ebm-papst G3G250-MW50-01 User Manual

G3G250-MW50-01

Operating instructions

ebm-papst Mulfingen GmbH & Co. KG

Bachmühle 2
D-74673 Mulfingen
Phone [phone]
Fax [phone]
[e-mail]
www.ebmpapst.com

CONTENTS

Translation of the original operating instructions

CAUSES AND REMEDIES

1. SAFETY REGULATIONS AND NOTES

Please read these operating instructions carefully before starting to work
with the device. Observe the following warnings to prevent malfunctions
or physical damage to both property and people.
These operating instructions are to be regarded as part of this device.
If the device is sold or transferred, the operating instructions must
accompany it.
These operating instructions may be duplicated and forwarded for
information about potential dangers and their prevention.

11. SAFETY REGULATIONS AND NOTES

11.1 Levels of hazard warnings

11.2 Staff qualification

11.3 Basic safety rules

11.4 Electrical voltage

21.5 Safety and protective functions

21.6 Electromagnetic radiation

21.7 Mechanical movement

21.8 Deflagration

21.9 Emission

31.10 Hot surface

31.11 Transport

31.12 Storage

31.13 Disposal

32. PROPER USE

53. TECHNICAL DATA

53.1 Product drawing

63.2 Nominal data

63.3 Data according to ErP directive

63.4 Technical features

63.5 Mounting data

63.6 Transport and storage conditions

73.7 Electromagnetic compatibility

74. CONNECTION AND START-UP

74.1 Connecting the mechanical system

74.2 Connecting the electrical system

84.3 Connection in terminal box

104.4 Factory settings

114.5 Connection screen

124.6 Checking the connections

124.7 Switch on device

124.8 Switching off the device

125. INTEGRATED PROTECTIVE FUNCTIONS

136. MAINTENANCE, MALFUNCTIONS, POSSIBLE

146.1 Cleaning

146.2 Safety test

1.1 Levels of hazard warnings

These operating instructions use the following hazard levels to indicate
potentially hazardous situations and important safety regulations:

DANGER

Indicates an imminently hazardous situation which, if not
avoided, will result in death or serious injury. Compliance with
the measures is mandatory.

WARNING

Indicates a potentially hazardous situation which, if not avoided,
could result in death or serious injury. Exercise extreme
caution while working.

CAUTION

Indicates a potentially hazardous situation which, if not avoided,
may result in minor or moderate injury or damage of property.

NOTE

A potentially harmful situation can occur and, if not avoided, can
lead to property damage.

1.2 Staff qualification

The device may only be transported, unpacked, installed, operated,
maintained and otherwise used by qualified, trained and authorised
technical staff.
Only authorised specialists are permitted to install the device, to carry
out a test run and to perform work on the electrical installation.

1.3 Basic safety rules

Any safety hazards stemming from the device must be re-evaluated
once it is installed in the end device.
Observe the following when working on the unit:

; Do not make any modifications, additions or conversions to the

device without the approval of ebm-papst.

1.4 Electrical voltage

; Check the electrical equipment of the device at regular intervals, refer

to chapter 6.2 Safety test.

; Replace loose connections and defective cables immediately.

DANGER
Electrical load on the device

Risk of electric shock

→ Stand on a rubber mat if you are working on an electrically

charged device.

WARNING
Terminals and connections have voltage even with a
unit that is shut off

Electric shock

→ Wait five minutes after disconnecting the voltage at all poles

before opening the device.

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G3G250-MW50-01

Operating instructions

CAUTION
In the event of failure, there is electric voltage at the
rotor and impeller

The rotor and impeller are base insulated.

→ Do not touch the rotor and impeller once they are installed.

CAUTION
If control voltage is applied or a speed setpoint is stored,
the motor automatically restarts, e.g. after a power failure.

Danger of injury

→ Keep out of the danger zone of the device.

→ When working on the device, switch off the mains

supply voltage and secure the latter from being switched on
again.

→ Wait until the device stops.

→ After working on the device, remove any used tools or

other objects from the device.

1.5 Safety and protective functions

DANGER
Missing safety device and non-functioning safety device

If there is no safety device, you could be seriously injured, for
example if you reach into the running device or your hands are
sucked into it.

→ Operate the device only with a fixed and isolating safety

protection and a fixed guard grille.
The guard must withstand the kinetic energy of a fan blade
detaching at maximum speed.

→ The device is a built-in component. You, the owner/

operator, are responsible for providing adequate protection for
the device.

→ Shut down the device immediately if you detect a

missing or ineffective protective feature.

1.6 Electromagnetic radiation

Interference from electromagnetic radiation is possible, e.g. in conjunction
with open and closed-loop control devices.
If unacceptable emission intensities occur when the fan is installed,
appropriate shielding measures have to be taken by the user.

NOTE
Electrical or electromagnetic interferences after
integrating the device in installations on the customer's
side.

→ Verify that the entire setup is EMC compliant.

1.7 Mechanical movement

DANGER
Danger of injury from open blower

Gas escapes. When the blower is open, you come into contact
with rotating and electrically live parts. Escaping gas may also

Translation of the original operating instructions

cause explosions.

→ Never open the blower.

DANGER
Flying parts

Missing safety devices may cause balancing weights or
broken fan blades to be ejected at high speeds, causing bodily
harm.

→ Take appropriate safety measures.

WARNING
Rotating device

Long hair, loose items of clothing and jewellery could become
entangled and pulled into the device. You could be injured.

→ Do not wear any loose clothing or jewellery while working

on rotating parts.

→ Protect long hair by wearing a cap.

WARNING
Flying parts

Missing safety devices may cause fan blades to be ejected at
high speeds, causing bodily harm.

→ Take appropriate safety measures.

The safety devices must prevent contact with rotating parts
and the printed circuit board.

1.8 Deflagration

DANGER
Gas escapes through leaky housing after deflagration

Danger of injury

→ After a deflagration, check that the housing of the gas blower

is tightly sealed.

→ Replace any gas blower with a leaky housing.

DANGER
Fire and deflagration hazard

The gas blower is not approved according to Ex protection
guidelines. Rotating parts can scrape against stationary parts.
This may cause sparks and chips. The surface temperature
may rise, resulting in a fire.

→ Check which hazards arise from installing, operating,

servicing or disposing the gas blower in conjunction with
your device.
Prevent these hazards.
Carry out all appropriate measures to this purpose.

1.9 Emission

WARNING
Depending on the installation and operating conditions,
a sound pressure level greater than 70 dB(A) may arise.

Danger of noise-induced hearing loss

→ Take appropriate technical safety measures.

→ Protect operating personnel with appropriate safety

equipment, e.g. hearing protection.

→ Also observe the requirements of local agencies.

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G3G250-MW50-01

Operating instructions

1.10 Hot surface

CAUTION
High temperature at the electronics enclosure

Danger of burn injuries

→ Ensure that sufficient protection against accidental contact is

provided.

1.11 Transport

NOTE
Transport of blower

→ Transport the blower in its original packaging only.

→ Secure the blower so that it does not slip, e.g. by using a

clamping strap.

1.12 Storage

; Store the device, partially or fully assembled, in a dry and

weatherproof manner in the original packing in a clean environment.

; Protect the device from environmental impacts and dirt until the final

installation.

; We recommend storing the device for a maximum up to one year to

guarantee proper operation and longest possible service life.

; Even devices explicitly suited for outdoor use are to be stored as

described prior to being commissioned.

; Maintain the storage temperature, see

chapter 3.6 Transport and storage conditions.

; Please make sure that all screwed cable glands are fitted with

dummy plugs.

1.13 Disposal

When disposing of the device, please comply with all relevant
requirements and regulations applicable in your country.

Translation of the original operating instructions

2. PROPER USE

The device is exclusively designed as a built-in device for moving air
and gases according to its technical data.
Any other or secondary use is deemed improper and constitutes a
misuse of the device.
Installations on the customer's side must meet the mechanical, thermal
and service life-related stresses that can occur.

Proper use also includes:

● Use the device in power systems with earthed neutral (TN/TT power

systems) only.

● Moving air in gas burners.

● Moving air with a density ranging from 0.9 to 1.2 kg/m³.

● Minding the operating instructions.

● Using the device within the permitted ambient temperature range; see

chapter 3.6 Transport and storage conditions and
chapter 3.2 Nominal data.

● Only using the device in stationary systems.

● Installing the device into an overall system for moving air.

● Commissioning the built-in component only after installation in

the customer unit.

● Operating the device with all protective features in place.

● Only using the device in stationary systems.

● Carrying out all maintenance.

Improper use

Using the device in the following ways is particularly prohibited and
may cause hazards:

● Operating the device with an imbalance, e.g. caused by dirt deposits

or icing.

● Moving a medium that contains abrasive particles.

● Moving a highly corrosive medium.

● Moving a medium that contains dust pollution, e.g.

suctioning off saw dust.

● Operating the gas blower in an environment that contains

flammable gases or dust or combustible solids or fluids.

● Moving an air/gas mixture outside an overall system

that fulfils the requirements described above.

● Using the blower as a safety component or for taking

on safety-related functions.

● Operation in medical equipment with a life-sustaining or lifesaving

function.

● Contact with materials that could damage blower parts, e.g. liquids

during cleaning.

● Operation with completely or partially disassembled or modified

protective features.

● Exposure to radiation which could damage blower parts, e.g. strong

UV radiation.

● Operation with external vibrations.

● Operating the device in an explosive atmosphere.

● Operation with completely or partially disassembled or modified

protective features.

● In addition, all application options that are not listed

under proper use.

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G3G250-MW50-01

● Operation in medical equipment with a life-sustaining or lifesaving

Operating instructions

function.

● Operation with external vibrations.

● Moving solids content in flow medium.

● Painting the device

● Connections (e.g. screws) coming loose during operation.

● Opening the terminal box during operation.

Translation of the original operating instructions

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G3G250-MW50-01

3. TECHNICAL DATA

3.1 Product drawing

Operating instructions

All measures have the unit mm.

1 Cable diameter min. 4 mm, max. 10 mm, tightening torque 4±0.6 Nm
2 Depth of screw 10-12 mm, tightening torque 20±3 Nm
3 Tightening torque 3.5±0.5 Nm

Translation of the original operating instructions

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G3G250-MW50-01

Operating instructions

You can control the blower either via the 0-10 VDC input or the
PWM input. Note: Inputs cannot be used simultaneously.

3.2 Nominal data

Motor M3G112-EA

Phase 3~
Nominal voltage / VAC 400
Nominal voltage

380 .. 480

range / VAC
Frequency / Hz 50/60

Type of data definition ml
Speed / min

-1

6100

Power input / W 2400
Current draw / A 4.0
Min. ambient temperature

-25

/ °C
Max. ambient

50

temperature
/ °C
Min. temp. of flow

-25

medium / °C
Max. temp. of flow

+50

medium / °C

ml = Max. load · me = Max. efficiency · fa = Running at free air
cs = Customer specs · cu = Customer unit

Subject to alterations

3.3 Data according to ErP directive

Installation category A
Efficiency category Static
Variable speed drive Yes
Specific ratio

*

Specific ratio = 1 + pfs / 100 000 Pa

*

1.00

Actual Request

2013

Overall efficiency ηes / % 59.8 51.3 54.3
Efficiency grade N 66.5 58 61
Power input Ped / kW 2.29
Air flow qv / m³/h 1165
Pressure increase total psf / Pa 4000
Speed n / min

Data definition with optimum efficiency.

The ErP data is determined using a motor-impeller combination in a standardised
measurement configuration.

-1

6495

3.4 Technical features

Mass 22.3 kg
Size 250 mm

Translation of the original operating instructions

Surface of rotor Coated in black
Material of electronics
housing
Material of impeller Aluminium sheet
Housing material Die-cast aluminium
Material of distancing
profiles
Direction of rotation Clockwise, seen on rotor

Die-cast aluminium

Aluminium

Request
2015

Type of protection IP 20
Insulation class "B"
Humidity class F0
Mounting position Any
Cooling bore / aperture Rotor-side
Operation mode S1
Motor bearing Ball bearing
Technical features - Output 10 VDC, max. 10 mA

- Output 20 VDC, max. 50 mA

- Tach output

- Alarm relay

- Motor current limit

- PFC, passive

- Soft start

- Control input 0-10 VDC / PWM

- Over-temperature protected
electronics / motor

- Line undervoltage / phase failure
detection

Touch current acc.

<= 3.5 mA

IEC 60990 (measuring
network Fig. 4, TN
system)
Electrical leads Via terminal box
Motor protection Thermal overload protector (TOP) wired

internally

Protection class I (if protective earth is connected by

customer)

Approval EAC; UL 1004-7 + 60730

For cyclic speed loads, note that the rotating parts of the device
are designed for maximum one million load cycles. If you have
specific questions, contact ebm-papst for support.

3.5 Mounting data

; Secure the mounting screws against accidentally coming loose (e.g.

by using self-locking screws).

Strength class for

8.8

mounting screws

You can obtain additional mounting data from the product drawing if
necessary.

3.6 Transport and storage conditions

; Use the device in accordance with its protection type.

Max. permissible
ambient motor temp.
(transp./ storage)
Min. permissible
ambient motor temp.
(transp./storage)

+80 °C

-40 °C

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G3G250-MW50-01

Operating instructions

3.7 Electromagnetic compatibility

If several devices are switched in parallel on the mains side so
that the line current of the arrangement is in the range of 16 - 75
A, then this arrangement conforms to IEC 61000-3-12 provided
that the short-circuit power Ssc at the connection point of the
customer system to the public power system is greater than or
equal to 120 times the rated output of the arrangement.
It is the responsibility of the installation engineer or operator/
owner of the device to ensure, if necessary after consultation
with the network operator, that this device is only connected to
a connection point with a Ssc value that is greater than or equal
to 120 times the rated output of the arrangement.

4. CONNECTION AND START-UP

4.1 Connecting the mechanical system

DANGER
Gas leaking from improperly sealed housing

Risk of fatal injury

→ Prior to commissioning, check that the housing of the gas

blower is pressure-tight.
When doing so, close the intake and exhaust opening and
the shaft opening.

→ In addition, check that rotating parts do not scrape against

stationary parts.

DANGER
Leaks may occur.

As a result of design necessities, the gas blower is not tightly
sealed, e.g. at the shaft opening. This may cause leaks during
operation. Deflagrations may also cause long-term damage or
deformation of the housing, which can result in leaks. An air/
gas mixture may accumulate outside of the gas blower. The
blower may explode. You could be severely injured.

→ Check which hazards arise from installing, operating,

servicing or disposing of the gas blower in conjunction with
your device.
Prevent these hazards.
Carry out all appropriate measures to this purpose.

CAUTION
Cutting and crushing hazard when removing the blower
from the packaging

→ Carefully remove the blower from its packaging, only

touching the housing. Make sure to avoid any shock.

→ Wear safety shoes and cut-resistant safety gloves.

CAUTION
Heavy load when taking out the device

Bodily harm, e.g. back injuries, are possible.

→ Two people should remove the device out of its packaging

together.

; Check the device for transport damage. Damaged devices must no

longer be installed.

; Install the undamaged device according to your application.

4.2 Connecting the electrical system

DANGER
Electric voltage on the device

Electric shock

→ Always install a protective earth first.

→ Check the protective earth.

DANGER
Incorrect insulation

Translation of the original operating instructions

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Risk of fatal injury from electric shock

→ Use only cables that meet the specified installation

requirements for voltage, current, insulation material, load etc.

→ Route cables such that they cannot be touched by any

rotating parts.

G3G250-MW50-01

Operating instructions

DANGER
Electrical load (>50 µC) between mains wire and
protective earth connection after switching of the supply
when switching multiple devices in parallel.

Electric shock, risk of injury

→ Make sure that sufficient protection against accidental contact

is provided.
Before working on the electrical connection, the
connections to the mains supply and PE must be shorted.

CAUTION
Electrical voltage

The device is a built-in component and features no electrically
isolating switch.

→ Connect the device only to circuits that can be switched off

using an all-pole disconnecting switch.

→ When working on the device, you must switch off the

system/machine in which the device is installed and secure
it from being switched on again.

NOTE
Interferences and failures are possible

Maintain a distance to the power supply line when routing the
control lines of the device.

→ Ensure a sufficiently large clearance.

Recommendation: clearance > 10 cm (separate cable
routing)

NOTE
Water penetration into leads or wires

Water enters at the cable end on the customers side and can
damage the device.

→ Make sure that the cable end is connected in a dry

environment.

The control voltage circuit is not electrically isolated. Connect
the device only to circuits that can be switched off using an all­pole disconnecting switch.

4.2.1 Prerequisites

; Check whether the data on the type plate agree with the connection

data.

; Before connecting the device, ensure that the supply voltage matches

the operating voltage of the device.

; Only use cables designed for current according to the type plate.

For determining the cross-section, follow the basic principles in
accordance with EN 61800-5-1. The protective earth must have a
cross-section equal to or greater than the outer conductor cross­section.
We recommend the use of 105°C cables. Ensure that the minimum
cable cross-section is at least
AWG26/0.13 mm².

4.2.2 Power supply connection, fuse protection

Assignment of conductor cross-sections and the fuse protection required

Translation of the original operating instructions

for them (overload protection only, no device protection).

Nominal
voltage

Safety
fuse

VDE UL VDE mm² *AWG

Automatic
circuit
breaker

Wire
cross­section

Wire
cross­section

3/PE AC
380 - 480
VAC
3/PE AC
380 - 480
VAC
3/PE AC
380 - 480
VAC
3/PE AC
380 - 480
VAC

* AWG = American Wire Gauge

4.2.3 Idle current

● The values lie in a range of typical < 250 mA.

● The effective power in this operating state (readiness for operation) is

simultaneously at typical < 5 W.

4.2.4 Residual current operated device

4.2.5 Leakage current

4.2.6 Locked-rotor protection

16 A 15 A C16A 1.5 16

20 A 20 A C20A 2.5 14

25 A 25 A C25A 4.0 12

32 A 30 A C32A 6.0 10

Because of the EMC filter integrated for compliance with EMC
limits (interference emission and interference immunity), idle
currents in the mains cable can be measured even when the
motor is at a standstill and the mains voltage is switched on.

Only universal (type B or B+) RCD protective devices are
permitted. Like frequency inverters, RCD protective devices
cannot provide personal safety while operating the device.
When switching on the power supply of the device, pulsed
charge currents from the capacitors in the integrated EMC filter
can lead to the RCD protective devices triggering without
delay. We recommend residual current devices with a trigger
threshold of 300 mA and delayed triggering (super-resistant,
characteristic K).

For asymmetrical power systems or if a phase fails, the
leakage current can increase to a multiple of the nominal value.

Due to the locked-rotor protection, the start-up current (LRA) is
equal to or less than the nominal current (FLA).

4.3 Connection in terminal box

4.3.1 Preparing connection lines for the connection

Strip the cable just enough so that the screwed cable gland is tight and
the terminals are relieved of strain. Tightening torque, see chapter 3.1
Product drawing.

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G3G250-MW50-01

Fig. 1: Recommended stripping lengths in mm (inside the terminal box)
Legend: CL = control lines

4.3.2 Connecting cables with terminals

WARNING
Terminals and connections have voltage even with a
unit that is shut off

Electric shock

→ Wait five minutes after disconnecting the voltage at all poles

before opening the device.

; Remove the cap from the screwed cable gland.

Remove the cap only in those places where cables are inserted.

; Mount the screwed cable glands with the seal inserts provided in the

terminal box.

; Insert the line(s) (not included in the standard scope of delivery) into

the terminal box.

; First connect the "PE" (protective earth) connection.

; Connect the lines to the corresponding terminals.

Use a screwdriver to do so.
During the connection work, ensure that no cables splice off.

Operating instructions

Fig. 2: Connecting the wires to terminals

; Seal the terminal box.

4.3.3 Cable routing

No water may penetrate along the cable in the direction of the cable gland.
When routing the cable, ensure that the screwed cable glands are
arranged at the bottom. The cables must always be routed downwards.

Translation of the original operating instructions

Fig. 3: Cable routing for fans installed upright.

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G3G250-MW50-01

Operating instructions

4.4 Factory settings

Factory settings with which the device is pre-set by ebm-papst.

Control mode
parameter set 1
Control mode
parameter set 2
Fan / device adress 01
Max. PWM / % 100
Min. PWM / % 5,1
Save set value to
EEPROM
Set value control Analogue (linear)
Control function
parameter set 1
Control function
parameter set 2

PWM controlling

PWM controlling

Yes

Positive (heating)

Positive (heating)

Translation of the original operating instructions

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G3G250-MW50-01

4.5 Connection screen

Operating instructions

No. Conn. Designation Function / assignment
1 1,2,3 L1,L2,L3 Power supply 3-phase, 50/60 Hz

PE Protective earth
2 1 NO Alarm relay, make for failure
2 2 COM Alarm relay, common connection (2A, 250VAC,AC1)
2 3 NC Alarm relay, break for failure
3 PWM PWM Set value input via PWM; 16-45 V high level; 1-10 kHz; can be used exclusively as an alternative to

connection 0-10 V

3 GND GND Signal ground for control interface
3 GND GND Signal ground for control interface
3 0 - 10 V 0 - 10 V Analogue setpoint input, 0 - 10 V (impedance 100 kΩ), can be used exclusively as an alternative to

connection PWM; for correct function, the PWM input must be bridged with GND.

3 + 20 V + 20 V Supply for external sensor; 20 VDC(±20%) max. 50 mA
3 + 10 V + 10 V Supply for external potentiometer, 10 VDC(±10%) max. 10 mA
3 Tach Tach Speed monitoring output; 12 VDC(±10%) max. 10 mA; impedance 1 kΩ; 4 pulses / revolution

Translation of the original operating instructions

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G3G250-MW50-01

Operating instructions

4.6 Checking the connections

; Make sure that the power is off (all phases).

; Secure it from being switched on again.

; Check the correct fit of the connection lines.

; Screw the terminal box cover closed again. Terminal box tightening

torque, see chapter 3.1 Product drawing.

; Route the connecting cables in the terminal box so that the terminal

box cover closes without resistance.

; Use all plug screws (the entire number). In doing so, insert the

screws manually to avoid damage to the thread.

; Make sure that the terminal box is correctly closed and sealed and

that all screws and screwed cable glands are properly tightened.

4.7 Switch on device

The device may only be switched on if it has been installed properly and
in accordance with its intended use, including the required safety
mechanisms and professional electrical connection. This also applies for
devices which have already been equipped with plugs and terminals or
similar connectors by the customer.

WARNING
Hot motor housing

Fire hazard

→ Ensure that no combustible or flammable materials are

located close to the blower.

; Inspect the device for visible external damage and the proper function

of the protective features before switching it on.

; Check the air flow paths of the fan for foreign objects and remove any

that are found.

; Apply 0 VDC to the 0-10 V control input (if you are using the control

input)

; Apply 0 % PWM to the PWM control input (if you are using the

PWM control input)

; Apply the nominal voltage to the voltage supply.

; Start the device by changing the input signal.

5. INTEGRATED PROTECTIVE FUNCTIONS

The integrated protective functions cause the motor to switch off
automatically in case of faults described in the table.

Malfunctions Description / Function of

safety feature

Rotor position detection error An automatic restart occurs.
Locked rotor ; After the blockage is

removed, the motor restarts

automatically.
Line under-voltage (mains input
voltage outside of permitted
nominal voltage)
Phase failure A phase of the supply voltage

; If the mains supply voltage

returns to permitted values, the

motor restarts automatically.

fails for at least 5 s.

; If all phases are correctly

supplied again, the motor

automatically restarts after 10 -

40 s.

4.8 Switching off the device

Switching off the device during operation:

; Switch off the device via the control input.

; Do not switch the motor (e.g. in cyclic operation) on and off via power

supply.

Switching off the device for maintenance work:

; Switch off the device via the control input.

; Do not switch the motor (e.g. in cyclic operation) on and off via power

supply.

; Disconnect the device from the supply voltage.

; When disconnecting, be sure to disconnect the earth wire connection

last.

Translation of the original operating instructions

Item no. 50734-5-9970 · Revision 82547 · Release 2014-05-08 · Page 12 / 14

ebm-papst Mulfingen GmbH & Co. KG · Bachmühle 2 · D-74673 Mulfingen · Phone [phone] · Fax [phone] · [e-mail] · www.ebmpapst.com

G3G250-MW50-01

Operating instructions

6. MAINTENANCE, MALFUNCTIONS, POSSIBLE
CAUSES AND REMEDIES

Do not perform any repairs on your device. Return the device to ebm­papst for repair or replacement.

WARNING
Terminals and connections have voltage even with a
unit that is shut off

Electric shock

→ Wait five minutes after disconnecting the voltage at all poles

before opening the device.

CAUTION
If the control signal of a blower that is connected to the
power system is removed, the motor can restart
automatically.

Danger of injury

→ When working on the blower, switch off the mains supply

voltage and secure it from being switched on again.

→ Wait until the device stops.

CAUTION
Electrical load after device is switched off

Electric shock in case of contact

→ Wait for five minutes after disconnecting the voltage at all

poles before touching the unit.

CAUTION
If control voltage is applied or a speed setpoint is stored,
the motor automatically restarts, e.g. after a power failure.

Danger of injury

→ Keep out of the danger zone of the device.

→ When working on the device, switch off the mains

supply voltage and secure the latter from being switched on
again.

→ Wait until the device stops.

→ After working on the device, remove any used tools or

other objects from the device.

If the blower remains out of use for some time, e.g. when in
storage, we recommend switching the blower on for at least 2
hours to allow any condensate to evaporate and to move the
bearings.

Malfunction/error Possible cause Possible remedy
Impeller running
roughly

Translation of the original operating instructions

Motor does not turn Mechanical blockage Switch off, de-

Imbalance in rotating
parts

Clean the device; if
imbalance is still
evident after
cleaning, replace the
device.
If you have
attached any weight
clips during cleaning,
make sure to
remove them
afterwards.

energise, and
remove mechanical
blockage.

Mains supply
voltage faulty

Faulty connection De-energise, correct

Motor winding broken Replace device
Thermal overload
protector responded

Insufficient cooling Improve cooling. Let

Ambient temperature
too high

Check mains supply
voltage,
restore power
supply.
Important! The error
message resets
automatically.
The device starts
up again
automatically without
advance warning.

connection, see
connection diagram.

Allow motor to cool
off, locate and rectify
cause of error, if
necessary cancel
restart lock-out

the device cool
down.
To reset the error
message, switch off
the mains supply
voltage for a min. of
25 s and switch it on
again.
Alternatively, reset
the error message
by applying a control
signal of <0.5 V to
DIN1 or by short
circuiting Din1 to
GND.
Reduce the ambient
temperature. Let the
device cool down.
To reset the error
message, switch off
the mains supply
voltage for a min. of
25 s and switch it on
again.
Alternatively, reset
the error message
by applying a control
signal of <0.5 V to
DIN1 or by short
circuiting Din1 to
GND.

Item no. 50734-5-9970 · Revision 82547 · Release 2014-05-08 · Page 13 / 14

ebm-papst Mulfingen GmbH & Co. KG · Bachmühle 2 · D-74673 Mulfingen · Phone [phone] · Fax [phone] · [e-mail] · www.ebmpapst.com

G3G250-MW50-01

Operating instructions

Unacceptable
operating point (e.g.
counterpressure is
too high)

Deflagration Leakage of the

handled air/gas
mixture

If you have any other problems, contact ebm-papst.

6.1 Cleaning

NOTE

The device does not need to be cleaned.

Correct the operating
point. Let the device
cool down.
To reset the error
message, switch off
the mains supply
voltage for a min. of
25 s and switch it on
again.
Alternatively, reset
the error message
by applying a control
signal of <0.5 V to
DIN1 or by short
circuiting Din1 to
GND.
Check for leaks;
replace blower if not
properly sealed

Tightness of
screwed cable
gland
Condensate
discharge
holes for
clogging, as
necessary

Visual inspection At least every

6 months

Visual inspection At least every

6 months

Retighten,
replace if
damaged
Open bore holes

6.2 Safety test

NOTE
High-voltage test

The integrated EMC filter contains Y capacitors. Therefore, the
trigger current is exceeded when AC testing voltage is applied.

→ Test the device with DC voltage when you carry out the

high-voltage test required by law. The voltage to be used
corresponds to the peak value of the AC voltage required by
the standard.

What has to
be tested?

Check the
protective
casing against
accidental
contact for
damage and to
ensure that it is
intact
Check the
device for
damage to
blades and
housing

Translation of the original operating instructions

Mounting the
connection lines
Check the
insulation of
the wires for
damage

How to test? Frequency Which

Visual inspection At least every

Visual inspection At least every

Visual inspection At least every

Visual inspection At least every

6 months

6 months

6 months

6 months

measure?

Repair or
replacement of
the device

Replacement
of the device

Fasten

Replace wires

Item no. 50734-5-9970 · Revision 82547 · Release 2014-05-08 · Page 14 / 14

ebm-papst Mulfingen GmbH & Co. KG · Bachmühle 2 · D-74673 Mulfingen · Phone [phone] · Fax [phone] · [e-mail] · www.ebmpapst.com