Viessmann VITOFLEX 300-UF Operating Instructions Manual page 30

What to do if...
"Fault" is displayed
No. Fault message
075 Fault: Motor protection, silo X
076 Fault: Safety limit switch
Silo X
077 Fault: Float switch, ash pit
078 Fault: Safety limit switch, convey-
or devices
charge cabinet, ash removal,
Boiler 1
079 Fault: Motor protection, conveyor
device, charging chamber
Ash removal, Boiler 1
080 Fault: Motor protection, conveyor
device, charging chamber
Ash removal, Boiler 2
081 Fault: Inverter, primary air fan
Motor failure
082 Fault: Inverter, secondary fan
Motor failure
083 Fault: Inverter, recirculation air
fan
Motor failure
"Warning" is displayed
Warning message
Information or minor system fault
Further information can be found in chapter "Checking
fault messages", see page 23.
1. Tap the button "Fault in the system"
or
Tap the button "To the fault messages"
2. Locate the warning.
Warning messages
No. Fault message
001 Warning: Motor protection, ash
removal
002 Warning: Maximum runtime, ash
removal exceeded
003 Warning: System running without
O2 control
30
(cont.)
Cause
Bearing damage
Motor is overloaded due to block-
age (foreign body)
Service hatch on a conveyor de-
vice is open
Ash pit full
Service hatch on an ash removal
device is open
Bearing damage
Motor is overloaded due to block-
age (foreign body)
Bearing damage
Motor is overloaded due to block-
age (foreign body)
Primary air fan faulty
Secondary fan faulty
Recirculation air fan faulty
Cause
Motor is overloaded due to block-
age (foreign body)
Bearing damage
Ash removal light barrier is dirty
Ash removal light barrier is faulty
Lambda probe is severely con-
■
taminated or faulty
O2 signal converter is faulty
■
Remedy
Check for ease of operation
Remove foreign body
Close service hatch
Pump out ash pit
Close service hatch
Check for ease of operation
Remove foreign body
Check for ease of operation
Remove foreign body
Consult a qualified electrician or
Viessmann Technical Service
Consult a qualified electrician or
Viessmann Technical Service
Consult a qualified electrician or
Viessmann Technical Service
3. Check the warning.
4. Eliminate the cause of the warning or contact the
Technical Service. See table "Warning mes-
sages".
5. Acknowledge the warning message on the pro-
gramming unit; see page 24.
Remedy
Remove foreign body
Check for ease of operation
Clean transmitter and receiver of
the light barrier
Consult Viessmann Technical
Service
Consult Viessmann Technical
Service