343

Possible Causes

• •Attempt to save a trim by using either InPower or the LCD display is not successful
• •Calibration Checksum Warning (Fault Code 2416) is active
• •Control switch operation is not OK
• •EEPROM Write Failure Warning (Fault Code 353) is active
• •Faulty cabling from the switches to the terminal blocks
• •Generator Bus AC Metering Failure (Fault Code 1335) is active
• •Misoperation of relevant terminal blocks (TB10-6) on the SYNC1320 master synchronizer and related switches
• •The SYNC1320 master synchronizer fails to automatically save data on a periodic basis
• •The current value in RAM memory (to-be-written value) does not match its post-written value in EEPROM
• •The hardware version is not compatible with the software version
• •Utility Bus AC Metering Failure (Fault Code 1335) is active

Suggested Actions

1. 1Check cabling from the switches to the terminal blocks
2. 2Check relevant terminal blocks (TB10-6) on the SYNC1320 master synchronizer and related switches for misoperation
3. 3Clear the fault by cycling power to the SYNC1320 master synchronizer
4. 4Clear the fault by resetting the processor via an InPower initial calibration
5. 5Cycle power to the SYNC1320 master synchronizer
6. 6Identify which of the faults is active by observing the fault displayed on the control panel or observing the lamps on the SYNC1320 control board, or by using InPower
7. 7If the problem continues, replace the control board
8. 8Make sure the control switch operation is OK
9. 9Take corrective steps for the active specific faults
10. 10Verify if working in non-Auto mode is intentional

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