Possible Malfunctions And Their Causes - S+H Nolting NG-L-30 Manual De Instrucciones

9. POSSIBLE MALFUNCTIONS AND THEIR CAUSES :

Malfunction:
WAH does not start
CAH starts, there is ignition but the
solenoid valve does not
open....malfunction shutdown
WAH starts up, no ignition, solenoid
valve opens, gas flows
in......malfunction shutdown
WAH starts up, ignition present,
solenoid valve opens, gas flows in
and is ignited...after several seconds
malfunction shutdown occurs
WAH starts up, ignition present,
solenoid valve opens, no gas flows
In.......malfunction shut-down
WAH occasionally goes to malfunction Infrared flicker sensor
Cause:
No room thermostat is connected
Room thermostat is incorrectly
set
Electrical power supply
No gas
Safety temperature controller
triggered or is defective
(Pos. 13 )
Automatic gas firing unit
defective (Pos. 14 )
Infrared flicker sensor defective
(Pos. 9) or is exposed to outside
light
Infrared flicker sensor gives a
flame signal during the lead-in
time (red LED), although no
flame has been established.
Differential pressure monitor did
not trigger
Ignition electrode defective
(Pos. 7)
Ignition gap to large
Ignition cable defective (Pos. 20)
Automatic gas firing unit
defective (Pos. 14 )
Infrared flicker sensor fouled
or defective
Magnet mounting defective
(Pos. 11)
Gas fitting defective (Pos. 2)
Gas pressure
Nozzle fouled
Ignition
Switching unit
Gas pressure
- 12 -
Remedy:
Plug in a dummy plug on the
thermostat socket.
Check setting
Check the power plug and the
power supply
Check gas hook-up pressure
Reset or replace
Replace
Exchange or prevent
impingement of external light.
Check
Replace
Reduce
Replace
Replace
Clean or replace
Replace
Replace
Inspect
Clean, replace
Inspect
Inspect
Check for loose contacts
Inspect