Danfoss VLT CDS 303 User manual

MAKING MODERN LIVING POSSIBLE
Operating Instructions
VLT®Compressor Drives CDS 302/CDS 303
www.DanfossDrives.com

Contents
1 Introduction 4
1.1 Introduction 4
1.1.1 Sequence of Operation 5
2 Safety Instructions and General Warnings 6
2.1 Safety and Warnings 6
2.1.1 High Voltage Warning 6
2.1.2 Caution 6
2.1.3 Disposal 6
2.1.4 Software Version 6
2.1.5 Safety Instructions 6
2.1.6 General Warning 7
2.1.7 Leakage Current 7
2.1.8 Residual Current Device 7
2.1.9 IT Mains 7
2.1.10 Avoid Unintended Start 7
2.2 Safe Torque O 7
2.2.1 Terminal 37 Safe Torque O Function 8
2.2.2 Safe Torque O Commissioning Test 13
3 How to Install 14
3.1 Environment 14
3.1.1 Ambient Temperature and Altitude 14
3.1.2 Environmental Requirements for Mechanical Installation 14
3.2 Mechanical Installation 14
3.2.1 Accessory Bags 14
3.2.2 Mechanical Mounting 15
3.2.3 Mechanical Dimensions 16
3.3 Electrical Installation 17
3.3.1 Cables General 17
3.3.2 Removal of Knockouts for Extra Cables 17
3.3.3 Mains Connection for B1, B2 and B3 18
3.3.4 Mains connection for B4, C1 and C3 18
3.3.5 Motor Compressor Connection 20
3.3.6 Motor Compressors Cables 20
3.3.7 Electrical Installation of Motor Compressor Cables 21
3.3.8 Compressor Motor Protection 21
3.3.9 Access to Control Terminals 21
Contents Operating Instructions
MG34M422 Danfoss A/S © Rev. 2013-07-03 All rights reserved.

3.3.10 Basic Wiring Example 22
3.3.11 Electrical Installation, Control Cables 24
3.3.12 Electrical Installation - EMC Protection 26
3.3.13 Safety Ground Connection 28
3.3.14 Basic Examples of Control Connections 28
3.3.15 High-voltage Test 29
3.4 Fuses and Circuit Breakers 29
3.4.1 Fuses 29
3.4.2 Recommendations 29
3.4.3 CE Compliance 30
3.4.4 Fuse Specications 30
3.5 Application Example 34
3.5.1 BASIC Cascade/Pack Controller 34
3.5.2 System Status and Operation 35
3.5.3 Pack Compressor Wiring Diagram 35
4 Quick Set-up 37
4.1 Quick Set-up 37
4.1.1 Basic Programming Procedures 37
4.1.2 Open Loop with External Reference 37
4.1.3 PID Closed Loop with 4-20 mA Pressure Transmitter 37
4.1.4 Other Compressor Features 39
5 How to Program 40
5.1 How to Program on the Graphical LCP 40
5.1.1 Control Panel 40
5.1.2 Display Lines 40
5.1.3 Display Contrast Adjustment 40
5.1.4 Indicator Lights 41
5.2 LCP Keys 41
5.2.1 Function Keys 41
5.2.2 Navigation Keys 41
5.2.3 Local Control Keys 41
5.2.4 Quick Transfer of Parameter Settings 42
5.2.5 Data Storage in LCP 42
5.2.6 Initialization to Default Settings 42
5.2.7 Data Transfer from LCP to Frequency Converter 43
5.2.8 Parameter Selection 44
5.2.9 Changing Data 45
Contents VLT®Compressor Drives CDS 302/CDS 303
Danfoss A/S © Rev. 2013-07-03 All rights reserved. MG34M422

5.2.10 Changing a Text Value 45
5.2.11 Changing a Group of Numeric Data Values 45
6 Parameter Descriptions 46
6.1 LCP Display 46
6.1.1 LCP Programming 46
6.2 Par. Group 0 - Operation and Display 47
6.3 Par. Group 1 - Load and Motor 53
6.4 Par. Group 3 - Reference/Ramps 54
6.5 Parameters: 4-** Limits/Warnings 59
6.6 Par. Group 5 - Digital In/Out 62
6.7 Par. Group 6 - Analog In/Out 72
6.8 Par. Group 7 - Controllers 76
6.9 Parameters: 8-** Communications and Options 81
6.10 Par. Group 13 - Smart Logic Control 85
6.11 Par. Group 14 - Special Functions 102
6.12 Par. Group 15 - Drive Information 105
6.13 Parameters: 16-** Data Readouts 106
6.14 Par. Group 25 - Cascade Controller 112
6.15 Par. Group 28 - Compressor Functions 122
6.16 Parameter Lists 127
6.16.1 Conversion 127
7 Troubleshooting 147
7.1 Status Messages 147
7.1.1 Warnings/Alarm Messages 147
8 General Specications 161
8.1.1 Mains Supply 3x200-240 V AC 161
8.1.2 Mains Supply 3x380-480 V AC 162
8.1.3 Mains Supply 3x525-600 V AC 163
Index 168
Contents Operating Instructions
MG34M422 Danfoss A/S © Rev. 2013-07-03 All rights reserved.

1 Introduction
1.1 Introduction
130BC396.13
Unit controller
Start/stop
High pressure cutout
Reference
Pressure sensor 4-20 mA
Oil solenoid
Drive
Low Pressure Cutout
VFD
Figure 1.1 Compressor Drive System
The VLT®Compressor Drives utilize and combine Danfoss
design and manufacturing expertise. Our extensive
application knowledge of refrigeration, air conditioning,
and motion controls ensures an optimized product design
and package solution:
•A “plug & play” solution
•Operational eciency
•Flexibility & best control accuracy
•Innovative and reliable solution
The frequency converter is 100% preset for speed open
loop conguration with 0-10 V reference corresponding to
1800-5400 RPM for CDS 302 and 1500-6000 RPM for CDS
303.
Introduction VLT®Compressor Drives CDS 302/CDS 303
4 Danfoss A/S © Rev. 2013-07-03 All rights reserved. MG34M422
11

The dedicated frequency converter functionality includes:
•Start Up
Once the frequency converter has a start
command, the compressor runs up to 3000 RPM
and remains at that speed for 10 s. Once this
initial time is complete, the frequency converter
slowly ramps to the reference speed.
•Shut Down
The stop command bypasses the normal ramp
time and the frequency converter ramps the
compressor to stop fast.
•Short Cycle Prevention
The frequency converter has a minimum running
time of 12 s, with an interval between starts of 5
minutes (300 s). The short cycle delay values are
adjustable in parameter group 28-0* Short Cycle
Protection.
•Oil Injection
The frequency converter cycles a solenoid valve
via its relay 1. This cycling ensures that the oil is
distributed to the scroll set, improves tightness,
and reduces internal gas leakage during the
compression process.
•Oil Management
If compressor speed is below 3000 RPM for a
determined amount of time (within 60 minutes),
the boost cycle runs the compressor back to 4200
RPM for a determined amount of time (within 90
s). The maximum time between xed boosts is
limited to a determined amount of time (within
24 hours).
•Discharge Temperature Limit
If the discharge temperature exceeds the warning
level of 266 °F, the compressor drops in speed by
10 Hz for the next 3 minutes. The compressor
continues to drop 10 Hz for each 3 minutes for as
long as the temperature is over the warning level.
If the discharge temperature exceeds the
emergency level of 293 °C, the compressor is
stops.
•Crankcase Heater
On VSH088 and VSH117, when the compressor is
stopped, the frequency converter provides a DC
current to the compressor motor. The DC current
keeps the oil warm and an external crankcase
heater is not needed.
VSH170 needs an external crankcase heater
(surface sump heater or belt type).
•Low Pressure Switch
An LP switch is mandatory with the frequency
converter compressor in any type of application.
•High Pressure Switch
The high-pressure switch must be connected to
input terminal 37 of the frequency converter in
series with the other safety devices.
1.1.1 Sequence of Operation
All compressor types have strong demands of speed limits
to ensure the oil lubrication of the bearings. Therefore, fast
acceleration from standstill to minimum speed with a
special start ramp is important, when a start command is
given. This is also the reason why the Compressor Drive
trips with an alarm [A49] Speed Limit, if the speed falls
below minimum speed e.g. when the current limit
controller reduces the speed due to a high load. This alarm
is reset automatically after 30 s and the compressor
restarts.
If a rotor is blocked, the Compressor Drive trips with an
alarm [A18] Start failed, if the speed fails to get above the
minimum speed limit for the compressor within 2 s. This
alarm is reset automatically after 30 s and the compressor
restarts.
The manufacturer sets up the necessary start settings,
motor data and all the other preferred settings for each
compressor type/size. Automatically set up the values by
selecting the actual compressor in 1-13 Compressor
Selection.
Introduction Operating Instructions
MG34M422 Danfoss A/S © Rev. 2013-07-03 All rights reserved. 5
11

2 Safety Instructions and General Warnings
2.1 Safety and Warnings
2.1.1 High Voltage Warning
WARNING
The voltage of the frequency converter is dangerous
whenever the converter is connected to mains. Incorrect
tting of the motor or frequency converter may damage
the equipment, or cause serious injury, or death. It is
essential to comply with the instructions in this manual
as well as local and national rules and safety regulations.
WARNING
Installation in high altitudes:
By altitudes above 2 km (6561 ft), contact Danfoss
regarding PELV.
2.1.2 Caution
CAUTION
The VLT®Compressor Drives DC link capacitors remain
charged after power has been disconnected. To avoid an
electrical shock hazard, disconnect the frequency
converter from the mains before carrying out
maintenance. Wait at least as follows before doing
service on the frequency converter:
CDS 302 and CDS 303: 11-22 kW 15 minutes
High voltage can be present on the DC link even when
the LEDs are turned o.
2.1.3 Disposal
Figure 2.1
Drive
Do not dispose of equipment containing electrical
components together with domestic waste. It must be
collected separately with Electrical and Electronic Waste
according to local and national legislation.
Compressors
Do not to throw away a used compressor, but dispose of it
and its oil at a specialized recycling company site.
NOTICE!
Imposed limitations on the output frequency
(due to export control regulations):
From software versions 2.4x (CDS 302) and 1.0x (CDS
303), the output frequency of the frequency converter is
limited to 590 Hz.
2.1.4 Software Version
CDS 302 Operating Instructions Software version: 2.4x
These Operating Instructions can be used for all CDS 302
Compressor Drives®with software version 2.4x. The software
version number can be read in parameter 15-43 Software Version.
CDS 303 Operating Instructions Software version: 1.0x
These Operating Instructions can be used for all CDS 303
Compressor Drives®with software version 1.0x. The software
version number can be read in parameter 15-43 Software Version.
2.1.5 Safety Instructions
•Make sure that the frequency converter is
properly connected to ground
•Do not remove mains plugs or motor plugs while
the frequency converter is connected to mains
•Protect personnel against supply voltage
•Protect the motor against overloading according
to local and national regulations
•Motor overload protection is included in the
default settings
Safety Instructions and Gen... VLT®Compressor Drives CDS 302/CDS 303
6 Danfoss A/S © Rev. 2013-07-03 All rights reserved. MG34M422
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•The ground leakage current exceeds 3.5 mA
•The [O] key is not a safety switch. It does not
disconnect the frequency converter from mains
2.1.6 General Warning
WARNING
Touching the electrical parts may be fatal - even after
the equipment has been disconnected from mains. Also
make sure that other voltage inputs have been discon-
nected, such as load-sharing (linkage of DC intermediate
circuit).
Using VLT®Compressor Drives: Wait at least 15 minutes.
Shorter time is allowed only if indicated on the
nameplate for the specic unit.
2.1.7 Leakage Current
CAUTION
The ground leakage current from the frequency
converter exceeds 3.5 mA. Ensure good mechanical
ground connection (terminal 95) to the ground cable.
Use at least 10 mm2cable cross section or 2 times rated
ground wires terminated separately.
2.1.8 Residual Current Device
CAUTION
This product can cause a DC current in the protective
conductor. Where a ground fault interrupter (GFI) is used
for extra protection, only use an GFI of Type B (time
delayed) on the supply side of this product. See also RCD
Application Note, MN90G. Protective grounding of the
frequency converter and the use of RCDs must always
follow local and national regulations.
2.1.9 IT Mains
CAUTION
Do not connect 400 V frequency converters with RFI-
lters to mains supplies with a voltage between phase
and ground of more than 440 V. For IT mains and delta
ground (grounded leg), mains voltage may exceed 440 V
between phase and ground. To disconnect the internal
RFI capacitors from the RFI lter to ground, use 14-50 RFI
1on the frequency converter. This procedure reduces the
RFI performance to A2 level.
2.1.10 Avoid Unintended Start
While the frequency converter is connected to mains, the
motor can be started/stopped using:
•digital commands
•bus commands
•references
•via the Local Control Panel (LCP)
Disconnect the frequency converter from mains whenever
personal safety considerations make it necessary to avoid
unintended start. To avoid unintended start, always press
[OFF] before changing parameters. An electronic fault,
temporary overload, a fault in the mains supply, or lost
motor connection may cause a stopped motor to start. A
frequency converter with Safe Torque O provides a
certain degree of protection against such unintended start,
if the Safe Torque O Terminal 37 is on low voltage level
or disconnected.
2.2 Safe Torque O
The frequency converter can perform the safety function
Safe Torque O (STO, as dened by EN IEC 61800-5-21) and
Stop Category 0 (as dened in EN 60204-12).
Before integration and use of Safe Torque O in an instal-
lation, perform a thorough risk analysis to determine
whether the Safe Torque O functionality and safety levels
are appropriate and sucient. Safe Torque O is designed
and approved suitable for the requirements of:
•Safety Category 3 in EN 954-1 (and EN ISO
13849-1)
•Performance Level "d" in EN ISO 13849-1:2008
•SIL 2 Capability in IEC 61508 and EN 61800-5-2
•SILCL 2 in EN 62061
1) Refer to EN IEC 61800-5-2 for details of Safe torque o
(STO) function.
2) Refer to EN IEC 60204-1 for details of stop category 0
and 1.
Activation and Termination of Safe Torque O
The Safe Torque O (STO) function is activated by
removing the voltage at terminal 37 of the safe inverter. By
connecting the safe inverter to external safety devices
providing a safe delay, an installation for a Safe Torque O
Category 1 can be obtained. The Safe Torque O function
can be used for asynchronous, synchronous, and
permanent magnet motors.
Safety Instructions and Gen... Operating Instructions
MG34M422 Danfoss A/S © Rev. 2013-07-03 All rights reserved. 7
22

WARNING
After installation of Safe Torque O (STO), a commis-
sioning test as specied in section Safe Torque O
Commissioning Test in the Design Guide must be
performed. A passed commissioning test is mandatory
after rst installation and after each change to the safety
installation.
Safe Torque O Technical Data
The following values are associated to the dierent types
of safety levels:
Reaction time for T37
•Maximum reaction time: 10 ms
Reaction time = delay between de-energizing the STO
input and switching o the frequency converter output
bridge.
Data for EN ISO 13849-1
•Performance Level "d"
•MTTFd(Mean Time To Dangerous Failure): 24816
years
•DC (Diagnostic Coverage): 99%
•Category 3
•Lifetime 20 years
Data for EN IEC 62061, EN IEC 61508, EN IEC 61800-5-2
•SIL 2 Capability, SILCL 2
•PFH (Probability of Dangerous failure per
Hour)=7e-10FIT=7e-19/h
•SFF (Safe Failure Fraction) >99%
•HFT (Hardware Fault Tolerance)=0 (1001
architecture)
•Lifetime 20 years
Data for EN IEC 61508 low demand
•PFDavg for one-year proof test: 3, 07E-14
•PFDavg for three year proof tests: 9, 20E-14
•PFDavg for ve year proof tests: 1, 53E-13
No maintenance of the STO functionality is needed.
Take the necessary security measures, e.g. installation in a
closed cabinet that is only accessible for skilled personnel.
SISTEMA Data
Functional safety data is available via a data library for use
with the SISTEMA calculation tool from the IFA (Institute
for Occupational Safety and Health of the German Social
Accident Insurance), and data for manual calculation. The
library is permanently completed and extended.
Abbrev. Ref. Description
Cat. EN 954-1 Category, level “B, 1-4”
FIT Failure In Time: 1E-9 hours
HFT IEC 61508 Hardware Fault Tolerance: HFT = n
means, that n+1 faults could cause a
loss of the safety function
MTTFd EN ISO
13849-1
Mean Time To Failure - dangerous. Unit:
years
PFH IEC 61508 Probability of Dangerous Failures per
Hour. Consider the PFH value when the
safety device is operated in high
demand (more often than once per
year); or operated in continuous mode,
where the frequency of demands for
operation made on a safety-related
system is greater than one per year.
PL EN ISO
13849-1
Discrete level used to specify the ability
of safety-related parts of control systems
to perform a safety function under
foreseeable conditions. Levels a-e.
SFF IEC 61508 Safe Failure Fraction [%]; Percentage part
of safe failures and dangerous detected
failures of a safety function or a
subsystem related to all failures.
SIL IEC 61508 Safety Integrity Level
STO EN
61800-5-2
Safe Torque O
SS1 EN 61800
-5-2
Safe Torque O 1
Table 2.1 Abbreviations Related to Functional Safety
The PFDavg value (Probability of Failure on Demand)
Failure probability in the event of a request of the safety
function.
2.2.1 Terminal 37 Safe Torque O Function
The frequency converter is available with Safe Torque O
functionality via control terminal 37. Safe Torque O
disables the control voltage of the power semiconductors
of the frequency converter output stage. This in turn
prevents generating the voltage required to rotate the
motor. When the Safe Torque O (T37) is activated, the
frequency converter issues an alarm, trips the unit, and
coasts the motor to a stop. Manual restart is required. The
Safe Torque O function can be used as an emergency
stop for the frequency converter. In normal operating
mode when Safe Torque O is not required, use the
regular stop function instead. When automatic restart is
used, ensure the requirements of ISO 12100-2 paragraph
5.3.2.5 are fullled.
Safety Instructions and Gen... VLT®Compressor Drives CDS 302/CDS 303
8 Danfoss A/S © Rev. 2013-07-03 All rights reserved. MG34M422
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Liability Conditions
Ensure that qualied personnel installs and operates the
Safe Torque O function:
•Read and understand the safety regulations
concerning health and safety/accident prevention
•Understand the generic and safety guidelines
given in this description and the extended
description in the relevant Design Guide
•Have a good knowledge of the generic and safety
standards applicable to the specic application
User is dened as:
•integrator
•operator
•service technician
•maintenance technician
Standards
Use of Safe Torque O on terminal 37 requires fullling of
all provisions for safety, including relevant laws, regulations
and guidelines. The optional Safe Torque O function
complies with the following standards.
•IEC 60204-1: 2005 category 0 – uncontrolled stop
•IEC 61508: 1998 SIL2
•IEC 61800-5-2: 2007 – safe torque o (STO)
function
•IEC 62061: 2005 SIL CL2
•ISO 13849-1: 2006 Category 3 PL d
•ISO 14118: 2000 (EN 1037) – prevention of
unexpected startup
The information and instructions of the instruction manual
are not sucient for a proper and safe use of the Safe
Torque O functionality. The related information and
instructions of the relevant Design Guide must be followed.
Protective Measures
•Qualied and skilled personnel are required for
installation and commissioning of safety
engineering systems
•The unit must be installed in an IP54 cabinet or
in an equivalent environment. In special
applications, a higher IP degree is required
•The cable between terminal 37 and the external
safety device must be short circuit protected
according to ISO 13849-2 table D.4
•When external forces inuence the motor axis (for
example, suspended loads), more measures are
required (for example, a safety holding brake) to
eliminate potential hazards
Safe Torque O Installation and Set-Up
WARNING
SAFE TORQUE OFF FUNCTION!
The Safe Torque O function does NOT isolate mains
voltage to the frequency converter or auxiliary circuits.
Perform work on electrical parts of the frequency
converter or the motor only after isolating the mains
voltage supply and waiting the length of time specied
in chapter 2.1 Safety and Warnings. Failure to isolate the
mains voltage supply from the unit and waiting the time
specied could result in death or serious injury.
•It is not recommended to stop the frequency
converter by using the Safe Torque O function.
If a running frequency converter is stopped by
using the function, the unit trips and stops by
coasting. If unacceptable or dangerous, use
another stop mode to stop the frequency
converter and machinery, before using this
function. Depending on the application, a
mechanical brake can be required.
•For synchronous and permanent magnet motor
frequency converters, in a multiple IGBT power
semiconductor failure: In spite of the activation of
the Safe Torque O function, the system can
produce an alignment torque which maximally
rotates the motor shaft by 180/p degrees. p
denotes the pole pair number.
•This function is suitable for performing
mechanical work on the system or aected area
of a machine only. It does not provide electrical
safety. Do not use this function as a control for
starting and/or stopping the frequency converter.
To perform a safe installation of the frequency converter,
follow these steps:
1. Remove the jumper wire between control
terminals 37 and 12 or 13. Cutting or breaking
the jumper is not sucient to avoid short-
circuiting. (See jumper on Figure 2.2.)
2. Connect an external Safety monitoring relay via a
NO safety function to terminal 37 (Safe Torque
O) and either terminal 12 or 13 (24 V DC).
Follow the instruction for the safety device. The
Safety monitoring relay must comply with
Category 3 /PL “d” (ISO 13849-1) or SIL 2 (EN
62061).
Safety Instructions and Gen... Operating Instructions
MG34M422 Danfoss A/S © Rev. 2013-07-03 All rights reserved. 9
22

12/13
37
130BA874.10
Figure 2.2 Jumper between Terminal 12/13 (24 V) and 37
130BC971.10
12
2
4
1
5
3
37
Figure 2.3 Installation to Achieve a Stopping Category 0 (EN
60204-1) with Cat. 3 /PL “d” (ISO 13849-1) or SIL 2 (EN 62061).
1 Frequency converter
2 [Reset] key
3 Safety relay (cat. 3, PL d or SIL2
4 Emergency stop button
5 Short-circuit protected cable (if not inside installation IP54
cabinet)
Table 2.2 Legend to Figure 2.3
Safe Torque O Commissioning Test
After installation and before rst operation, perform a
commissioning test of the installation using Safe Torque
O. Moreover, perform the test after each modication of
the installation.
Example with STO
A safety relay evaluates the E-Stop button signals and
triggers an STO function on the frequency converter in the
event of an activation of the E-Stop button (See Figure 2.4).
This safety function corresponds to a category 0 stop
(uncontrolled stop) in accordance with IEC 60204-1. If the
function is triggered during operation, the motor runs
down in an uncontrolled manner. The power to the motor
is safely removed, so that no further movement is possible.
It is not necessary to monitor plant at a standstill. If an
external force eect can occur, provide additional measures
to prevent any potential movement (for example
mechanical brakes).
NOTICE!
For all applications with Safe Torque O it is important
that short circuit in the wiring to T37 can be excluded.
Exclude the short circuit as described in EN ISO 13849-2
D4 by the use of protected wiring (shielded or
segregated).
Example with SS1
SS1 corresponds to a controlled stop, stop category 1
according to IEC 60204-1 (see Figure 2.5). When activating
the safety function, the frequency converter performs a
normal controlled stop. This can be activated through
terminal 27. After the safe delay time has expired on the
external safety module, the STO will be triggered and
terminal 37 will be set low. Ramping down as congured
in the frequency converter. If the frequency converter is
not stopped after the safe delay time, the activation of STO
will coast the frequency converter.
NOTICE!
When using the SS1 function, the brake ramp of the
frequency converter is not monitored with respect to
safety.
Example with Category 4/PL e application
Where the safety control system design requires two
channels for the STO function to achieve Category 4/PL e,
implement one channel via Safe Torque O T37 (STO) and
the other by a contactor. Connect the contactor in either
the frequency converter input or output power circuits and
controlled by the Safety relay (see Figure 2.6). The
contactor must be monitored through an auxiliary guided
contact, and connected to the reset input of the Safety
Relay.
Paralleling of Safe Torque O input the one Safety Relay
Safe Torque O inputs T37 (STO) may be connected
directly if it is required to control multiple frequency
converters from the same control line via one Safety Relay
Safety Instructions and Gen... VLT®Compressor Drives CDS 302/CDS 303
10 Danfoss A/S © Rev. 2013-07-03 All rights reserved. MG34M422
22

(see Figure 2.7). Connecting inputs increases the probability
of a fault in the unsafe direction. A fault in one frequency
converter can result in all frequency converters becoming
enabled. The probability of a fault for T37 is so low, that
the resulting probability still meets the requirements for
SIL2.
130BC972.10
12
37
1
3
4
2
Figure 2.4 STO Example
1 Frequency converter
2 [Reset] key
3 Safety relay
4 Emergency stop
Table 2.3 Legend to Figure 2.4
130BC973.10
18
37
4
1
2
12
3
Figure 2.5 SS1 Example
1 Frequency converter
2 [Reset] key
3 Safety relay
4 Emergency stop
Table 2.4 Legend to Figure 2.5
130BC974.10
12
37
K 1
K 1
K 1
4
1
3
2
Figure 2.6 STO Category 4 Example
1 Frequency converter
2 [Reset] key
3 Safety relay
4 Emergency stop
Table 2.5 Legend to Figure 2.6
Safety Instructions and Gen... Operating Instructions
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22

130BC975.10
12
37
1
20
1
1
3
4
5
2
37
20
37
20
Figure 2.7 Paralleling of Multiple Drives Example
1 Frequency converter
2 24 V DC
3 [Reset] key
4 Safety relay
5 Emergency stop
Table 2.6 Legend to Figure 2.7
WARNING
Safe Torque O activation (that is removal of 24 V DC
voltage supply to terminal 37) does not provide electrical
safety. The Safe Torque O function itself is therefore not
sucient to implement the Emergency-O function as
dened by EN 60204-1. Emergency-O requires measures
of electrical isolation, for example, by switching o
mains via an additional contactor.
1. Activate the Safe Torque O function by
removing the 24 V DC voltage supply to the
terminal 37.
2. After activation of Safe Torque O (that is, after
the response time), the frequency converter
coasts (stops creating a rotational eld in the
motor). The response time is typically less than 10
ms.
The frequency converter is guaranteed not to restart
creation of a rotational eld by an internal fault (in
accordance with Cat. 3 of EN 954-1, PL d acc. EN ISO
13849-1 and SIL 2 acc. EN 62061). After activation of Safe
Torque O, the display shows the text ”Safe Stop
activated”. The associated help text says, "Safe Stop has
been activated. This means that the Safe Torque O has
been activated, or that normal operation has not been
resumed yet after Safe Torque O activation”.
NOTICE!
The requirements of Cat. 3 (EN 954-1)/PL “d” (ISO
13849-1) are only fullled while 24 V DC supply to
terminal 37 is kept removed or low by a safety device
which itself fullls Cat. 3 (EN 954-1) PL “d” (ISO 13849-1).
If external forces act on the motor, it must not operate
without additional measures for fall protection. External
forces can arise for example, in the event of vertical axis
(suspended loads) where an unwanted movement, for
example caused by gravity, could cause a hazard. Fall
protection measures can be additional mechanical
brakes.
By default the Safe Torque O function is set to an
Unintended Restart Prevention behaviour. Therefore, to
resume operation after activation of Safe Torque O,
1. reapply 24 V DC voltage to terminal 37 (text Safe
Torque O activated is still displayed)
2. create a reset signal (via bus, Digital I/O, or
[Reset] key.
The Safe Torque O function can be set to an Automatic
Restart behaviour. Set the value of parameter 5-19 Terminal
37 Safe Stop from default value [1] to value [3].
Automatic Restart means that Safe Torque O is
terminated, and normal operation is resumed, as soon as
the 24 V DC are applied to Terminal 37. No Reset signal is
required.
Safety Instructions and Gen... VLT®Compressor Drives CDS 302/CDS 303
12 Danfoss A/S © Rev. 2013-07-03 All rights reserved. MG34M422
22

WARNING
Automatic Restart Behaviour is permitted in one of the
two situations:
1. The Unintended Restart Prevention is
implemented by other parts of the Safe Torque
O installation.
2. A presence in the dangerous zone can be
physically excluded when Safe Torque O is not
activated. In particular, paragraph 5.3.2.5 of ISO
12100-2 2003 must be observed
2.2.2 Safe Torque O Commissioning Test
After installation and before rst operation, perform a
commissioning test of an installation or application, using
Safe Torque O.
Perform the test again after each modication of the
installation or application involving the Safe Torque O.
NOTICE!
A passed commissioning test is mandatory after rst
installation and after each change to the safety instal-
lation.
The commissioning test (select one of cases 1 or 2 as
applicable):
Case 1: Restart prevention for Safe Torque O is
required (that is Safe Torque O only where
parameter 5-19 Terminal 37 Safe Stop is set to default
value [1], or combined Safe Torque O and MCB 112
where parameter 5-19 Terminal 37 Safe Stop is set to [6]
PTC 1 & Relay A or [9] PTC 1 & Relay W/A):
1.1 Remove the 24 V DC voltage supply to
terminal 37 using the interrupt device while the
frequency converter drives the motor (that is
mains supply is not interrupted). The test step is
passed when
•the motor reacts with a coast, and
•the mechanical brake is activated (if
connected)
•the alarm “Safe Torque O [A68]” is
displayed in the LCP, if mounted
1.2 Send Reset signal (via Bus, Digital I/O, or
[Reset] key). The test step is passed if the motor
remains in the Safe Torque O state, and the
mechanical brake (if connected) remains
activated.
1.3 Reapply 24 V DC to terminal 37. The test step
is passed if the motor remains in the coasted
state, and the mechanical brake (if connected)
remains activated.
1.4 Send Reset signal (via Bus, Digital I/O, or
[Reset] key). The test step is passed when the
motor becomes operational again.
The commissioning test is passed if all four test steps 1.1,
1.2, 1.3 and 1.4 are passed.
Case 2: Automatic Restart of Safe Torque O is wanted
and allowed (that is, Safe Torque O only where
parameter 5-19 Terminal 37 Safe Stop is set to [3], or
combined Safe Stop and MCB 112 where
parameter 5-19 Terminal 37 Safe Stop is set to [7] PTC 1 &
Relay W or [8] PTC 1 & Relay A/W):
2.1 Remove the 24 V DC voltage supply to
terminal 37 by the interrupt device while the
frequency converter drives the motor (that is
mains supply is not interrupted). The test step is
passed when
•the motor reacts with a coast, and
•the mechanical brake is activated (if
connected)
•the alarm “Safe Stop [A68]” is displayed
in the LCP, if mounted
2.2 Reapply 24 V DC to terminal 37.
If the motor becomes operational again, The test step is
passed. If both test steps 2.1 and 2.2 are passed, the
commissioning test is passed.
NOTICE!
See warning on the restart behaviour in
chapter 2.2.1 Terminal 37 Safe Torque O Function
WARNING
The Safe Torque O function can be used for
asynchronous, synchronous and permanent magnet
motors. Two faults can occur in the power semiconductor
of the frequency converter. When using synchronous or
permanent magnet motors a residual rotation can result
from the faults. The rotation can be calculated to Angle
= 360/(Number of Poles). The application using
synchronous or permanent magnet motors must take
this residual rotation into consideration and ensure that
it does not pose a safety risk. This situation is not
relevant for asynchronous motors.
Safety Instructions and Gen... Operating Instructions
MG34M422 Danfoss A/S © Rev. 2013-07-03 All rights reserved. 13
22

3 How to Install
3.1 Environment
3.1.1 Ambient Temperature and Altitude
The normal ambient temperature supported by the CDS is
-14000000 °F to +122 °F without derating. The CDS
operates normally down to -4 °F with only the LCP display
function impaired but without performance reduction.
For ambient temperatures above +122 °F, it is mandatory
to integrate the derating output factor for the maximum
compressor electrical motor power/current.
For altitudes above 3280 ft (1000 m), apply derating as
shown in Table 3.1.
For more details on derating due to environmental factors,
contact Danfoss technical support.
Altitude [ft/m] Derating factor
3280/1000 1
4921/1500 0.95
6561/2000 0.90
8202/2500 0.86
9842/3000 0.82
11482/3500 0.78
Table 3.1 Altitude Derating Factor
3.1.2 Environmental Requirements for
Mechanical Installation
The unit is air-cooled. To protect the unit from overheating,
ensure that the ambient temperature does not exceed the
maximum temperature stated for the 24-hour average
temperature. If the ambient temperature is in the range of
113 °F to 131 °F, derating becomes relevant. If derating for
ambient temperature is not taken into account, the service
life of the unit is reduced.
3.2 Mechanical Installation
3.2.1 Accessory Bags
Find the following parts included in the accessory bag:
130BT330.10
Figure 3.1 Enclosures B1 and B2, IP21/IP55/Type 1/Type 12
61
68
39
42
50
53
54
RELAY 1
RELAY 2
03
02
01
06
05
04
130BT346.10
WARNING:
Risk of Electric Shock - Dual supply
Discunnect mains and loadsharing before service
Figure 3.2 Enclosure B3, IP20/Chassis
61 68
39
50 53 54 5
42
03
02
01
06
05
04
99
95
130BT347.10
WARNING:
Riskof Electric Shock - Dual supply
Disconnectmains and loadsharing before service
Figure 3.3 Enclosure B4, IP20/Chassis
How to Install VLT®Compressor Drives CDS 302/CDS 303
14 Danfoss A/S © Rev. 2013-07-03 All rights reserved. MG34M422
33

130BA406.10
61 68 6
39 42 50 53 54 5
03 02 01 06 05 04
A
B
C D
EF
GHI
J K
WARNING:
Risk of Electric Shock - Dual supply
Disconnect mains and loadsharing before service
ISOA0021
Figure 3.4 Enclosures C1 and C2, IP55/66/Type 1/Type 12
99
95
6168
39
5053 54 5
42
03
02
01
06
05
04
130BT348.10
Riskof Electric Shock - Dual supply
Disconnectmains and loadsharing before service
WARNING:
RELAY1 RELAY2
Figure 3.5 Enclosure C3, IP20/Chassis
3.2.2 Mechanical Mounting
1. Drill holes in accordance with the measurements
given.
2. Provide screws suitable for the surface on which
the compressor drive should be mounted.
3. Retighten all four screws.
The frequency converter IP20 allows side-by-side instal-
lation. Because of the need for cooling, there must be a
minimum of 7.9 in (200 mm) free air passage above and
below the frequency converter.
The back wall must always be solid. All frequency
converters are equipped with a back metal plate to
guarantee proper heat exchanger ventilation. Never
remove this metal sheet.
a
b
130BA419.10
Figure 3.6 Clearance
Frame size A1*/A2/A3/A4/A5
/B1
B2/B3/B4/C
1/C3 C2/C4
a [Inch/mm] 3.3/100 7.9/200 8.9/225
b [inch/mm] 3.3/100 7.9/200 8.9/225
Table 3.2 Air Passage for Dierent Frame Sizes
How to Install Operating Instructions
MG34M422 Danfoss A/S © Rev. 2013-07-03 All rights reserved. 15
33

3.2.3 Mechanical Dimensions
IP 20 Chassis T2 [240 V] T4 [480 V] T6 [575 V]
VSH088 [15 kW] B4 B3 B3
VSH117 [18 kW] C3 B4 B4
VSH170 [22 kW] C3 B4 B4
IP 55 NEMA 12
VSH088 [15 kW] C1 B1 B1
VSH117 [18 kW] C1 B2 B2
VSH170 [22 kW] C1 B2 B2
Table 3.3 Related VSH Numbers
130BA219.11
1
130BA228.11
1
Table 3.4 Dimensional Drawings
B1 B2 B3 B4 C1 C3
Height [inch/mm]
Backplate A 18.90/480 25.59/650 15.71/399 20.47/520 26.77/680 21.65/550
Distance between mounting holes a 17.87//454 24.57/624 14.96/380 19.49/495 25.51/648 20.51/521
Width [inch/mm]
Back plate B 9.53/242 9.53/242 6.50/165 9.06/230 12.13/308 12.13/308
Distance between mounting holes b 8.28/210 8.28/210 5.51/140 7.87/200 10.71/272 10.63/270
Depth [inch/mm]
Without option C 10.24/260 10.24/260 9.80/249 9.53/242 12.21/310 13.11/333
With option C 10.24/260 10.24/260 10.24/260 9.53/242 12.21/310 13.11/333
Screw holes [inch/mm]
c 0.47/12.0 0.47/12.0 0.32 0.49/12.0
d Ø 0.75/19.0 Ø 0.75/19.0 0.47/12.0 Ø 0.75/19.0
e Ø 0.35/9 Ø 0.35/9 0.34/8.8 0.33/8.5 Ø 0.35/9 0.33/8.5
f 0.35/9 0.35/9 0.31/7.9 0.59/15 0.38/9.8 0.67/17
Other Specications
Max. weight [lbs/kg] 50.4/23 59.53/27 26.46/12 51.81/23.5 99.21/45 77.16/35
Table 3.5 Mechanical Dimensions
How to Install VLT®Compressor Drives CDS 302/CDS 303
16 Danfoss A/S © Rev. 2013-07-03 All rights reserved. MG34M422
33

3.3 Electrical Installation
3.3.1 Cables General
CAUTION
Cables general:
Always comply with national and local regulations on cable cross-sections.
Frame
size
200-240 V
[kW]
380-500 V
[kW]
525-690 V
[kW]
Cable for Tightening torque
[Nm]
B1 5.5-7.5 11-15 15
Mains, motor cables 1.8
Relay 0.5-0.6
Ground 2-3
B2 11 18.5-22 18.5-22
Mains 4.5
Motor cables 4.5
Relay 0.5-0.6
Ground 2-3
B3 5.5-7.5 11-15 15
Mains, motor cables 1.8
Relay 0.5-0.6
Ground 2-3
B4 11-15 18.5-30 18.5-22
Mains, motor cables 4.5
Relay 0.5-0.6
Ground 2-3
C3 18.5-22 - -
Mains, motor cables 10
Relay 0.5-0.6
Ground 2-3
Table 3.6 Tightening Torque
3.3.2 Removal of Knockouts for Extra Cables
•Remove cable entry from the frequency converter (avoiding foreign parts in the frequency converter when
removing knockouts)
•Support cable entry around the knockout that should be removed
•The knockout can now be removed with a strong mandrel and a hammer
•Remove burrs from the hole
•Mount cable entry on frequency converter
How to Install Operating Instructions
MG34M422 Danfoss A/S © Rev. 2013-07-03 All rights reserved. 17
33

3.3.3 Mains Connection for B1, B2 and B3
NOTICE!
Frequency converter sizes dier, but terminal numbers
are always the same. Incoming power is always 91, 92,
93 labeled L1, L2, L3.
NOTICE!
For correct cable dimensions see chapter 8 General
Specications.
130BT332.10
Figure 3.7 How to Connect to Mains and Grounding for B1
and B2
Figure 3.8 How to Connect to Mains and Grounding for B3
without RFI
130BA720.10
Figure 3.9 How to Connect to Mains and Grounding for B3
with RFI
3.3.4 Mains connection for B4, C1 and C3
NOTICE!
Frequency converter sizes dier but terminal numbers
are always the same. Incoming power is always 91, 92,
93 labeled L1, L2, L3.
How to Install VLT®Compressor Drives CDS 302/CDS 303
18 Danfoss A/S © Rev. 2013-07-03 All rights reserved. MG34M422
33