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Instruction manual GWV 76
13.3 Troubleshooting table for displayed errors
Displayed errors
Code + description Cause Measures to take Comment
S01 (blocking error)
Open circuit for
temperature sensor T
1
,
inlet to heat exchanger
Sensor is not (correctly)
connected
Connect the sensor lead to JP3 See the GWV electrical diagram (17 "Appendices")
Damaged cable or
defective sensor
Replace sensor T
1
To replace the necessary parts, you must contact your installation
engineer
S02 (blocking error)
Open circuit for sensor
1 of temperature
sensor T
2
, outlet of
heat exchanger
Sensor is not (correctly)
connected
Connect the sensor lead to JP5 See the GWV electrical diagram (17 "Appendices")
Damaged cable or
defective sensor
Replace sensor T2
(1)
To replace the necessary parts, you must contact your installation
engineer
S03 (blocking error)
Open circuit for sensor
2 of temperature
sensor T
2
, outlet of
heat exchanger
Sensor is not (correctly)
connected
Connect the sensor lead to JP5 See the GWV electrical diagram (17 "Appendices")
Damaged cable or
defective sensor
Replace sensor T2
(1)
To replace the necessary parts, you must contact your installation
engineer
S04 (blocking error)
Open circuit in
dummy 1
Dummy is not
(correctly) connected
Connect the dummy sensor (dummy sensor 1 and 2) leads to JP4. See the GWV electrical diagram (17 "Appendices")
Defective dummy Replace the dummy sensor
(1)
To replace the necessary parts, you must contact your installation
engineer
S05 (blocking error)
Open circuit in
dummy 2
Dummy is not
(correctly) connected
Connect the dummy sensor (dummy sensor 1 and 2) leads to JP4. See the GWV electrical diagram (17 "Appendices")
Defective dummy Replace the dummy sensor 2
(1)
To replace the necessary parts, you must contact your installation
engineer
S06 (blocking error)
Open circuit for
temperature sensor T
3
at the bottom of the
storage tank.
Sensor is not (correctly)
connected.
Connect the sensor lead to JP5 See the GWV electrical diagram (17 "Appendices")
Damaged cable or
defective sensor
Replace the sensor To replace the necessary parts, you must contact your installation
engineer
