Ariston 100 L - Page 30

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Error
Component
Fault cause



Fault mode
What to check
What to do
F1
main board faulty component → bad data flash
C
heck the functionality after a
temporary power disconnection from
mains
If the component is faulty, replace it
Error
Component
Fault cause



Fault mode
What to check
What to do
F2
main board Too many on/off attempts
Temporarily power disconnection
from mains
Error
Component
Fault cause



Fault mode
What to check
What to do
F3
display
missing communication between card
boards → info missing to work
•
Check the functionality after a
temporary power disconnection
from mains
• Verify the connection between
boards
If the component is faulty, replace it
Error
Component
Fault cause



Fault mode
What to check
What to do
F4
Pro-Tech anode
water missing
→ open circuit
Verify if the water is inside
the tank
Fill the tank
damaged wirings
→ open circuit
Visual check of the component
If the component is faulty, replace it
bad connection of wirings → open circuit
Check the correct connection with the
mainboard
Place the component in the right
position
Error
Component
Fault cause



Fault mode
What to check
What to do
F5
Pro-Tech anode faulty component → short circuit
Verify with a tester that the
resistance
between terminals is not zero
If the component is faulty, replace it
Error
Component
Fault cause



Fault mode
What to check
What to do
H2
fan
fan capacitor/motor broken → break
•
Check the functionality after a
temporary ON/OFF power
disconnection
• Verify that the resistance between
terminals is between 200-500 Ω
• Verify that the resistance between
the terminals and the ground
connection of the terminal block is
more than 1 MΩ
If the component is faulty, replace it
damaged wirings
→ not working
Visual check of the component
If the component is faulty, replace it
bad connection of wirings → not working
Check the correct connection with the
mainboard
Place the component in the right
position
physical impediments to the movement of
fan blades → not working
Visual check of the component
Clean the component
blades broken
If the
component is faulty, replace it
evaporator sensor
faulty component → out of tune
Verify with a tester that the resistance
between terminals is compliant with
the “SENSOR TEST TABLE”
If the component is faulty, replace it
incorrect positioning Verify the proper positioning
Place the component in the right
position
4-way valve
faulty component → break
•
Check the functionality after a
temporary ON/OFF power
disconnection
• Verify that the resistance between
terminals is not zero or infinite
• Verify that the resistance between
the terminals and the ground
connection of the terminal block is
infinitive
If the component is faulty, replace it
damaged wirings
→ not working
Visual check of the component
If the component is faulty, replace it
bad connection of wirings → not working
Check the correct connection with the
mainboard
Place the component in the right
position