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TCM with code 51

Number of messages: 3

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mrfixit
New York, United States

I have a FCB30E3 AH72H00524 when the key is turned on, code 51. It has a transistor type EV100. Nothing turns on, the pos. contactor doesn't close. Thanks for any help.

Posted 9 Jun 2009 11:07 PM

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controlelectric
Shropshire, United Kingdom

Error code 51 is Capacitor C1 does not charge on start up.

Indication of fault. Line contactor L does not close

Possible Cause
Capacitor bank has a problem(the 3 big blue capacitors on the power block)
Check the capacitor bank for a bad capacitor(short circuit or low resistance). the capacitor bank is charged through a resistor during start up (the precharge resistor is mounted across the line contactor, check the resistor for open circuit). If the capacitor does not charge correctly, the resistor becomes hot. The control card checks the temperature of the resistor and if the resistor becomes too hot the control card stops the start up.

If many start ups are made during troubleshooting the resistor becomes too hot and the status code 51 will occur

NOTE: This status code -51 will often occur instead of
-151 when the fault is in the hydraulic pump controller. A fault in the hydraulic controller capacitor bank can be displayed as a fault in the traction controller capacitor bank (check both capacitor banks) as a -51 code will often be displayed before a -151

Check for open or loose connections in the capacitor bank.

Check for open control fuse

Replace control card

Hope this helps?
Shane

-------------------------
controlelectrics.uk@gmail.com

Posted 10 Jun 2009 05:51 PM

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mrfixit
New York, United States

The capacitor bank checked out ok. I pulled the battery out because they over filled it and it overflowed when charged. It had a couple poor cable connections on the drive motor and fixed them. Cleaned and wiped down the battery and the plastic tray that fits under it. That seemed to solve the problem. Thanks for the info on code 51.

Posted 11 Jun 2009 07:04 AM

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