H Comfort Protection Mode; I Fault Codes - Vaillant VWL 57/5 IS Operating, Installation And Maintenance Instructions

H Comfort protection mode
Code Meaning
200 Sensor fault: Temp. air inlet
I Fault codes
In the event of faults which are caused by components in the refrigerant circuit, inform customer service.
Code Meaning
F.022 Water pressure too low
F.042 Fault: Coding resistor
F.073 Sensor fault: Build. circ. pressure
F.514 Sensor fault: Compr. inlet temp.
F.517 Sensor fault: Compr. outlet temp.
F.519 Sensor fault: Building circuit re-
turn temp.
F.520 Sensor fault: Building circuit flow
temp.
F.526 Sensor fault: EEV outlet temp.
F.546 Sensor fault: High pressure
F.582 Fault: EEV
F.585 Sensor fault: Capac. outlet temp.
F.718 Fan unit 1: Fan blocked
F.729 Compressor outlet temperature
too low
0020257319_02 Hydraulic station Installation and maintenance instructions
Description
Still possible to operate with existing,
functional outdoor temperature sensor
Cause
–
Pressure loss in the building circuit
due to leakages or air pockets
–
Building circuit pressure sensor
defective
–
Coding resistor damaged or not set
–
The sensor is not connected or the
sensor input has short-circuited
–
The sensor is not connected or the
sensor input has short-circuited
–
The sensor is not connected or the
sensor input has short-circuited
–
The sensor is not connected or the
sensor input has short-circuited
–
The sensor is not connected or the
sensor input has short-circuited
–
The sensor is not connected or the
sensor input has short-circuited
–
Sensor not connected or sensor
input has short-circuited
–
EEV is not connected correctly or
there is a cable break to the coil
–
The sensor is not connected or the
sensor input has short-circuited
–
There is no confirmation signal stat-
ing that the fan is rotating
–
The compressor outlet temperature
is lower than 0 °C for more than 10
minutes or the compressor outlet
temperature is lower than -10 °C
even though the heat pump is in the
operating characteristics.
Appendix
Remedy
Replace the air inlet sensor
Remedy
–
Check the building circuit for leaks
–
Top up with water, purge
–
Check the quality of the plug contact
on the PCB and on the cable har-
ness
–
Check that the pressure sensor is
working correctly
–
Replace the pressure sensor
–
Check that the coding resistor is
positioned correctly and, if required,
replace it.
–
Check and, if required, replace the
sensor
–
Replace the cable harness
–
Check and, if required, replace the
sensor
–
Replace the cable harness
–
Check and, if required, replace the
sensor
–
Replace the cable harness
–
Check and, if required, replace the
sensor
–
Replace the cable harness
–
Check and, if required, replace the
sensor
–
Replace the cable harness
–
Check and, if required, replace the
sensor
–
Replace the cable harness
–
Check the sensor (e.g. using an in-
stallation aid), and replace if neces-
sary
–
Replace the cable harness
–
Check the plug connections and, if
required, replace the coil from the
EEV
–
Check and, if required, replace the
sensor
–
Replace the cable harness
–
Check the air route and, if required,
remove any blockages
–
Checking the high-pressure sensor
–
Checking that the EEV is working
correctly
–
Checking for condensate leaking
from the temperature sensor (under-
cooling)
–
Check whether the 4-port diverter
valve is in the intermediate position
–
Checking the refrigerant volume for
overfilling
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