42
TRIPS - DIAGNOSTICS
Powerdrive MD2S Installation guide
4972 en - 2017.08 / d
6 - TRIPS - DIAGNOSTICS
6.1 - Safety notice
The user must not attempt to repair the drive
himself, nor perform diagnostics other than those
listed in this section. If the drive malfunctions, please
contact your local technical support.
6.2 - Alarms
Alarms may appear during drive operation.
These alarms are for information only, in order to warn the
user: the drive continues to operate but may trigger a safetrip
if no corrective action is taken.
The HMI displays a page «active trips» where «ALARM»
appears at the top of the screen. All alarms shown on the
console or the configuration interface are listed in the
following table.
On the drive control board, 2 LED displays indicate alternately
"A.L." and a number that can be used to identify the alarm
by means of the table below (this number corresponds to the
value of parameter
10.97
).
Code
No.
Meaning
A.L.
1
to
4
User alarm 1 (
10.54
)
to
User alarm 4 (
10.54
)
6
Motor overload (
10.17
)
7
Drive overtemperature (
10.18
)
8
Microcontroller overoccupancy
9
Rectifier
10
Emergency operation (see menu 20)
6.3 - Tripping on a safetrip
If the drive trips, the drive output bridge is inactive, and the
drive no longer controls the motor.
When a trip is active, the LEDs present on the control board
display alternately "t.r." and a number that can be used to
identify the active trip (see left-hand column in the table
below). For trips numbered higher than 100, only the last 2
digits are displayed with a point displayed on both LEDs to
indicate the hundred.
Example:
/
: indicates trip no. 1
/
: indicates trip no. 101
After consulting the table, follow the procedure below:
- Make sure that the drive is disabled (STO-1 and STO-2
terminals open)
- Isolate the drive power supply
- Carry out the necessary checks in order to eliminate
the reason for the trip
- Activate the STO-1 and STO-2 inputs to clear the trip
The HMI displays an active trip page, where "TRIP" appears
at the top of the screen.
All the trips indicated on the keypad or parameter-setting
interface are listed in the table below.
Opening and then closing the STO-1/STO-2 drive
enable terminals and clear the trip. If the Run FWD
or Run reverse terminal is closed at that time, the motor
may or may not start immediately, depending on the
setting of
Ctr.06
(
06.04
).
No.
Parameter-
setting interface
name
Reason for trip
Solution
1
DC UnderVolt
DC bus undervoltage
• Check the input fuses.
• Check the quality of the power supply (voltage dips).
2
DC over volt
DC bus overvoltage
• Check that the mains voltage is within the permitted
tolerance.
• Check the quality of the power supply (commutation
notches or transient overvoltages).
• Check the motor insulation.
• Check that the deceleration mode (
02.04
) is compatible
with the application.
•
If an MD2-TF option is used, check its size, its wiring and the
state of the thermal relay.
3
Over current
Overcurrent at drive output
• Check the motor insulation.
• Check the motor cables (connections and insulation).
• Check the quality of the mains supply.
• Run power diagnostics.
This trip cannot be reset for a period of 10 seconds.
