H Maintenance Messages; I Comfort Protection Mode; J Fault Codes - Vaillant uniTOWER plus Operating Instructions Manual

H Maintenance messages
Code Meaning
M.23 Status external current anode
M.32 Building circuit: Waterpress. Low
M.200 Building circuit : Brine pressure
low
M.201 Sensor fault: Cylinder temperature
M.202 Sensor fault: System temperature
M.203 Connection fault: Disp. not recog-
nised
I Comfort protection mode
Code Meaning
200 Sensor fault: Temp. air inlet
J Fault codes
Code Meaning
F.022 Building circuit: Water press. too
low
F.042 Fault: Coding resistor
F.073 Sensor fault: Building circ. water
pressure
F.094 Fault: Vortex
F.103 Fault: Spare part ident.
F.514 Sensor fault: Compr. inlet temp.
56
Cause
–
External current anode not recog-
nised
–
Pressure loss in the building circuit
due to leakages or air pockets
–
Building circuit pressure sensor is
defective
–
Pressure loss in the building circuit
due to leakages or air pockets
–
Building circuit pressure sensor is
defective
–
Cylinder temperature sensor defect-
ive
–
System temperature sensor defective
–
Display defective
–
Display not connected
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
–
Volume flow sensor not connected or
sensor input has short-circuited
–
Incorrect control PCB installed on
the outdoor unit
–
The sensor is not connected or the
sensor input has short-circuited
Installation and maintenance instructions 0020291525_04
Remedy
–
If required, check for a cable break
–
Check the building circuit for leaks,
top up with heating water and purge
–
Check the plug contact on the PCB
and on the wiring harness; check
that the pressure sensor is working
correctly and, if required, replace the
pressure sensor
–
Check the building circuit for leaks,
top up with heating water and purge
–
Check the plug contact on the PCB
and on the wiring harness; check
that the pressure sensor is working
correctly and, if required, replace the
pressure sensor
–
Check the plug contact on the PCB
and on the wiring harness; check
that the sensor is working correctly
and, if required, replace the sensor
–
Check the plug contact on the PCB
and on the wiring harness; check
that the sensor is working correctly
and, if required, replace the sensor
–
Check the quality of the plug contact
on the PCB and on the wiring har-
ness
–
Replace the display, if required
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 wiring 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 wiring harness
–
Check and, if required, replace the
sensor
–
Replace the wiring harness
–
Installing the correct PCB
–
Check and, if required, replace the
sensor
–
Replace the wiring harness