WEG WECM-AL80-85A2 User manual

Installation, Operation and
Maintenance Manual
WECM / Emerald eZA

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Read carefully this manual before installing and
configuring the equipment
The objective of this manual is to provide important information, which must be consid-
ered during the shipment, storage, installation, operation and maintenance of WEG motors.
Therefore, we advise to make a careful and detailed study of the instructions contained herein
before performing any procedures on the motor. The noncompliance with the instructions
informed in this manual and others mentioned on the website www.weg.net voids the product
warranty and may cause serious personal injuries and material damages. For further informa-
tion or explanations, check our FAQ at www.weg.net/br/faq.
The instructions presented in this document are valid for WECM / Emerald eZA products.

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1. GENERAL INFORMATION
WECM / Emerald eZA product is an Electronically Commutated Motor composed by a permanent
magnet motor and a drive with features customized for commercial ventilation solutions.
This Manual contains only the required information that allows qualified and trained personnel to
carry out their services. The product images are shown for illustrative purpose only.
1.1. WARNINGS IN THIS MANUAL
DANGER!
The procedures recommended in this warning have the purpose of protecting the user
against death, serious injuries and considerable material damage.
ATTENTION!
The procedures recommended in this warning have the purpose of avoiding material
damage.
NOTE!
The information mentioned in this warning is important for the proper understanding
and good operation of the product.
2. SAFETY MEASURES
Only trained personnel, with proper qualifications, and familiar with this kind of equipment and asso-
ciated machinery shall plan and implement the installation, starting, operation and maintenance of
this equipment. The personnel shall follow all the safety instructions described in this manual and/or
defined by the local regulations.
ATTENTION!
Any service on the internal parts of the motor must be performed by qualified personnel
only, since, due to the attraction between metallic parts caused by the magnets, risk of
accident is present both in the assembly and disassembly of the motor.
DANGER!
Contains permanent magnets. For pacemaker users, it is recommended to avoid close
or prolonged contact with this product, as it may interfere with the proper operation of
the device.
DANGER!
Always disconnect the main power supply before touching any electrical device
associated with the product. Several components may remain charged with high voltage
and/or in movement and may cause injuries to people, even after the AC power supply
has been disconnected or turned off. Wait at least 10 minutes to guarantee the fully
discharge of capacitors. Always connect the equipment to the ground protection (PE).

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3. SHIPMENT, STORAGE AND HANDLING
Check the conditions of the motor immediately upon receipt. Where any damage is noticed, this
must be reported in writing to the transportation company, and immediately communicated to the
insurance company and to WEG. In this case, no installation job can be started before the detected
problem has been solved.
Check if the nameplate data matches the invoice data and the environmental conditions in which the
motor will be installed. If the motor is not immediately installed, it must be stored in a clean and dry
room protected against dust, vibrations, gases and corrosive agents, and with relative humidity not
exceeding 60%.
If the motors are stored for more than two years, it is recommended to change the bearings, or to
remove, wash, inspect and relubricate them before the motor is started.
DANGER!
gAlways handle the motor carefully in order to prevent personal injuries and impacts
that could damage the bearings.
gDo not lift and/or carry the product holding by the input cables.
gWhen available, use only the eyebolts to lift the motor. However these eyebolts are
designed for the motor weight only. Thus never use these eyebolts to lift the motor
with additional loads coupled to it. For multimounting motors (with removable feet/
base), the eyebolts must be positioned according to the motor mounting position so
that the lifting angle is vertically aligned (lifting at 0°).
gAdditional information regarding the maximum allowable angle-of-inclination is indi-
cated in the general manual available on the website www.weg.net.
4. IDENTIFICATION LABELS
There is one nameplate with general product information on the WECM / Emerald eZA product
that is affixed to the side of the motor frame and one label with basic electronic information that is
affixed to the drive (back cover).
Figure 1 - Drive label

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Figure 2 - USA/Canada market motor nameplate
Figure 3 - Motor nameplate

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5. INSTALLATION
DANGER!
gMake sure the AC power supply is disconnected and protected against acciden-
tal energization before starting the installation;
gCheck the motor direction of rotation, turning it without load before it is coupled
to the load;
gTo prevent accidents, ensure that the grounding connection has been performed
according to the applicable standards and that the shaft key has been securely
fastened before the motor is started;
gDo not lift and/or carry the product holding by the input cables.
Motors must be only installed in places compatible with their mounting features and in applications
and environments for which they are intended.
Those motors with feet must be installed on bases duly planned in order to prevent vibrations and
assure perfect alignment. The motor shaft must be properly aligned with the shaft of the driven
machine. Incorrect alignment, as well as improper belt tension, will certainly damage the bearings,
resulting in excessive vibrations and even causing the shaft to rupture. The admissible shaft radial
and axial loads for standard bearings are specified on the table below. Use flexible coupling when-
ever possible.
Maximum permissible thrust - Fr in (kN) 26280 hours
Direction Mounting
position Type 1500rpm 1800rpm 3000rpm
Force (kN) Force (kN) Force (kN)
Axial*
Horizontal Pushing 0.31 0,29 0.25
Pulling 0.17 0.16 0.12
Vertical shaft
down
Pushing 0.35 0.33 0.27
Pulling 0.14 0.14 0.10
Vertical shaft
up
Pushing 0.27 0.27 0.23
Pulling 0.23 0.20 0.15
Radial** All L 0.11 0.11 0.12
L/2 0.19 0.19 0.16
Table 1 - Allowed loads for Emerald eZA (NEMA 48) motors

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ATTENTION!
gThe air used for cooling the motor must be at ambient temperature, limited to the
temperature indicated on the motor nameplate;
gTake the required measures in order to ensure the degree of protection indicated on
the motor nameplate:
Unused cable inlet holes in the terminal boxes must be properly closed with
blanking plugs;
The cable entries used must be fitted with components, such as, cable glands
and conduits;
Components supplied loose (for example, terminal boxes mounted separately)
must be properly closed and sealed;
Fixing elements mounted in the threaded through holes in the motor enclosure
(for example, the flange) must be properly sealed.
gFor flying leads motors, do not push the overlength of leads into the motor in order to
prevent that they touch the rotor.
Table 2 - Allowed loads for WECM (IEC 80) motors, according maximum speed
Notes:
* Axial max. load (radial zero).
** Radial max load (axial zero).
1 - All belt loads are considered to act in vertically downward direction.
2 - Overhung loads include belt tension and weight of sheave.
3 - Overhung load limits do not include any effect of unbalanced magnetic pull.
Only remove the corrosion protection grease from the shaft end and flange immediately before the
motor installation.
Unless specified otherwise in the purchase order, WEG motors are dynamically balanced with “half
key” and without load (uncoupled).
The driving elements, such as pulleys, couplings, etc., must be balanced with “half key” before they
are mounted on the shaft of the motors.
Maximum permissible thrust - Fr in (kN) 20000 hours
Direction Mounting
position Type 1500rpm 1800rpm 3000rpm
Force (kN) Force (kN) Force (kN)
Axial*
Horizontal Pushing 0.90 0.86 0.74
Pulling 0.50 0.46 0.34
Vertical shaft
down
Pushing 0.96 0.91 0.77
Pulling 0.47 0.44 0.33
Vertical shaft
up
Pushing 0.87 0.84 0.73
Pulling 0.56 0.51 0.37
Radial** All L 0.66 0.61 0.49
L/2 0.74 0.69 0.56

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Drain hole: WECM / Emerald product can be supplied with drains. Below pictures give details about
the mounting configuration.
Figure 4 - Drain position Figure 5 - Drain sectional
ATTENTION!
gThe motor must always be positioned so the drain hole is at the lowest position;
Slinger: WECM / Emerald product in vertical shaft up mounting should be fitted with water slinger
ring to prevent water ingress inside the motor. Consult WEG about this optional.
ATTENTION!
Motors installed outdoors or in the vertical position require the use of additional shelter
to protect them from water.
Allowed inertias for WECM frames IEC80 single phase, according to output power and speed:
Power (kW) 1500rpm (kgm²) 1800rpm (kgm²) 3000rpm (kgm²)
0.12 0.05 0.05 0.05
0.18 0.05 0.05 0.05
0.25 0.05 0.05 0.05
0.37 0.05 0.05 0.05
0.55 0.05 0.05 0.05
0.75 0.05 0.05 0.05
1.10 0.05 0.05 0.05
Table 3 - Inertias allowed for single phase line

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5.1. POWER CONNECTIONS
DANGER!
Connect the motor properly to the power supply by means of safe and permanent
contacts, always considering the data informed on the nameplate, such as rated
voltage, wiring diagram, etc.
DANGER!
gMake sure the jumper terminals in power cable are insulated to avoid electrical
shock.
gSHOCK RISK! Do not touch the jumper terminals after the product is fed.
gAlways connect the equipment to the ground protection (PE).
ATTENTION!
g
The power supply that feeds the inverter shall have a solid grounded neutral.
5.2. CONTROL CONNECTIONS
gMake the control connections according nameplate indication.
ATTENTION!
Make sure that all unused conductors in control cable are insulated to avoid product
damage.
For power cables, switching and protection devices dimensioning, consider the rated motor current,
the service factor, and the cable length, among others. For motors without terminal block, insulate
the motor terminal cables by using insulating materials that are compatible with the insulation class
informed on the nameplate. The minimum insulation distance between the non-insulated live parts
themselves and between live parts and the grounding must meet the applicable standards and
regulations for each country.
gInput voltage selection (if available):
 Interconnect the jumper leads to an 115V input voltage;
 Keep the jumper leads disconnected to 208V or higher input voltage (according nameplate
indication);
gMake the line, neutral and ground connections according nameplate indication;
g If used, connect the optional external harmonic filter (passive PFC) in series to the line conduc-
tor, according to Item 6.6 - PASSIVE POWER FACTOR CORRECTION (PFC) (OPTIONAL).
WEG declares that the WECM / Emerald eZA motor line is intended to be used as a part of an
end-product and thus is not an independently used machine. All cables of this product need to be
internally installed into the enclosure of the final product.

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NOTE!
The end user takes personal responsibility for the EMC compliance of the whole installation.
6. OPERATION INSTRUCTIONS
DANGER!
During operation, do not touch the non-insulated energized parts and never touch or stay
too close to rotating parts.
The rated performance values and the operating conditions are specified on the motor nameplate.
The voltage and frequency variations of the power supply should never exceed the limits
established in the applicable standards.
Occasional different behavior during the normal operation (actuation of thermal protections, noise
level, vibration level, temperature and current increase) must always be assessed by qualified
personnel. In case of doubt, turn off the motor immediately and contact the nearest WEG service
center.
Power Conducted Radiated
≤0,55kW Class C2 Class C2
0,75kW - 1,1kW Class C2 Class C2
5.3. EMC REQUIREMENTS FOR CONFORMING INSTALLATIONS
The standard WECM / Emerald eZA mounting solution (Drive attached to the motor) comply with
the IEC 61800-3 / FCC requirements with the corresponding categories as per the Table 5.1 below.
Decentralized motor with external Filter (motor cable length≤3meters)
Power Conducted Radiated Notes
≤0.55kW C2 C2
(1)Filter is FT121-10,
(2)control cable is shielded type,
(3)power supply cable between inverter and filter is shielded type,
(4)motor cable is shielded type
(5) EMC cable gland 4pcs
0.75 - 1.1kW C2 C2
(1)Filter is FT121-20,
(2)control cable is shielded type,
(3)power supply cable between inverter and filter is shielded type.
(4)motor cable is shielded type
(5) EMC cable gland 4pcs
Table 5 - WECM - EMC category compliance for decentralized mounting drive, according to IEC 61800-3
For any other condition different than here described please consult WEG for specifying a solution
that better comply with your installation requirements.
Only Equipment intended to be use in First environment that have a total rated power lower or equal
than 1kW are required to use an external passive filter (PFC) in order to comply with the IEC 61000-
3-2 and comply with the C2 requirement for Low-frequency disturbance voltage as indicated in the
IEC 61800-3 requirements for the electromagnetic compatibility (EMC)
In case the final equipment ascribes to the conditions above, please refer to item 6.6 for more
information regarding the WEG optional PFC filter
Table 4 - WECM - EMC category compliance for drive attached to the motor, according to IEC 61800-3
For optional decentralized mounting the following characteristics are required to comply with
different values of the standard:

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6.1. SELECTING THE ROTATION DIRECTION
On the standard communication version of the WECM:
gRemove the plastic lid from the back side of the drive cover;
gUse the DIP switch number 2 to select the rotation direction between counter-clockwise (CCW:
switch in ON position) or clockwise (CW), looking from the motor drive end (shaft);
gReinstall the plastic lid to the back side of the drive cover after the adjust;
NOTE!
If the rotation direction is changed while the product is running, the motor will decelerate,
reverse the direction and accelerate to the same speed that was running before.
ATTENTION!
After remove and reinstall, make sure that the plastic lid from the back side of the drive
cover is securely closed to guarantee the protection degree.
ATTENTION!
After remove and reinstall, make sure that the plastic lid from the back side of the drive
cover is securely closed to guarantee the protection degree.
gLocal speed adjust:
 Remove the plastic lid from the back side of the drive cover;
 Use the two tact buttons located in the opening on the back cover to change speed;
 Keep pressing button SW1 to decelerate or button SW2 to accelerate the motor;
 The motor will turn off when the speed reaches a value lower than the minimum speed of
the range;
 Pressing the button <1s, the rotation increase / decrease rate is 100 RPM/s
 Pressing the button >1s, the rotation increase / decrease rate is 300 RPM/s
 The product will not go to speeds higher than the value adjusted to be the maximum speed
by WEG EC Motor Speed Controller; or, case not used, the nominal Nameplate Speed;
 Reinstall the plastic lid to the back side of the drive cover after the adjust.
For MODBUS optional please refer to specific manual accesible in www.weg.net.
6.2. HOW TO ADJUST SPEED
On the standard communication version of the WECM, the product speed can be changed by
local adjust (buttons) or remote adjust (control cable);
gTo select between local or remote speed adjust:
 Remove the plastic lid from the back side of the drive cover;
 Use the DIP switch number 1 to select between local (switch in ON position) or remote
adjust;
 Reinstall the plastic lid to the back side of the drive cover after the adjust.

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Signal type Condition Resulting speed value Conductors
1 2
DC voltageaLower than 2V DC Zero (motor is off) Blue
Black
From 2 to 10V DC ((Maxb-Minc)/8)×(ISd-2)+Min
DC current Lower than 4mA DC Zero (motor is off) Red
From 4 to 20mA DC ((Maxb-Minc)/16)×(ISd-4)+Min
Frequency Lower than 10% Zero (motor is off) Brown
From 10 to 95% ((Maxb-Minc)/85)×(ISd-10)+Min
Table 6 - Control input reference
gRemote speed adjust:
 The speed can be adjusted by the input signals available in the control cable:
 DC voltage: 2 to 10V DC [tolerance: +10%];
 DC current: 4 to 20mA DC [tolerance: +10%];
 Frequency duty-cycle: 10 to 95%
 Voltage: 10 to 24Vpk [tolerance: -5%/+10%];
 Frequency: 80Hz [tolerance: -2,5%/+2,5%];
 The product will turn off if imposed signals lower than 2V DC, 4mA DC or 10%.
 The speed can be adjusted using the external speed controller (see item 6.4).
 Control input reference:
NOTE!
gThe standard maximum speed value is preset at WEG to be the highest value of
the speed range but, can be changed by the user (see item 6.3).
gThe product has speed memory when operating in local speed adjustment. The
last speed adjusted will be kept in memory when the input power supply is removed.
The motor will accelerate to the memorized speed when the input power supply is
reconnected.
gThe local controls inside the opening on the back cover are totally insulated.
There is no risk of shock when touch any internal part of this opening, even when the
solution is running.
ATTENTION!
After remove and reinstall, make sure that the plastic lid from the back side of the drive
cover is securely closed to guarantee the protection degree.
Figure 6 - Product standard control switches

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Notes:
a. The DC voltage signal can be applied by an external power supply or using the built-in
10VDC source and an additional potentiometer (5kΩ to 10kΩ);
b. Maximum speed adjusted (see item 6.3);
c. Solution minimum speed (lowest value of the speed range);
d. Input signal (V DC, mA DC, %) supplied to the respective remote input.
Figure 7 - DC voltage input
(using built-in power supply)
Figure 8 - DC voltage input
(using external power supply)
Figure 9 - DC current input Figure 10 - Frequency input
Control cable electrical connections diagram:
ATTENTION!
gThe built-in power supply has an output limit of 25mW or 2,5mA;
gThe product can be permanently damaged if imposed signals out of the specifi-
cation;
gMake sure that all unused conductors in control cable are insulated to avoid prod-
uct malfunction or damage.
gThe connection between the Yellow cable (10VDC power source) and the red
cable (DC current) will damage permanently the DC current speed control.
Recommendation for maximum conductors’ length to avoid signal drop for each connection type.
Signal Type Conductors Maximum Length (m) Cable specification
DC voltage
(built-in power supply) Yellow Blue Black 150 m 24 AWG
DC voltage
(external power supply) Blue Blue 150 m 24 AWG
DC current Red Blue 150 m 24 AWG
Frequency Brown Blue 150 m 24 AWG
Modbus (optional) Yellow Red Black 150 m 24 AWG
Table 7 - Maximum conductors' length recomended for signal wires

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6.4. HOW TO ADJUST THE MAXIMUM AND MINIMUM SPEED VALUE
On the WECM standard communication version, there are two ways to change the maximum
speed value for the remote speed adjust signals:
gUsing the product local tact buttons (only up to the maximum speed set by WEG EC Motor
Speed Controller)
 Select local speed reference in the DIP switch number 1 (switch in ON position - see
item 6.2);
 Using the tact buttons, adjust the speed to the value desired to be the maximum;
 Select remote speed reference in the DIP switch number 1;
gUsing the optional WEG EC motor external speed controller (see item 6.4) (up to the nameplate
speed).
NOTE!
gThe standard manufacturing preset value for the maximum speed is the rated
speed informed in the product nameplate;
gConsult WEG about different standard maximum speed values.
Signal Type Condition Resulting frequency value Conductors
1 2
Frequency
(speed reference)
Speed = zero zero (output voltage: 4,8V) white black
Speed > zero speed(rpm) x 0,6015
6.3. CONTROL OUTPUT REFERENCE
The WECM includes a speed reference. This signal is on at the white control cable. Whenever the
white control cable is measured against the ground, a train of pulses with maximum peak value
of 4,8V can be measured. The frequency of this train of pulses is proportional to the speed of the
motor as per explained on the table 6.2 below
Control output reference:
6.4.1.MAXIMUM SPPED
6.4.2. MINIMUM SPEED
The minimum speed of the WECM motor line is fixed and cannot be change with the use of a stan-
dard software. The minimum speed of the line follows the logic of the table below:
Rated speed ≤400rpm >400rpm and ≤1800rpm >1800rpm
Minimum speed 45rpm 200rpm 500rpm
Table 9 - Minimum speed according to motor rated speed
Consult WEG about different factory minimum speed values.
For MODBUS optional please refer to specific manual accesible in www.weg.net
Table 8 - Control output reference

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6.5. EXTERNAL SPEED CONTROLLER (OPTIONAL)
The running speed and the maximum speed adjust can be done using the external WEG EC Motor
speed controller.
Connect the control cables at the WEG EC Motor speed controller borne. Below picture gives the
connection sequence.
Figure 12 - Controller sequence connection
Figure 11 - WEG EC Motor speed controller

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6.6. FIRE MODE FUNCTION (OPTIONAL)
DANGER!
gNotice that the WECM / Emeral eZA is just one of the components of the ventila-
tion system, and it is configurable for different functions, including the “Fire Mode”
function;
gThus, the full operation of the “Fire Mode” function depends on the accuracy of
the project and on the joint performance of the components of the system;
gVentilation systems that work on life safety applications must be certified or
approved by the Fire Department and/or other public authority, according to local
regulations;
gThe non-interruption of the operation of the WECM / Emeral eZA, when con-
figured for operation in the “Fire Mode” function, is critical and must be taken into
account in the preparation of safety plans in the environments in which they are
installed, since damages may occur to the WECM / Emerald eZA itself and to other
components of the ventilation system, to the environment in which it is installed and
to people with risk of death;
gThe operation in the “Fire Mode” function may, under certain circumstances,
result in fire, since the protection devices will be disabled;
gOnly personnel from engineering and safety must consider the configuration of
the equipment for the “Fire Mode” function;
gWEG strongly recommends to follow the cares and procedures above before
using the WECM / Emerald eZA in the “Fire Mode” function, and it will not be liable
to the final user or third parties for any losses or damages direct or indirectly incurred
due to the programming and operation of the WECM / Emerald eZA in “Fire Mode”
regime, considering the critical and special use of this function.
gFed the EC motor following the instructions of the item 5.1;
gRunning speed adjust
 Connect the conductors from the control cable to the external speed controller according
to Figure 6.5;
 Rotate CTR in clockwise direction (CW) to increase the running speed;
 Rotate CTR in counter-clockwise direction (CCW) to reduce the running speed;
 During the adjust, the running speed can be verified in the display;
Maximum speed adjust
 Remove the plastic lid from the back side of the drive cover;
 Connect the external controller to the EC motor using the cable supplied with the external
controller and the connector inside the EC motor back opening;
 Rotate MAX in clockwise direction (CW) to increase the maximum speed;
 Rotate MAX in counter-clockwise direction (CCW) to reduce the maximum speed;
 During the adjust, the maximum speed can be verified in the display, during 5s;
 While the max. speed is displayed on the screen, push the button "Enter" to set the maximum
speed;
 Disconnect the cable from the EC motor back opening connector;
 Reinstall the plastic lid to the back side of drive cover after the adjust;
 If the maximum speed set is lower than the running speed, the motor will decelerate until
reaching the new maximum speed set.
ATTENTION!
After remove and reinstall, make sure that the plastic lid from the back side of the drive
cover is securely closed to guarantee the protection degree.

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NOTE!
When the user activates the "Fire Mode" function, he/she acknowledges that the
protection functions of the WECM / Emerald eZA are disabled, which may result in
damages to the WECM / Emerald eZA itself, to the components connected to it, to
the environment in which it is installed and to people present in such environment;
therefore, the user takes full responsibility for the risks arising from such operating
condition. Operation with the “Fire Mode” function programmed voids the warranty
of the product. The operation in this condition is internally registered by the WECM /
Emerald eZA and must be validated by a duly qualified professional of engineering and
occupational safety, since such procedure significantly increases the operating risk.
The “Fire Mode” function is intended to make the WECM / Emerald eZA continue work under
adverse conditions, inhibiting most faults generated by the electronic in order to protect itself or
protect the motor.
The “Fire Mode” is selected by applying 10VDC to the frequency input during 5 seconds. The built-
in 10VDC source can be used. When selected, the motor will speed up to the maximum speed set
and will disable all motor software protections.
The only possible way to turn off the "Fire Mode" operation function is to de-energize the complete
solution and energize it back again.
6.7. PASSIVE POWER FACTOR CORRECTION (PFC) (OPTIONAL)
Only Equipment intended to be use in First environment that have a total rated power lower or
equal than 1kW are required to use an external passive filter (PFC) in order to comply with the
IEC 61000-3-2 and comply with the C2 requirement for Low-frequency disturbance voltage as
indicated in the 61800-3 requirements for the electromagnetic compatibility (EMC) The passive PFC
filter shall be installed in series with the line (L) power cable as shown on diagram below.
NOTE!
The end user takes personal responsibility for the EMC compliance of the whole
installation.
Figure 13 - Passive PFC filter diagram
WECM are not 'smoke extraction' motors (as defined in EN 12101-3) and may not
under any circumstances be installed inside the high temperature airstream.

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Blinking
periods
Fault
description
ON
time
Off
time
Wait
interval
time (off)
Probable Causes Solution Fault Recovery
Modbus
code
Error*3
2
(Fast
flash)
Under
Voltage 0.1 0.1 -
- Voltage supply lower than
nameplate limitation;
- Input power cable
Connection problem;
- Hardware problem
(Contact WEG)
- Check the power
supply voltage;
- Check the input power
cable connection;
Recovers
automatically after
power supply
recovers;
0x01
3Overload /
Over current
0.25 0.25 2
- Load used over the motor
maximum value;
- Higher Ambient
temperature than limitation;
- Check the real load
application (Measure
current from drive to
motor*2);
- Measure the ambient
conditions (temperature
and air over the motor);
Recovers
automatically
after conditions
are back to
specification
0x03
5
IPM
Temperature
Limitation
- High Ambient temperature
or lower cooling conditions
than the minimum.
(See user manual)
- Wait temperature
recovery
- Consult WEG if this
problem persists;
Recovers
automatically after
temperature gets
lower than the
limitation
0x04
6 Overvoltage -Voltage supply higher than
specified in the nameplate;
- Waiting power supplier
recovered;
Recovers
automatically after
power supply
recovers;
0x02
The LED will blink in case of any fault. The below table indicates the blinking behavior according the
fault type:
Table 10 - The blinking behavior according to fault type
7. PRODUCT PROTECTIONS AND FAULT DIAGNOSIS
WECM / Emerald eZA products have many incorporated electronic protections:
gInput under voltage protection;
gLocked rotor protection;
gOverload protection;
gOver temperature protection.
gOutput overcurrent / short-circuit protection;
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);
gThe LED will stay OFF while the motor is stopped (speed equals to zero);
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.

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DANGER!
gBefore 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;
gFor 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!
gMotor disassembly during the warranty period must be performed by a WEG
authorized service center only;
gRegularly inspect the operation of the motor, according to its application, and en-
sure 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.
*1 Valid for all Software / Firmware versions of WECM / Emerald eZA single-phase line products.
*2 Only to be performed by a professional technical service authorized by WEG
*3 Only valid for MODBUS communication versions at address 0x0050.
The missing blinking periods (no.1 / no.4, no.7, no.8, no.13) are free values with no set functionality
from the factory.
7.1. INFORMATION FOR CONTACTING TECHNICAL SUPPORT
For technical support and servicing, it is important to have the following information in hands:
gMotor model, Batch number, and manufacturing date available in the motor nameplate (refer to
item 4);
gInstalled software version available in the drive label (refer to item 4).
8. MAINTENANCE
9. ENVIRONMENTAL INFORMATION
For information regarding disposal at end of life cycle refer to the manual
"Disposal and Environmental Information" available in the website www.weg.net or contact WEG.
10. ADDITIONAL INFORMATION
For further information about shipment, storage, handling, installation, operation and maintenance
of electric motors, access the website www.weg.net .
For special applications and operating conditions refer to the manual 50033244 available in the
website or contact WEG.
When contacting WEG, please, have the full description of the motor at hand, as well as the Motor
model, Batch Number and manufacturing date, indicated on the motor nameplate.

20 | WECM / Emerald eZA Manual
www.weg.net
10.1. WARRANTY TERM
WEG Equipamentos Elétricos S/A, Motors Unit (“WEG”), offers warranty against defects in
workmanship and materials for its products for a period of 18 months from the invoice date issued
by the factory or distributor/dealer, limited to 24 months from the date of manufacture.
The paragraphs above contain the legal warranty periods.
If a warranty period is defined in a different way in the commercial/technical proposal of a particular
sale, that will supersede the time limits set out above.
The warranty periods above are independent of the product installation date and the startup.
If any defect or abnormal occurrence is detected during machine operation, the customer must
immediately notify WEG in writing about the occurred defect, and make the product available for
WEG or its Authorized Service Center for the period required to identify the cause of the defect, check
the warranty coverage, and perform the proper repairs.
In order for the warranty to be valid, the customer must be sure to follow the requirements of WEG’s
technical documents, especially those set out in the product Installation, Operation and Maintenance
Manual, as well as the applicable standards and regulations in force in each country.
Defects arising from the inappropriate or negligent use, operation, and/or installation of the equipment,
non-execution of regular preventive maintenance, as well as defects resulting from external factors or
equipment and components not supplied by WEG, will not be covered by the warranty.
The warranty will not apply if the customer at its own discretion makes repairs and/or modifications
to the equipment without prior written consent from WEG.
The warranty will not cover equipment, components, parts and materials whose lifetime is usually
shorter than the warranty period. It will not cover defects and/or problems resulting from force
majeure or other causes not imputable to WEG, such as, but not limited to: incorrect or incomplete
specifications or data supplied by the customer; transportation, storage, handling, installation,
operation and maintenance not complying with the provided instructions; accidents; defects in
the construction works; use in applications and/or environments for which the machine was not
designed; equipment and/or components not included in the scope of WEG supply. The warranty
does not include disassembly services at the buyer’s premises, product transportation costs and
travel, lodging and meal expenses for the technical staff of the Service Centers, when requested by
the customer.
The services under warranty will be provided exclusively at WEG authorized Service Centers or at one
of its manufacturing plants.
Under no circumstances will the warranty services extend the equipment warranty period.
WEG’s Civil Liability is limited to the supplied product; WEG will not be liable for indirect or consequential
damages, such as losses of profit and revenue losses and alike which may arise from the contract
signed between the parties.
11. TECHNICAL SPECIFICATIONS
11.1. POWER SUPPLY
gRated voltage: according product nameplate;
gVoltage tolerance: -10% to +10%;
gFrequency: 50/60 Hz (48Hz to 62Hz);
gPhase imbalance: ≤3% of the rated phase-to-phase input voltage;
gMinimum interval between consecutive power-cycle (ON/OFF) of the WECM input: 5 minutes.
gMaximum 1 connection from power supply cycle per 5 minutes.