WEG WECM-AL80-85A2 Installation, Operation And Maintenance Manual page 18

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7. PRODUCT PROTECTIONS AND FAULT DIAGNOSIS
WECM / Emerald eZA products have many incorporated electronic protections:
Input under voltage protection;
g
Locked rotor protection;
g
Overload protection;
g
Over temperature protection.
g
Output overcurrent / short-circuit protection;
g
WECM / Emerald eZA products have a LED in the opening on the back side that indicate the solu-
tion status and to help in the fault diagnosis:
The LED will stay ON while the motor is running (speed bigger than zero);
The LED will stay OFF while the motor is stopped (speed equals to zero);
g
DANGER!
The LED in OFF condition doesn`t mean that there is no power supply to the drive;
Make sure that the input power supply is disconnected before do any maintenance
in the product.
If the Fire Mode function is active, the failures will be detected, but ignored by
WECM / Emerald eZA, i.e., will not block the IGBTs. If the motor was spinning, will
continue spinning. For more information see item 6.5.
The LED will blink in case of any fault. The below table indicates the blinking behavior according the
fault type:
Blinking Fault
periods description time
2
Under
(Fast 0.1 0.1
Voltage
flash)
Overload /
3
Over current
0.25 0.25
IPM
5 Temperature
Limitation
6 Overvoltage
18 | WECM / Emerald eZA Manual
Wait
ON Off
interval
time
time (off)
- Voltage supply lower than
nameplate limitation;
- Input power cable
-
Connection problem;
- Hardware problem
(Contact WEG)
- Load used over the motor
maximum value;
- Higher Ambient
temperature than limitation;
2
- High Ambient temperature
or lower cooling conditions
than the minimum.
(See user manual)
-Voltage supply higher than
specified in the nameplate;
Table 10 - The blinking behavior according to fault type
Probable Causes
- Check the power
supply voltage;
- Check the input power
cable connection;
- Check the real load
application (Measure
current from drive to
motor*2);
- Measure the ambient
conditions (temperature
and air over the motor);
- Wait temperature
recovery
- Consult WEG if this
problem persists;
- Waiting power supplier
recovered;
Solution Fault Recovery
Recovers
automatically after
power supply
recovers;
Recovers
automatically
after conditions
are back to
specification
Recovers
automatically after
temperature gets
lower than the
limitation
Recovers
automatically after
power supply
recovers;
Modbus
code
Error*3
0x01
0x03
0x04
0x02