ABB ACH550-UH HVAC User manual

Type
User manual

This manual is also suitable for

ACH550
User’s Manual
ACH550-01 Drives (0.75
…110 kW)
ACH550-UH Drives (1
…150 HP)
ABB
ACH550 Drive manuals
GENERAL MANUALS
ACH550-01/UH User's Manual
(0.75…110 kW) / (1…150 HP)
3AFE68258537 (English)
ACH550-02/U2 User's Manual
(110… 355 kW) / (150… 550 HP)
3AFE68262674 (English)
• Safety
• Installation
• Start-up
• Diagnostics
• Maintenance
• Technical data
HVAC Info Guide CD
3AFE68338743 (English)
• Detailed product description
– Technical product description
including dimensional
drawings
– Cabinet mounting information
including power losses
– Software and control
– User interfaces and control
connections
– Complete options descriptions
– Spare parts
–Etc.
• Practical engineering guides
– PID & PFA engineering
guides
– Dimensioning and sizing
guidelines
– Diagnostics and maintenance
information
–Etc.
OPTION MANUALS
(delivered with optional equipment)
Embedded Fieldbus (EFB)
Control Manual
3AFE68320658 (English)
Embedded Fieldbus (EFB)
Control/BACnet Manual
3AFE68404550 (English)
OHDI-01 115/230 V Digital Input
Module User's Manual
3AUA0000003101 (English)
OREL-01 Relay Output Extension
Module User's Manual
3AUA0000001935 (English)
RLON-01 LonWorks Adapter
Module User’s Manual
3AFE64798693 (English)
Typical contents
• Safety
•Installation
• Programming/Start-up
• Fault tracing
• Technical data
MAINTENANCE MANUALS
Guide for Capacitor Reforming in
ACS50/150/350/550
3AFE68735190 (English)
Update Notice
1
Update Notice
NEW PARAMETERS AND PARAMETER VALUES
This new group defines supervision of user adjustable load curves (motor torque as
a function of frequency). The curve is defined by five points. - The function replaces
deleted underload parameters 3013…3015.
The notice concerns ACH550-01/UH User’s Manual Code: 3AFE68802547 Rev A
Valid: from 01.11.2006 until the release of Rev D of the
manual
Contents: the main new features and changes which are not
yet updated to the manual. (Some features are already
included in Rev C, which is available in English only.) The
sections have a label NEW
(= new feature), or CHANGE (=
changed feature), or DELETED (= deleted feature).
A summary of the updates is given below.
NEW: Parameters and parameter values
380...480 V types
DELETED: Underload parameters
Code Description
3701 USER LOAD C MODE
Supervision mode for the user adjustable load
curves. This functionality replaces the former
underload supervision in Group 30: FAULT
FUNCTIONS.
0 =
NOT SEL – Supervision is not active.
1 =
UNDERLOAD – Supervision for the torque
dropping below the underload curve.
2 =
OVERLOAD – Supervision for the torque
exceeding the overload curve.
3 = BOTH – Supervision for the torque dropping
below the underload curve or exceeding the
overload curve.
3702 USER LOAD C FUNC
Action wanted during load supervision.
1 =
FAULT – A fault is generated when the condition defined by 3701 USER LOAD C MODE has been valid longer than
the time set by 3703
USER LOAD C TIME.
2 =
ALARM – An alarm is generated when the condition defined by 3701 USER LOAD C MODE has been valid longer than
half of the time defined by 3703
USER LOAD C TIME.
Code Revision Language
3AFE68258537 C
English EN
3AFE68288843 B
Danish DA
3AFE68265525 B
German DE
3AFE58288851 B
Spanish ES
3AFE68288878 B
Finnish FI
3AFE68288886 B
French FR
3AFE68288908 B
Italian IT
3AFE68288916 B
Dutch NL
3AFE68288924 B
Portuguese PT
3AFE68288932 B
Russian RU
3AFE68288941 B
Swedish SV
Overload area
Underload area
Allowed operating area
P3706
P3705
P3704
P3709
P3708
P3707
P3712
P3711
P3710
P3715
P3714
P3713
P3718
P3717
P3716
Motor torque (%)
Output frequency (Hz)
Update Notice
2
FlashDrop
3703 USER LOAD C TIME
Defines the time limit for generating a fault. Half of this time is used as the limit for generating an alarm.
3704 LOAD FREQ 1
Defines the frequency value of the first curve definition point. Must be smaller than 3707
LOAD FREQ 2.
3705 LOAD TORQ LOW 1
Defines the torque value of the first underload curve definition point. Must be smaller than 3706
LOAD TORQ HIGH 1.
3706 LOAD TORQ HIGH 1
Defines the torque value of the first overload curve definition point.
3707 LOAD FREQ 2
Defines the frequency value of the second curve definition point. Must be smaller than 3710
LOAD FREQ 3.
3708 LOAD TORQ LOW 2
Defines the torque value of the second underload curve definition point. Must be smaller than 3709
LOAD
TORQ
HIGH
2.
3709 LOAD TORQ HIGH 2
Defines the torque value of the second overload curve definition point.
3710 LOAD FREQ 3
Defines the frequency value of the third load curve definition point.
3711 LOAD TORQ LOW 3
Defines the torque value of the third underload curve definition point.
Must be smaller than 3712
LOAD
TORQ
HIGH
3.
3712 LOAD TORQ HIGH 3
Defines the torque value of the third overload curve definition point.
3713 LOAD FREQ 4
Defines the frequency value of the fourth load curve definition point.
3714 LOAD TORQ LOW 4
Defines the torque value of the fourth underload curve definition point.
Must be smaller than 3715
LOAD
TORQ
HIGH
4.
3715 LOAD TORQ HIGH 4
Defines the torque overvalue of the fourth load curve definition point.
3716 LOAD FREQ 5
Defines the frequency value of fifth load curve definition point.
3717 LOAD TORQ LOW 5
Defines the torque value of the fifth underload curve definition point.
Must be smaller than 3718
LOAD
TORQ
HIGH
5.
3718 LOAD TORQ HIGH 5
Defines the torque value of the fifth overload curve definition point.
1611 PARAMETER VIEW
Selects the parameter view, i.e. which parameters are shown.
Note: This parameter is visible only when it is activated by the optional FlashDrop device. FlashDrop allows fast
customization of the parameter list, e.g. selected parameters can be hidden. For more information, see MFDT-01
FlashDrop User’s Manual [3AFE68591074 (English)].
FlashDrop parameter values are activated by setting parameter 9902 to 31 (
LOAD FD SET).
0 =
DEFAULT – Complete long and short parameter lists are shown.
1 =
FLASHDROP – FlashDrop parameter list is shown. Does not include short parameter list. Parameters that are
hidden by the FlashDrop device are not visible.
9902 APPLIC MACRO
31 =
LOAD FD SET – FlashDrop parameter values as defined by the FlashDrop file. Parameter view is selected by
parameter 1611
PARAMETER VIEW.
Code Description
Update Notice
3
Drive control board (CB) temperature.
PFA control
Start/Stop
0150 CB TEMP
Temperature of the drive control board in degrees Celsius/Fahrenheit.
Note: Some drives have a control board (OMIO) that does not support this feature. These drives always show the
constant value of 25.0 ºC.
3024 CB TEMP FAULT
Defines the drive response to control board overheating.
0 =
DISABLE – No response
1 =
ENABLE – Displays fault 37 (CB OVERTEMP) and the drive coasts to stop.
8118 AUTOCHNG INTERV
-0.1 =
TEST MODE – Forces the interval to value 36…48 s.
8128 AUX START ORDER
Sets the start order of the auxiliary motors.
1 =
EVEN RUNTIME – Time sharing is active. The start order depends on the run times.
2 =
RELAY ORDER – The start order is fixed to be the order of the relays.
2112 ZERO SPEED DELAY
Defines the delay for the Zero Speed Delay function. If parameter value is set to zero, Zero Speed Delay function is
disabled.
The function is useful in applications where a smooth and quick restarting is essential. During the delay the drive
knows accurately the rotor position.
Zero speed delay can be used e.g. with jogging function or mechanical brake.
No Zero Speed Delay
The drive receives a stop command and decelerates along a ramp. When the motor actual speed falls below an
internal limit (called Zero Speed), the speed controller is switched off. The drive modulation is stopped and the motor
coasts to standstill.
With Zero Speed Delay
The drive receives a stop command and decelerates along a ramp. When the actual motor speed falls below an
internal limit (called Zero Speed), the zero speed delay function activates. During the delay the functions keeps the
speed controller live: The drive modulates, motor is magnetized and drive is ready for a quick restart.
2113 START DELAY
Defines the Start delay. After the conditions for start have been fulfilled, the drive waits until the delay has elapsed
and then starts the motor. Start delay can be used with all start modes.
•If
START DELAY = zero, the delay is disabled.
Speed
t
Zero Speed
Speed
t
Zero Speed
Delay
No Zero Speed Delay With Zero Speed Delay
Speed controller
switched off: Motor
coasts to stop.
Speed controller remains live.
Motor is decelerated to true 0
speed.
Update Notice
4
Override
Motor control
Miscellaneous
1706 OVERRIDE DIR
Selects the source of the override direction signal.
0 =
FORWARD – Assigns forward as the override direction.
1 =
DI1 – Defines digital input DI1 as the override direction signal.
• Activating the digital input selects the forward direction.
• De-activating the digital input selects the reverse direction.
2…6 =
DI2…DI6 – Defines digital input DI2…DI6 as the override direction signal.
•See
DI1 above.
7 =
REVERSE – Assigns reverse as the override direction.
-1 =
DI1(INV) – Defines an inverted digital input DI1 as the override direction signal.
• De-activating the digital input selects the forward direction.
• Activating the digital input selects the reverse direction.
-2…-6 =
DI2(INV)…DI6(INV) – Defines an inverted digital input DI2…DI6 as the override direction signal.
•See
DI1(INV) above.
1707 OVERRIDE REF
Selects the source of the override reference.
1 =
CONSTANT – Selects a preset frequency or speed for the override. The frequency value is defined by parameter
1702
OVERRIDE FREQ and the speed value by parameter 1703 OVERRIDE SPEED.
2 =
PID – The reference is taken from the PID output, see group 40 PROCESS PID SET 1.
• Note: The following conditions must be met when using PID in the override mode:
• PID1 set point (parameter 4010
SET POINT SEL) can be either A1, A2 or INTERNAL.
• PID1 parameter set 1 must be active (parameter 4027
PID 1 PARAM SET = SET 1).
• Override direction (parameter 1706
OVERRIDE DIR) can be either 0 = FORWARD or 7 = REVERSE.
2609 NOISE SMOOTHING
This parameter introduces a random component to the switching frequency. Noise smoothing distributes the acoustic
motor noise over a range of frequencies instead of a single tonal frequency resulting in lower peak noise intensity.
The random component has an average of 0 Hz. It is added to the switching frequency set by parameter
2606
SWITCHING FREQ. This parameter has no effect if parameter 2606 = 12 kHz.
0 =
DISABLE
1 = ENABLE.
2619 DC STABILIZER
Enables or disables the DC voltage stabilizer. The DC stabilizer is used in scalar control mode to prevent possible
voltage oscillations in the drive DC bus caused by motor load or weak supply network. In case of voltage variation the
drive tunes the frequency reference to stabilize the DC bus voltage and therefore the load torque oscillation.
0 =
DISABLE – Disables DC stabilizer.
1 =
ENABLE – Enables DC stabilizer.
0158 PID COMM VALUE 1
Data received from fieldbus for PID control (PID1 and PID2).
0159 PID COMM VALUE 2
Data received from fieldbus for PID control (PID1 and PID2).
Update Notice
5
1004 JOGGING SEL
Defines the signal that activates the jogging function. Jogging uses Constant Speed 7 for speed reference and ramp
pair 2 for accelerating and decelerating. When the jogging activation signal is lost, the drive uses ramp stop to
decelerate to zero speed, even if coast stop is used in normal operation (parameter 2102). The jogging status can be
parameterized to relay outputs (parameter 1401). The jogging status is also seen in DCU Profile status bit 21.
0 =
NOT SEL – Disables the jogging function.
1 =
DI1 – Activates/de-activates jogging based on the state of DI1 (DI1 activated = jogging active; DI1 de-activated =
jogging inactive).
2…6 =
DI2…DI6 – Activates jogging based on the state of the selected digital input. See DI1 above.
-1 =
DI1(INV) – Activates jogging based on the state of DI1 (DI1 activated = jogging inactive; DI1 de-activated = jogging
active).
-2…-6 =
DI2(INV)…DI6(INV) – Activates jogging based on the state of the selected digital input. See DI1(INV) above.
1103 REF1 SELECT
20 =
KEYPAD(RNC) – Defines the control panel as the reference source. A Stop command resets the reference to zero
(R stands for reset.). Changing the control source (
EXT1 to EXT2, EXT2 to EXT1) does not copy the reference.
21 =
KEYPAD(NC) – Defines the control panel as the reference source. A Stop command does not reset the reference
to zero. The reference is stored. Changing the control source (
EXT1 to EXT2, EXT2 to EXT1) does not copy the
reference.
1401 RELAY OUTPUT 1
46 =
START DELAY – Energize relay when a start delay is active.
52 =
JOG ACTIVE – Energize relay when the jogging function is active.
1610 DISPLAY ALARMS
Controls the visibility of the following alarms:
• 2001, Overcurrent alarm
• 2002, Overvoltage alarm
• 2003, Undervoltage alarm
• 2009, Device overtemperature alarm.
For more information, see section Alarm listing.
0 =
NO – The above alarms are suppressed.
1 =
YES – All of the above alarms are enabled.
2101 START FUNCTION
8 =
RAMP – Immediate start from zero frequency.
3023 WIRING FAULT
Defines the drive response to cross wiring faults and to ground faults detected when the drive is NOT running. When
the drive is not running, it monitors for:
• Improper connections of input power to the drive output (the drive can display fault 35,
OUTPUT WIRING if improper
connections are detected).
• Ground faults (the drive can display fault 16, earth fault if a ground fault is detected). Also, see parameter 3017
EARTH FAULT.
0 =
DISABLE – No response to either of the above monitoring results.
1 =
ENABLE – Displays a fault when this monitoring detects problems.
4010 SET POINT SEL
20 =
PID2OUT – Defines PID controller 2 output (parameter 0127 PID 2 OUTPUT) as the reference source.
Update Notice
6
DELETED PARAMETERS
New group 37 USER LOAD CURVE replaces the deleted underload parameters.
4014 FBK SEL
11 =
COMM FBK 1 – Signal 0158 PID COMM VALUE 1 provides the feedback signal.
12 =
COMM FBK 2 – Signal 0159 PID COMM VALUE 2 provides the feedback signal.
13 =
AVE(ACT1,2) – The average of ACT1 and ACT2 provides the feedback signal.
4016 ACT1 INPUT
6 =
COMM ACT 1 – Uses value of signal 0158 PID COMM VALUE 1 for ACT1.
7 =
COMM ACT 2 – Uses value of signal 0159 PID COMM VALUE 2 for ACT1.
4017 ACT2 INPUT
6 =
COMM ACT 1 – Uses value of signal 0158 PID COMM VALUE 1 for ACT2.
7 =
COMM ACT 2 – Uses value of signal 0159 PID COMM VALUE 2 for ACT2.
4027 PID 1 PARAM SET
12 = 2-
ZONE MIN – The drive calculates the difference between setpoint 1 and feedback 1 as well as setpoint 2 and
feedback 2. The drive will control the zone (and select the set) which has a larger difference.
• A positive difference (a setpoint higher than the feedback) is always larger than a negative difference. This keeps
feedback values at or above the setpoint.
• Controller does not react to the situation of feedback above setpoint if another zone's feedback is closer to its
setpoint.
13 = 2-
ZONE MAX – The drive calculates the difference between setpoint 1 and feedback 1 as well as setpoint 2 and
feedback 2. The drive will control the zone (and select the set) which has a smaller difference.
• A negative difference (a setpoint lower than the feedback) is always smaller than a positive difference. This keeps
feedback values at or below the setpoint.
• Controller does not react to the situation of feedback below setpoint if another zone's feedback is closer to its
setpoint.
14 = 2-
ZONE AVE – The drive calculates the difference between setpoint 1 and feedback 1 as well as setpoint 2 and
feedback 2. In addition, it calculates the average of the deviations, and uses it to control zone 1. Therefore one
feedback is kept above its setpoint and another is kept as much below its setpoint.
5127 FBA PAR REFRESH
Validates any changed fieldbus parameter settings.
0 =
DONE – Refreshing done.
1 =
REFRESH – Refreshing.
• After refreshing, the value reverts automatically to
DONE.
3013 UNDERLOAD FUNCTION
3014 UNDERLOAD TIME
3015 UNDERLOAD CURVE
Update Notice
7
NEW 380...480 V TYPES
Ratings
Fuses
Cooling
1
Not available in ACH550-UH series
2
Not available in ACH550-01 series
Type code Normal use
Frame
size
ACH550-xx-
see below
I
2N
A
P
N
kW
P
N
hp
Three-phase supply voltage, 380…480 V
-045A-4 45 22.0 30 R3
-087A-4
1
87 45.0 60 R4
-097A-4
2
97 45.0 75 R4
-125A-4 125 55.0 100 R5
ACH550-xx-
Input
current
A
Input power (mains) fuses
IEC 60269 gC
A
UL class T
A
Three-phase supply voltage, 380…480 V
-045A-4 45 50 60
-087A-4
1
87 125 125
-097A-4
2
97 125 125
-125A-4 125 160 175
ACH550-xx-
Heat dissipation Air flow
WBTU/Hrm
3
/h ft
3
/min
Three-phase supply voltage, 380…480 V
-045A-4 667 2278 134 79
-087A-4
1
1440 4918 280 147
-097A-4
2
1440 4918 280 147
-125A-4 1940 6625 350 205
Update Notice
8
1. Contents of this manual
2. Preparing for installation
3. Installing the drive
4. Start-up and control panel
5. Application macros and wiring
6. Real-time clock and timed functions
7. Serial communications
8. Parameter listing and descriptions
9. Diagnostics and maintenance
10. Technical data
3AFE68258537 REV C
EN
EFFECTIVE: 24.05.2006
ACH550 User's Manual
1
Table of contents
1. Contents of this manual ............................................. 7
What this chapter contains .......................................... 7
Compatibility ................................................................ 7
Intended use ................................................................ 7
Intended audience ....................................................... 7
Use of warnings and notes .......................................... 8
Safety instructions ....................................................... 8
Drive package............................................................ 11
Lifting the drive .......................................................... 12
2. Preparing for installation.......................................... 13
What this chapter contains ........................................ 13
Drive identification ..................................................... 14
Frame size ................................................................. 17
Motor identification..................................................... 19
Motor compatibility..................................................... 21
Suitable environment and enclosure ......................... 22
Suitable mounting location......................................... 23
Wiring and EMC considerations ................................ 26
Cabling instructions ................................................... 29
Motor cables .............................................................. 29
Control cables............................................................ 33
Tools required............................................................ 36
Checklist for installation preparations ........................ 37
3. Installing the drive..................................................... 39
What this chapter contains ........................................ 39
Preparing the mounting location ................................ 39
Removing front cover (IP54)...................................... 40
Removing front cover (IP21)...................................... 41
Mounting the drive (IP54) .......................................... 42
2
ACH550 User's Manual
Mounting the drive (IP21)........................................... 43
Overview of wiring installation (R1…R4) ................... 44
Overview of wiring installation (R5…R6) ................... 45
Power wiring (IP54).................................................... 46
Control wiring (IP54) .................................................. 49
Power wiring (IP21).................................................... 50
Control wiring (IP21) .................................................. 53
Check installation....................................................... 55
Re-install cover (IP54) ............................................... 57
Re-install cover (IP21) ............................................... 58
Apply power ............................................................... 59
4. Start-up and control panel........................................ 61
What this chapter contains......................................... 61
Control panel compatibility......................................... 61
HVAC control panel (ACH-CP-B) features................. 61
Start-up ...................................................................... 62
Modes ........................................................................ 65
Standard display mode .............................................. 66
Parameters mode ...................................................... 68
Start-up assistant mode............................................. 70
Changed parameters mode ....................................... 73
Drive parameter backup mode................................... 74
Clock set mode .......................................................... 80
I/O settings mode....................................................... 83
Fault logger mode...................................................... 84
5. Application macros and wiring ................................ 85
What this chapter contains......................................... 85
Applications................................................................ 85
Selecting an application macro.................................. 86
Restoring defaults...................................................... 87
1. HVAC default ......................................................... 88
2. Supply fan .............................................................. 90
3. Return fan .............................................................. 92
4. Cooling tower fan ................................................... 94
5. Condenser ............................................................. 96
ACH550 User's Manual
3
6. Booster pump ........................................................ 98
7. Pump alternation.................................................. 100
8. Internal timer........................................................ 102
9. Internal timer with constant speeds / Powered
roof ventilator ........................................................... 104
10. Floating point ..................................................... 106
11. Dual setpoint PID............................................... 108
12. Dual setpoint PID with constant speeds ............ 110
13. E-bypass (USA only) ......................................... 112
14. Hand control ...................................................... 114
Connection example of a two-wire sensor............... 116
6. Real-time clock and timed functions..................... 117
What this chapter contains ...................................... 117
Real-time clock and timed functions ........................ 117
Using the timer......................................................... 118
1. Enabling the timer................................................ 120
2. Setting the time period......................................... 121
3. Creating a timer ................................................... 122
4. Connecting parameters ....................................... 124
Example of timer use ............................................... 125
7. Serial communications ........................................... 129
What this chapter contains ...................................... 129
System overview...................................................... 130
Mechanical and electrical installation of the plug-in
fieldbus .................................................................... 132
Setting up communication through a plug-in
fieldbus adapter (EXT FBA) module ........................ 134
Drive control parameters ......................................... 136
Fieldbus control interface......................................... 146
Generic Drive Profile................................................ 160
4
ACH550 User's Manual
8. Parameter listing and descriptions........................ 165
What this chapter contains....................................... 165
Parameter groups .................................................... 165
Overview of PID controllers ..................................... 264
Complete parameter list........................................... 314
9. Diagnostics and maintenance................................ 347
What this chapter contains....................................... 347
Diagnostics displays ................................................ 348
Correcting faults....................................................... 349
Fault resetting .......................................................... 358
History...................................................................... 359
Correcting alarms..................................................... 359
Maintenance intervals .............................................. 364
Heatsink ................................................................... 365
Main fan replacement .............................................. 365
Internal enclosure fan replacement.......................... 368
Capacitors................................................................ 369
Control panel............................................................ 370
10. Technical data........................................................ 371
What this chapter contains....................................... 371
Ratings..................................................................... 371
Input power (mains) cable and fuses....................... 378
Cable terminals........................................................ 383
Input power (mains) connection............................... 383
Motor connection ..................................................... 384
Control connections ................................................. 387
Efficiency.................................................................. 391
Cooling..................................................................... 391
Dimensions and weights.......................................... 393
Ambient conditions................................................... 409
Materials .................................................................. 410
Applicable standards................................................ 411
CE marking .............................................................. 411
C-Tick marking......................................................... 412
ACH550 User's Manual
5
UL marking .............................................................. 412
IEC/EN 61800-3 (2004) Definitions ......................... 413
Compliance with the IEC/EN 61800-3 (2004).......... 413
Equipment warranty and liability .............................. 415
Product protection in the USA ................................. 416
Contact information.................................................. 417
Index ........................................................................ 421
6
ACH550 User's Manual
Contents of this manual 7
ACH550 User's Manual
Contents of this manual
What this chapter contains
This chapter contains the safety instructions which you must
follow when installing, operating and servicing the drive. If
ignored, physical injury or death may follow, or damage may
occur to the drive, the motor or driven equipment. Read the
safety instructions before you work on the unit. This chapter also
contains an introduction to the contents of this manual.
Compatibility
The manual is compatible with the ACH550 drive firmware
version 3.00c or later. See parameter 3301
FW VERSION on page
248.
Intended use
The ACH550 and the instructions in this manual are intended for
use in HVAC applications. The macros should only be applied to
the applications defined in the respective section.
Intended audience
This manual is intended for personnel who install, commission,
operate and service the drive. Read the manual before working
on the drive. The reader is expected to know the fundamentals
of electricity, wiring, electrical components and electrical
schematic symbols.
8 Contents of this manual
ACH550 User's Manual
Use of warnings and notes
There are two types of safety instructions throughout this
manual:
• Warnings caution you about conditions which can result in
serious injury and death and/or damage to the equipment.
They also tell you how to avoid the danger.
• Notes draw attention to a particular condition or fact, or give
information on a subject.
The warning symbols are used as follows:
Danger; electricity warns of high voltage which can
cause physical injury and/or damage to the equipment.
General danger warns about conditions, other than those
caused by electricity, which can result in physical injury
and/or damage to the equipment.
Safety instructions
WARNING! The ACH550 should ONLY be installed by a
qualified technician.
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+/BRK+ and
UDC-/BRK-.
WARNING! Dangerous voltage is present when input power is
connected. After disconnecting the supply, wait at least 5
minutes before removing the cover. To check, measure for zero
voltage at the DC terminals, which are, depending on the frame
size, UDC+/BRK+ and UDC-/BRK-.
WARNING! Even when the power is switched off from the input
terminals of the ACH550, there may be dangerous voltage (from
external sources) on the terminals of the relay outputs
R01…R03 and, if the relay extension board is included in the
installation, R04…R06.
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ABB ACH550-UH HVAC User manual

Type
User manual
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