
CONTINUE
P
R
E
-PURGUE
BURNER DOE
S
N’T START
AND LOCKS
BURNER DOE
S
N’T START
AND REPEA
TS THE
CY
CLE
B
U
RNE
R
STARTS
AND
REP
EATS THE CYCLE
BURNER DOES
N’T
SW
ITCH TO HIGH
F
L
AME
BURNER’S LOC
K
OUT
DURING OPERA
T
ION
BURNER STOP
S
A
ND
REP
EATS CYCLE
DURING
O
PERATI
O
N
BURNER’S LOC
K
OUT
A
F
TE
R
START
THE FL
AME CONTROL
DEV.
REPEA
TS THE
CYCLE WITH
OUT
GIVE
CONSE
N
T
MAIN SWITCH OPEN

ABSENCE OF GAS

MINIMUM GAS PRESSURE SWITCH FAULT OR
BAD SETTING
   
BOILER THERMOSTATS OPEN

OVERLOAD TRIPPED INTERVENTION

FUSES INTERVENTION

AIR PRESSURE SWITCH FAULT OR BAD
SETTING
   
DEFECTIVE CONTROL BOX
   
DEFECTIVE AIR DAMPER ACTUATOR

DEFECTIVE IGNITION TRANSFORMER

IGNITION ELECTRODE WRONG POSITION

THROTTLE VALVE BAD SETTING

DEFECTIVE GAS GOVERNOR
  
DEFECTIVE HI-LO FLAME THERMOSTAT

ACTUATOR CAM BAD SETTING

DETECTION ELECTRODE BAD POSITION OR
DEFECTIVE DETECTION CIRCUIT
 
REVERSED PHASE AND NEUTRAL
CONNECTION
