Category: Troubleshooting & Repair

Common UNI1405 Fault Codes

Brian Hughes 1 Comment

Below is a table of common Unidrive faults found within the Control Techniques Unidrive series, more specifically, the UNI1405. MRO Electric offers core credit on exchanges for new and refurbished units, and have a wide selection of option cards such as the UD51, UD73, and UD77. We also repair Unidrives in-house. Contact us if you are interested in finding a new machine so we can keep your downtime to a minimum!

HF81Software Error (odd address word)
HF82Large option module removed
HF83Power Board Code Failure
HF84Current Offset Trim Failure
HF85A to D failure (ES-CC step)
HF86Interrupt Watchdog failure
HF87Internal ROM check error
HF88Watchdog Failure
HF89Unused Interrupts (nmi as source)
HF90Stack Overflow
HF91Stack Underflow
HF92Software Error (undefined op code)
HF93Software Error (protection fault)
HF94Software Error (odd address word)
HF95Software Error (odd address inst.)
HF96Software Error (illegal ext bus)
HF97Level 1 Noise
HF98Interrupt Crash
HF99Level 1 Crash
Micromaster 420

Siemens Micromaster 420 Faults and Alarms

Joe Kaminski 11 Comments

Siemens Micromaster 420: Troubleshooting Faults and Alarms

A blog we posted earlier this week about the Micromaster 420 troubleshooting referenced the Faults and Alarms list for the Micromaster series, so we decided that it would make sense to make the list of Micromaster 420 Faults and Alarms directly available. This is from the corresponding manual for the Micromaster 420 series, but it is buried within the manual which most people most likely don’t even have. Hopefully, this helps with your troubleshooting of Siemens drive fault codes and alarms.

Be sure to also check out our list of Siemens Micromaster 440 fault codes and our article touching on Siemens Simodrive E/R Module Fault Troubleshooting, along with other Siemens series coverage.

If you’re looking to purchase a Siemens Micromaster drive, view our 420 Micromaster Drives in stock. For more information or to request a quote, please call 800-691-8511 or email sales@mroelectric.com. We also provide pre-priced Micromaster 420 Repairs.

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Sinamics S120

Sinamics S120 Fault Codes and Alarms, Part I

Joe Kaminski 2 Comments

It is important to understand the differences between faults and alarms on Sinamics S120 Drives by Siemens. We have included a list of common faults and alarm codes for S120 drives, what they mean, likely causes and how to fix the fault or alarm. For more Sinamics S120 faults and alarms, check out Part II and Part III of the series that we will be posting shortly. Be sure to check out our website to browse all of our Siemens products.

Understanding Faults 

What happens when a fault occurs?

  • The appropriate fault reaction is initiated
  •  Status signal ZSW1.3 is set.
  • The fault is entered in the fault buffer.

How are faults eliminated?

  • Remove the original cause of the fault
  • Acknowledge the fault

Understanding Alarms

What happens when an alarm occurs?

  • Status signal ZSW1.7 is set.
  • Alarms are “Self Acknowledging” meaning they are reset when the cause of the alarm has been eliminated.

List of Sinamics S120 Faults and Alarms

F01000:  Internal software error

Message Value: Module: %1, Line: %2
Drive Object: All Objects
Reaction: OFF2
Acknowledge: POWER ON
Cause: An internal software error has occurred. Fault value (r0949, interpret hexadecimal)
Remedy: 

  • Evaluate fault buffer
  • Carry out a POWER ON (power on/off) for all components.
  • If required, check the data on the non-volatile memory (memory card).
  • Upgrade firmware to a later version.
  • Replace the control unit or contact MRO Electric.

F01001:  Floating Point Exception

Message Value: %1
Drive Object: All objects
Reaction: OFF2
Acknowledge: POWER ON
Cause: An exception occurred during an operation with the FloatingPoint data type. The error may be caused by the basic system or the OA application (e.g. FBLOCKS, DCC).
Remedy:

  • Carry out a POWER ON (power on/off) for all components.
  • Check configuration and signals of the blocks in FBLOCKS.
  • Check configuration and signals of DCC charts.
  • Upgrade firmware to a later version.
  • Contact Service Hotline.

F01002:  Internal software error

Message Value: %1
Drive Object: All objects
Reaction: OFF2
Acknowledge: IMMEDIATELY
Cause: An internal software error has occurred. 
Remedy: 

  • Carry out a POWER ON (power on/off) for all components.
  • Upgrade firmware to a later version.
  • Contact Service Hotline.

F01003:  Acknowledgement delay when accessing the memory

Message Value: %1
Drive Object: All objects
Reaction: OFF2
Acknowledge: IMMEDIATELY
Cause: A memory area was accessed that does not return a “READY”.
Remedy: 

  • Carry out a POWER ON (power on/off) for all components.
  • Contact Service Hotline

N01004 (F, A):  Internal software error

Message Value: %1
Drive Object: All objects
Reaction: NONE
Acknowledge: NONE
Cause: An internal software error has occurred. 
Remedy:  Read out diagnostics parameter (r9999).
Reaction upon F: OFF2
Acknowl. upon F: POWER ON
Reaction upon A:  NONE
Acknowl. upon A: NONE

F01005:  Firmware  download for DRIVE-CLiQ component unsuccessful

Message Value: Component number: %1, fault cause: %2
Drive Object: All objects
Reaction: NONE
Acknowledge: IMMEDIATELY
Cause: It was not possible to download the firmware to a DRIVE-CLiQ component
Remedy:

  • Check the selected component number
  • Check the DRIVE-CLiQ connection
  • Save suitable firmware file for download in “/siemens/sinamics/code/sac/”
  • Use a component with a suitable hardware version
  • After POWER ON has been carried out again for the DRIVE-CLiQ component,                               download the firmware again. Depending on p7826, the firmware will be                                       automatically downloaded.

A01006: Firmware update for DRIVE-CLiQ component required

Message Value: Component number: %1
Drive Object: All objects
Reaction: NONE
Acknowledge: NONE
Cause: The firmware of a DRIVE-CLiQ component must be updated as there is no suitable firmware or firmware version in the component for operation with the Control Unit.
Alarm value (r2124, interpret decimal): Component number of the DRIVE-CLiQ component
Remedy: 

  • Firmware update using the commissioning software: 
    • The firmware version of all of the components on the “Version overview” page can be read in the Project Navigator
      under “Configuration” of the associated drive unit and an appropriate firmware update can be carried out.
  • Firmware update via parameter:
    • Take the component number from the alarm value and enter into p7828.
    • Start the firmware download with p7829 = 1.

A01007: POWER ON for DRIVE-CLiQ component required

Message Value: Component number: %1
Drive Object: All objects
Reaction: NONE
Acknowledge: NONE
Cause: A DRIVE-CLiQ component must be powered up again (POWER ON) (e.g. due to a firmware update). 

Alarm value (r2124, interpret decimal): Component number of the DRIVE-CLiQ component. If the component number is 1, a POWER ON of the Control Unit is required. 
Remedy: 

  • Switch off the power supply of the specified DRIVE-CLiQ component and switch it                   on again.
  • For SINUMERIK, auto commissioning is prevented. In this case, a POWER ON is                           required for all components and the auto commissioning must be restarted.

A01009 (N):   CU: Control module overtemperature

Message Value: –
Drive Object: All objects
Reaction: NONE
Acknowledge: NONE
Cause: The temperature (r0037[0]) of the control module (Control Unit) has exceeded the specified limit value.
Remedy:

  • Check the air intake for the Control Unit.
  • Check the Control Unit fan.

MRO Electric and Supply carries new and used Sinamics modules. For more information or to request a quote, call 800-691-8511 or email sales@mroelectric.com.

How Does a Relay Work?

Ryan Dickinson 1 Comment

What Is a Relay?

A relay is an electrically controlled switch that has the ability to turn a circuit on or off. Depending on the application relays can do a number of things. Relays can be used as switches to turn things on and off, or as amplifiers to convert smaller currents into larger ones. They can also be used to control a circuit with a low power signal or when multiple circuits need to be controlled by a single signal.

There are two kinds of relays, electromechanical and solid state. In this post, we will be focusing on electromechanical relays and how they work.

Basic Parts of a Relay

Armature– is a basic metal piece that is balanced on a pivot or a stand. It is considered the moving ‘arm’ of the relay. It makes or breaks the connection with the contacts connected to it.

Spring– is connected to one end of the armature and pushes the armature back into place if no current is passing through.

Electromagnet– is a metal wire wrapped around a metal core. The wire does not have magnetic property but can be converted into a magnet with the help of an electrical signal.

Yoke– is a small metal piece affixedon a core which attracts and holds the armature when the coil is energized.

Contacts– conductive material that exists within the device whose physical contact opens or closes a circuit

A break refers to the number of locations on a circuit that a switch can make or break the flow of current. In electromechanical relays, there can be single breaks and double breaks. A single break is usually used with low power devices while a double break is usually used with high power devices.

A pole refers to the number of circuits that relays can pass through a switch. A single pole contact carries current through one circuit, while a double can carry it through two.

A throw refers to the number of separate wiring paths. For example, a triple throw switch can be connected to one of three contacts instead of one.

How Do Electromechanical Relays Work?

Source:
https://www.electronics-tutorials.ws/io/io_5.html

In an electromechanical relay, a small circuit has the ability to switch a larger circuit on or off through contacts by using an electromagnet. Some contacts come in different configurations depending on the use of the relay, namely, normally open relays and normally closed relays.

With a normally open (NO) relay, contacts are open when there is no current passing through. Once power is presented, the electromagnet will be activated. When charged, the electromagnet creates a magnetic field that attracts the armature and closes the contacts.

With a normally closed (NC) relay, contacts are closed when there is no current passing through. Unlike normally open relays, when normally closed relays become activated, the circuit will open and cause the current to stop flowing.

Types of Electromechanical Relays

Electromechanical relays can be broken down into the following distinct categories: general purpose relays, machine control relays and reed relays.

General Purpose Relays

General purpose relays are electromechanical switches that typically function via a  magnetic coil. Using an AC or DC current, general purpose relays often run at voltages such as 12V, 24V, 48V, 120V and 230V. Additionally, they can command currents ranging from 2A-30A. These relays are sought after due to them having a multitude of switch configurations and being cost-effective.

Machine Control Relays

Like general purpose relays, machine control relays are operated by a magnetic coil. Typically used to control starters and other industrial elements, these relays are robust. While this gives them greater durability, it also means that they are less economical than general purpose relays. However, with additional accessories and functionality, they have an advantage over general purpose relays.

Reed Relays

Reed relays consist of two reeds, which can open or close when controlled by an electromagnet. These small relays can operate up to eight reed switches, which are typically found inside of the electromagnetic coil. When the magnetic force is removed, the reeds return to their initial open position. Since the reeds are only a short distance apart from each other, reed relays work rather quickly. There are many benefits of using a reed relay, as their hermetic seal prevents the passage of contaminants. Additionally, this seal enables reed relays to have dependable switching.

There are many things to consider when choosing a relay for a project. Lifespan, operating environment, mechanical loads, size, and number and type of contacts are all important factors in choosing the right relay.

Pros and Cons of Electromechanical Relays

While electromechanical relays have a variety of uses, different applications require different automation devices, and electromechanical relays may not always be the best fit. To help you determine if an electromechanical relay will work for you, we have highlighted some of the advantages and disadvantages below.

Advantages

  • Fast operation and reset
  • More definitive ON/OFF
  • Simple and most reliable

Disadvantages

  • Suffers the effects of age
  • No directional features
  • Needs a large amount of input power to operate

How to Identify a Faulty Relay

Although relays are considered reliable mechanisms, they do have the capability of failing. Determining whether you have a faulty relay is simple and can be easily identified with the help of a multimeter. 

Here are a few tips on how to use your multimeter to test a relay:

  1. Remove the relay from the fuse box or vehicle.
  2. Determine where the input and output points of the circuit are located on the relay.
  3. Make sure your multimeter is set to ohm.
  4. Connect the leads of the multimeter across the entrance and exit pins to determine resistance. Ideally, you’ll see a reading between 50 to 120 ohm.
  5. If your multimeter has a reading of Open or Out of Range you may have a defective coil winding and the relay will need to be replaced.
  6. If the reading looks good, you’ll want to connect the leads in between the switch pins. You should see a reading of OL or Open.

MRO Electric and Supply has an extensive inventory of relays in stock.  Please email sales@mroelectric or call us at 800-691-8511 for a quote.

Testing Your Fanuc Servo Motor

Joe Kaminski 1 Comment

Here are some basic principles for troubleshooting a FANUC motor circuits with meter or megohm meter. This procedure will show you how to test for shorts in windings, cables, or opens. Before starting to test, make sure to turn all all the power sources to the machine and then disconnect the 3-phase motor lines from the drive end. Visually confirm that there are no problems with the cable and then begin testing.

Testing for a short to ground:

Using an Ohm meter:

  • Disconnect all power and amplifiers from machine. Check all three wires at T1, T2, and T3 (all three phases) to the ground wire. The readings for this should be infinite, and if it is zero or reads any continuity then there is a problem with the motor or the cable. For this disconnect the cable and check each separately. Be sure to make sure leads on both ends are not touching anything, including the other leads. Most servo motor shorts can be ready with a regular quality  meter going to at least 10 megaohms.

Using a Megohm meter:

  • Disconnect all power from machine. Check all three wires at T1, T2, and T3 (all three phases) to the ground wire. Reading should be between 600-2000 Megohms. Most shorts will be below 20 Megohms. Be careful not to touch the leads or the wires to anything when taking the reading because it can give a false reading. There should be about 1000 Ohms of resistance for each volt of incoming power, but this is not a standard rule. If it is 230meg to 600meg there may be deterioration in the cable.

Testing for Open or Short in the windings:

Using an Ohm meter:

  • Disconnect all power from the machine. Put meter on ohms and test T1 to T2, T2 to T3, and T1 to T3. The range should be between 0.3 and 2.0 ohms, with most being at about 0.8 ohms. If it is zero there is a short between the two phases. If it is an open the reading will be infinite or well above 2,000 ohms.

Cable and plug notes:

  • Often times the connector on the cable to the motor will get coolant in it. You can dry it out an retest, if it is still bad the inserts will get burn marks in them and cause a slight short, so they need to be replaced. If it is a DC motor, check the brushes. There should be 3-4 round caps to remove around the motor. Under these there is a spring with a square block (brush). Check to see how much is left, they may need to be replaced.

 

MRO Electric has a large stock of FANUC motors available. If you would like a replacement or spare, or if you have any questions, please call 800-691-8511 or email sales@mroelectric.com. To check out other posts, please visit our blog page. 

 

What Is CNC G Code? Common G Codes & Commands

Joe Kaminski Leave a comment

As a generic name for a plain-text language that CNC machines are able to understand, G-Codes are important to understand in the manufacturing, automation and engineering spaces. You can enter a G-Code manually if you wish, but you do not have to because of the CAD/CAM software’ abilities along with the machine controller.  G-Codes are not necessarily readable by humans, but it’s possible to look through the file and determine what is generally occurring.

What Is G Code?

In the factory automation space, nobody likes downtime and receiving error codes. While using CNCs (view FANUC CNC parts here), many professionals are faced with G Codes. By definition, a G Code is a computer code language that is used to guide CNC machine devices to perform specific motions.

What Do G Codes Do?

G Codes are important because they allow easy, repeatable control of the motion of a CNC machine. A few examples of specific motions that G Codes can control, would be:

  • canned cycles
  • work coordinates
  • several repetitive cycles.

Canned Cycles

Also referred to as a fixed cycle, canned cycles are ways to effectively and efficiently perform repetitive CNC machining operations. They automate specific machining functions. A few examples would be pocketing, threading, and drilling. A canned cycle is almost always stored as a pre-program in a machine’s controller. To learn more about canned cycles, check out this article courtesy of zero-divide.net.

Work Coordinates

The G Code coordinate pipeline goes something like this:

  • Unit conversion to metric
  • Convert from relative to absolute and polar to Cartesian: g90g91XYZ()
  • G52, G54, and G92 offsets
  • G51 scaling
  • G68 coordinate rotation

G-Code is the most popular programming language used for programming CNC machinery. Some G words alter the state of the machine so that it changes from cutting straight lines to cutting arcs. Other G words cause the interpretation of numbers as millimeters rather than inches. Some G words set or remove tool length or diameter offsets. Be sure to check out our article covering FANUC CNC Codes here.

MRO Electric and Supply has new and refurbished FANUC CNC parts available. We also offer repair pricing. For more information, please call 800-691-8511 or email sales@mroelectric.com.

What Are the Different Types of G Code Commands?

Listed below are some easily-understood G-code commands in which are used for setting the speed, feed, and tool parameters.

F= Feed

The F command’s purpose is to set the feed rate. Keep in mind, the machine operates at the specified speed rate when G1 is used, G1 commands are set to operate at the set F value.

An error is likely to occur if the feed rate (F) isn’t set once before the first G1 call.  Here is an example:

  • G1 F1500 X100 Y100

S= Spindle Speed

The S command’s purpose is to set the spindle speed. The Spindle speed is almost always set in RPMs (revolutions per minute). Here is an example:

  • S10000

T= Tool

The T command’s purpose is paired with M6 in order to display the tool number to be used for cutting the current file. Here is an example:

  • M6 T1

Common G Codes List

  • G00     Rapid traverse 
  • G01     Linear interpolation with feed rate
  • G02     Circular interpolation (clockwise)
  • G03     Circular interpolation (counterclockwise)
  • G2/G3 Helical interpolation
  • G04     Dwell time in milliseconds
  • G05     Spline definition
  • G06     Spline interpolation
  • G07     Tangential circular interpolation, Helix interpolation, Polygon interpolation, Feedrate interpolation
  • G08     Ramping function at block transition / Look ahead “off”
  • G09     No ramping function at block transition / Look ahead “on”
  • G10     Stop dynamic block preprocessing
  • G11     Stop interpolation during block preprocessing
  • G12     Circular interpolation (CW) with radius
  • G13     Circular interpolation (CCW) with radius
  • G14     Polar coordinate programming, absolute
  • G15     Polar coordinate programming, relative
  • G16     Definition of the pole point of the polar coordinate system
  • G17     Selection of the X, Y plane
  • G18     Selection of the Z, X plane
  • G19     Selection of the Y, Z plane
  • G20     Selection of a freely definable plane
  • G21     Parallel axes “on”
  • G22     Parallel axes “off”
  • G24     Safe zone programming; lower limit values
  • G25     Safe zone programming; upper limit values
  • G26     Safe zone programming “off”
  • G27     Safe zone programming “on”
  • G33     Thread cutting with constant pitch
  • G34     Thread cutting with dynamic pitch
  • G35     Oscillation configuration
  • G38     Mirror imaging “on”
  • G39     Mirror imaging “off”
  • G40     Path compensations “off”
  • G41     Path compensation left of the workpiece contour
  • G42     Path compensation right of the workpiece contour
  • G43     Path compensation left of the workpiece contour with altered approach
  • G44     Path compensation right of the workpiece contour with altered approach
  • G50     Scaling
  • G51     Part rotation; programming in degrees
  • G52     Part rotation; programming in radians
  • G53     Zero offset off
  • G54     Zero offset #1
  • G55     Zero offset #2
  • G56     Zero offset #3
  • G57     Zero offset #4
  • G58     Zero offset #5
  • G59     Zero offset #6
  • G63     Feed/spindle override not active
  • G66     Feed/spindle override active
  • G70     Inch format active
  • G71     Metric format active
  • G72     Interpolation with precision stop “off”
  • G73     Interpolation with precision stop “on”
  • G74     Move to home position
  • G75     Curvature function activation
  • G76     Curvature acceleration limit
  • G78     Normalcy function “on” (rotational axis orientation)
  • G79     Normalcy function “off”

Milling Applications

  • G80     Canned cycle “off”
  • G81     Drilling to final depth canned cycle
  • G82     Spot facing with dwell time canned cycle
  • G83     Deep hole drilling canned cycle
  • G84     Tapping or Thread cutting with balanced chuck canned cycle
  • G85     Reaming canned cycle
  • G86     Boring canned cycle
  • G87     Reaming with measuring stop canned cycle
  • G88     Boring with spindle stop canned cycle
  • G89     Boring with intermediate stop canned cycle

Cylindrical Grinding Applications

  • G81     Reciprocation without plunge
  • G82     Incremental face grinding
  • G83     Incremental plunge grinding
  • G84     Multi-pass face grinding
  • G85     Multi-pass diameter grinding
  • G86     Shoulder grinding
  • G87     Shoulder grinding with face plunge
  • G88     Shoulder grinding with diameter plunge
  • G90     Absolute programming
  • G91     Incremental programming
  • G92     Position preset
  • G93     Constant tool circumference velocity “on” (grinding wheel)
  • G94     Feed in mm / min (or inch / min)
  • G95     Feed per revolution (mm / rev or inch / rev)
  • G96     Constant cutting speed “on”
  • G97     Constant cutting speed “off”
  • G98     Positioning axis signal to PLC
  • G99     Axis offset
  • G100   Polar transformation “off”
  • G101   Polar transformation “on”
  • G102   Cylinder barrel transformation “on”; cartesian coordinate system
  • G103   Cylinder barrel transformation “on,” with real-time-radius compensation (RRC)
  • G104   Cylinder barrel transformation with centerline migration (CLM) and RRC
  • G105   Polar transformation “on” with polar axis selections
  • G106   Cylinder barrel transformation “on” polar-/cylinder-coordinates
  • G107   Cylinder barrel transformation “on” polar-/cylinder-coordinates with RRC
  • G108   Cylinder barrel transformation polar-/cylinder-coordinates with CLM and RRC
  • G109   Axis transformation programming of the tool depth
  • G110   Power control axis selection/channel 1
  • G111   Power control pre-selection V1, F1, T1/channel 1 (Voltage, Frequency, Time)
  • G112   Power control pre-selection V2, F2, T2/channel 1
  • G113   Power control pre-selection V3, F3, T3/channel 1
  • G114   Power control pre-selection T4/channel 1
  • G115   Power control pre-selection T5/channel 1
  • G116   Power control pre-selection T6/pulsing output
  • G117   Power control pre-selection T7/pulsing output
  • G120   Axis transformation; orientation changing of the linear interpolation rotary axis
  • G121   Axis transformation; orientation change in a plane
  • G125   Electronic gearbox; plain teeth
  • G126   Electronic gearbox; helical gearing, axial
  • G127   Electronic gearbox; helical gearing, tangential
  • G128   Electronic gearbox; helical gearing, diagonal
  • G130   Axis transformation; programming of the type of the orientation change
  • G131   Axis transformation; programming of the type of the orientation change
  • G132   Axis transformation; programming of the type of the orientation change
  • G133   Zero lag thread cutting “on”
  • G134   Zero lag thread cutting “off”
  • G140   Axis transformation; orientation designation workpiece fixed coordinates
  • G141   Axis transformation; orientation designation active coordinates
  • G160   ART activation
  • G161   ART learning function for velocity factors “on”
  • G162   ART learning function deactivation
  • G163   ART learning function for acceleration factors
  • G164   ART learning function for acceleration changing
  • G165   Command filter “on”
  • G166   Command filter “off”
  • G170   Digital measuring signals; block transfer with hard stop
  • G171   Digital measuring signals; block transfer without hard stop
  • G172   Digital measuring signals; block transfer with smooth stop
  • G175   SERCOS-identification number “write”
  • G176   SERCOS-identification number “read”
  • G180   Axis transformation “off”
  • G181   Axis transformation “on” with not rotated coordinate system
  • G182   Axis transformation “on” with rotated/displaced coordinate system
  • G183   Axis transformation; definition of the coordinate system
  • G184   Axis transformation; programming tool dimensions
  • G186   Look ahead; corner acceleration; circle tolerance
  • G188   Activation of the positioning axes
  • G190   Diameter programming deactivation
  • G191   Diameter programming “on” and display of the contact point
  • G192   Diameter programming; only display contact point diameter
  • G193   Diameter programming; only display contact point actual axes center point
  • G200   Corner smoothing “off”
  • G201   Corner smoothing “on” with defined radius
  • G202   Corner smoothing “on” with defined corner tolerance
  • G203   Corner smoothing with defined radius up to maximum tolerance
  • G210   Power control axis selection/Channel 2
  • G211   Power control pre-selection V1, F1, T1/Channel 2
  • G212   Power control pre-selection V2, F2, T2/Channel 2
  • G213   Power control pre-selection V3, F3, T3/Channel 2
  • G214   Power control pre-selection T4/Channel 2
  • G215   Power control pre-selection T5/Channel 2
  • G216   Power control pre-selection T6/pulsing output/Channel 2
  • G217   Power control pre-selection T7/pulsing output/Channel 2
  • G220   Angled wheel transformation “off”
  • G221   Angled wheel transformation “on”
  • G222   Angled wheel transformation “on” but angled wheel moves before others
  • G223   Angled wheel transformation “on” but angled wheel moves after others
  • G265   Distance regulation – axis selection
  • G270   Turning finishing cycle
  • G271   Stock removal in turning
  • G272   Stock removal in facing
  • G274   Peck finishing cycle
  • G275   Outer diameter / internal diameter turning cycle
  • G276   Multiple pass threading cycle
  • G310   Power control axes selection /channel 3
  • G311   Power control pre-selection V1, F1, T1/channel 3
  • G312   Power control pre-selection V2, F2, T2/channel 3
  • G313   Power control pre-selection V3, F3, T3/channel 3
  • G314   Power control pre-selection T4/channel 3
  • G315   Power control pre-selection T5/channel 3
  • G316   Power control pre-selection T6/pulsing output/Channel 3
  • G317   Power control pre-selection T7/pulsing output/Channel 3

In conclusion, becoming well-versed on CNC G-Codes, along with other codes associated with CNCs is imperative in this day and age. By having up-to-speed knowledge of CNC codes, you could most definitely set yourself apart from the average Joe.

MagneTek GPD503 Fault Codes

Brian Hughes 1 Comment

Below is a chart with fault codes regarding the MagneTek G3 GPD503 series drives. MRO Electric and Supply offers free evaluations on units. You can find our RMA form on our repair page. Follow us on Twitter @MROElectric for updates on new products and find any deals we may have.

bbExternal Base Block command
Base Block command at multi-function terminal is active, shutting off GPD 503 output (motor coasting). Temporary condition, cleared when input command is removed.
bUSTransmission error
Control data cannot be received normally for longer than 2 seconds.
CALLCommunication ready
Drive is waiting for the PLC to establish communication.
CPF00Transmission error or control function hardware fault (including internal RAM, external RAM or PROM)
Transmission between GPD 503 and remote operator is not established within 5 seconds after the power supply is turned on. (Displayed on the remote operator.)
CPF01Transmission error
Transmission error occurs 2 seconds or more after transmission has first been established.
CPF02Base block circuit failure
GPD 503 failure.
CPF03NV-RAM (S-RAM) fault
GPD 503 failure.
CPF04NV-RAM (BCC, Access Code)
fault
GPD 503 failure. This fault may be caused after changing EPROM chips. Perform a Sn-03 Reset operation to attempt to clear this fault.
CPF05A/D converter failure in CPU
GPD 503 failure.
CPF06Optional connection failure
Improper installation or wiring of option card.
CPF20A/D converter failure
Defective option card.
CPF21Transmission interface card (option) self-analysis function fault
Defective option card. Check option card connector for proper installation.
CPF22Model code fault
Defective option card. Check option card connector for proper installation.
CPF23Mutual-analysis function fault
Defective option card. Check option card connector for proper installation.
EF (blinking)Simultaneous forward and reverse operation commands
Fwd Run and Rev Run commands are both closed for more than 500 ms. Removing one command will allow drive operation.
EF0External fault
GPD 503 is in Stop mode.
EF3Ext. fault signal at term. 3
A fault condition has occurred in the external circuit(s) monitored by the contact providing input to the indicated terminal. If display is steady, GPD 503 is in Stop mode; if display is blinking, the terminal is programmed to allow continued operation after receiving fault input.
EF5Ext. fault signal at term. 5
A fault condition has occurred in the external circuit(s) monitored by the contact providing input to the indicated terminal. If display is steady, GPD 503 is in Stop mode; if display is blinking, the terminal is programmed to allow continued operation after receiving fault input.
EF6Ext. fault signal at term. 6
A fault condition has occurred in the external circuit(s) monitored by the contact providing input to the indicated terminal. If display is steady, GPD 503 is in Stop mode; if display is blinking, the terminal is programmed to allow continued operation after receiving fault input.
EF7Ext. fault signal at term. 7
A fault condition has occurred in the external circuit(s) monitored by the contact providing input to the indicated terminal. If display is steady, GPD 503 is in Stop mode; if display is blinking, the terminal is programmed to allow continued operation after receiving fault input.
EF8Ext. fault signal at term. 8
A fault condition has occurred in the external circuit(s) monitored by the contact providing input to the indicated terminal. If display is steady, GPD 503 is in Stop mode; if display is blinking, the terminal is programmed to allow continued operation after receiving fault input.
ErrConstant write-in fault
Temporary display, in Program mode, indicating that constant setting was not written into EPROM memory.
FAnCooling fan failure
GPD 503 is in Stop mode.
FUFuse blown
DC Bus fuse has cleared. Check for short circuit in output, and check main circuit transistors.
GFGround fault protection
Ground current > approx. 50% of the GPD 503 rated current.
oCOvercurrent
GPD 503 output current exceeds 200% of GPD 503 rated current, or ground fault has occurred, with ground current exceeding 50% of GPD 503 rated current.
oHHeat sink overheated
Fin temperature exceeds 90° C (194° F)
oH2 (blinking)External overheat
External temperature monitoring circuit(s) detected an overtemperature condition and produced an input signal.
oL1Overload
Thermal motor overload protection has tripped.
oL2Overload
GPD 503 overload protection has tripped.
oL3 (blinking)Overload
GPD 503 output torque exceeds the set Overtorque Detection level, but GPD 503 is programmed for continued operation at overtorque detection.
oL3Overload
GPD 503 output torque exceeds the set Overtorque Detection level, and GPD 503 is programmed for coast to stop at overtorque detection.
oPE01kVA constant setting fault
Sn-01 setting is incorrect.
oPE02Constant setting range fault
An-XX, bn-XX, Cn-XX, or Sn-XX setting range fault.
oPE03Constant set value fault
Sn-15 to -18 (multi-function input) set value fault.
oPE04Constant set value fault
PG constant, number of poles, or PG division rate set incorrectly.
oPE10Constant set value fault
Cn-02 to -08 (V/f data) set incorrectly.
oPE11Constant set value fault
One of the following conditions was detected: • Cn-23 > 5 KHz and Cn-24 5 KHz or • Cn-25 > 6 and Cn-24 > Cn-23
ou (blinking)Overvoltage
Internal monitor of DC Bus voltage indicates that input AC power is excessively high, while GPD 503 is in stopped condition.
ouOvervoltage (OV)
Detection level: Approx. 400V for 230V; Approx. 800V for 460V; Approx. 1000V for 575V.
rrRegenerative transistor Failure
Dynamic Braking resistor has failed.
rHBraking resistor unit overheated
Dynamic Braking resistor has overheated.
Uu (blinking)Low voltage (Power UV)
Internal monitor of DC Bus voltage indicates that input AC power is below Undervoltage detection level, while the GPD 503 is in stopped condition.
Uu1 Low voltage (Power UV)Occurs two seconds after detection of low voltage.
Uu2 Low voltage UVControl circuit voltage levels drop below acceptable levels during operation.
Uu3 Low voltage (MC-ANS fault)Main circuit magnetic contactor does not operate correctly.

Yaskawa P1000 Fault Codes

Brian Hughes 1 Comment

Below is a table of common fault codes found on Yaskawa P1000 units. If problems continue to occur, it may be worth replacing your unit. MRO Electric specializes in Yaskawa repair, as well as unit distribution, if you are interested in obtaining a new or refurbished P1000 unit.

bATDigital Operator Battery Voltage Low - The digital operator battery is low Replace the digital operator battery.
boLBraking Transistor Overload Fault - The wrong braking resistor is installed Select the correct braking resistor.
bUSOption Communication Error - No signal was received from the PLC. Check for faulty wiring.
CE MEMOBUS/Modbus Communication Error - Faulty communications wiring or an existing short circuit.
CEMEMOBUS/Modbus Communication Error - Faulty communications wiring or an existing short circuit.
CPF02A/D Conversion Error - Control circuit is damaged. Replace the control board or the entire drive.
CPF03Control Board Connection Error - Turn off the power and check the connection between the control board and the drive.
CPF06EEPROM Memory Data Error - Turn off the power and check the connection between the control board and the drive.
CPF07Terminal Board Connection Error - Faulty connection between the terminal board and the control board. Turn off the power and reconnect the terminal board.
CPF08Terminal Board Connection Error - Faulty connection between the terminal board and the control board. Turn off the power and reconnect the terminal board.
CPF11Control Circuit Error - Hardware is damaged. Cycle Power. Replace hardware.
CPF12Control Circuit Error - Hardware is damaged. Cycle Power. Replace hardware.
CPF13Control Circuit Error - Hardware is damaged. Cycle Power. Replace hardware.
CPF14Control Circuit Error - Hardware is damaged. Cycle Power. Replace hardware.
CPF15Control Circuit Error - Hardware is damaged. Cycle Power. Replace hardware.
CPF16Control Circuit Error - Hardware is damaged. Cycle Power. Replace hardware.
CPF17Control Circuit Error - Hardware is damaged. Cycle Power. Replace hardware.Control Circuit Error - Hardware is damaged. Cycle Power. Replace hardware.
CPF18Control Circuit Error - Hardware is damaged. Cycle Power. Replace hardware.
CPF19Control Circuit Error - Hardware is damaged. Cycle Power. Replace hardware.
CPF20Control Circuit Error - Hardware is damaged. Cycle Power. Replace hardware.
CPF21Control Circuit Error - Hardware is damaged. Cycle Power. Replace hardware.
CPF22Hybrid IC Error - Hardware is damaged. Cycle Power. Replace hardware.
CPF23Control Board Connection Error - Hardware is damaged. Cycle Power. Replace hardware.
CPF24Drive Unit Signal Fault - The drive capacity cannot be detected correctly. Cycle Power. Replace hardware.
CPF25Terminal Board Not Connected - Hardware is damaged. Cycle Power. Replace hardware.
CPF26Control Circuit Error - Hardware is damaged. Cycle Power. Replace hardware.
CPF27Control Circuit Error - Hardware is damaged. Cycle Power. Replace hardware.
CPF28Control Circuit Error - Hardware is damaged. Cycle Power. Replace hardware.
CPF29Control Circuit Error - Hardware is damaged. Cycle Power. Replace hardware.
CPF30Control Circuit Error - Hardware is damaged. Cycle Power. Replace hardware.
CPF31Control Circuit Error - Hardware is damaged. Cycle Power. Replace hardware.
CPF32Control Circuit Error - Hardware is damaged. Cycle Power. Replace hardware.
CPF33Control Circuit Error - Hardware is damaged. Cycle Power. Replace hardware.
CPF34Control Circuit Error - Hardware is damaged. Cycle Power. Replace hardware.
CPF35Control Circuit Error - Hardware is damaged. Cycle Power. Replace hardware.
CPF40Control Circuit Error - Hardware is damaged. Cycle Power. Replace hardware.
CPF41Control Circuit Error - Hardware is damaged. Cycle Power. Replace hardware.
CPF42Control Circuit Error - Hardware is damaged. Cycle Power. Replace hardware.
CPF43Control Circuit Error - Hardware is damaged. Cycle Power. Replace hardware.
E5SI-T3 Watchdog Timer Error - Data has not been received from the PLC Execute DISCONNECT or ALM_CLR, then issue a CONNECT command or SYNC_SET command.
EF0Option Card External Fault - An external fault condition is present. Check external causes.
EF1External Fault Terminal S1 - An external fault condition is present. Check external causes. Bad S1 Terminal.
EF2External Fault Terminal S1 - An external fault condition is present. Check external causes. Bad S1 Terminal.
EF3External Fault Terminal S1 - An external fault condition is present. Check external causes. Bad S1 Terminal.
EF4External Fault Terminal S1 - An external fault condition is present. Check external causes. Bad S1 Terminal.
EF5External Fault Terminal S1 - An external fault condition is present. Check external causes. Bad S1 Terminal.
EF6External Fault Terminal S1 - An external fault condition is present. Check external causes. Bad S1 Terminal.
EF7External Fault Terminal S1 - An external fault condition is present. Check external causes. Bad S1 Terminal.
EF8External Fault Terminal S1 - An external fault condition is present. Check external causes. Bad S1 Terminal.
ErrEEPROM Write Error - Noise has corrupted data. Cycle power. Correct the parameter.
FAnInternal Fan Fault - Internal cooling fan has malfunctioned. Check for fan operation.
FbHExcessive PID Feedback - PID feedback input is greater than the level set to. Check parameter.
FbLPID Feedback Loss - Check parameter. There is a problem with the feedback sensor.
GFGround Fault - A current short to ground exceeded 50% of rated current on the output side of the drive. Check motor/cables.
LFOutput Phase Loss - Phase loss on the output side of the drive. Check motor/cables.
LF3Power Unit Output Phase Loss 3 - Phase loss on the output side of the drive. Check motor/cables.
nSENode Setup Error - A terminal assigned to the node setup function closed during run.
oCOvercurrent - Output current greater than the specified overcurrent level. Check parameter. Check motor.
oFA01Option Card Fault - The option card connection is faulty. Check connection. Replace hardware.
oFA03Option Card Fault - The option card connection is faulty. Check connection. Replace hardware.
oFA04Option Card Fault - The option card connection is faulty. Check connection. Replace hardware.
oFA05Option Card Fault - The option card connection is faulty. Check connection. Replace hardware.
oFA06Option Card Fault - The option card connection is faulty. Check connection. Replace hardware.
oFA10Option Card Fault - The option card connection is faulty. Check connection. Replace hardware.
oFA11Option Card Fault - The option card connection is faulty. Check connection. Replace hardware.
oFA12Option Card Connection Error - The option card connection is faulty. Check connection. Replace hardware.
oFA13Option Card Connection Error - The option card connection is faulty. Check connection. Replace hardware.
oFA14Option Card Connection Error - The option card connection is faulty. Check connection. Replace hardware.
oFA15Option Card Connection Error - The option card connection is faulty. Check connection. Replace hardware.
oFA16Option Card Connection Error - The option card connection is faulty. Check connection. Replace hardware.
oFA17Option Card Connection Error - The option card connection is faulty. Check connection. Replace hardware.
oFA30Option Card Connection Error - The option card connection is faulty. Check connection. Replace hardware.
oFA31Option Card Connection Error - The option card connection is faulty. Check connection. Replace hardware.
oFA32Option Card Connection Error - The option card connection is faulty. Check connection. Replace hardware.
oFA33Option Card Connection Error - The option card connection is faulty. Check connection. Replace hardware.
oFA34Option Card Connection Error - The option card connection is faulty. Check connection. Replace hardware.
oFA35Option Card Connection Error - The option card connection is faulty. Check connection. Replace hardware.
oFA36Option Card Connection Error - The option card connection is faulty. Check connection. Replace hardware.
oFA37Option Card Connection Error - The option card connection is faulty. Check connection. Replace hardware.
oFA38Option Card Connection Error - The option card connection is faulty. Check connection. Replace hardware.
oFA39Option Card Connection Error - The option card connection is faulty. Check connection. Replace hardware.
oFA40Option Card Connection Error - The option card connection is faulty. Check connection. Replace hardware.
oFA41Option Card Connection Error - The option card connection is faulty. Check connection. Replace hardware.
oFA42Option Card Connection Error - The option card connection is faulty. Check connection. Replace hardware.
oFA43Option Card Connection Error - The option card connection is faulty. Check connection. Replace hardware.
oFb00Option Card Connection Error - The option card connection is faulty. Check connection. Replace hardware.
oFb01Option Card Error - The option card connection is faulty. Check connection. Replace hardware.
oFb02Option Card Error - The option card connection is faulty. Check connection. Replace hardware.
oFb03Option Card Error - The option card connection is faulty. Check connection. Replace hardware.
oFb11Option Card Error - The option card connection is faulty. Check connection. Replace hardware.
oFb12Option Card Connection Error - The option card connection is faulty. Check connection. Replace hardware.
oFb13Option Card Connection Error - The option card connection is faulty. Check connection. Replace hardware.
oFb14Option Card Connection Error - The option card connection is faulty. Check connection. Replace hardware.
oFb15Option Card Connection Error - The option card connection is faulty. Check connection. Replace hardware.
oFb16Option Card Connection Error - The option card connection is faulty. Check connection. Replace hardware.
oFb17Option Card Connection Error - The option card connection is faulty. Check connection. Replace hardware.
oFC00Option Card Connection Error - The option card connection is faulty. Check connection. Replace hardware.
oFC01Option Card Error - The option card connection is faulty. Check connection. Replace hardware.
oFC02Option Card Error - The option card connection is faulty. Check connection. Replace hardware.
oFC03Option Card Error - The option card connection is faulty. Check connection. Replace hardware.
oFC11Option Card Error - The option card connection is faulty. Check connection. Replace hardware.
oFC12Option Card Connection Error - The option card connection is faulty. Check connection. Replace hardware.
oFC13Option Card Connection Error - The option card connection is faulty. Check connection. Replace hardware.
oFC14Option Card Connection Error - The option card connection is faulty. Check connection. Replace hardware.
oFC15Option Card Connection Error - The option card connection is faulty. Check connection. Replace hardware.
oFC16Option Card Connection Error - The option card connection is faulty. Check connection. Replace hardware.
oFC17Option Card Connection Error - The option card connection is faulty. Check connection. Replace hardware.
oFC50Option Card Error - The option card connection is faulty. Check connection. Replace hardware.
oFC51Option Card Error - The option card connection is faulty. Check connection. Replace hardware.
oFC52Option Card Error - The option card connection is faulty. Check connection. Replace hardware.
oFC53Option Card Error - The option card connection is faulty. Check connection. Replace hardware.
oFC54Option Card Error - The option card connection is faulty. Check connection. Replace hardware.
oFC55Option Card Error - The option card connection is faulty. Check connection. Replace hardware.
oHHeatsink Overheat - Check ambient temperature. Check parameter setting.
oH1Heatsink Overheat - Check ambient temperature. Check parameter setting.
oH4Motor Overheat Fault (PTC input) - Check ambient temperature. Check parameter setting.
oH5Motor Overheat Fault (NTC input) - Check ambient temperature. Check parameter setting.
oL1Motor Overload - Load heavy. Increase accel or decel time.
oL2Drive Overload - Load heavy. Increase accel or decel time.
oL3Overtorque Detection 1 - current has exceeded the value set for torque detection. Check parameter setting.
oL4Overtorque Detection 2 - current has exceeded the value set for torque detection. Check parameter setting.
oL7High Slip Braking oL - Use braking resistor. Reduce decel time.
oPrOperator Connection Fault - The external operator has been disconnected from the drive.
ovOvervoltage - Deceleration time is too short and regenerative energy is flowing from the motor into the drive. Increase decel time.
PFInput Phase Loss - Drive input power has an open phase or has a large imbalance.
rFBraking Resistor Fault - The resistance of the braking resistor is too low.
rHDynamic Braking Resistor - Deceleration time is too short and excessive regenerative energy is flowing back into the drive.
rrDynamic Braking Transistor - The braking transistor is damaged. Cycle power to the drive and check for reoccurrence of the fault.
SCIGBT Short Circuit or Ground Fault - IGBT failure. Cycle power to the drive and check for reoccurrence of the fault.
SErToo Many Speed Search Restarts - Parameters related to Speed Search are set to the wrong values.
TdETime Data Error - An error has occurred in the real-time clock. Replace digital operator.
THoThermistor Disconnect - The thermistor that detects motor temperature has become disconnected.
TIETime Interval Error - An error has occurred in the real-time clock. Replace digital operator.
TIMTime Not Set - Set time in parameter o4-17.
UL3Undertorque Detection 1 - Current is below the minimum set value. Check parameter setting.
UL4Undertorque Detection 2 - Current is below the minimum set value. Check parameter setting.
UL6Motor Underload - Current is below the minimum set value. Check parameter setting.
UnbCCurrent Unbalance - Current flow has become unbalanced. Check for damaged transistors.
Uv1Undervoltage - DC Bus Undervoltage. Check parameter setting. Input phase loss.
Uv2Control Power Supply Undervoltage - Voltage is too low for the control drive input power. Ride-through power loss.
Uv3Soft Charge Circuit Fault - Precharge relay or resistor fault. Bad precharge.
Uv4Gate Drive Board Undervoltage - Voltage drop in the gate drive board circuit. Cycle power to see if fault reoccurs.
voFOutput Voltage Detection Fault - Problem detected with the voltage on the output side of the drive.
vToLVT Overload - The output current of the drive has been elevated for a set length of time.

Yaskawa SIGMA 5 Troubleshooting

Saif Afridi 1 Comment

Yaskawa has established a firm position as the leading international developer of servo products in recent years, surpassing its competitors with innovation and utilization of advanced modern technologies.

Its Sigma 5 series is absolutely top of the class! Incorporated with the latest and most desirable features, this fleet of servo products does not disappoint. The Sigma 5 series catalog is briefly over-viewed below.

  • SERVOPACKs is a series consisting of high-end networkable amplifiers that support motors up to 55 kW
  • Rotary Servo Motors with outputs in the wide range of 50W – 15kW
  • Direct Drive Servomotors with peak torque 6-600 Nm
  • Linear Servomotors are directly driven by a coil
  • Linear Slides complete the package for customers using linear servomotors, comprising of components such as slides, carriages, etc.

With such a versatile range of products, Sigma 5 series is easily what you would want to have in your workshops and industries.

SGMGV-09ADA61

All servo drives are tailored according to contemporary market demands. With so many different kinds of motors, the drives make use of complex algorithms that allow engineers to exercise precise control over the motor output, helping them achieve the accuracy modern applications require.

Yaskawa is highly regarded among consumers and the industry for its professionalism. From product development to customer dealing, this quality shows through at each stage, and this is exactly what puts this company at the top.

This blog is dedicated to one aspect of this characteristic: Troubleshooting. Sigma 5 series is undoubtedly the most functional of all but this also means that the intricacies involved can sometimes be difficult to handle.

If one of these products does not perform as it should be, troubleshooting it should be something that field engineers should be able to do. Thankfully, the Sigma 5 series is accompanied by clear troubleshooting guidelines and is one of the most easy to handle.

  • Product Documentation

Each product comes with comprehensive documentation that can be accessed at any time to gain in-depth knowledge of its working. These documents contain important information like dedicated troubleshooting guides, operating parameter, alarm lists, product structure, and specifications.

With this information at hand, troubleshooting any of the Sigma 5 products becomes a piece of cake!

  • Software Support

Sigma 5 series comes with a very supportive software suite as well which can serve as the perfect troubleshooting tool. During installation and operation, these software used extensively for product setup and configuration.

The SigmaWin+ is an intuitive tool that allows convenient setup of each servo product. If you observe anything out of the normal with your Sigma 5 products, the first thing to do would be to check whether the configuration settings are compatible with your application.

Its most helpful function is the alarm diagnostic function. Troubleshooting is usually initiated after a machine raises an alarm. This software is designed to identify all the possible reasons that might have generated a specific alarm, and presents possible corrective measures as well.

Moreover, SigmaWin+ has enhanced features such as wiring check and auto-tuning of multiple parameters. Using these you can not only find the loopholes you are looking for but also optimize operations.

  • Yaskawa Customer Support

To top off the aforementioned troubleshooting options, MRO’s Repair team is always available for help. If you are experiencing a mind-boggling issue with your Sigma 5 products, this team is the go-to. Apart from repair work, MRO Electric and Supply has a core exchange program that saves the buyer time and money when receiving their new unit.

ATS48 Soft Start Troubleshooting and Introduction

Brian Hughes 9 Comments

The Altistart 48(ATS48) series of soft starters by Square D and Schneider Electric allows for consistent start/stop rates that are independent of motor loads. These devices are more advanced than the standard drives that cannot control the applied motor torque. Featuring contact wiring and control, the soft starter allows for near-seamless integration with existing operations. Many preset parameters are included with the device and they cover a large spectrum of operations. Additional parameters may also be loaded up to meet specific needs. Available power ratings include:

  • 3 – 200 HP @ 208VAC, 60 Hz
  • 5 – 250 HP @ 230VAC, 60 Hz
  • 10 – 500 HP @ 460VAC, 60 Hz
  • 15 – 600 HP @ 575VAC, 60Hz

The ATS48 series features a dual configuration of two motors which allows for a cascaded start/stop in many operations. Using the Torque Control System(TCS) the unit can minimize wear on gears which allows for less time servicing the unit.

The Altistart 48 series takes advantage of the PowerSuite™ software for programming of your drive or soft starter.  With this software, you will be able to monitor and document all of your operations. Configurations are easily saved via hard disk, CD-ROM, flash memory, etc. Using Ethernet technology, the user is able to configure and monitor operations on the go, and a constant feed of information allows for real-time opportunity to modify and adjust configuration files on the fly.

Troubleshooting can be an issue for people when so many different things are going on. It just isn’t feasible to stop operations every time an error occurs. Below is a list of fault codes for the ATS48 Soft Start series that will help determine most issues:

Fault CodeDescription
nLP
rdY		Soft start without run command and:
• Line power not supplied
• Line power supplied
tbSStarting time delay not elapsed
HEAMotor preheating in progress
(Use SUP menu to set up monitoring
parameter. Factory setting: Motor Current.)		Soft start with run command
brLSoft start braking
StbWaiting for a command (RUN or STOP) in
cascade mode
CFF Invalid configuration on power-up
CFI Invalid configuration
CLFLoss of Control Power
EEFInternal memory fault
EtFExternal fault
ErFLine frequency out of tolerance
InFInternal fault
LrFLocked rotor fault
OCFOvercurrent fault
OHFSoft start overheating fault
OLCCurrent overload fault
OLFMotor overload/ground fault
OtFMotor thermal fault detected by PTC probes
PHFLoss of line or motor phase
PIFPhase reversal fault
SLFSerial link fault
StFExcessive starting time
ULFMotor underload fault
USFLack of AC line power on a run command

MRO Electric and Supply carries all models of this unit and has a fast and easy repair service to get your unit fixed and back into your hands as soon as possible.