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TROUBLESHOOTING E52 FAULT
WHAT IS AN E52 FAULT - An E52 fault is a speed deviation fault. The encoder detected speed deviated from the output commanded
set-
HOW IS AN E52 FAULT DETERMINED – When the VFD is operating in closed loop vector control only (AA121 = 10) the VFD is
tes outside of the allowable value bb-83 for the allowable time bb-84 then a speed deviation is
determined to have occurred.
• and the encoder tether is secure.
• e sure to check for correct encoder signal phasing. Try switching sig A with sig B.
• If the fault is occurring at start you will need to determine if the encoder is working. To do this remove the encoder from the
-
encoder s
parameter dA-
• If a load is stuck in the air, you can change the VFD control mode to open loop SLV AA121 = 08 for the purpose of lowering
the load. DO NOT
disabled.
• If this fault is occurring at random check to make sure the motor brake circuit is not dropping out randomly. Check to see if
the encoder signal in unstable by using dA-08 detected speed monitor, this value while run should be close to the set-
-08 is + / -
• Contact Detroit Hoist for further assistance.
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