P
A
R
T
IV
: MAIN
TENANCE
50
11.0
TROUBLESHOOTING
CAUSE
TROUBLE
THE BURNER
DO
ESN’TSTART
CON
T
INUE WITH PRE-
PU
R
G
E
DOESN’T START
A
ND
LOCK-OUT
DOESN’T START
A
ND
REP
EATS
THE
CYCLE
ST
AR
T
S
AN
D
R
E
PE
A
T
S
THE CYCLE
ST
AR
T
S
AN
D
L
O
C
K
-O
U
T
В
THE FLAME
MON
ITO
R
DEV
ICE
DOE
S
N’T
GI
VE
C
O
N
S
EN
T
TO
STA
R
T
DOESEN’T SWITCH
TO
HIGH F
LAME
DOESEN’T RETURN
IN
LO
W F
LAME
HE SE
RVO CONTROL IS
LOCK AND
V
IB
R
ATE
LOCK-OUT
DURING
O
PERATI
O
N
TURNS OF AND REPEA
TS
CYCL
E D
URING
O
PERATI
O
N
URNS OF AND
RE
PEA
T
S
CYCL
E D
URING
O
PERATI
O
N
URNS OF AND
RE
PEA
T
S
CYCL
E D
URING
O
PERATI
O
N
MAIN SWITCH OPEN
z
LACK OF GAS
z
z
MAXIMUM GAS PRESSURE SWITCH DEFECTIVE (IF
PROVIDED)
z
z
THERMOSTATS/PRESSURE SWITCHES DEFECTIVE
z
z
z
FAN MOTOR THERMAL CUTOUT INTERVENTION
z
OVERLOAD TRIPPED INTERVENTION
z
z
AUXILIARY FUSES INTERRUPTED
z
CONTROL BOX FAULTY
z
z
z
z
z
DEFECTIVE ACTUATOR
z
z
z
z
AIR PRESSURE SWITCH FAULT OR BAD SETTING
z
z
z
z
MINIMUM GAS PRESSURE SWITCH DEFECTIVE OR GAS
FILTER DIRTY
z
z
z
z
z
IGNITION TRANSFORMER FAULT
z
IGNITION ELECTRODES BAD POSITION
z
BUTTERFLY VALVE BAD SETTING
z
z
DEFECTIVE GAS GOVERNOR
z
z
z
z
GAS VALVE DEFECTIVE
z
BAD CONNECTION OR DEFECTIVE HIGH/LOW FLAME
THERMOSTAT OR PRESSURE SWITCH
z
z
z
WRONG SETTING ACTUATOR CAM
z
z
z
UV PROBE DIRTY OR DEFECTIVE
z
z
z
OIL FILTER DIRTY
z
Содержание HR91A
Страница 42: ...PART III OPERATION 42 Fig 18...
Страница 51: ...PART IV MAINTENANCE 51 12 0 BURNER EXPLODED VIEW...
Страница 53: ......
Страница 54: ......
Страница 55: ......
