23
5603 884 - 04
Vitoflex 300-UF Service & Maintenance
Troubleshooting Guide
System Faults
(continued)
Text for error
shown on display
Indicator
Possible cause
Check / remedy
Malfunction,
combustion
chamber door
open
- Limit switch on the
combustion chamber
door (S1)
- The combustion chamber
door is open or not
completely closed
- The distance is too large
between the combustion
chamber door and the limit
switch (proximity switch) in
the boiler panels
- Limit switch is defective
- Close combustion chamber door
- The distance between the panel
of the combustion chamber door and
the limit switch (proximity switch)
behind the combustion chamber panels
may only be a maximum of
3
/
16
”
(5 mm)
Exhaust gas
sensor defective
- Temperature sensor
in the exhaust gas
(B1)
- Damaged sensor
connecting line
- Sensor is defective
- Call a certified electrician
Sensor for in-feed
auger defective
- Temperature sensor
on the in-feed
auger (B02)
- Damaged sensor
connecting line
- Sensor is defective
- Call a certified electrician
Burner sensor
defective
- Temperature sensor
in the boiler supply
(B20)
- Damaged sensor
connecting line
- Sensor is defective
- Call a certified electrician
Sensor for burner
return flow
defective
- Temperature sensor
in the boiler return
(B20.1)
- Damaged sensor
connecting line
- Sensor is defective
- Call a certified electrician
Malfunction,
ash bin for
combustion
chamber removed
- Limit switch on the
ash bin (S14)
- Ash bin is not mounted
correctly
- The distance is too large
between the flat steel and
limit switch (proximity switch)
- Sensor is defective
- Mount the ash bin correctly
- The distance between the flat steel
and limit switch (proximity switch)
may only be a maximum of
3
/
16
”
..
(5 mm)
Malfunction,
slide valve
- End switch on the
slide valve (S10)
- Slide valve does not open all
the way
- Make slide valve smooth operating
- Acknowledge in Screen 2
Malfunction,
defective SPS
input safety
cut-out
- Fixed high limit (F00) - The fixed high limit (F00)
has disconnected due to
a short-circuit (defective
sensor or defective
connecting line)
- Connect fixed high limit
- If triggered again, call a certified
..
electrician
- Acknowledge in Screen 2
