ABB ACS880-04F Installation manual

—
ABB INDUSTRIAL DRIVES
ACS880-04F drive modules
Quick installation and start-up guide

ACS880-04F drive modules
Quick installation and start-up guide
Table of contents
3AXD5000044913 Rev E
EN
Original instructions
EFFECTIVE: 2023-01-17

Table of contents
Quick installation and start-up instructions
7Contents of this chapter ........................................................................
7Obey the safety instructions ...................................................................
7General safety .................................................................................
8Electrical safety precautions ...............................................................
9Select the cables and fuses .....................................................................
9Examine the installation site ...................................................................
10Make sure that the drive is compatible with the grounding system ..................
10Corner-grounded and midpoint-grounded 525…690 V delta systems ............
10Move the drive to the installation site and unpack it .....................................
13Lift the drive from the lifting points ..........................................................
13Reform the capacitors ...........................................................................
13Ensure the cooling ................................................................................
13Install the drive module onto a mounting plate ............................................
13Install the top metallic shroud and back plastic shrouds ................................
13Measure the insulation resistance of the input and motor cables and the motor ..
14Connect the power cables and install the shrouds ........................................
15Connect the control cables .....................................................................
15Default I/O connections .....................................................................
17Start-up the drive .................................................................................
19Motor overload protection ..................................................................
19Fieldbus communication ....................................................................
20Warnings and faults ..........................................................................
Technical data and references
21Electrical ratings ..................................................................................
23Fuses ................................................................................................
24Notes for UL fuses ............................................................................
25Losses and cooling data ........................................................................
26Typical power cables .............................................................................
26Terminal and entry data for the power cables .............................................
27Protection classes for module .................................................................
27Ambient conditions ..............................................................................
27Safe torque off (STO) ............................................................................
28Wiring ............................................................................................
28Validation .......................................................................................
28Technical data .................................................................................
29Markings ............................................................................................
29Declarations of conformity .....................................................................
29Related documents ..............................................................................
Step-by-step drawings for an installation example
Further information
Table of contents 5

6

Quick installation and start-up
instructions
Contents of this chapter
This chapter tells you briefly how to install the drive module into a cabinet. For more
detailed instructions, engineering guide lines, technical data and complete safety
instructions, see the hardware manual 3AXD50000034664 [English]).
Obey the safety instructions
￭General safety
These instructions are for all personnel who do work on the drive.
WARNING!
Obey these instructions. If you ignore them, injury or death, or damage to the
equipment can occur.
• Keep the drive in its package until you install it. After unpacking, protect the drive
from dust, debris and moisture.
• Use the required personal protective equipment: safety shoes with metal toe cap,
safety glasses, protective gloves and long sleeves, etc. Some parts have sharp
edges.
• Lift a heavy drive with a lifting device. Use the designated lifting points.
• Obey the local laws and regulations applicable to lifting, such as requirements for
planning the lifting, for capacity and condition of lifting equipment, and for training
of personnel.
• Attach the drive cabinet to the floor to prevent it from falling over. The cabinet
has a high center of gravity. Attach the cabinet also to the wall when necessary.
• Do not do work on the drive when a rotating permanent magnet motor is
connected to it. A rotating permanent magnet motor energizes the drive, including
its input and output terminals.
• Make sure that debris from drilling, cutting and grinding does not enter the drive.
Quick installation and start-up instructions 7

￭Electrical safety precautions
These electrical safety precautions are for all personnel who do work on the drive,
motor cable or motor.
WARNING!
Obey these instructions. If you ignore them, injury or death, or damage to the
equipment can occur.
If you are not a qualified electrical professional, do not do installation or
maintenance work.
Do these steps before you begin any installation or maintenance work.
1. Clearly identify the work location and equipment.
2. Disconnect all possible voltage sources. Make sure that re-connection is not
possible. Lock out and tag out.
• Open the main disconnecting device of the drive.
• Open the charging switch if present.
• Open the disconnector of the supply transformer. (The main disconnecting
device in the drive cabinet does not disconnect the voltage from the AC input
power busbars of the drive cabinet.)
• Open the auxiliary voltage switch-disconnector (if present), and all other
possible disconnecting devices that isolate the drive from dangerous voltage
sources.
• If you have a permanent magnet motor connected to the drive, disconnect
the motor from the drive with a safety switch or by other means.
• Disconnect all dangerous external voltages from the control circuits.
• After you disconnect power from the drive, always wait 5 minutes to let the
intermediate circuit capacitors discharge before you continue.
3. Protect any other energized parts in the work location against contact.
4. Take special precautions when close to bare conductors.
5. Measure that the installation is de-energized. Use a quality voltage tester. If the
measurement requires removal or disassembly of shrouding or other cabinet
structures, obey the local laws and regulations applicable to live working (including
– but not limited to – electric shock and arc protection).
• Before and after you measure the installation, verify the operation of the
voltage tester on a known voltage source.
• Make sure that the voltage between the drive input power terminals (L1, L2,
L3) and the grounding (PE) busbar is zero.
• Make sure that the voltage between the drive output terminals (T1/U, T2/V,
T3/W) and the grounding (PE) busbar is zero.
Important! Repeat the measurement also with the DC voltage setting of the
tester. Measure between each phase and ground. There is a risk of dangerous
DC voltage charging due to leakage capacitances of the motor circuit. This
voltage can remain charged for a long time after the drive power-off. The
measurement discharges the voltage.
• Make sure that the voltage between the drive DC terminals (UDC+ and UDC-)
and the grounding (PE) terminal is zero.
6. Install temporary grounding as required by the local regulations.
7. Ask for a permit to work from the person in control of the electrical installation
work.
8 Quick installation and start-up instructions

Select the cables and fuses
Select the power cables. Obey local regulations.
•Input power cable: Use symmetrical shielded cable (VFD cable) for the best EMC
performance. NEC installations: Conduit with continuous conductivity is also
allowed and must be grounded on both ends.
•Motor cable: ABB recommends symmetrically shielded VFD motor cable to reduce
bearing current and wear and stress on motor insulation and to provide the best
EMC performance. Although not recommended, conductors inside continuously
conductive conduit is allowed in NEC installations. Ground conduit on both ends.
Use separate insulated ground from motor to drive inside the conduit.
•Current rating: Max. load current.
•Voltage rating (minimum): IEC installations: 600 V AC cable is accepted for up to
500 V AC, 750 VAC cable is accepted for up to 600 V AC, 1000 V AC cable is accepted
for up to 690 V AC. NEC installations: 600 V AC cable for 230 V AC motors and
1000 V AC cable for 480 V AC and 600 V AC motors. 600 V AC cable for 230 V AC
and 480 V AC power lines; 1000 V AC cable for 600 V AC power line.
•Temperature rating: IEC installations: Select a cable rated for at least 70 °C
maximum permissible temperature of conductor in continuous use. NEC
installations: Use 75 °C conductors minimum. Insulation temperature can be higher
as long as the ampacity is based on 75 °C conductors.
Select the control cables.
• Use double-shielded twisted-pair cable for analog signals. Use double-shielded
or single-shielded cable for the digital, relay and I/O signals. Do not run 24 V and
115/230 V signals in the same cable.
Protect the drive and input power cable with the correct fuses.
For typical power cable sizes, refer to section Typical power cables (page 26).
For the correct fuses, refer to section Fuses (page 23).
Examine the installation site
Examine the installation site. Make sure that:
• The installation site is sufficiently ventilated or cooled to remove heat from the
drive. See the technical data.
• The ambient conditions of the drive meet the specifications. See the technical
data.
• The material behind, above and below the drive is non-flammable.
• There is sufficient free space around the drive for cooling, maintenance, and
operation. See the free space specifications for the drive.
•Make sure that there are no sources of strong magnetic fields such as high-current
single-core conductors or contactor coils near the drive. A strong magnetic field
can cause interference or inaccuracy in the operation of the drive.
Quick installation and start-up instructions 9

Make sure that the drive is compatible with the grounding
system
The standard drive with ground-to-phase varistors connected can be installed to a
symmetrically grounded TN-S system. If you install the drive to another system, you
may need to disconnect the EMC filter and ground-to-phase varistors. See ACS880
frames R1 to R11 EMC filter and ground-to-phase varistor disconnecting instructions
(3AUA0000125152 [English]).
WARNING!
Do not install the drive with EMC filter options +E200 and +E202 to a system
that the filter is not suitable for. This can cause danger, or damage the drive.
WARNING!
Do not install the drive with the ground-to-phase varistor connected to a system
that the varistor is not suitable for. If you do, the varistor circuit can be
damaged.
￭Corner-grounded and midpoint-grounded 525…690 V delta systems
WARNING!
Do not install the drive on a 525…690 V corner-grounded or midpoint-grounded
delta system. Disconnecting the EMC filter and ground-to-phase varistor does
not prevent damage to the drive.
Move the drive to the installation site and unpack it
Unpack the package as follows:
• Cut the bands.
• Lift the top lid. If top boxes (B1) are included, lift them off, and remove the lower
lid.
• Lift the inner and outer sheathings.
• Remove the additional boxes and supports.
10 Quick installation and start-up instructions

7
4
3
1
2
B1
B2
8
3AXD50000040437_assy
12
6
5
9
14
13
10
11
11
A1
A2
B3
Package with no IP20 shrouds for cabling area (option 0B051)A1
Standard drive module packageA2
Drive module with factory installed options, delivery documents, multilingual residual voltage
warning sticker, printed quick installation and start-up guide.
1
Top box B1 bottom (with standard drive module configuration). Contains IP20 shrouds for cabling
area. See below for the box B1 contents.
2
Top box B1 cover3
Outer sheathing4
Inner sheathing5
Accessories box: screw package, spacers for FSO module installation, rubber grommets for control
unit cable entry holes in the middle front cover of the drive module.
6
Accessory sleeve containing:7
• external control unit
• output cable connection terminal box (B2, see below for the box contents)
• input cable connection terminal box (option +H370, B3, see below for the box contents)
• control panel door mounting kit
If all options do not fit in the accessory sleeve, the rest are packed in this space on the drive module8
Cardboard support tray9
Cardboard support10
Cardboard lids11
Wall mounting brackets with screws for attaching the drive module heatsink by the top and bottom
to a mounting plate or wall (option +C217). The brackets bring a gap for cooling air flow and prevent
the drive module screws from chafing the plate.
12
Hood13
Pallet14
Quick installation and start-up instructions 11

Box B1 contents (standard drive module configur-
ation)
Paper fill1
Clear plastic shroud for output power cabling2
Mounting bracket for bottom grille3
Cardboard box bottom4
Cardboard box cover5
Bottom grille6
Support7
Straps8
Screws in a plastic bag9
Back clear plastic shroud (upper)10
Back clear plastic shroud (lower)11
Front clear plastic shroud12
Clear plastic shroud for input power cabling13
Top clear plastic shroud14
Entry clear plastic shroud for side input
cabling
15
Clear plastic bottom shroud 116
Clear plastic bottom shroud 217
Metallic shroud18
3AXD50000013807
1
3 4
5
6 7
8
9
10
11
13
15
17
18
16
14
12
2
Box B2 contents (standard drive module configur-
ation)
Paper fill1
Output cable connection terminal T3/W22
Output cable connection terminal T2/V23
Output cable connection terminal T1/U24
Grounding terminal5
Cardboard box6
Screws and insulators a plastic bag7
3AXD5000009515
2
6
7
5
4
31
12 Quick installation and start-up instructions

Box B3 contents (option +H370)
Metallic shroud with ground bar1
Paper fill2
Input cable connection terminal L3/W13
Input cable connection terminal L2/V14
Input cable connection terminal L1/U15
Cardboard box6
Screws and insulators in a plastic bag7
3AXD5000009522
3
6
4
2
5
1
7
Lift the drive from the lifting points
Refer to image A in section Step-by-step drawings for an installation example (page 31).
Reform the capacitors
If the drive has not been powered up for a year or more, you must reform the DC link
capacitors. Refer to Related documents (page 29) or contact ABB technical support.
Ensure the cooling
See section Losses and cooling data (page 25) for the losses and required cooling air
flow through the drive.
Install the drive module onto a mounting plate
See figure B in chapter Step-by-step drawings for an installation example (page 31).
Install the top metallic shroud and back plastic shrouds
See figures C and D in chapter Step-by-step drawings for an installation
example (page 31).
• Remove the sheeting from the clear plastic shrouds from both sides.
• Install the top metallic shroud to the drive module.
• Install the back shrouds to the drive module.
Measure the insulation resistance of the input and motor
cables and the motor
See figures F and G.
Before you connect the input power cable to the drive, measure its insulation resistance
according to local regulations.
Quick installation and start-up instructions 13

Ground the motor cable shield at the motor end. For minimal interference, make a
360° grounding at the cable entry, or keep the pig tail short.
Measure the insulation resistance of the motor and motor cable when the motor cable
is disconnected from the drive. Measure the insulation resistance between each phase
conductor and the Protective Earth conductor using a measuring voltage of 1000 V DC.
The insulation resistance of an ABB motor must exceed 100 Mohm (reference value
at 25 °C or 77 °F). For the insulation resistance of other motors, consult the
manufacturer’s instructions.
Note: Moisture inside the motor casing will reduce the insulation resistance. If you
suspect moisture, dry the motor and repeat the measurement.
1000 V DC,
>100 Mohm
U1-PE, V1-PE, W1-PE
ohm
M
3~
U1
V1
W1 PE
Connect the power cables and install the shrouds
See the power cable connection diagram (figure E) in chapter Step-by-step drawings
for an installation example (page 31)
FigureTask (motor cables)Step
HInstall the grounding terminal to the drive module base.1
IRun the motor cables to the cabinet. Ground the cable shields 360° at the cabinet
entry.
2
JConnect the twisted shields of the motor cables to the grounding terminal.3
KScrew in and tighten the insulators to the drive module by hand. Install the T3/W2
connection terminal to the insulators.
4
WARNING!
Do not use longer screws or bigger tightening torque than given in
the installation drawing. They can damage the insulator and cause
dangerous voltage to be present at the module frame.
LConnect the phase T3/W2 conductors to the T3/W2 terminal.5
-Install the T2/V2 connection terminal to the insulators. See the warning in step 4.6
-Connect the phase T2/V2 conductors to the T2/V2 connection terminal.7
-Install the T1/U2 connection terminal to the insulators. See the warning in step 4.8
-Connect the phase T1/U2 conductors to the T1/U2 terminal.9
M, N
• Step drill carefully sufficiently big holes to the inner clear plastic shrouds for the
motor cables to the connected. Smooth the hole edges. Cut the shroud from
the holes to the edge to make it possible to put the shroud around the cables.
• Remove the plastic sheeting from the shrouds from both sides.
• Install the inner clear plastic shrouds around the motor cables.
10
PRemove the plastic sheeting from the outer clear plastic shroud from both sides.
Install the shroud to the drive module.
11
PInstall the lower front cover to the drive module.12
14 Quick installation and start-up instructions

FigureTask (input cables)Step
-Ground the input cable shields (if present) 360 degrees at the cabinet entry.1
-Connect the twisted shields of the input cables and separate ground cable (if
present) to the cabinet grounding busbar.
2
O3 • Step drill carefully sufficiently big holes to the clear plastic entry shroud for the
cables to the connected. Align the holes in the vertical direction according to
the alignment holes in the shroud. Smooth the hole edges.
• Remove the plastic sheeting from both sides of the shroud.
• Attach the cables firmly to the cabinet frame to prevent chafing against the hole
edges.
QPut the conductors of the input cables through the drilled holes in the clear plastic
shroud.
4
RConnect the input power cable conductors to the L1/U1, L2/V1 and L3/W1 connection
busbars.
5
SMove the entry clear plastic shroud along input cables to its final position. Install
the front clear plastic shroud and upper front cover. Remove the cardboard protect-
ive covering from the drive module air outlet.
6
TCut the hole for the clear plastic entry shroud in the side clear plastic shroud. Install
the side and top clear plastic shrouds to the drive module.
7
Connect the control cables
See figure U in chapter Step-by-step drawings for an installation example (page 31).
1. Disconnect the control panel cable from connector X13 on the control unit.
2. Loosen the mounting screws of the control panel holder and take the holder off.
3. Install the control cable grounding clamp plate to the control unit.
4. Connect the power supply, BGDR and fiber optic cables to the control unit.
5. Attach the control unit, for example, to a DIN rail.
6. Connect the power supply and BGDR cables to the drive module ZPOW and BGDR
connrctors. Connect the fiber optic cables to V10 and V11 connectors.
7. Ground the outer shields of all external control cables 360° at the cabinet entry.
8. Ground the pair-cable shields of external control cables to a grounding clamp
below the control unit. Leave the other end of the shields unconnected or ground
them indirectly via a high-frequency capacitor with a few nanofarads, eg, 3.3 nF
/ 630 V.
9. Connect the conductors to the appropriate connectors of the control unit.
10. Wire the optional modules if included in the delivery.
11. Connect the control panel cable to connector X13.
12. Put the control panel holder on the control unit. Put the control panel to the recess
if removed.
￭Default I/O connections
The default I/O connections of the Factory macro of the ACS880 primary control
program are shown below.
Quick installation and start-up instructions 15

DescriptionTermConnection
XPOW External power input
24 V DC, 2 A min. (without optional modules)
+24VI
1
2
+24VI
GND
GND
XAI Reference voltage and analog inputs
10 V DC, R
L1…10 kohm+VREF
+VREF
-VREF
AGND
AI1+
AI1-
AI2+
AI2-
1
2
3
4
5
6
7
AI2:I
AI2:U
AI1:I
AI1:U
-10 V DC, R
L1…10 kohm-VREF
GroundAGND
Speed reference
0(2)…10 V, R
in > 200 kohm
AI1+
AI1-
By default not in use.
0(4)…20 mA, R
in = 100 ohm
AI2+
AI2-
Current (I) / voltage (U) selection jumper for AI1J1
Current (I) / voltage (U) selection jumper for AI2J2
XAO Analog outputs
Motor speed rpmAO1
AO1
AGND
AO2
AGND
1
2
3
4
0…20 mA, R
L< 500 ohm
AGND
Motor current
0…20 mA, R
L< 500 ohm
AO2
AGND
XD2D Drive-to-drive link
Master/follower, drive-to-drive or embedded
fieldbus connection
B
1
2
3
B
A
BGND
4Shield
A
BGND
Shield
Drive-to-drive link terminationJ3
XRO1, XRO2, XRO3 Relay outputs
Ready runNC
1
2
3
1
2
3
1
2
3
+24VD
DIOGND
NC
COM
NO
NC
COM
NO
NC
COM
NO
Fault
250 V AC / 30 V DC
2 A
COM
NO
Running
250 V AC / 30 V DC
2 A
NC
COM
NO
Fault (-1)
250 V AC / 30 V DC
2 A
NC
COM
NO
XD24 Auxiliary voltage output, digital interlock
Run enableDIIL
DIIL1
+24VD
DICOM
+24VD
DIOGND
2
3
4
5
+24 V DC 200 mA+24VD
Digital input groundDICOM
+24 V DC 200 mA+24VD
Digital input/output groundDIOGND
16 Quick installation and start-up instructions

DescriptionTermConnection
XDIO Digital input/outputs
Output: Ready runDIO1
1 DIO1
2DIO2
Output: RunningDIO2
Ground selectionJ6
XDI Digital inputs
Stop (0) / Start (1)DI1
1DI1
DI2
DI3
DI4
DI5
DI6
2
3
4
5
6
+24VD
Forward (0) / Reverse (1)DI2
ResetDI3
Acc/Dec time selectDI4
Constant speed 1 (1 = On)DI5
By default, not in use.DI6
Safe torque off circuits must be closed for the drive to start.
XSTO
Safety options connectionX12
Control panel connectionX13
Memory unit connectionX205
The wire size accepted by all screw connectors (for both stranded and solid wire) is
0.5 … 2.5 mm2(24…12 AWG). The torque is 0.5 N·m (5 lbf·in).
Start-up the drive
WARNING!
Before you start up the drive, make sure that the installation is completed.
Make sure also that it is safe to start the motor. Disconnect the motor from
other machinery if there is a risk of damage or injury.
WARNING!
Before you activate the automatic fault reset or automatic restart functions
of the drive control program, make sure that no dangerous situations can
occur. These functions reset the drive automatically and continue operation
after a fault or supply break. If these functions are activated, the installation
must be clearly marked as defined in IEC/EN/UL 61800-5-1, subclause 6.5.3,
for example, "THIS MACHINE STARTS AUTOMATICALLY".
Use the control panel to do the start-up procedure. The two commands at the bottom
of the display show the functions of the two softkeys and located below the
display. The commands assigned to the softkeys are different depending on the
context. Use the arrow keys , , and to move the cursor or change values
depending on the active view. Key
?
shows a context-sensitive help page.
Quick installation and start-up instructions 17

3.2.1.
Select Basic setup and press
(Select).
The First start assistant guides
you through the first start-up.
Select Menu and press (Menu)
to open the main Menu. Select
Assistants and press (Select).
Power up the drive. Make sure
that you have the motor name
plate data available.
6.5.4.
Do the following selections. After
each, press (Next).
Select the localization you want
to use and press (Next).
Select the language you want to
use and press (Next).
Note: After you have selected the
language, it takes a few minutes
for the control panel to wake up.
9.8.7.
12.11.10.
15.14.13.
18 Quick installation and start-up instructions

￭Motor overload protection
The factory motor overload protection is not enabled by default. Motor thermal
overload protection can be measured using motor temperature devices, can be
estimated using a motor model defined by parameters, or can use measured motor
current and motor Class curves. To enable protection using motor model parameters
or measurement devices set parameter 35.11 and subsequent parameters through
35.55. To enable motor Class curves set parameter 35.56. Motor overload Class is
defaulted to 20 and selectable in parameter 35.57.
Use the information key (
?
) on the drive control panel for more information on setting
group 35 parameters. You must set the drive overload parameters correctly, or motor
damage could occur.
￭Fieldbus communication
To configure the embedded fieldbus communication for Modbus RTU, you must set
at least these parameters:
DescriptionSettingParameter
Selects fieldbus as the source for the start and stop
commands when EXT1 is selected as the active control
location.
Embedded fieldbus20.01 Ext1 commands
Selects a reference received through the embedded
fieldbus interface as speed reference 1.
EFB ref122.11 Speed ref1 source
Selects a reference received through the embedded
fieldbus interface as torque reference 1.
EFB ref126.11 Torque ref1 source
Selects a reference received through the embedded
fieldbus interface as frequency reference 1.
EFB ref128.11 Frequency ref1
source
Initializes embedded fieldbus communication.Modbus RTU58.01 Protocol enable
Node address. There must be no two nodes with the
same node address on-line.
1 (default)58.03 Node address
Defines the communication speed of the link. Use the
same setting as in the master station.
19.2 kbps (default)58.04 Baud rate
Selects the parity and stop bit setting. Use the same
setting as in the master station.
8 EVEN 1 (default)58.05 Parity
Validates any changed EFB configuration settings. Use
this after changing any parameters in group 58.
Refresh settings58.06 Communication
control
Other parameters related to the fieldbus configuration:
58.34 Word order58.28 EFB act1 type58.17 Transmit delay58.14 Communication
loss action
Quick installation and start-up instructions 19

58.101 Data I/O 1
…
58.124 Data I/O 24 time
58.31 EFB act1 transpar-
ent source
58.25 Control profile58.15 Communication
loss mode
58.33 Addressing mode58.26 EFB ref1 type58.16 Communication
loss time
￭Warnings and faults
DescriptionAux. codeFaultWarning
Warning: Current calibration is done at the next start.Current calibration2281A2A1
Fault: Output phase current measurement fault.
The output current is more than the internal limit. This can
also be caused by an earth fault or phase loss.
Overcurrent2310-
A load unbalance that is typically caused by an earth fault in
the motor or the motor cable.
Earth leakage2330A2B3
There is a short-circuit in the motor or the motor cable.Short circuit2340A2B4
The intermediate DC circuit voltage oscillates due to missing
input power line phase.
Input phase loss3130-
Incorrect input and motor cable connection.Wiring or earth fault3181-
Intermediate DC circuit voltage is too high.DC link overvoltage3210A3A1
Intermediate DC circuit voltage is too low.DC link under-
voltage
3220A3A2
All three phases are not connected to the motor.Output phase loss3381-
STO hardware diagnostics has detected hardware failure.
Contact ABB.
STO hardware fail-
ure
5090-
The Safe torque off (STO) function is active.Safe torque off5091A5A0
Break in embedded fieldbus communication.EFB comm loss6681A7CE
Communication lost between drive (or PLC) and fieldbus ad-
apter.
FBA A communica-
tion
7510A7C1
The I/O extension module types and locations specified by
parameters do not match the detected configuration.
Extension I/O con-
figuration failure
-ACAB
The motor ID run occurs at the next start.Identification run-AFF6
The Safe torque off circuit 1 is broken.Safe torque off 1
loss
FA81-
The Safe torque off circuit 2 is broken.afe torque off 2 lossFA82-
20 Quick installation and start-up instructions