Vaillant aroSTOR VWL B 270/5, Инструкция по установке и обслуживанию

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8000015884_00 Installation and maintenance instructions
79
B Annual inspection and maintenance work
–
Overview
No. Work
1
Check that the safety devices are functioning properly.
2
Check the refrigerant circuit for leak-tightness.
3 Check the hydraulic circuit for leak-tightness.
4 Check that the safety assembly is working properly.
5
Check whether the components of the refrigerant circuit show any signs of rust or traces of oil.
6
Check the unit's components for wear.
7
Check whether the unit's components are defective.
8
Check that the cables are securely seated on the connection terminals.
9 Check the electrical installation in accordance with the applicable standards and regulations.
10
Check the product's earthing.
11
Check the evaporator for ice formation.
12 Remove the dust from power supply connections.
13
Clean the evaporator carefully to avoid damaging the fins. Ensure that air circulation through the entire circuit, including
the air intake, is not impeded.
14 Check that the fan runs freely and is clean.
15 Check whether the condensate drains off without any problems.
16 Check the scale deposition on the immersion heater. If the layer of limescale is thicker than 5 mm, you must replace the
immersion heater.
17
Record the inspection/maintenance work carried out.
C Fault messages
–
Overview
Fault code Description Possible cause Solution Temporary operation
buS
–
PCB defective
–
Bus connection to the
display is faulty
–
Display defective
–
Overvoltage in the
power grid
–
Cabling fault in the
power supply connec-
tion (low-tariff contact
or external fan control
system)
–
Damage during trans-
port
–
Replacing the PCB
–
Replacing the display
PCB
–
Replacing the display
connection cable
Product decommissioned.
T_AI R Air temperature sensor
defective (extracted air)
–
Sensor defective
–
Sensor not connected
to the PCB
–
Sensor cable damaged
Replace the sensor Heat pump decommis-
sioned.
The selected back-up
heater keeps the water
temperature at 38 °C.
T_DE FROST Evaporator temperature
sensor defective
(Defrosting temperature)
–
Sensor defective
–
Sensor not connected
to the PCB
–
Sensor cable damaged
Replace the sensor Heat pump decommis-
sioned.
The selected back-up
heater keeps the water
temperature at 38 °C.
T_WA TER Water temperature sensor
defective
–
Sensor defective
–
Sensor not connected
to the PCB
–
Sensor cable damaged
Replace the sensor Heat pump decommis-
sioned.
CLOC K Time
–
Overvoltage in the
power grid
–
Damage during trans-
port
–
Replacing the display
PCB
–
Replacing the display
connection cable
Operating times are no
longer considered:
Target temperature for do-
mestic hot water is per-
manently maintained (no
signal on connection plug
numbers 1 and 2).