Convotherm OEB Series Service Handbook page 266

Service manual OEB/OES/OGB/OGS
5.9 Troubleshooting options for the frequency converter of single-phase appliances
Frequency converter prior to 04/2008
red LED (no.40)
Description
Off Motor is still
Flashing Motor is running
Error on the frequency converter
Intermediate circuit voltage and/or mains voltage too
low or too high.
Electronics temperature outside the permitted
On range.
Motor thermoprotection not connected or outside
the permitted range.
Test the connection of the motor thermoprotection
and the mains voltage.
green LED (no.39) Description
On Communication with CM OK
No supply voltage
Mains voltage not connected or the FC was
switched on and off several times within a short
Off
time. This leads to overloading of the starting
current limitation. Therefore wait 3 minutes before
switching on again.
No connection / communication with CM
Flashing Test the connection of the serial interface to the
controller.
ALTIVAR frequency converter as of 04/2008
Information: No warm-up without an error message
i
Check if the inputs for controlling the
operation are being controlled appropriately.
When you switch on the appliance or perform a manual reset
after a fault or in response to a stop command, the motor
can only warm up again after the "right run" or "left run"
commands have been reset. Otherwise, the converter shows
"rdy" or "nSt" on display 41, but does not warm up.
Information: Operation malfunction without an error
i
message
Check on the converter clamps to see if voltage is being supplied from the mains.
Remove all connections on clamps U, V and W of the converter (check motor cable or
motor for a short-circuit between phase and earth).
Information: Error displayed
i
The cause of the fault must be resolved before you perform a reset. You can reset any
fault by turning the converter off and then on again.
In the event that the motor short-circuits, switch off the power to the frequency
converter for 5 minutes to make sure the heated electronic components in the
frequency converter cool down.
KD / 19.08.2009 5_00e_Troubleshooting list and error messages - Electronics_h.doc
39 40
41
Page 20 / 21