"Fault" Is Displayed - Viessmann VITOFLEX 300-UF Operating Instructions Manual

"Fault" is displayed

Warning
Risk of injury due to faults in the heating system
that have not been rectified.
In the event of faults, shut down the heating sys-
tem and safeguard against reconnection.
Immediately notify faults to the responsible body
or individual.
Rectify faults immediately.
When rectifying a fault, no-one else should be
present in the danger zone around the heating
system.
Prior to starting the heating system ensure that
no-one else is within the danger zone around
the heating system.
Fault message
Serious system fault
Fault messages
No. Fault message
001 Fault: High limit safety cut-out
002 Fault: Water shortage
003 Fault: Water pressure
004 Fault: Level, extinguishing water
006 Fault: Thermal contact, infeed
grate
007 Fault: Shut-off gate valve is stick-
ing
008 Fault: Reversal, rotary lock valve
Further information can be found in chapter "Checking
fault messages", see page 23.
1. Tap on
"System fault"
or
Tap on
"To the fault messages"
2. Locate the fault.
3. Check the fault.
4. Eliminate the cause of the fault or contact the
Technical Service. See table "Fault messages".
5. Acknowledge the fault message on the program-
ming unit; see page 24.
Cause
Setting for set flow temperature is
too high
Faulty system component (boiler
circuit pump or return valve)
Power consumption has suddenly
dropped
–
Leak in heating system
Leak in safety valve
Pressure relief valve is faulty
(system pressure is too high)
Too little water in the extinguish-
ing water tank
Electrical fault on drive motor
Gearbox or bearing damage
Spring return motor is faulty
Shut-off gate valve does not
reach end position
Rotary lock valve is blocked
What to do if...
Remedy
Check the setting for the set flow
temperature
Check boiler circuit pump and
temperature maintenance
Check heat draw-off
Undo protective cap on high limit
safety cut-out and press reset but-
ton (only possible once boiler wa-
ter temperature is < 70 °C)
Notify heating system installer
Notify heating system installer
Have a contractor check the pres-
sure relief valve and replace if
necessary
Fill water tank
Consult a qualified electrician
Replace gearbox or bearing
Repair or replace spring return
motor
Check for trapped foreign bodies
■
and remove if necessary
Check and adjust limit switch
■
Check rotary lock valve for trap-
ped foreign bodies and remove if
necessary
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