5.9.2
5.9.2
Start failure
Start failure
CONDITON
POSSIBLE CAUSE
ACTION
Control loop closed, signal
lamp for start limit is on,
burner or the start-up
program of the control unit
does not start. The lockout
indicator remains at symbol
Faulty control unit
Change the control unit
Control loop closed, burner
or the start-up program of the
control unit does not start.
The lockout indicator remains
at symbol
◄
The control unit (connector 8)
is not receiving required start
signal from servomotor (limit
switch II)
1.
A break in control circuit
2.
Faulty servomotor
3.
Faulty control unit
4.
Air dampers are stuck
1.
Clear the break
2.
Change the servomotor
3.
Change the control unit
4.
Release
the
dampers,
lubricate
Burner motor starts, program
remains at pre- purge period
▲
Servomotor does not reach
the position of full load of air
dampers (limit switch I)
1.
faulty servomotor
2.
faulty limit switch in ser-
vomotor
3.
Faulty control unit
4.
jammed air dampers
5.
incorrect setting on cam
switch
1.
Change the servomotor
2.
Change the limit switch
3.
Change control unit
4.
Release
the
dampers,
lubricate
5.
Correct the settings
Burner motor starts, program
remains at pre- purge period
▼
.
Servomotor does not reach
the position of ignition load of
air dampers(limit switch III)
1.
faulty servomotor
2.
faulty limit switch in ser-
vomotor
3.
Faulty control unit
4.
jammed air dampers
5.
incorrect setting on cam
switch
1.
Change the servomotor
2.
Change the limit switch
3.
Change control unit
4.
Release
the
dampers,
lubricate
5.
Correct the settings
64 (77)
RPMARINES 30820641GB
5. Maintenance