Operating instructions

58
Table 42 — Siemens Low Ambient Temperature Controller Alarm Messages
LEGEND
FAULT POSSIBLE CAUSES TROUBLESHOOTING
A0501
Current Limit
• Motor power does not correspond to the
drive power
• Motor leads are too short
• Ground fault
1. Check whether the motor power corresponds to the drive power
2. Check that the cable length limits have not been exceeded
3. Check motor cable and motor for short-circuits and ground faults
4. Check whether the motor parameters correspond with the motor being used
5. Check the stator resistance
6. Increase the ramp-up-time
7. Reduce the boost
8. Check whether the motor is obstructed or overloaded
A0502
Overvoltage Limit
• Mains supply too high
• Load regenerative
• Ramp-down time too short
1. Check that mains supply voltage is within allowable range
2. Increase ramp down times
NOTE: If the vdc-max controller is active, ramp-down times will be automatically
increased
A0503
Undervoltage Limit
• Mains supply too low
• Short mains interruption
Check main supply voltage (P0210)
A0504
Drive
Overtemperature
Warning level of inverter heat-sink temperature
(P0614) is exceeded, resulting in pulse fre-
quency reduction and/or output frequency
reduction (depending on parameters set
(P0610)
1. Check if ambient temperature is within specified limits
2. Check load conditions and duty cycle
3. Check if fan is turning when drive is running
A0505
Drive I
2
t
Warning level is exceeded; current will be
reduced if parameters set (P0610 = 1)
Check if duty cycle is within specified limits
A0506
Drive Duty Cycle
Heatsink temperature and thermal junction
model are outside of allowable range
Check if duty cycle is within specified limits
A0511
Motor
Overtemperature I
2
t
Motor overloaded Check the following:
1. P0611 (motor I
2
t time constant) should be set to appropriate value
2. P0614 (motor I
2
t overload warning level) should be set to suitable level
3. Are long periods of operation at low speed occurring
4. Check that boost settings are not too high
A0541
Motor Data
Identification Active
Motor data identification (P1910) selected or
running
Wait until motor identification is finished
A0600
RTOS Overrun Warning
Software error —
I
2
t—Current Squared Time
RTOS — Run Time Operating System
RUN
PRG
MON
%
Hz
MODE
Loc
Rem
ENT
RUN STOP
13
1
2
3
6
7
4
5
9
10
11
14
12
8
Fig. 37 — Schnieder Altivar 21 VFD Display Panel
CALL
OUT
LED/KEY DESCRIPTION
1
Display
RUN LED
Illuminates when a run command is applied to the drive
controller. Flashes when a speed reference is present
with the run command.
2
Display
PRG LED
Illuminates when Programming mode is active. Flashes
when -GrU menus are active.
3
Display
MON LED
Illuminates when Monitoring mode is active. Flashes in
fault record display mode.
4
Display
Unit
4 digits, 7 segments
5
Display
Unit LED
The % LED illuminates when a displayed numeric
value is a percentage. The Hz LED illuminates when a
displayed numeric value is in hertz.
6
Up/Down
arrows
Depending on the mode, use the arrows to: navigate
between the menus, change a value, or change the
speed reference when Up/Down LED (7) is lit.
7
Up/Down
LED
Illuminates when the Up/Down arrows are controlling
the speed reference.
8
Loc/Rem
LED
Illuminates when Local mode is selected.
CALL
OUT
LED/KEY DESCRIPTION
9
MODE Press to select the Keypad mode. Modes are: Run
mode (default on power-up), Programming mode, and
Monitoring mode. Can also be used to go back to the
previous menu.
10 Loc/Rem Switches between Local and Remote modes.
11
ENT Press to display a parameter’s value or to save a
changed value.
12 RUN LED Illuminates when the Run key is enabled.
13
RUN Pressing this key when the RUN LED is illuminated
starts the drive controller.
14
STOP Stop/reset key. In Local mode, pressing the STOP key
causes the drive controller to stop based on the setting
of parameter F721. In Remote mode, pressing the
STOP key causes the drive controller to stop based on
the setting of parameter F603. The display will indicate
a flashing “E”. If F735 is set to 0 (default setting), press-
ing the stop key twice will reset all resettable faults if
the fault condition has been resolved.