Danfoss vlt soft starter mcd 500 User manual

MAKING MODERN LIVING POSSIBLE
SService Manual
VLTpSoft Starter - MCD500
www.danfoss.com/drives
*MG17L402*
175R0550 MG17L402 Rev. 2010–11–05

Contents
1 Warnings 3
2 Troubleshooting 4
2.1 Functional Tests 4
2.1.1 Power Circuit Test 4
2.1.2 Start Performance Test 4
2.1.3 Run Performance Test 4
2.1.4 After Repair Tests 5
2.1.5 Control Input Test 5
2.2 Trip Messages 6
2.3 General Faults 9
3 Service Instructions 11
3.1 Frame Sizes 11
3.1.1 MCD5-0021B - MCD5-0053B (G1B) 12
3.1.2 MCD5-0068B - MCD5-0105B (G1B) 13
3.1.3 MCD5-0131B - MCD5-0215B (G2B) 14
3.1.4 MCD5-0245C (G3C) 15
3.1.5 MCD5-0360C - MCD5-0927C (G4C) 16
3.1.6 MCD5-1200C - MCD5-1600C (G5C) 17
4 Spare Parts 18
4.1.1 Spare Parts 18
4.1 Main Control PCB 18
4.2 Model PCB 19
4.3 Backplane PCB 20
4.4 Bypass Driver PCB 21
4.5 SCRs and SCR Connections 22
4.6 Power Assemblies 23
4.7 Snubber Assemblies 24
4.8 Fans 24
4.9 Current Transformers 26
4.10 Bypass Contactors 27
4.11 Plastics 28
4.11.1 Complete Plastics 29
4.12 Bus Bars 30
4.13 Other Spare Parts 32
5 Avoiding Damage 33
5.1 SCRs 33
Contents MCD 500 Service Manual
MG.17.L4.02 - VLT®is a registered Danfoss trademark 1

5.1.1 Typical Causes of SCR Damage 33
5.1.2 Protecting SCRs 33
5.1.3 Semiconductor Fuses 33
5.1.4 Main Contactors 33
5.2 Output Relays 33
5.2.1 Using the Soft Starter to Switch a Contactor 34
5.3 Control Input 34
6 Appendix 35
6.1.1 Input/Output Busbars to SCRs 35
6.1.2 SCRs to Heatsink 36
6.1.3 Bypass Contactor Connections 36
6.1.4 Current Transformer Busbar Assembly 37
Contents MCD 500 Service Manual
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1 Warnings
When reading this manual you will come across different
symbols that require special attention. The symbols used are
the following:
NOTE
Indicates something to be noted by the reader
CAUTION
Indicates a general warning
WARNING
Indicates a high voltage warning
The examples and diagrams in this manual are included
solely for illustrative purposes. The information contained in
this manual is subject to change at any time and without
prior notice. In no event will responsibility or liability be
accepted for direct, indirect or consequential damages
resulting from the use or application of this equipment.
NOTE
Before changing any parameter settings, ensure that the
current parameter set is saved to an internal file. Refer to
MCD 500 Operating Instructions, MG.17.KX.YY, for more
information.
WARNING
WARNING - ELECTRICAL SHOCK HAZARD
MCD 500 soft starters contain dangerous voltages when
connected to mains voltage. Only a competent electrician
should carry out the electrical installation. Improper instal-
lation of the motor or the soft starter may cause equipment
failure, serious injury or death. Follow this manual and local
electrical safety codes.
Models MCD5-0360C - MCD5-1600C: The bus bar and
heatsink are live while the unit is operating (starting, running
or stopping). If the starter is installed without a main
contactor, the bus bar and heatsink are live whenever mains
voltage is connected (including when the starter is ready or
tripped).
WARNING
Disconnect the soft starter from mains voltage before
carrying out repair work.
It is the responsibility of the user or person installing the soft
starter to provide proper grounding and branch circuit
protection according to local electrical safety codes.
Do not connect power factor correction capacitors to the
output of MCD 500 soft starters. If static power factor
correction is employed, it must be connected to the supply
side of the soft starter.
MCD5-0021B - MCD5-0105B: After transportation,
mechanical shock or rough handling there is possibility that
the bypass contactor may have latched into the on state. To
prevent the possibility of the motor starting immediately, on
first commissioning or operation after transportation, always
ensure that the control supply is applied before the power,
so that the contactor state is initialised.
In Auto On mode, the motor can be stopped using digital or
bus commands while the soft starter is connected to mains.
CAUTION
These stop functions are not sufficient to avoid unintended
start.
A motor that has been stopped may start if faults occur in
the electronics of the soft starter, or atemporary fault in the
supply mains or the motor connection ceases.
CAUTION
Use the auto-start feature with caution. Read all the notes
related to auto-start before operation.
Equipment containing electrical
components may not be disposed of
together with domestic waste.
It must be collected separately as
electrical and electronic waste
according to local and currently valid
legislation.
Warnings MCD 500 Service Manual
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2 Troubleshooting
When a protection condition is detected, the MCD 500 will
write this to the event log and may also trip or issue a
warning. The soft starter's response to some protections may
depend on the Protection Action settings (parameter group
16).
If the MCD 500 trips you will need to reset the soft starter
before restarting. If the MCD 500 has issued a warning, the
soft starter will reset itself once the cause of the warning has
been resolved.
Some protections cause a fatal trip. This response is pre-
defined and cannot be overridden. These protection
mechanisms are designed to protect the soft starter, or can
be caused by a fault within the soft starter.
2.1 Functional Tests
Use the tests in this section to identify the cause of problems
with the soft starter.
2.1.1 Power Circuit Test
This procedure tests the soft starter's power circuit, including
the SCR, Interface PCB and Main Control PCB.
Use a 500V DC insulation tester on the 200Ωscale or a
standard multimeter (voltmeter).
1. Isolate the soft starter from the incoming mains
supply and remove the control voltage.
2. Disconnect the motor cables and any external
bypass contactor cables from the soft starter.
3. Allow the soft starter to cool to room ambient
temperature.
4. Using a meter, check the resistance across each
phase of the soft starter in both directions.
•L1 to T1, T1 to L1, L2 to T2, T2 to L2, L3 to
T3 and T3 to L3.
5. If any reading is less than 200Ω,the SCR or internal
bypass relay has failed short circuit and must be
replaced.
NOTE
There is no need to replace the Main Control PCB or the
Backplane PCB just because an SCR has been damaged.
Consider replacing these parts only after first replace the
damaged SCR(s) and checking for correct operation.
6. Investigate the likely cause of SCR damage to
prevent a repeat SCR failure.
The modern SCRs used in MCD 500 soft starters are
extremely reliable and it is extremely unlikely that they will
fail due to faulty manufacture. SCR damage is almost always
caused by external influences. Often these influences can be
identified but in other cases the identification may prove
difficult or impossible because the damaging event was
temporary in nature. See Avoiding Damage for information
on typical causes of SCR damage.
2.1.2 Start Performance Test
This procedure tests that the MCD 500 soft starts correctly.
This test is performed using an AC voltmeter. During Start
mode, the On LED on the LCP should flash.
1. Connect the MCD 500 to mains voltage, control
voltage and to a motor.
2. Measure the voltage across each phase (L1-T1, L2-
T2, L3-T3). This should be close to the nominal
mains voltage (phase voltage for in-line connection
and line voltage for inside delta connection).
•If the voltage is zero, the SCR on that phase may
have failed.
•If the voltage is not equivalent to the nominal
mains voltage, the bypass contactor may be
damaged and should be replaced (models
MCD5-0021B - MCD5-0215B only).
3. Command the MCD 500 to start. While the MCD
500 is starting, measure the voltage across each
phase. The voltage should fall to less than 2 VAC
just before the soft starter reaches Run mode.
•If the voltage remains near nominal mains voltage,
the SCR is not firing correctly. Check the
connections between the Main Control PCB and
SCRs.
•If the voltage starts near nominal mains voltage
then falls to less than 2V AC just before the MCD
500 reaches Run mode, the MCD 500 is operating
correctly and the cause of the starting problem is
not the soft starter.
2.1.3 Run Performance Test
Models MCD5-0021B - MCD5-0215B incorporate internal
bypass contactors. If the internal bypass contactor does not
operate, the SCRs will eventually fail due to thermal stress.
This procedure tests the operation of the internal bypass
contactors. Use this test if the starter trips with "Bypass Fail"
or "Time Overcurrent".
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This test is performed using either an AC voltmeter.
1. Connect the MCD 500 to mains voltage, control
voltage and to a motor.
2. Measure the voltage across each phase (L1-T1, L2-
T2, L3-T3). This should be close to the nominal
mains voltage (phase voltage for in-line connection
and line voltage for inside delta connection).
•If the voltage is zero, the SCR on that phase may
have failed.
•If the voltage is not equivalent to the nominal
mains voltage, the bypass contactor may be
damaged and should be replaced.
3. Command the soft starter to start. After a
successful start, you should hear the bypass
contactors close.
•If the bypass contactors do not close, the bypass
contactor, Main Control PCB, Model PCB or Bypass
Driver PCB (models MCD5-0131B - MCD5-0215B
only) may be faulty or there may be a faulty
connection between these components.
4. When the soft starter is running, measure the
voltage across each phase. This should be less than
0.5 VAC.
5. Command the soft starter to stop and listen for the
bypass contactor to open.
NOTE
The bypass contactors used in the MCD 5-0021B ~
MCD5-0105B are latching. The MCD 500 control circuits are
designed to open the bypass contactors even in the event of
removal or loss of control voltage. However it is still possible
that the bypass contactor may be closed when there is no
control supply to the soft starter. The bypass contactors will
open when control voltage is next applied.
2.1.4 After Repair Tests
NOTE
The servicing technician is responsible for ensuring that all
electrical safety tests have been completed in accordance
with local regulations.
To test that the soft starter functions correctly after
reassembly
1. Apply control power only to the soft starter.
2. Ensure that the welcome screen displays the
correct Control/Mode/HMI firmware versions.
3. Perform a Run Simulation test using both the LCP
and remote switches.
4. Connect mains supply and motor. Test that the soft
starter functions as expected.
To test the operation of the soft starter with asmall motor (ie
amotor with acurrent rating which is much lower than that
of the soft starter)
1. Use the tools menu to load the Factory Default
parameter file for the soft starter.
2. Disable 2-4 Undercurrent Trip.
3. Connect a small motor to the output terminals of
the soft starter. Test that the soft starter functions
as expected.
NOTE
Ensure that 2-4 Undercurrent Trip is reset to its default value
after conducting tests.
2.1.5 Control Input Test
This procedure tests the condition of the soft starter control
inputs. This test is performed using a wire link.
1. Disconnect all external wiring from the soft starter's
control inputs.
2. Control voltage must still be connected to the soft
starter.
3. Connect a wire link between each input.
•If the corresponding LED lights up then the input is
operating correctly
•If the LED does not light up, the control input is
damaged. Replace the Main Control PCB
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2.2 Trip Messages
This table lists soft starter's protection mechanisms and the
probable cause of the trip. Some of these can be adjusted
using parameter group 2Protection and parameter group 16
Protection Action, other settings are built-in system
protections and cannot be set or adjusted.
Display Possible cause/Suggested solution
Battery/Clock A verification error has occurred on the real time clock, or the backup battery voltage is low. If the
battery is low and the power is off, date/time settings will be lost. Reprogram the date and time.
Related Pars.: 16-12
Current Imbalance Current imbalance can be caused by problems with the motor, the environment or the installation,
such as:
-An imbalance in the incoming mains voltage
-A problem with the motor windings
-A light load on the motor
Current imbalance can also be caused by incorrect cabling between the external bypass contactor
and the soft starter or an internal problem with the soft starter, particularly an SCR that has failed
open circuit. A failed SCR can only be definitely diagnosed by replacing the SCR and checking the
starter's performance.
Related Pars.: 2-2, 2-3, 16-2
Excess Start Time Excess start time trip can occur in the following conditions:
•1-1 Motor Full Load Current is not appropriate for the motor
•1-4 Current Limit
•1-6 Start Ramp Time has been set greater than the setting for 1-9 Excess Start Time Setting
•1-6 Start Ramp Time is set too short for a high inertia load when using Adaptive Acceleration
Control
Related Pars.: 1-1, 1-6, 1-4, 1-9, 7-9, 7-1, 7-6, 7-4, 16-7
FLC Too High The MCD 500 can support higher motor FLC values when connected to the motor using inside delta
configuration rather than in-line connection. If the soft starter is connected in-line but the
programmed setting for 1-1 Motor Full Load Current is above the in-line maximum, the soft starter will
trip at start.
Related Pars.: 1-1, 7-1
Frequency The mains frequency has gone beyond the specified range.
Check for other equipment in the area that could be affecting the mains supply (particularly variable
speed drives).
If the MCD 500 is connected to agenerator set supply, the generator may be too small or could have
a speed regulation problem.
Related Pars.: 2-8, 2-9, 2-10, 16-5
Heatsink Overtemp Check if cooling fans are operating. If mounted in an enclosure, check if ventilation is adequate.
Fans operate during Start, Run and for 10 minutes after the starter exits the Stop state.
NOTE
Models MCD5-0021B to MCD4-0053B and MCD5-0141B do not have acooling fan. Models
with fans will operate the cooling fans from a Start until 10 minutes after a Stop.
Related Pars.: 16-6
Input A Trip Identify and resolve the condition which caused Input A to activate.
Related Pars.: 3-3, 3-4, 3-5, 3-6, 3-7, 16-8
Inst Overcurrent The motor has experienced asharp rise in motor current, probably caused by alocked rotor condition
(shearpin) while running. This may indicate a jammed load.
Related Pars.: 2-6, 2-7, 16-4
Internal Fault X The MCD 500 has tripped on an internal fault. Contact your local supplier with the fault code (X).
Related Pars.: None
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Display Possible cause/Suggested solution
L1 Phase Loss
L2 Phase Loss
L3 Phase Loss
During prestart checks the starter has detected a phase loss as indicated.
In run state, the starter has detected that the current on the affected phase has dropped below 3.3%
of the programmed motor FLC for more than 1second, indicating that either the incoming phase or
connection to the motor has been lost.
Check the supply and the input and output connections at the starter and at the motor end.
Phase loss can also be caused by afailed SCR, particularly an SCR that has failed open circuit. Afailed
SCR can only be definitely diagnosed by replacing the SCR and checking the starter's performance.
Related Pars.: None
L1-T1 Shorted
L2-T2 Shorted
L3-T3 Shorted
During prestart checks the starter has detected ashorted SCR or ashort within the bypass contactor
as indicated.
Related Pars.: none
Low Control Volts The internal 24 VDC rail has dropped below 19V. This may have been caused by a fluctuation of the
control supply. Reset the trip. If the problem persists:
•The 24 V supply in the main control PCB may be faulty; or
•the bypass driver PCB may be faulty (internally bypassed models only).
These trips cannot be reset. Contact your local supplier for advice.
Related Pars: None
Motor Overload/
Motor 2 Overlaod
The motor has reached its maximum thermal capacity. Overload can be caused by:
-The soft starter protection settings not matching the motor thermal capacity.
-Excessive starts per hour
-Excessive throughput
-Damage to the motor windings.
Resolve the cause of the overload and allow the motor to cool.
Related Pars.: 1-1, 1-2, 1-3, 1-4, 7-1, 7-2, 7-3, 7-4, 16-1
Motor Connection The motor is not connected correctly to the soft starter for inline or inside delta use.
-Check individual motor connections to the soft starter for power circuit continuity.
-Check connections at the motor terminal box.
Related Pars.: 15-7
Motor Thermistor The motor thermistor input has been enabled and:
-The resistance at the thermistor input has exceeded 3.6 kΩfor more than one second.
-The motor winding has overheated. Identify the cause of the overheating and allow the motor to
cool before restarting.
-The motor thermistor input has been open.
NOTE
If a valid motor thermistor is no longer used, a 1.2 kΩresistor must be fitted across
terminals 05, 06.
Related Pars.: 16-9
Network Comms The network master has sent a trip command to the starter, or there may be a network communi-
cation problem.
Check the network for causes of communication inactivity.
Related Pars.: 16-11
Parameter out of Range -A parameter value is outside the valid range.
The starter will load the default value for all affected parameters. Press MAIN MENU to go to the first
invalid parameter and adjust the setting.
Related Pars.: None
Phase Sequence The phase sequence on the soft starter's input terminals (L1, L2, L3) is not valid.
Check the phase sequence on L1, L2, L3 and ensure the setting in Par. 2-1 is suitable for the instal-
lation.
Related Pars.: 2-1
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Display Possible cause/Suggested solution
Power Loss The starter is not receiving mains supply on one or more phases when a Start Command is given.
Check that the main contactor closes when a start command is given, and remains closed until the
end of a soft stop.
Related Pars.: 15-5
Starter/Comms -There is aproblem with the connection between the soft starter and the optional communications
module. Remove and reinstall the module. If the problem persists, contact your local distributor.
-There is an internal communications error within the soft starter. Contact your local distributor.
Related Pars.: 16-10
Thermistor Cct The thermistor input has been enabled and:
-The resistance at the input has fallen below 20 Ω(the cold resistance of most thermistors will be
over this value) or
-A short circuit has occurred. Check and resolve this condition.
Check that a PT100 (RTD) is not connected to 05, 06.
Related Pars.: None.
Time - Overcurrent The MCD 500 is internally bypassed and has drawn high current during running. (The 10A protection
curve trip has been reached or the motor current has risen to 600% of the motor FLC setting.)
Related Pars.: None
Undercurrent The motor has experienced asharp drop in current, caused by loss of load. Causes can include broken
components (shafts, belts or couplings), or a pump running dry.
Related Pars.: 2-4, 2-5, 16-3
Unsupported Option The selected function is not available (e.g. jog is not supported in inside delta configuration).
Related Pars.: None
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2.3 General Faults
This table describes situations where the soft starter does not operate as expected but does not trip or give a warning.
Symptom Probable Cause
Soft starter does not respond to commands. -If the soft starter does not respond to the RESET button on the LCP:
The soft starter may be in Auto On mode and will only accept commands from the remote
control inputs. In Auto On mode, the Auto On LED on the LCP is illuminated. Press the Hand
On or Off button to enable control via the LCP (this will also send astart or stop command to
the MCD 500).
-If the soft starter does not respond to commands from the control inputs:
The soft starter may be in Hand On mode and will only accept commands from the LCP.
When the soft starter is in Hand On control mode, the Off or Hand On LED on the LCP is
active. To change to Auto On mode, press the Auto On button once.
The control wiring may be incorrect. Check that the remote start, stop and reset inputs are
configured correctly (see Control Wiring for details).
The signals to the remote inputs may be incorrect. Test the signalling by activating each
input signal in turn. The appropriate remote control input LED should activate on the LCP.
The soft starter will only execute astart command from the remote inputs if the remote stop
input is inactive and the remote reset input is activated (the Reset LED on the starter will be
on).
-If the soft starter does not respond to a start command from either the local or remote
controls:
The soft starter may be waiting for the restart delay to elapse. The length of the restart delay
is controlled by Par. 2-11 Restart Delay.
The motor may be too hot to permit a start. If Par. 2-12 Motor Temperature Check is set to
Check, the soft starter will only permit astart when it calculates that the motor has sufficient
thermal capacity to complete the start successfully. Wait for the motor to cool before
attempting another start.
The emergency stop function may be active. If Par. 3-3 is set to Emergency Stop and there is
an open circuit on the corresponding input, the MCD 500 will not start. If the emergency
stop situation has been resolved, close the circuit on the input.
The soft starter does not control the motor
correctly during starting.
-Start performance may be unstable when using a low Motor Full Load Current setting
Par. 1-1). This can affect use on asmall test motor with full load current between 5Aand
50 A.
-Power factor correction (PFC) capacitors must be installed on the supply side of the soft
starter. To control a dedicated PFC capacitor contactor, connect the contactor to run
relay terminals.
Motor does not reach full speed. -If the start current is too low, the motor will not produce enough torque to accelerate to
full speed. The soft starter may trip on excess start time.
NOTE
Make sure the motor starting parameters are appropriate for the application and
that you are using the intended motor starting profile. If Par. 3-3 is set to Motor Set
Select, check that the corresponding input is in the expected state.
-The load may be jammed. Check the load for severe overloading or a locked rotor
situation.
Erratic motor operation. -The SCRs in the MCD 500 require at least 5Aof current to latch. If you are testing the soft
starter on a motor with full load current less than 5 A, the SCRs may not latch correctly.
Soft stop ends too quickly. -The soft stop settings may not be appropriate for the motor and load. Review the
settings of Pars. 1-10, 1-11, 7-10 and 7-11.
-If the motor is very lightly loaded, soft stop will have limited effect.
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Symptom Probable Cause
AAC adaptive acceleration control, DC brake
and Jog functions not working
-These features are only available with in-line installation. If the MCD 500 is installed inside
delta, these features will not operate.
A reset does not occur after an Auto-Reset,
when using a remote 2-wire control.
-The remote 2-wire start signal must be removed and reapplied for a re-start.
Remote start/stop command is overriding Auto
Start/Stop settings when using remote 2-wire
control.
-Auto Start/Stop function should only be used in HAND ON mode or in tandem with
HAND OFF mode, 3 and 4-wire control.
After selecting AAC the motor used an ordinary
start and/or the second start was different to
the first.
-The first AAC start is current limit so that the starter can learn from the motor character-
istics. Subsequent starts use AAC.
Non-resettable THERMISTOR CCT trip, when
there is a link between Thermistor input 05, 06
or when the motor thermistor connected
between 05, 06 is permanently removed.
-The thermistor input is enabled once a link is fitted and short circuit protection has
activated.
Remove the link then load the default parameter set. This will disable the thermistor input
and clear the trip.
Place a 1k2 Ωresistor across the thermistor input.
Turn thermistor protection to 'Log only' (Par. 16-9).
Parameter settings cannot be stored. -Make sure you are saving the new value by pressing the OK button after adjusting a
parameter setting. If you press BACK, the change will not be saved.
-Check that the adjustment lock (Par. 15-2) is set to Read/Write. If the adjustment lock is
on, settings can be viewed but not changed. You need to know the security access code
to change the adjustment lock setting.
-The EEPROM may be faulty on the Main Control PCB. A faulty EEPROM will also trip the
soft starter, and the LCP will display the message Par. Out of Range. Contact your local
supplier for advice.
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3 Service Instructions
3.1 Frame Sizes
The physical layout and spare parts for MCD 500 vary
according to the size of the starter. MCD 500 starters can be
grouped into five classes ("frame sizes") as follows:
Class MCD 500 Models
G1B MCD5-0021B
MCD5-0037B
MCD5-0043B
MCD5-0053B
MCD5-0068B
MCD5-0084B
MCD5-0089B
MCD5-0105B
G2B MCD5-0131B
MCD5-0141B
MCD5-0195B
MCD5-0215B
G3C MCD5-0245C
G4C MCD5-0360C
MCD5-0380C
MCD5-0428C
MCD5-0595C
MCD5-0619C
MCD5-0790C
MCD5-0927C
G5C MCD5-1200C
MCD5-1410C
MCD5-1600C
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3.1.1 MCD5-0021B - MCD5-0053B (G1B)
177HA536.10
1345 6
10 11 8
2 7
9
1 Cover 7 Current transformers
2 Cable guide 8 Mounting posts
3 Main plastic 9 Backplane PCB
4 Terminal blocks 10 SCRs
5 LCP and Main Control PCB 11 Side plastic
6 Model PCB
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3

3.1.2 MCD5-0068B - MCD5-0105B (G1B)
1 3 45 6
911 12
2 7
8 10 13
177HA537.10
1 Cover 8 Mounting posts
2 Cable guide 9 Bypass contactors
3 Main plastic 10 Backplane PCB
4 Terminal blocks 11 SCRs
5 LCP and Main Control PCB 12 Side plastic
6 Model PCB 13 Fan
7 Current transformers
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3.1.3 MCD5-0131B - MCD5-0215B (G2B)
1 2 45
8 9 10
36
7 11 12 13
177HA538.10
1 Cover 8 Model PCB
2 Main plastic 9 Current transformers
3 Cable guide 10 Bypass contactors
4 Terminal blocks 11 SCRs
5 LCP and Main Control PCB 12 Main body
6 Bypass Driver PCB 13 Fan and bracket
7 Support plastic
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3

3.1.4 MCD5-0245C (G3C)
12 4
7 9 10
3 5 6
811
177HA539.10
1 Cover 7 Support plastic
2 Cable guide 8 Model PCB
3 Main plastic 9 Current transformers
4 Terminal blocks 10 SCRs
5 LCP and Main Control PCB 11 Main body
6 Fan assembly
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3.1.5 MCD5-0360C - MCD5-0927C (G4C)
1 2 6
8 9 10
3 54 11 12
7
177HA540.10
1 Cover 8 Snubber assembly
2 Main plastic 9 Module mount and spacer plastic
3 Cable guide 10 Fan assembly
4 Support plastic 11 Power assembly
5 Model PCB 12 Current transformer assembly
6 Module mount and spacer plastic 13 Main body
7 Magnetic bypass plate (models <0595>C ~
0927C)
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3

3.1.6 MCD5-1200C - MCD5-1600C (G5C)
1247
8
9
36
5
10 11
177HA541.11
12 13
1 Cover 8 Snubber assembly
2 Main plastic 9 Magnetic bypass plate
3 Cable guide 10 Power assembly
4 LCP and Main Control PCB 11 Fan assembly
5 Bypass driver PCB 12 Current transformer assembly
6 Support plastic 13 Main body
7 Model PCB
Service Instructions MCD 500 Service Manual
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4 Spare Parts
4.1.1 Spare Parts
NOTE
Unless otherwise indicated, spare part kits contain only one of each item.
All images in this section are indicative.
4.1 Main Control PCB
Each soft starter requires one Main Control PCB.
CV1 CV2
T5 T7 T5 T7
MCD5-0021B
175G5603 175G5604 175G5601 175G5602
MCD5-0037B
MCD5-0043B
MCD5-0053B
MCD5-0068B
MCD5-0084B
MCD5-0089B
MCD5-0105B
MCD5-0131B
175G5607 175G5608 175G5605 175G5606
MCD5-0141B
MCD5-0195B
MCD5-0215B
MCD5-0245C
MCD5-0360C
MCD5-0380C
MCD5-0428C
MCD5-0595C
MCD5-0619C
MCD5-0790C
MCD5-0927C
MCD5-1200C
MCD5-1410C
MCD5-1600C
175G5601 - 175G5604 175G5605 - 175G5608
Spare Parts MCD 500 Service Manual
18 MG.17.L4.02 - VLT®is a registered Danfoss trademark
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4.2 Model PCB
Each soft starter requires one Model PCB.
MCD5-0021B 175G5609 MCD5-0245C 175G5621
MCD5-0037B 175G5610 MCD5-0360C 175G5622
MCD5-0043B 175G5611 MCD5-0380C 175G5623
MCD5-0053B 175G5612 MCD5-0428C 175G5624
MCD5-0068B 175G5613 MCD5-0595C 175G5625
MCD5-0084B 175G5614 MCD5-0619C 175G5626
MCD5-0089B 175G5615 MCD5-0790C 175G5627
MCD5-0105B 175G5616 MCD5-0927C 175G5628
MCD5-0131B 175G5617 MCD5-1200C 175G5629
MCD5-0141B 175G5618 MCD5-1410C 175G5630
MCD5-0195B 175G5619 MCD5-1600C 175G5631
MCD5-0215B 175G5620
175G5609 - 175G5612 175G5613 - 175G5616
175G5617 - 175G5631
Spare Parts MCD 500 Service Manual
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