Alarms & Faults Archives

Mastering CNC Maintenance: 15 Essential Tips for Peak Performance

December 18, 2023December 15, 2023 Joe Kaminski Leave a comment

Computer Numerical Control (CNC) machines are essential tools in modern manufacturing and machining. These precision instruments can perform complex tasks with incredible accuracy. However, like any machinery, CNC machines require regular maintenance to ensure they operate efficiently and reliably. In this comprehensive guide, we’ll explore 15 essential tips for CNC maintenance to keep your equipment in optimal condition.

Chapter 1: Daily Maintenance

Cleanliness is Crucial Maintaining a clean CNC machine is paramount. Dust, chips, and debris can lead to performance issues and wear on critical components.
- Start each day by blowing away chips and dust with compressed air.
- Wipe down surfaces with a clean, lint-free cloth.
- Ensure that coolant and lubrication systems are clean and free from contamination.
Inspect Toolholders and Workholding Devices Check toolholders, collets, and workholding devices daily for signs of damage or wear. Replace any components that appear compromised to maintain precise tool alignment.
Lubrication Most CNC machines require regular lubrication. Refer to the manufacturer’s manual for a lubrication schedule and be precise in your application. Over- or under-lubrication can lead to problems.

Chapter 2: Weekly Maintenance

Examine Way Covers and Bellows Way covers and bellows protect critical machine components from contaminants. Inspect them weekly for damage or leaks and replace any compromised parts to prevent issues.
Spindle and Taper Maintenance Clean the spindle and taper thoroughly, removing debris or buildup. Inspect for wear and have them professionally serviced or replaced if necessary.
Check Electrical Connections Regularly inspect all electrical connections, wires, cables, and connectors for wear or loose connections. Reliable electrical connections are crucial for CNC machine performance and safety.

Common UNI1405 Fault Codes

March 1, 2023March 1, 2023 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!

HF81	Software Error (odd address word)
HF82	Large option module removed
HF83	Power Board Code Failure
HF84	Current Offset Trim Failure
HF85	A to D failure (ES-CC step)
HF86	Interrupt Watchdog failure
HF87	Internal ROM check error
HF88	Watchdog Failure
HF89	Unused Interrupts (nmi as source)
HF90	Stack Overflow
HF91	Stack Underflow
HF92	Software Error (undefined op code)
HF93	Software Error (protection fault)
HF94	Software Error (odd address word)
HF95	Software Error (odd address inst.)
HF96	Software Error (illegal ext bus)
HF97	Level 1 Noise
HF98	Interrupt Crash
HF99	Level 1 Crash

Sinamics S120 Fault Codes and Alarms, Part I

May 19, 2022March 26, 2024 Joe Kaminski 3 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.

Dealing with Sinamics S120 Fault Codes?

Fault codes on your Sinamics S120 can be a major setback. MRO Electric provides the expertise and parts you need to diagnose and resolve issues swiftly, ensuring your drive system runs smoothly without extended downtime.

Learn More About Our Siemens Repair Services

Shop Siemens Replacement Parts

Fanuc Power Supply Alarm Codes – Alpha Series

January 14, 2020May 18, 2020 Joe Kaminski 7 Comments

Recently we had a customer who was working on troubleshooting a FANUC CNC Power Supply alarm that he had on a machine. He was wondering what the different codes stood for, so we wanted to go ahead and list the different alarm codes for this series. These codes apply to power supplies that start with the following prefixes. The “X”s after the H will be numbered, so an example part number is A06B-6087-H130.

A06B-6081-HXXX
A06B-6083-HXXX
A06B-6077-HXXX
A06B-6091-HXXX
A06B-6120-HXXX
A06B-6140-HXXX
A06B-6110-HXXX

Here is a list of the alarm codes for these series of Power Supply Modules.

AL01: The main circuit power module (IPM) has detected am Error (PSM-5.5,-11)
Overcurrent flows into the input of the main circuit (PSM-15 to –30).

AL02: A cooling fan for the control circuit has stopped.

AL03: The Temperature of the main circuit heat sink has risen abnormally.

AL04: In the main circuit the DC voltage (DC Link) has dropped.

AL05: The main circuit capacitor was not recharged within the specified time.

AL06: The Input Power Supply is abnormal (open phase).

AL07: In the main circuit the DC Voltage at the DC link is abnormally high.

Be sure to check out our article covering FANUC CNC Troubleshooting Frequently Asked Questions here.

A06B-6087-H130 alarm codes

For more information or to get a quote on a FANUC power supply, please call 800-691-8511 or email sales@mroelectric.com.

We also provide repair services for FANUC Power Supplies.

MagneTek GPD503 Fault Codes

August 26, 2019March 3, 2020 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.

bb	External 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.
bUS	Transmission error Control data cannot be received normally for longer than 2 seconds.
CALL	Communication ready Drive is waiting for the PLC to establish communication.
CPF00	Transmission 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.)
CPF01	Transmission error Transmission error occurs 2 seconds or more after transmission has first been established.
CPF02	Base block circuit failure GPD 503 failure.
CPF03	NV-RAM (S-RAM) fault GPD 503 failure.
CPF04	NV-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.
CPF05	A/D converter failure in CPU GPD 503 failure.
CPF06	Optional connection failure Improper installation or wiring of option card.
CPF20	A/D converter failure Defective option card.
CPF21	Transmission interface card (option) self-analysis function fault Defective option card. Check option card connector for proper installation.
CPF22	Model code fault Defective option card. Check option card connector for proper installation.
CPF23	Mutual-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.
EF0	External fault GPD 503 is in Stop mode.
EF3	Ext. 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.
EF5	Ext. 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.
EF6	Ext. 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.
EF7	Ext. 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.
EF8	Ext. 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.
Err	Constant write-in fault Temporary display, in Program mode, indicating that constant setting was not written into EPROM memory.
FAn	Cooling fan failure GPD 503 is in Stop mode.
FU	Fuse blown DC Bus fuse has cleared. Check for short circuit in output, and check main circuit transistors.
GF	Ground fault protection Ground current > approx. 50% of the GPD 503 rated current.
oC	Overcurrent 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.
oH	Heat 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.
oL1	Overload Thermal motor overload protection has tripped.
oL2	Overload 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.
oL3	Overload GPD 503 output torque exceeds the set Overtorque Detection level, and GPD 503 is programmed for coast to stop at overtorque detection.
oPE01	kVA constant setting fault Sn-01 setting is incorrect.
oPE02	Constant setting range fault An-XX, bn-XX, Cn-XX, or Sn-XX setting range fault.
oPE03	Constant set value fault Sn-15 to -18 (multi-function input) set value fault.
oPE04	Constant set value fault PG constant, number of poles, or PG division rate set incorrectly.
oPE10	Constant set value fault Cn-02 to -08 (V/f data) set incorrectly.
oPE11	Constant 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.
ou	Overvoltage (OV) Detection level: Approx. 400V for 230V; Approx. 800V for 460V; Approx. 1000V for 575V.
rr	Regenerative transistor Failure Dynamic Braking resistor has failed.
rH	Braking 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 UV	Control 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

August 22, 2019March 26, 2024 Brian Hughes 2 Comments

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.

bAT	Digital Operator Battery Voltage Low - The digital operator battery is low Replace the digital operator battery.
boL	Braking Transistor Overload Fault - The wrong braking resistor is installed Select the correct braking resistor.
bUS	Option 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.
CE	MEMOBUS/Modbus Communication Error - Faulty communications wiring or an existing short circuit.
CPF02	A/D Conversion Error - Control circuit is damaged. Replace the control board or the entire drive.
CPF03	Control Board Connection Error - Turn off the power and check the connection between the control board and the drive.
CPF06	EEPROM Memory Data Error - Turn off the power and check the connection between the control board and the drive.
CPF07	Terminal Board Connection Error - Faulty connection between the terminal board and the control board. Turn off the power and reconnect the terminal board.
CPF08	Terminal Board Connection Error - Faulty connection between the terminal board and the control board. Turn off the power and reconnect the terminal board.
CPF11	Control Circuit Error - Hardware is damaged. Cycle Power. Replace hardware.
CPF12	Control Circuit Error - Hardware is damaged. Cycle Power. Replace hardware.
CPF13	Control Circuit Error - Hardware is damaged. Cycle Power. Replace hardware.
CPF14	Control Circuit Error - Hardware is damaged. Cycle Power. Replace hardware.
CPF15	Control Circuit Error - Hardware is damaged. Cycle Power. Replace hardware.
CPF16	Control Circuit Error - Hardware is damaged. Cycle Power. Replace hardware.
CPF17	Control Circuit Error - Hardware is damaged. Cycle Power. Replace hardware.Control Circuit Error - Hardware is damaged. Cycle Power. Replace hardware.
CPF18	Control Circuit Error - Hardware is damaged. Cycle Power. Replace hardware.
CPF19	Control Circuit Error - Hardware is damaged. Cycle Power. Replace hardware.
CPF20	Control Circuit Error - Hardware is damaged. Cycle Power. Replace hardware.
CPF21	Control Circuit Error - Hardware is damaged. Cycle Power. Replace hardware.
CPF22	Hybrid IC Error - Hardware is damaged. Cycle Power. Replace hardware.
CPF23	Control Board Connection Error - Hardware is damaged. Cycle Power. Replace hardware.
CPF24	Drive Unit Signal Fault - The drive capacity cannot be detected correctly. Cycle Power. Replace hardware.
CPF25	Terminal Board Not Connected - Hardware is damaged. Cycle Power. Replace hardware.
CPF26	Control Circuit Error - Hardware is damaged. Cycle Power. Replace hardware.
CPF27	Control Circuit Error - Hardware is damaged. Cycle Power. Replace hardware.
CPF28	Control Circuit Error - Hardware is damaged. Cycle Power. Replace hardware.
CPF29	Control Circuit Error - Hardware is damaged. Cycle Power. Replace hardware.
CPF30	Control Circuit Error - Hardware is damaged. Cycle Power. Replace hardware.
CPF31	Control Circuit Error - Hardware is damaged. Cycle Power. Replace hardware.
CPF32	Control Circuit Error - Hardware is damaged. Cycle Power. Replace hardware.
CPF33	Control Circuit Error - Hardware is damaged. Cycle Power. Replace hardware.
CPF34	Control Circuit Error - Hardware is damaged. Cycle Power. Replace hardware.
CPF35	Control Circuit Error - Hardware is damaged. Cycle Power. Replace hardware.
CPF40	Control Circuit Error - Hardware is damaged. Cycle Power. Replace hardware.
CPF41	Control Circuit Error - Hardware is damaged. Cycle Power. Replace hardware.
CPF42	Control Circuit Error - Hardware is damaged. Cycle Power. Replace hardware.
CPF43	Control Circuit Error - Hardware is damaged. Cycle Power. Replace hardware.
E5	SI-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.
EF0	Option Card External Fault - An external fault condition is present. Check external causes.
EF1	External Fault Terminal S1 - An external fault condition is present. Check external causes. Bad S1 Terminal.
EF2	External Fault Terminal S1 - An external fault condition is present. Check external causes. Bad S1 Terminal.
EF3	External Fault Terminal S1 - An external fault condition is present. Check external causes. Bad S1 Terminal.
EF4	External Fault Terminal S1 - An external fault condition is present. Check external causes. Bad S1 Terminal.
EF5	External Fault Terminal S1 - An external fault condition is present. Check external causes. Bad S1 Terminal.
EF6	External Fault Terminal S1 - An external fault condition is present. Check external causes. Bad S1 Terminal.
EF7	External Fault Terminal S1 - An external fault condition is present. Check external causes. Bad S1 Terminal.
EF8	External Fault Terminal S1 - An external fault condition is present. Check external causes. Bad S1 Terminal.
Err	EEPROM Write Error - Noise has corrupted data. Cycle power. Correct the parameter.
FAn	Internal Fan Fault - Internal cooling fan has malfunctioned. Check for fan operation.
FbH	Excessive PID Feedback - PID feedback input is greater than the level set to. Check parameter.
FbL	PID Feedback Loss - Check parameter. There is a problem with the feedback sensor.
GF	Ground Fault - A current short to ground exceeded 50% of rated current on the output side of the drive. Check motor/cables.
LF	Output Phase Loss - Phase loss on the output side of the drive. Check motor/cables.
LF3	Power Unit Output Phase Loss 3 - Phase loss on the output side of the drive. Check motor/cables.
nSE	Node Setup Error - A terminal assigned to the node setup function closed during run.
oC	Overcurrent - Output current greater than the specified overcurrent level. Check parameter. Check motor.
oFA01	Option Card Fault - The option card connection is faulty. Check connection. Replace hardware.
oFA03	Option Card Fault - The option card connection is faulty. Check connection. Replace hardware.
oFA04	Option Card Fault - The option card connection is faulty. Check connection. Replace hardware.
oFA05	Option Card Fault - The option card connection is faulty. Check connection. Replace hardware.
oFA06	Option Card Fault - The option card connection is faulty. Check connection. Replace hardware.
oFA10	Option Card Fault - The option card connection is faulty. Check connection. Replace hardware.
oFA11	Option Card Fault - The option card connection is faulty. Check connection. Replace hardware.
oFA12	Option Card Connection Error - The option card connection is faulty. Check connection. Replace hardware.
oFA13	Option Card Connection Error - The option card connection is faulty. Check connection. Replace hardware.
oFA14	Option Card Connection Error - The option card connection is faulty. Check connection. Replace hardware.
oFA15	Option Card Connection Error - The option card connection is faulty. Check connection. Replace hardware.
oFA16	Option Card Connection Error - The option card connection is faulty. Check connection. Replace hardware.
oFA17	Option Card Connection Error - The option card connection is faulty. Check connection. Replace hardware.
oFA30	Option Card Connection Error - The option card connection is faulty. Check connection. Replace hardware.
oFA31	Option Card Connection Error - The option card connection is faulty. Check connection. Replace hardware.
oFA32	Option Card Connection Error - The option card connection is faulty. Check connection. Replace hardware.
oFA33	Option Card Connection Error - The option card connection is faulty. Check connection. Replace hardware.
oFA34	Option Card Connection Error - The option card connection is faulty. Check connection. Replace hardware.
oFA35	Option Card Connection Error - The option card connection is faulty. Check connection. Replace hardware.
oFA36	Option Card Connection Error - The option card connection is faulty. Check connection. Replace hardware.
oFA37	Option Card Connection Error - The option card connection is faulty. Check connection. Replace hardware.
oFA38	Option Card Connection Error - The option card connection is faulty. Check connection. Replace hardware.
oFA39	Option Card Connection Error - The option card connection is faulty. Check connection. Replace hardware.
oFA40	Option Card Connection Error - The option card connection is faulty. Check connection. Replace hardware.
oFA41	Option Card Connection Error - The option card connection is faulty. Check connection. Replace hardware.
oFA42	Option Card Connection Error - The option card connection is faulty. Check connection. Replace hardware.
oFA43	Option Card Connection Error - The option card connection is faulty. Check connection. Replace hardware.
oFb00	Option Card Connection Error - The option card connection is faulty. Check connection. Replace hardware.
oFb01	Option Card Error - The option card connection is faulty. Check connection. Replace hardware.
oFb02	Option Card Error - The option card connection is faulty. Check connection. Replace hardware.
oFb03	Option Card Error - The option card connection is faulty. Check connection. Replace hardware.
oFb11	Option Card Error - The option card connection is faulty. Check connection. Replace hardware.
oFb12	Option Card Connection Error - The option card connection is faulty. Check connection. Replace hardware.
oFb13	Option Card Connection Error - The option card connection is faulty. Check connection. Replace hardware.
oFb14	Option Card Connection Error - The option card connection is faulty. Check connection. Replace hardware.
oFb15	Option Card Connection Error - The option card connection is faulty. Check connection. Replace hardware.
oFb16	Option Card Connection Error - The option card connection is faulty. Check connection. Replace hardware.
oFb17	Option Card Connection Error - The option card connection is faulty. Check connection. Replace hardware.
oFC00	Option Card Connection Error - The option card connection is faulty. Check connection. Replace hardware.
oFC01	Option Card Error - The option card connection is faulty. Check connection. Replace hardware.
oFC02	Option Card Error - The option card connection is faulty. Check connection. Replace hardware.
oFC03	Option Card Error - The option card connection is faulty. Check connection. Replace hardware.
oFC11	Option Card Error - The option card connection is faulty. Check connection. Replace hardware.
oFC12	Option Card Connection Error - The option card connection is faulty. Check connection. Replace hardware.
oFC13	Option Card Connection Error - The option card connection is faulty. Check connection. Replace hardware.
oFC14	Option Card Connection Error - The option card connection is faulty. Check connection. Replace hardware.
oFC15	Option Card Connection Error - The option card connection is faulty. Check connection. Replace hardware.
oFC16	Option Card Connection Error - The option card connection is faulty. Check connection. Replace hardware.
oFC17	Option Card Connection Error - The option card connection is faulty. Check connection. Replace hardware.
oFC50	Option Card Error - The option card connection is faulty. Check connection. Replace hardware.
oFC51	Option Card Error - The option card connection is faulty. Check connection. Replace hardware.
oFC52	Option Card Error - The option card connection is faulty. Check connection. Replace hardware.
oFC53	Option Card Error - The option card connection is faulty. Check connection. Replace hardware.
oFC54	Option Card Error - The option card connection is faulty. Check connection. Replace hardware.
oFC55	Option Card Error - The option card connection is faulty. Check connection. Replace hardware.
oH	Heatsink Overheat - Check ambient temperature. Check parameter setting.
oH1	Heatsink Overheat - Check ambient temperature. Check parameter setting.
oH4	Motor Overheat Fault (PTC input) - Check ambient temperature. Check parameter setting.
oH5	Motor Overheat Fault (NTC input) - Check ambient temperature. Check parameter setting.
oL1	Motor Overload - Load heavy. Increase accel or decel time.
oL2	Drive Overload - Load heavy. Increase accel or decel time.
oL3	Overtorque Detection 1 - current has exceeded the value set for torque detection. Check parameter setting.
oL4	Overtorque Detection 2 - current has exceeded the value set for torque detection. Check parameter setting.
oL7	High Slip Braking oL - Use braking resistor. Reduce decel time.
oPr	Operator Connection Fault - The external operator has been disconnected from the drive.
ov	Overvoltage - Deceleration time is too short and regenerative energy is flowing from the motor into the drive. Increase decel time.
PF	Input Phase Loss - Drive input power has an open phase or has a large imbalance.
rF	Braking Resistor Fault - The resistance of the braking resistor is too low.
rH	Dynamic Braking Resistor - Deceleration time is too short and excessive regenerative energy is flowing back into the drive.
rr	Dynamic Braking Transistor - The braking transistor is damaged. Cycle power to the drive and check for reoccurrence of the fault.
SC	IGBT Short Circuit or Ground Fault - IGBT failure. Cycle power to the drive and check for reoccurrence of the fault.
SEr	Too Many Speed Search Restarts - Parameters related to Speed Search are set to the wrong values.
TdE	Time Data Error - An error has occurred in the real-time clock. Replace digital operator.
THo	Thermistor Disconnect - The thermistor that detects motor temperature has become disconnected.
TIE	Time Interval Error - An error has occurred in the real-time clock. Replace digital operator.
TIM	Time Not Set - Set time in parameter o4-17.
UL3	Undertorque Detection 1 - Current is below the minimum set value. Check parameter setting.
UL4	Undertorque Detection 2 - Current is below the minimum set value. Check parameter setting.
UL6	Motor Underload - Current is below the minimum set value. Check parameter setting.
UnbC	Current Unbalance - Current flow has become unbalanced. Check for damaged transistors.
Uv1	Undervoltage - DC Bus Undervoltage. Check parameter setting. Input phase loss.
Uv2	Control Power Supply Undervoltage - Voltage is too low for the control drive input power. Ride-through power loss.
Uv3	Soft Charge Circuit Fault - Precharge relay or resistor fault. Bad precharge.
Uv4	Gate Drive Board Undervoltage - Voltage drop in the gate drive board circuit. Cycle power to see if fault reoccurs.
voF	Output Voltage Detection Fault - Problem detected with the voltage on the output side of the drive.
vToL	VT Overload - The output current of the drive has been elevated for a set length of time.

Encounter a fault code on your Yaskawa P1000 drive?

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FANUC Alarm Codes – A06B-6066 Drives – Alarm 5

April 3, 2018March 5, 2020 Brian Hughes Leave a comment

The following is a list of procedures to fix the Alarm 5 status on your drive:

If you are receiving the alarm after a fresh install of the drive, check to make sure all jumpers and wires are set in their correct position. You can find the location for these inside your user manual.
Make sure the drive is off. Check the resistances on the drive, and then test the voltage. If it has been powered up recently, you can then turn it on to check the voltage again. However, do not immediately turn it back off to check the resistances again. You must give it at least 30 minutes for the voltage to return to safe levels so that you can check again.
To check the voltage, you can test the DC voltage of the jumper attached between screws 17/18 and 19.
Using your ground on screw 19 and and the red lead on the other two screws, your reader should say anywhere from .003 to .006 volts.
To check the resistance, remove the jumper from screws 15/16 and then tighten the screws. Use an ohm reader to make sure the resistance isn’t OPEN.
Check the resistance between screws 17 and 18. If it is 16 ohms that is where you want it to be.

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Sometimes you may not have the necessary equipment to make a diagnosis on your motor, but we do. MRO Electric and Supply offers high quality repair services on all motors and spindle drives so you don’t have to worry about it. Please take a look at our website to see all available brands and parts we can service for you. Our rebuilds for these size drives usually only take 2-3 days, which includes rebuilding the part, painting the part, and fully testing the part to ensure top quality. By getting your part back to you as soon as possible, you are able to minimize downtime, and by doing the job right you can have peace of mind knowing that your FANUC drive will now work properly and not be the reason for downtime in the future.

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

Tag: Alarms & Faults