E Fault Codes - Vaillant geoTHERM Installation And Maintenance Instructions Manual

Code Meaning
Environment circuit
S.242 Environment circuit: Outlet temperature too low
S.246 Environment circuit: Pressure too low
S.247 Env. circuit: Fault contact: Pump open
Building circuit
S.272 Building circuit: Remaining feed heads limit active
S.273 Building circuit: Flow temperature too low
S.274 Building circuit: Pressure too low
S.275 Building circuit: Flow rate too low
S.276 Building cir.: Lockout contact S20 opened
Refrigeration circuit
S.302 High pressure switch opened
S.303 Compressor outlet temperature too high
S.304 Evaporation temperature too low
S.305 Condensation temperature too low
S.306 Evaporation temperature too high
S.308 Condensation temperature too high
S.311 Environment cir. inlet temperature too low
S.312 Building circuit inlet Return temperature too low
S.313 Environment cir. inlet temperature too high
S.314 Building circuit inlet Return temperature too high
S.315 Compressor circuit breaker open
S.316 WHB support active
S.240 Oil temperature too low
E Fault codes
Code Meaning
F.042 Sensor fault: Coding resistor 1
F.042 Sensor fault: Coding resistor 2
F.042 Sensor fault: Coding resistor 3
F.070 Invalid Device Specific Number
F.514 Temp. sensor fault: Compressor inlet
F.517 Temp. sensor fault: Compressor outlet
F.519 Sensor fault: Building circuit return temp.
F.520 Temp. sensor fault: Building circuit flow
F.532 Building circuit: Flow rate too low
0020250180_00 geoTHERM Installation and maintenance instructions
Cause
–
Sensor not connected or sensor in-
put has short-circuited
–
Replacing the control PCB and
display PCB
–
Sensor not connected or sensor in-
put has short-circuited
–
Stopcock was not opened
–
Building circuit pump defective
–
All consumers in the heating system
are closed
–
Flow rate is too low for recording
with the volume flow sensor
(< 120 l/h)
Appendix
Remedy
–
Check and, if required, replace
the sensor (see sensor charac-
teristic values in the appendix)
–
Replace the cable harness
–
Checking coding resistors 1 and
2
–
Disconnecting the product from
the power supply and switching it
back on again
–
Check and, if required, replace
the sensor (see sensor charac-
teristic values in the appendix)
–
Replace the cable harness
–
Check the stopcocks and ther-
mostatic valves
–
Ensure that there is a minimum
flow rate of 150 l/h
–
Check that the building circuit
pump functions correctly
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