Siemens MICROMASTER 411 - Manual (Page 87)

Issue 03/01 6 Troubleshooting
MICROMASTER 411 & COMBIMASTER 411 Operating Instructions
6SE6400-5CA00-0BP0 87
6.3.2 Alarm Messages
Alarm messages are stored in parameter r2110 under their code number (e.g.
A0503 = 503) and can be read out from there.
A0501 Current Limit
Possible Causes
Motor power (P0307) does not correspond to the inverter power (P0206)
Motor leads are too long
Earth faults
Diagnose & Remedy
Check the following:
Motor power (P0307) must correspond to inverter power (r0206)
Cable length limits must not be exceeded
Motor cable and motor must have no short-circuits or earth faults
Motor parameters must match the motor in use
Value of stator resistance (P0350) must be correct
Motor must not be obstructed or overloaded
Increase the ramp-up-time.
Reduce the boost level (V/f control: P1311 & P1312, Vector control: P1610 & P1611)
A0502 Overvoltage limit
Possible Causes
Overvoltage limit is reached
This warning can occur during ramp down, if the dc-link controller is disabled (P1240 = 0)
Diagnose & Remedy
Check the following:
Supply voltage (P0210) must lie within limits indicated on rating plate
DC-link voltage controller must be enabled (P1240) and parameterized properly
Ramp-down time (P1121) must match inertia of load
Required braking power must lie within specified limits
A0503 UnderVoltage Limit
Possible Causes
Main supply failed
Main supply (P0210) and consequently DC-link voltage (r0026) below specified limit (P2172)
Diagnose & Remedy
Supply voltage (P0210) must lie within limits indicated on rating plate
Supply must not be susceptible to temporary failures or voltage reductions
Enable kinetic buffering (P1240 = 2)
A0504 Inverter OverTemperature
Possible Causes
Warning level of inverter heat-sink temperature (P0614) is exceeded, resulting in pulse frequency
reduction and/or output frequency reduction (depending on parameterization in P0610)
Diagnose & Remedy
Check the following:
Load conditions and duty cycle must be appropriate
Fan must turn when inverter is running
Pulse frequency (P1800) must be set to default value
Ambient temperature could be higher than specified for the inverter
A0505 Inverter I 2 t
Possible Causes
Warning level (P0294) exceeded, output frequency and/or pulse frequency will be reduced if
parameterized (P0290)
Diagnose & Remedy
Check the following: