Error Diagnosis 4. Error diagnosis KEB COMBIVERT Error messages are represented with an E.xxx

/library/KEB_CD/manuals/f5/f5s/00f5subk250.pdf\nError Diagnosis
4. Error diagnosis KEB COMBIVERT Error messages are represented with an E.xxx
error code in the display. Immediate voltage supply to the motor is turned
off. Restart is possible only after resetting the fault.
Malfunctions are represented with an A.xxx error code in the display.
Responses can vary depending on the programmed condition. The Val
column displays the numeric message value, if read via serial
communication bus.
Display COMBIVIS software display Val Description and causes
E. OP ERROR over potential Error: Over voltage (DC-bus circuit)
Occurs, if DC-bus voltage rises above the permissible value
( V units: VDC and for V units: VDC):
• Poor control adjustment (over shooting)
• Input voltage spikes, too high or interference voltages.
• Deceleration ramps too short
• Braking resistor damaged, undersized or not connected
• PF correction capacitor switching at substation
E. UP ERROR under potential Error: Undervoltage (DC-bus circuit).
Occurs, if DC-bus voltage falls below the permissible value.
( V units: VDC and for V units: VDC):
• Input voltage too low, unstable or wire gauge too small.
• Inverter sized too small for given application.
• Supply voltage drops intermittently via generator / transformer.
• Missing input phase or input not connected properly.
• Connection to an unbalanced supply (i.e. corner ground delta).
• Separate control power supply and switched off power circuit.
E. OC ERROR over current Error: Over current > Occurs, if peak current is exceeded:
• Accel. or decel. time too short and /or the load is too big.
• Short-circuit and/or ground fault at the output.
• Motor larger than recommended for inverter size.
• Motor cable too long and /or EMC problems.
• Hz V motor running on inverter connected to V.
• Motor rated frequency (CP.13) not adjusted correctly.
E.OHI ERROR over heat internal Error: Over heating in the interior: error can only be reset at
E.nOHI, if the interior temperature has fallen by at least 3°C
E.nOHI no ERROR over heat int. No longer over heating in the interior E.OHI, interior tempera-
ture has fallen by at least 3°C
E. OH ERROR over heat pow.mod. Error: Over temperature of power module. Reset error at
E.nOH:
• Insufficient air flow at the heat sink (dirty).
• Ambient temperature high or fan clogged or not functioning.
E.dOH ERROR drive over heat Error: Over temperature signal from motor temperature sensor.
Reset at E.ndOH, when sensor resistance decreases:
• Terminals T1, T2; resistance > Ohm or jumper wire loose.
• Motor over loaded, see also E.OC and E.OL.
• Temperature sensor or cable breakage.
E.nEd no ERROR detected No defined error recognized (should not occur)
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