Siemens 440 - Manual (Page 309)

Issue 01/06 Faults and Alarms
MICROMASTER 440 Parameter List
6SE6400-5BB00-0BP0
309
F0015 No motor temperature signal STOP II
Quit
Refer to F0001
Cause
- motor temperature sensor either short-circuited or open-circuit.
- if it is identified that a signal has been lost, then the temperature monitoring changes-over to monitoring
based on the thermal-motor model.
F0020 Line supply phase missing STOP II
Quit
Refer to F0001
Cause
- a fault is output if one of the three input phases is missing, the pulses are enabled and a load is present
Diagnosis & Remedy
Please check the following:
-
are the power connections ok ?
F0021 Ground fault STOP II
Quit
Refer to F0001
Cause
- the fault occurs if the sum of the phase currents is greater than 5 % of the inverter rated current.
NOTE
-
this fault only occurs for inverters with 3 current sensors (sizes D to F, GX, FX).
Diagnosis & Remedy
Please check the following:
-
are the connections at the motor terminal boxes o.k. ?
- are the motor cable connections at the inverter o.k. ?
F0022 Hardware monitoring active STOP II
Quit
Refer to F0001
Cause
This fault (r0947 = 22 and r0949 = 1) occurs under the following circumstances:
(1) DC link overcurrent condition = IGBT short-circuit
(2) Braking chopper short-circuit
(3) Ground fault
(4) I/O module not correctly inserted
For the following sizes the above faults can occur:
-
size A to C (1),(2),(3),(4)
- size D to E (1),(2), (4)
- size F (1),(2)
The following faults only occur in conjunction with sizes FX / GX:
-
UCE faults are identified if r0947 = 22 and the fault value r0949 = 12 or 13 or 14.
- I2C bus error is identified if r0947 = 22 and the fault value r0949 = 21 (power-down and then power-up
again).
NOTE
All of these faults are assigned to a signal in the power module. This means that it is not possible to
determine which fault actually occurred.
Diagnosis & Remedy
You must first identify as to whether the fault is permanent (i.e. the inverter cannot be started without the
fault occurring) or it sporadically occurs (occasionally occurs or under certain operating conditions).
Permanent fault F0022:
-
check whether the I/O module is correctly inserted (refer to the Operating Instructions).
- is there a ground fault or short-circuit at the inverter output or at an IGBT?
You can identify this by disconnecting the motor cable.
In the case that the fault occurs, if all of the external cables (with the exception from the line supply
voltage) are disconnected, then with a high degree of probability, the drive unit is defective and must be
repaired.
Sporadic fault F0022:
-
this fault should be treated as "overcurrent". If fault F0022 sporadically occurs, the causes can be as
follows:
- sudden load changes or mechanical obstructions
- extremely short ramp-up times (accelerating times)
- poor optimization of the sensorless closed-loop vector control
- incorrect braking resistor is installed with an excessively low resistance