S&C PureWave SMS-250 Operation And Maintenance page 34

Operation
34 S&C Instruction Sheet 659-520
Table 6. PureWave SMS-250 Warning Alarms—continued
Alarm
Execution Time Indicates the software is running a loop that takes longer than
Long Warning the standard 208μs
Troubleshooting Tip: Reset the alarm and contact S&C
Electric Company.
IGBT 1 Current Indicates IGBT 1 is working at its limit
Limit Troubleshooting Tip: Replace current sensor power
supply or contact S&C Electric Company.
IGBT 1 Over Indicates IGBT 1 is too hot (This alarm is used to notify the
Temperature user while still continuing operation .)
Warning Troubleshooting Tip: Check the vents at the back of the
PCS enclosure to ensure there are no air restrictions.
IGBT 1 Thermistor Indicates the IGBT 1 thermistor temperature is under -13°F
Open or Cold (-25°C) .)
Troubleshooting Tip: If the ambient air is very cold, this
alarm can be a normal condition. If the inverter is running,
the IGBTs are fine, but if this alarm occurs with an over
current alarm, contact S&C Electric Company.
IGBT 1 Thermistor Indicates the IGBT 1 thermistor is shorted, resulting in very
Shorted high temperature readings
Troubleshooting Tip: Contact S&C Electric Company.
IGBT 2 Current Indicates IGBT 2 is working at its limit
Limit Troubleshooting Tip: Replace current sensor power
supply or contact S&C Electric Company.
IGBT 2 Over Indicates IGBT 2 is too hot (This alarm is used to notify the
Temperature user while still continuing operation .)
Warning Troubleshooting Tip: Check the vents at the back of the
PCS enclosure to ensure there are no air restrictions.
IGBT 2 Thermistor Indicates the IGBT 2 thermistor temperature is under -13°F
Open or Cold (-25°C) .)
Troubleshooting Tip: If the ambient air is very cold, this
alarm can be a normal condition. If the inverter is running,
the IGBTs are fine, but if this alarm occurs with an over
current alarm, contact S&C Electric Company.
IGBT 2 Thermistor Indicates the IGBT 2 thermistor is shorted, resulting in very
Shorted high temperature readings
Troubleshooting Tip: Contact S&C Electric Company.
IGBT 3 Current Indicates IGBT 3 is working at its limit
Troubleshooting Tip: Replace current sensor power
Limit
supply or contact S&C Electric Company.
Description
TABLE CONTINUED ▶
Reset Type
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