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WECM / Emerald eZA Manual | 19
DANGER!
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The LED in OFF condition doesn`t mean that there is no power supply to the drive;
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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 #1 will blink in case of any fault. Table 10 indicates the blinking behavior according the fault type:
Table 10 -
Blinking periods
Fault
ON time (s)
Off time (s)
Wait / interval time (off) (s)
2
Under voltage
0,1
0,1
-
3
Over current (shor-circuit)
0,25
0,25
2
6
Over voltage
7
Over load
8
Over speed
9
Communication timeout
10
Over Temperature
11
Locked rotor
The blinking behavior according to fault type
Communication timeout fault: failure in the drive to motor communication;
Watchdog timeout fault: failure in the drive processor / software.
7.1. INFORMATION FOR CONTACTING TECHNICAL SUPPORT
For technical support and servicing, it is important to have the following information in hands:
Motor model, Batch number, and manufacturing date available in the motor nameplate (refer to item 4).
Installed software version available in the drive label (refer to item 4).
8. MAINTENANCE
DANGER!
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Before any service is performed, ensure that motor is it at standstill, disconnected from the power supply and
protected against accidental energization. Even when the motor is stopped, dangerous voltages may be present
in space heater terminals;
For motors with permanent magnet rotor (WECM and Emerald eZA), the motor assembly and disassembly require
the use of proper devices due to the attracting or repelling forces that occur between metallic parts. This work must only
be performed by a WEG Authorized service center specifically trained for such an operation. People with pacemakers
cannot handle these motors. The permanent magnets can also cause disturbances or damages to other electric
equipment and components during maintenance.
ATTENTION!
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Motor disassembly during the warranty period must be performed by a WEG authorized service center only;
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Regularly inspect the operation of the motor, according to its application, and ensure a free air flow. Inspect
the seals, the fastening bolts, the bearings, the vibration and noise levels, the drain operation, etc. The lubrication interval
is specified on the motor nameplate.
