ABB ACH550 series User manual

User’s Manual
E-Bypass Configurations (BC, BD, VC, or VD) for
ACH550 Drives (1…400 HP)

ii E-Bypass Configurations for ACH550 Drives
ACH550 Drive Manuals
GENERAL MANUALS
ACH550-UH HVAC User's Manual (1…550 HP)
• Safety
• Installation
• Start-Up
• Embedded Fieldbus
• Fieldbus Adapter
• Diagnostics
• Maintenance
• Technical Data
Input Disconnect Configurations (PC or PD) for
ACH550 Drives (1…550 HP)
• Safety
• Installation
• Start-Up
• Technical Data
E-Bypass Configurations (BC, BD, VC or VD) for
ACH550 Drives (1…400 HP)
• Safety
• Installation
• Start-Up
• Technical Data
©
2004, 2005 ABB Inc. All Rights Reserved.

E-Bypass Configurations for ACH550 Drives 1
Safety
Safety
WARNING! The ACH550 adjustable speed AC drive with E-Bypass should
ONLY be installed by a qualified electrician.
WARNING! Even when the motor is stopped, dangerous voltage is present at
the Power Circuit terminals U1, V1, W1 and U2, V2, W2 and, depending on the
frame size, UDC+ and UDC-, or BRK+ and BRK-.
WARNING! Dangerous voltage is present when input power is connected.
After disconnecting the supply, wait at least 5 minutes (to let the intermediate
circuit capacitors discharge) before removing the cover.
WARNING! Even when power is removed from the input terminals of the
ACH550, there may be dangerous voltage (from external sources) on the
terminals of the relay outputs.
WARNING! When the control terminals of two or more drive units are
connected in parallel, the auxiliary voltage for these control connections must
be taken from a single source which can either be one of the units or an
external supply.
WARNING! The ACH550 will start up automatically after an input voltage
interruption if the external run command is on.
WARNING! When the ACH550 with E-Bypass is connected to the line power,
the Motor Terminals T1, T2, and T3 are live even if the motor is not running. Do
not make any connections when the ACH550 with E-Bypass is connected to
the line. Disconnect and lock out power to the drive before servicing the drive.
Failure to disconnect power may cause serious injury or death.
Note! For more technical information, contact the factory or your local ABB sales
representative.

2 E-Bypass Configurations for ACH550 Drives
Safety
Use of Warnings and Notes
There are two types of safety instructions throughout this manual:
• Notes draw attention to a particular condition or fact, or give information on a
subject.
• Warnings caution you about conditions which can result in serious injury or death
and/or damage to the equipment. They also tell you how to avoid the danger. The
warning symbols are used as follows:
Dangerous voltage warning warns of high voltage which can cause physical
injury and/or damage to the equipment.
General warning warns about conditions, other than those caused by
electricity, which can result in physical injury and/or damage to the equipment.

E-Bypass Configurations for ACH550 Drives 3
Table of Contents
Table of Contents
Safety
Use of Warnings and Notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Table of Contents
Installation
Application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
E-Bypass Features and Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Installation Flow Chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Preparing for Installation (Supplement to ACH550-UH User’s Manual) . . . . . . . 7
Installing the Wiring (Supplement to ACH550-UH User’s Manual) . . . . . . . . . . 8
Check E-Bypass Jumpers, Switches and Pots . . . . . . . . . . . . . . . . . . . . . . . . 19
Start-up
Bypass Control Panel Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Operating Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Bypass Control Board Inputs and Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
ACH550 Drive Inputs and Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
The Bypass Application Macro . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Technical Data
Input Power Connections (Supplement to ACH550-UH User’s Manual) . . . . . 37
Motor Connections (Supplement to ACH550-UH User’s Manual) . . . . . . . . . . 44
E- Bypass Control Panel Connections
(Supplement to ACH550-UH User’s Manual) . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Dimensions and Weights (Supplement to ACH550-UH User’s Manual) . . . . . 46
Applicable Standards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Index

4 E-Bypass Configurations for ACH550 Drives
Installation
Installation
Study these installation instructions carefully before proceeding. Failure to observe
the warnings and instructions may cause a malfunction or personal hazard.
WARNING! Before you begin read "Safety" on page 1.
WARNING! When the ACH550 with E-Bypass is connected to the line power,
the Motor Terminals T1, T2, and T3 are live even if the motor is not running. Do
not make any connections when the ACH550 with E-Bypass is connected to
the line. Disconnect and lock out power to the drive before servicing the drive.
Failure to disconnect power may cause serious injury or death.
Application
This manual is a supplement to the ACH550-UH User’s Manual and documents
E-Bypass configurations.
E-Bypass Features and Functions
The ACH550 with E-Bypass is an ACH550 AC adjustable frequency drive in an
integrated UL type 1 or UL type 12 package with a bypass motor starter. The
ACH550 with E-Bypass provides:
• Disconnect switch or circuit breaker with door mounted control lever. The lever
can be padlocked in the OFF position (padlock not supplied).
• Bypass starter.
• Motor overload protection.
• Local operator keypad with indicating lights.
• Provisions for external control connections.
• Optional drive service switch (drive input disconnect), the functional equivalent of
a three-contactor bypass arrangement.

E-Bypass Configurations for ACH550 Drives 5
Installation
The following shows the front view of the ACH550 E-Bypass vertical configuration,
and identifies the major components.
The following shows the front view of the ACH550 E-Bypass standard
configurations, and identifies the major components.
BP0091 E-Bypass
Bypass Keypad
Operating Handle
for Disconnect Switch
or Circuit Breaker
ACH-CP-B
Control Panel
ACH550 Drive
BP0092
ACH-CP-B
Bypass Keypad
Operating Handle
ACH550 Drive
Control Panel
for Disconnect Switch
or Circuit Breaker
E-Bypass
E-Bypass
(R1 … R6)
(R7, R8)

6 E-Bypass Configurations for ACH550 Drives
Installation
The following is a typical power diagram.
Installation Flow Chart
The installation of E-Bypass Configurations for ACH550 drives follows the outline
below. The steps must be carried out in the order shown. At the right of each step
are references to the detailed information needed for the correct installation of the
unit.
Task Reference in ACH550-UH User’s Manual
“Installation” section Reference in this Manual
PREPARE for
installation “Preparing for Installation” "Drive Identification" on page 7.
"Suitable Mounting Location
(Supplement to ACH550-UH User’s
Manual)" on page 8
PREPARE the Mounting
Location “Prepare the Mounting Location” --
REMOVE the front cover “Remove Front Cover” --
MOUNT the drive “Mount the Drive” --
INSTALL wiring “Wiring Overview” and
“Install the Wiring” "Installing the Wiring (Supplement to ACH550-UH User’s Manual)"
starting on page 8.
CHECK jumpers,
switches and pots -- "Check E-Bypass Jumpers, Switches and Pots" on page 19.
CHECK installation “Check Installation” "Keypad Control Tests" on page 16.
RE-INSTALL the cover “Re-install Cover” --
APPLY power “Apply Power” --
START-UP “Start-Up” "Start-up" on page 24.
ACH550
Drive with E-Bypass
Motor
3 Phase Drive 3
3
Disconnect Switch
or Circuit Breaker
Service Switch
(Optional)
Input Power
Bypass
Contactor
Bypass
Control Drive Output
Contactor

E-Bypass Configurations for ACH550 Drives 7
Installation
Preparing for Installation (Supplement to ACH550-UH User’s Manual)
Drive Identification
Drive Labels
To determine the type of drive you are installing, refer to either:
• Serial number label attached on
upper part of the chokeplate
between the mounting holes.
• Type code label attached on the
heat sink – on the right side of the
unit cover.
Type Code
Use the following chart to interpret the type code found on either label.
Ser. no.
ACH550-BC-316A-4
*2030700001*
U1
I2N
PN 100 A
400
3~ 200...280 V
2042500001
Input
Voltage (U1)
Current (I1ND)
3 Phase 48…63 Hz
200…240 V
100 A
1 Phase 48…63 Hz
200…240 V
100 A
Output
Voltage (U2)
Current (I2ND)
3 Phase 48…63 Hz
0…Input Voltage (U1)
100 A
1 Phase 48…63 Hz
0…Input Voltage (U1)
100 A
ULType 12 / IP54
ACH550–BC–100A–2+K454+L502+L503+N661+P901
Nominal Motor
Power (PND)
Short Circuit Rating Mfg. Date: June 10, 2004 Org. Firmware: V.2.03B
ABB Inc.
Made in USA with foreign parts
OEM Part Number
15 HP
100 kAIC
400 HP
100 kAIC
ACH550-BC-316A-4+…+…
AC, HVAC Drive – 550 product series
4 = 380…480 VAC
BC = E-Bypass with circuit breaker
2 = 208…240 VAC
Construction
Output current rating (See Ratings chart for details)
Voltage rating
UH = Base drive
Enclosure protection class
No specification = IP 21 / UL type 1
+B055 = IP 54 / UL type 12
BD = E-Bypass with disconnect switch
PC = Drive with circuit breaker
PD = Drive with disconnect switch
VC = Vertical E-Bypass with circuit breaker
VD = Vertical E-Bypass with disconnect switch
Line reactor
+E213 = Line Reactor
Service Switch
+F267 = Service switch
Fieldbus Adapters
+K451 = DeviceNet Adapter
+K452 = LonWorks Adapter
+K454 = Profibus Adapter
6 = 500…600 VAC

8 E-Bypass Configurations for ACH550 Drives
Installation
Ratings and Frame Size
The chart in the “Ratings” section of the ACH550-UH User’s Manual lists technical
specifications, and identifies the drive’s frame size – significant, since some
instructions in this document vary, depending on the drive’s frame size. To read the
Ratings table, you need the “Output current rating” entry from the type code (see
above). Also, when using the Ratings tables, note that there are two tables based on
the drive’s “Voltage rating”.
Suitable Mounting Location (Supplement to ACH550-UH User’s Manual)
In selecting a suitable mounting location for E-Bypass configurations, refer to the
Technical Data in this manual for the appropriate information on:
• Branch circuit protection
• Dimensions and weights
Installing the Wiring (Supplement to ACH550-UH User’s Manual)
WARNING!
• Do not connect or disconnect input or output power wiring, or control
wires, when power is applied.
• Never connect line voltage to drive output Terminals T1, T2, and T3.
• Do not make any voltage tolerance tests (Hi Pot or Megger) on any part of
the unit. Disconnect motor wires before taking any measurements in the
motor or motor wires.
• Make sure that power factor correction capacitors are not connected
between the drive and the motor.
Wiring Requirements
Refer to the “Wiring Requirements” Section in the ACH550 User’s Manual. The
requirements apply to all ACH550 drives. In particular:
• Use separate, metal conduit runs to keep these three classes of wiring apart:
– Input power wiring.
– Motor wiring.
– Control/communications wiring.
• Properly and individually ground the drive, the motor and cable shields.

E-Bypass Configurations for ACH550 Drives 9
Installation
Wiring Overview (Supplement to ACH550-UH User’s Manual)
Connection Diagrams – Vertical E-Bypass
ACH550 Vertical E-Bypass units are configured for wiring access from the bottom
only. The following figure shows the Vertical E-Bypass wiring connection points.
Refer to the ACH550-UH User's Manual for control connections to the drive.
BP0054
ACH550
E-Bypass
Control Board
Terminals (X2)
Disconnect Switch
or Circuit Breaker
Output
Input Power Cable
Ground
Lug(s)
Terminals
Service Switch
(Optional)
Terminals
Input
Ground
Output
Ground
Output
Terminals
Service Switch
(Optional)
R2 R4

10 E-Bypass Configurations for ACH550 Drives
Installation
Connection Diagrams – Standard E-Bypass (Wall Mounted)
ACH550 Standard E-Bypass units are configured for wiring access from the top. The
following figure shows the Standard E-Bypass (wall mounted) wiring connection
points. Refer to the ACH550-UH User's Manual for control connections to the drive.
BP0051
ACH550
Motor
Input Power
Ground
Lug(s)
Terminals
E-Bypass
Control Board
Terminals (X2)
Terminals
Motor
Terminals
Ground
Lug(s)
Disconnect Switch
or Circuit Breaker
Disconnect Switch
or Circuit Breaker
R1…R4 R5/R6
Service Switch
(Optional)

E-Bypass Configurations for ACH550 Drives 11
Installation
Connection Diagrams – Standard E-Bypass (R7/R8, Floor Mounted)
ACH550 Standard E-Bypass units are configured for wiring access from the top. The
following figure shows the Standard E-Bypass (floor mounted) wiring connection
points. Refer to the ACH550-UH User's Manual for control connections to the drive.
BP0056
ACH550
Input Power
Ground Lug
Bar
Terminals
E-Bypass
Control Board
Terminals (X2)
BP0055
Disconnect Switch
or Circuit Breaker
Motor
Terminals
Ground Lug
Bar
Service
Switch
(Optional)
ACH550
Control Board
Terminals (X1)
BP0054 BP0056
R8
ACH550
R7
Disconnect Switch
or Circuit Breaker
Motor
Terminals
I
nput Power
Terminals

12 E-Bypass Configurations for ACH550 Drives
Installation
Install the Line Input Wiring (Supplement to ACH550-UH User’s Manual)
Line Input Connections – Vertical E-Bypass
Configurations
Connect the input power to the terminals
at the bottom of the disconnect switch or
circuit breaker as shown below. Also see
"Connection Diagrams – Vertical
E-Bypass" on page 9. Connect the
equipment grounding conductor to the
ground lug near the input power
connection point.
Line Input Connections – Standard E-Bypass Configurations
Connect input power to the terminals of the disconnect switch or circuit breaker.
Connect the equipment grounding conductor to the ground lug at the top of the
enclosure. The figure below shows the connection points for Standard E-Bypass
configurations. Also see "Connection Diagrams – Standard E-Bypass (R7/R8, Floor
Mounted)" on page 11 for R7 or R8.
WARNING! Check the motor and motor wiring insulation before connecting
the ACH550 to line power. Follow the procedure in the ACH550-UH User’s
Manual. Before proceeding with the insulation resistance measurements,
check that the ACH550 is disconnected from incoming line power. Failure to
disconnect line power could result in death or serious injury.
BP0044
Input Power Cables
Ground
BP0041
BP0043
Standard Configuration (R1…R4)
Input Power Cable
Gnd
Standard Configuration (R5, R6)

E-Bypass Configurations for ACH550 Drives 13
Installation
Install the Motor Wiring (Supplement to ACH550-UH User’s Manual)
Motor Connections – Vertical E-Bypass
Configurations
Connect the motor cables to the terminals at
the bottom of the bypass section as shown in
the figure below. Also see "Connection
Diagrams – Vertical E-Bypass" on page 9.
Connect the motor grounding conductor to
the ground lug near the motor cable terminal
block connection point.
Motor Connections – Standard E-Bypass
Configurations
Connect the motor cables to the output terminal block as shown in the figure below.
Also see "Connection Diagrams – Standard E-Bypass (R7/R8, Floor Mounted)" on
page 11 for R7 or R8. The motor grounding conductor can be connected to the
ground lug near the terminal block.
Install the Control Wiring (Supplement to ACH550-UH User’s Manual)
Connect control wiring to terminal block X1 on the ACH550 control board and to
terminal block X2 on the E-Bypass control board. For more information on these
connections, refer to the following:
• X1 terminal block location and terminal data are defined in the ACH550-UH
User’s Manual.
• X2 terminal block location is illustrated in the figures starting with "Connection
Diagrams – Vertical E-Bypass" on page 9.
BP0044
Motor Cables
Gnd
BP0041
BP0043
Standard Configuration (R1…R4)
Motor Cables
Gnd
Standard Configuration (R5, R6)
Gnd

14 E-Bypass Configurations for ACH550 Drives
Installation
• X2 terminal data are provided in "Basic Control Connections for Separate Drive
Run & Bypass Run Commands" on page 15.
• Basic connections are described in the following paragraphs.
• Alternate configurations using the E-Bypass macro are described in "The Bypass
Application Macro" on page 32.
• On Terminal Block X1 inside the ACH550, analog inputs and outputs and
additional digital input and relay output connections (AI1, AI2, AO1, AO2, DI3,
DI4, DI5, DI6 and RO2) are available for use. Refer to the ACH550-UH User’s
Manual for information about control connections on Terminal Block X1.
Note! The E-Bypass control circuitry uses inputs and outputs DI1, DI2, RO1 and
RO3 (X2:7…X2:14). These inputs and outputs are not available for any other
purpose and must not be reconfigured.
Basic Connections
The figure below shows the basic control connections for use with the E-Bypass
macro. These connections are described in the following paragraphs.
In typical installations, only serial communications and analog input wires connect to
the ACH550 terminal block, with other control connections made on the E-Bypass
control board.

E-Bypass Configurations for ACH550 Drives 15
Installation
Basic Control Connections for Separate Drive Run & Bypass Run Commands
Parameter Number Description Setting
1001 EXTERNAL 1 COMMANDS 1 (DI1)
1002 EXTERNAL 2 COMMANDS 1 (DI1)
1601 RUN ENABLE 2 (DI2)
1401 RELAY OUTPUT 1 7 (STARTED)
1403 RELAY OUTPUT 3 3 (FAULT (-1))
X1 Terminals on ACH550 Control Board
1 Terminal for signal cable shield
2 Analog Input Channel 1
3 Analog Input Common
4 10 V / 10 mA Reference voltage for potentiometer
15 Digital Input 3
16 Digital Input 4
17 Digital Input 5
18 Digital Input 6
X2 Terminals on E-Bypass Control Board
1 Start/Stop
2 Run Enable
3 Safety Interlocks
4 Override 1 – Fireman’s Override
5 Override 2 – Bypass Override
6 I/O Power Supply – Not used
7 ACH550 24V voltage supply Pre-wired to
ACH550
terminal block
X1.
Do NOT
disturb.
8 Start/Stop 2
9 Run Enable 2
10 Safety Output
11 Drive RO3 – N.O.
12 Drive RO3 – Com
13 Drive RO1 – N.C.
14 Drive RO1 – Com
15 Common – Use only with Internal 24 VDC Supply.
16 RO1 – Bypass Fault – N. C.
17 RO1 – Bypass Fault – N. O.
18 RO1 – Bypass Fault – Com
19 RO2 – System Run – N. C.
20 RO2 – System Run – N. O.
21 RO2 – System Run – Com
22 RO3 – System Started – N. C.
23 RO3 – System Started – N. O.
24 RO3 – System Started – Com
25 RO4 – Mode/Override – N. C.
26 RO4 – Mode/Override – N. O.
27 RO4 – Mode/Override – Com
28 RO5 – Drive Fault – N. C.
29 RO5 – Drive Fault – N. O.
30 RO5 – Drive Fault – Com
31 RO6 – Hand/Off/Auto – N. C.
32 RO6 – Hand/Off/Auto – N. O.
33 RO6 – Hand/Off/Auto – Com
ACH550 Drive
E-Bypass
Internally
Supplied
24 VDC
Drive Run
Bypass Run
Jumper J3
Internal
24 VDC
Powered
I/O
External
110 VAC
Powered
I/O
1 2 1 2

16 E-Bypass Configurations for ACH550 Drives
Installation
Keypad Control Tests
Apply power to the E-Bypass unit. The display should show the operating status of
the drive. If the motor is a standard 208 V, 60 Hz motor connected to a 208 V drive or
a 480 V, 60 Hz motor connected to a 480 V drive, the default parameter settings
should be suitable for the initial tests described below. If the motor’s rating is not
208 V or 480 V, 60 Hz, the MOTOR NOM VOLT and MOTOR NOM FREQ
parameters will need to be properly set before proceeding. Refer to the ACH550-UH
User’s Manual and set the parameters as required.
The only macro that provides the proper configuration settings by default is the
E-Bypass macro. If any other macro is used, that macro should be selected after
completing the initial tests. When using any other macro the following parameter
values must be set or portions of the E-Bypass will not function properly:
• Parameter 1001 must be set to “DI1”
• Parameter 1002 must be set to “DI1”
• Parameter 1601 must be set to “DI2”
• Parameter 1401 (RO1) must be set to “Started”
• Parameter 1403 (RO3) must be set to “Fault (-1)”
Refer to the ACH550-UH User’s Manual for additional information.
Test: Motor Disconnected from the ACH550 with E-Bypass
After setting the Start-up Data parameters, test and become familiar with the
operation of the ACH550 Drive with E-Bypass without the motor connected as
follows:
1. Disconnect and lock out power to the E-Bypass unit, wait at least five minutes after
disconnecting power.
2. Disconnect the motor from the E-Bypass unit.
3. Apply power to the E-Bypass unit by turning on the branch circuit disconnect device
and the bypass disconnect switch or circuit breaker.
4. The ACH550 Control Panel display should be illuminated. On the bypass keypad,
the Ready LED and Enable LED should be illuminated. If the Enable LED is not
illuminated, check to see that closed contacts or jumpers connect terminal X2:2 and
X2:3, on the bypass control board, to terminal X2:15.
5. Either the Drive Selected or Bypass Selected LED should be illuminated. Pressing
the Drive Select or Bypass Select key should switch the bypass back and forth
between the Drive mode and the Bypass mode as indicated by the LEDs above
each button. Check that the bypass keypad switches the system between modes.
Leave the system in the Bypass mode when proceeding to the next step.
6. Check to see that pressing the Auto key on the bypass keypad causes the Auto LED
to be illuminated, pressing the Hand key causes the Hand LED to be illuminated and
pressing the OFF key causes either the Hand or Auto LED to go off. Leave the Hand
and Auto LEDs off when proceeding to the next step.
7. For Steps 8 through 13 Parameter 9904 must be set to “Scalar: Freq”. After
successful completion of Step 12, Parameter 9904 may be set to “Vector: Speed” if

E-Bypass Configurations for ACH550 Drives 17
Installation
very specific application requirements make it necessary to use this type of motor
control. Operation using the “Vector: Speed” setting is unnecessary for control of
almost all fan and pump applications. Refer to the ACH550-UH User's Manual for
details on setting parameters.
8. Press the Drive Select key on the bypass keypad. The Drive Select LED should be
illuminated.
9. Press the HAND key on the ACH550 keypad. Note that the bottom line of the display
indicates “HAND” and “RUN” and a Right Arrow. The Drive Run LED on the Bypass
keypad should be illuminated.
10. Press the UP arrow. Note that the reference frequency indication in the top line of
the display increases from “0.0 Hz.” The large actual output frequency indication in
the center line of the display should also increase from “0.0 Hz.”
11. In the top line of the display, the output current indication should indicate “0.0 A” and
the torque indication should indicate “0%.”
12. Press the DOWN arrow until the frequency indications return to “0.0 Hz.”
13. Press the OFF key. Note that the bottom line of the display indicates “Off.”
If the ACH550 Drive and E-Bypass operate according to these steps, disconnect and
lock out power to prepare for the next test.
WARNING! Wait at least five minutes after disconnecting power from the drive
before you attempt to service the drive. Bus capacitors in the intermediate DC
circuit must discharge before servicing the drive. Using a meter rated for 1000
VDC, check for zero volts at:
•Terminals BRK+ and BRK- (frame size R1/R2)
• Terminals UC+ and UC- (frame size R3…R8).
If the drive does not operate according to these steps, refer to the ACH550-UH
User’s Manual.
Test: Motor Connected to the E-Bypass
After successfully testing the drive with the motor disconnected, continue testing the
drive as follows:
1. Disconnect and lock out power to the E-Bypass unit.
2. Connect the motor to the output terminals.
CAUTION: If the Fireman’s Override (Override 1) input contact is closed, the
motor will start across the line as soon as power is applied.
If the Safety Interlock and Run Enable input contacts are closed and the
Bypass Override (Override 2) input contact is closed, the motor will start
across the line as soon as power is applied.
If the Start/Stop, Safety Interlock and Run Enable input contacts are closed
and the system is in the Bypass mode and in either Hand or Auto, the motor
will start across the line as soon as power is applied.

18 E-Bypass Configurations for ACH550 Drives
Installation
If the Start/Stop, Safety Interlock and Run Enable input contacts are closed
and the system is in the Drive mode with the drive in either Hand or Auto
mode, the motor will start on the drive as soon as power is applied.
In order to prevent the motor from starting, the system should be in the Drive
mode and the drive should be OFF when the power is disconnected at the end
of the previous series of tests with the motor disconnected.
In order to prevent the motor from running without disconnecting the motor,
open the Run Enable and Safety Interlock contacts on bypass control board
terminals X2:2, X2:3 and X2:4 before applying power. Set the bypass to Drive
mode and the drive to OFF.
3. Apply power to the E-Bypass unit.
4. Press the Hand key on the ACH550 control panel.
CAUTION: Check motor rotation direction as soon as the motor begins to
move. If motor does not rotate in the correct direction, shut down the drive,
disconnect and lock out power to the drive and wait five minutes. Swap any
two motor output wires (T1, T2, and T3). Incorrect motor rotation direction may
cause equipment damage.
5. Slowly increase the output frequency by pressing the UP ARROW key. Verify that
motor speed varies as frequency varies.
6. Increase the speed to 60 Hz or the highest safe operating speed.
7. Measure the output current in all three phases. The current should be balanced, and
should not exceed the motor or drive rating.
8. Press the OFF key on the ACH550 control panel. The motor should stop.
CAUTION: Check the motor rotation direction in bypass.
Press the OFF key and then the Bypass Select key on the bypass keypad.
Press the Hand key and then quickly press the OFF key to “bump” the motor. If
the motor turns in the wrong direction, tag out/lock out, then swap any two
input power leads at the disconnect switch. Do not swap the motor leads.
If the drive does not operate according to these steps, refer to the ACH550-UH
User’s Manual.
If the drive operates according to these steps, your ACH550 with E-Bypass is ready
to use with preset or modified macro settings. Refer to the ACH550-UH User’s
Manual for programming instructions.
9. Perform the Keypad Control Test before connecting the motor. Refer to "Keypad
Control Tests" on page 16.