Vaillant geoTHERM Installation And Maintenance Instructions

Appendix
36 Installation and maintenance instructions geoTHERM 0020250180_00
Code
Meaning Cause
Remedy
F.546
Sensor fault: High pressure – Sensor not connected or sensor in-
put has short-circuited
– Check and, if required, replace
the sensor (see sensor charac-
teristic values in the appendix)
– Replace the cable harness
F.583
Building circuit: Flow temperature too low – The temperature sensor in the flow is
defective
– Air in the building circuit
– Checking the building circuit's
flow rate
– Check the quality of the plug
contact on the PCB and on the
cable harness
– Check that the sensor is working
correctly (measure the resist-
ance using the sensor character-
istic values, see appendix)
– Replace the sensor
– Purging the building circuit
F.585
Sensor fault: Building EEV temp – Sensor not connected or sensor in-
put has short-circuited
– Check and, if required, replace
the sensor (see sensor charac-
teristic values in the appendix)
– Replace the cable harness
F.685
Connection error: Control not detected – The VRC 700 control was previ-
ously detected but the connection
is broken
– Check the eBUS connection to
the VRC 700 control
F.700
Temp. sensor fault: EEV environment cir. – Sensor not connected or sensor in-
put has short-circuited
– Check and, if required, replace
the sensor (see sensor charac-
teristic values in the appendix)
– Replace the cable harness
F.701
Temp. sensor fault: Environ. circuit inlet
F.702
Temp. sensor fault: Environment cir. out
F.703
Sensor fault: Low pressure
F.704
Sensor fault: Building cir. pressure
F.705
Sensor fault: Enviro. cir. pressure
F.706
Sensor fault: Building flow rate
F.710
Environment circuit: Outlet temperature too
low
– Environment circuit pump defective
– Temperature sensor for environment
circuit outlet defective
– Volume flow too low in the environ-
ment circuit
– Air in the environment circuit
– Check the environment circuit
flow rate
– Check the quality of the plug
contact on the PCB and on the
cable harness
– Check that the sensor is working
correctly (measure the resist-
ance using the sensor character-
istic values in the appendix)
– Replace the sensor
– Check the volume flow of the en-
vironment circuit pump (optimum
spread of 3 K)
– Purging the environment circuit
F.714
Environment circuit: Pressure too low – Pressure drop in the environment
circuit due to leakages or air pockets
– Environment circuit pressure sensor
defective
– Check the environment circuit for
leaks
– Top up the medium
(brine/water), purge
– Check the quality of the plug
contact on the PCB and on the
cable harness
– Check that the pressure sensor
works correctly
– Replace the pressure sensor
F.715
Environment circuit: Fault contact, pump
open
– The electronics of the high-efficiency
pump has detected a fault (e. g. dry
running, blockage, overvoltage, un-
dervoltage) and switched the pump
off as a securing measure.
– Switch the heat pump off for at
least 30 seconds (no current)
– Check the quality of the plug
contact on the PCB
– Check that the pump functions
correctly
– Purging the environment circuit

Vaillant geoTHERM Specifications

General

Brand	Vaillant
Model	geoTHERM
Category	Heat Pump
Language	English