37
Fault Finding & Solutions
Object:
Viwa 90 - 115 - 125 - 150
This document has been composed to find possible faults and solve
Attention:
This procedure must be applied by authorised persons.
Error Code
Description of the Error
Malfunction
Probable Cause
Solution(s)
ALL 01
NA
NA
NA
ALL 02
Low water pressure in the
system/system parameter
wrongly setted
Boiler does not work, ALL
02 error code flashing on
the screen
> Water pressure in the
boiler not enough
> TsP Parameter wrongly
settled (PAR4 must be 2)
1-) Fill the boiler 1,5-2 bar
2-) Check if the system pressure 1,5 - 2 bar from the
LCD display
3-) If problem persist Call for authorised service
4-) Reset & Restart boiler
ALL 03
High water pressure in the
system
Boiler does not work, ALL
03 error code flashing on
the screen
> High Water pressure in
the boiler higher than >
5,5 bar
1-) Drain the boiler water until 1,5-2 bar
2-) Check if the system pressure 1,5 - 2 bar from LCD
display
3-) If problem persist Call for authorised service
4-) Check expantion vessel pre set air AND/OR tank
membrane
5-) Reset & Restart boiler
ALL 04
Domestic heating water
temperature sensor faulty
Boiler does not work on
DHW mode but still work
on Central heating mode,
ALL 04 error code flashing
on the screen
> Domestic heating water
temperature sensor faulty
> DHW sensor not
connected
> PAR2 wrong setting
1-) Call for authorised service at first
ALL 05
Central heating FLOW
temperature sensor faulty
Boiler does not work, ALL
05 error code flashing on
the screen
> Central heating FLOW
temperature sensor faulty
> flow sensor is open or
short circuit
1-) Call for authorised service at first
2-) Reset & Restart boiler
ALL 06
No ignition
Flame is not detected
Boiler does not work, ALL
06 error code flashing on
the screen
> Gas supply failure
1-) RESET boiler at first check if problem removed
2-) Check other gas devices if they are working
3-) Check main gas suppy valve is open or not
4-) Check boiler gas suppy valve bellow the boiler
is open or not
5-) RESET boiler at first check if problem removed
6-) Call for authorised service at first
ALL 07
Safety/Limit thermostat
intervention
Boiler does not work, ALL
07 error code flashing on
the screen
Water overtemperature
(T>95°C)
> Lack of water on the
system
> Pump blockage
> Pump failiure
> Pump harness
> Installation blockage
1-) RESET boiler at first check if problem removed
2-) Check boiler central heating valves are open if
they are closed open of all
3-) Check all radiator valves are open if they are
closed open of all minimum 3 meters of radiator
must be open
4-) RESET boiler and check if problem removed
5-) Call for authorised service at first
ALL 08
Flame circuit failure / Flame
detection error
If the flame control section
recocnises the presence
of a flames in pahases
when they should not be
present, it means that there
is a breakdown in flame
detection circuit
> Aging or rust on the
electrode
> Electrode position
> Cabeling disconnections
> Water blokage on syphon
> Electronic board
1-) Call for authorised service at first
E 09
No water circulation in the
system
Boiler does not work, ALL
09 error code flashing on
the screen
Flow temperature sensor
has detected a temperature
rise in excess of 5°C/sec
> Lack of water on the
system
> Pump blockage
> Pump failiure
> Pump harness
> Installation blockage
1-) RESET boiler at first check if problem removed
2-) Check boiler central heating valves are open if
they are closed open of all
3-) Check all radiator valves are open if they are
closed open of all minimum 3 meters of radiator
must be open
4-) RESET boiler and check if problem removed
5-) Call for authorised service at first
3.3. FAULT FINDING & SOLUTIONS
3.3.1. Arıza Kodları Tablosu
