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
