SCPC System • Error messages and error diagnosis
CP_SEM_60-03-00.002 43
5.1.3 Current sensor
The current sensor is a critical part of the battery monitoring function. The previous section mentioned
various error numbers which indicate an error in the current sensor. In principle a fault in the current
sensor may occur if a current of over 5 A has been flowing for an extended period (e.g. during/after a
total discharge). In this case, observe the offset of the current sensor in the Service menu. If this is
continually fluctuating or is constantly over 100 mA, the current sensor is faulty. The nominal value for
the current sensor offset is a value M ± 70 mA. In the event of a fault:
◗ Replace the Mains monitoring (ZNU) circuit board
◗ Calibrate the current sensor (see Chap. 4.2.3 on page 4.36)
If this measure does not resolve the error:
◗ Replace the Battery monitoring (ZAU) circuit board
◗ Calibrate the current sensor (see Chap. 4.2.3 on page 4.36)
◗ Perform a battery test
If this measure also does not produce the desired result:
◗ Replace the batteries
◗ Calibrate the current sensor (see Chap. 4.2.3 on page 4.36)
◗ Perform a battery test
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