Ariston 100 L Technisches Handbuch - Seite 31
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Error
Component
gas R134a
evaporator
air sensor
evaporator sensor
H3
4-way valve
compressor
Error
Component
evaporator
air sensor
H4
evaporator sensor
Fault cause
Fault mode
gas is missing
due to ice, leafs, dirt → clogged
faulty component → out of tune
incorrect positioning
faulty component → out of tune
incorrect positioning
faulty component → break
damaged wirings → not working
bad connection of wirings → not working
incorrect positioning
broken due to:
wear
•
safety thermostat broken (short
•
circuit)
inlet refrigerant in liquid phase due
•
to high quantity of refrigerant
over pressure due to broken
•
pressure switch (short circuit)
Not working due to:
pressure switch broken (open
•
circuit)
damaged wirings
•
bad connection of wirings
•
motor capacitor broken
•
Fault cause
Fault mode
due to ice, leafs, dirt → clogged
faulty component → out of tune
incorrect positioning
faulty component → out of tune
incorrect positioning
What to check
Check the refrigerant connection
•
between units and the circuit of
the external unit using a leak
detector.
Check that the pressure inside the
•
circuit have to be more than 3 bar
(using "service" connector on the
external unit)
For more accurate measure, do
•
the * LOW GAS CHECKING at the
end of this paragraph
Visual check of the component
Verify with a tester that the resistance
between terminals is compliant with
the "SENSOR TEST TABLE"
Verify the proper positioning
Verify with a tester that the resistance
between terminals is compliant with
the "SENSOR TEST TABLE"
Verify the proper positioning
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
Visual check of the component
Check the correct connection with the
mainboard
Verify the proper positioning
Check the functionality after a
•
temporary power disconnection
Verify that the resistance between
•
terminals is in compliance with
the relative table value
Verify that the resistance between
•
the terminals and the external
unit casing is not zero
Pressure switch: verify with a
•
tester that the resistance between
terminals is infinite even if the
circuit pressure is ok
Visual check of the wirings and
•
check the connection with the
mainboard
Motor capacitor: verify with a
•
tester that the resistance between
terminals is not zero
What to check
Visual check of the component
Verify with a tester that the resistance
between terminals is compliant with
the "SENSOR TEST TABLE"
Verify the proper positioning
Verify with a tester that the resistance
between terminals is compliant with
the "SENSOR TEST TABLE"
Verify the proper positioning
31
What to do
Make a gas recharge and check the
refrigerant connection between units
and the circuit of the external unit
using a leak detector.
If a component is faulty, replace it.
Empty the circuit, make the vacuum
and a new charge in accordance with
the quantity indicated on the external
unit technical label.
Clean the component
If the component is faulty, replace it
Place the component in the right
position
If the component is faulty, replace it
Place the component in the right
position
If the component is faulty, replace it
If the component is faulty, replace it
Place the component in the right
position
Place the component in the right
position
If the component is faulty, replace it
If a component is faulty, replace it;
Make connections in the right way
What to do
Clean the component
If the component is faulty, replace it
Place the component in the right
position
If the component is faulty, replace it
Place the component in the right
position