Vaillant aroSTOR VWL B 270/5 Instrucciones De Instalación Y Mantenimiento página 81

Fault code Description
Incorrect temperature
sensor readings
PV MODE
Incorrect defrosting sensor
readings
Heat pump out of gas
Expansion valve decom-
missioned
Compressor decommis-
sioned and safety cut-out
activated
PV ECO Incorrect temperature
sensor readings
PV MAX Incorrect temperature
sensor readings
T°PV ECO Incorrect defrosting and hot
water temperature sensor
readings
ERR. 08 Incorrect measurements by
the defrosting sensor
EPrO Display card has a storage
problem
8000015884_00 Installation and maintenance instructions
Possible cause
–
The air temperature
sensor and the defrost-
ing sensor have been
inverted on the PCB
–
The defrosting sensor
and the water temper-
ature sensor have been
inverted on the PCB
–
The defrosting sensor
is connected to the
air connection plug.
The air temperature
sensor is connected to
the water connection
plug and the water
temperature sensor
is connected to the
defrosting connection
plug
Defrosting sensor incor-
rectly installed on the pipe.
Air temperature is meas-
ured
Leak in the cooling circuit
Break in the copper pipe
for the expansion valve fol-
lowing interference or due
to contact with a vibrating
component.
Compressor defective
–
The air temperature
and the water temper-
ature sensors have
been inverted on the
PCB.
–
The defrosting sensor
is connected on the
water connection plug.
The water temperature
sensor is connected to
the air connection plug,
and the air temperature
sensor is connected to
the defrosting connec-
tion plug.
The defrosting sensor is
connected on the water
connection plug. The water
temperature sensor is con-
nected to the air connec-
tion plug, and the air tem-
perature sensor is connec-
ted to the defrosting con-
nection plug.
The defrosting sensor and
the water temperature
sensor have been inverted
on the PCB.
The defrosting sensor is
defective.
–
Display card is dam-
aged
–
Display connection
cable is damaged
Solution
Connecting the temper-
ature sensors to the PCB
correctly
Re-establishing contact
between the defrosting
sensor and the pipe
Finding and repairing the
leak before filling the cool-
ing circuit
Replacing the expansion
valve
Replacing the compressor
Connecting sensors to the
PCB correctly
Connecting sensors to the
PCB correctly
Connecting sensors to the
PCB correctly
Replace the sensor
–
Replacing the display
card
–
Replacing the display
connection cable
Temporary operation
Heat pump decommis-
sioned.
Product decommissioned.
Product decommissioned.
Heat pump decommis-
sioned.
The product works in al-
ternating operation with the
heat pump.
Product decommissioned.
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