Electrosurgical units · LigaSure family

Covidien LigaSure: troubleshooting and error codes

The ServiceForge knowledge base holds 62 documented symptoms for the Covidien LigaSure, with 122 ranked causes, 123 diagnostic checks with test points and expected values, and 126 error codes. Each symptom below shows its causes and the first check; the rest is one connection away. Connect ServiceForge to your AI

Symptoms

Generator does not respond when turned on high voltage

Unit does not power up or respond to power switch activation

Ranked causes

1. Disconnected power cord, faulty wall receptacle, or faulty power cord (common)
2. Loose or disconnected internal cables (common)
3. Fuse drawer open or fuses blown (common)
4. Faulty power entry module or connections (occasional)
5. Faulty low voltage power supply (occasional)
6. Damaged control board connectors or malfunctioning control board (occasional)
7. Faulty power switch (occasional)
8. Malfunctioning front panel components (occasional)
9. Shorts or disconnects on HV power supply (rare)
10. Shorts or disconnects on RF board (rare)

First check

Verify power cord connections

Test point: Generator power inlet and wall receptacle
Expected: Power cord firmly connected at both ends

3 more checks with pass and fail actions, 10 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Generator is on but did not complete self-test

Unit powers on but fails to complete self-test sequence during startup

Ranked causes

1. An alarm condition exists (common)
2. Software malfunction (occasional)
3. Loose or disconnected internal cables (occasional)
4. Faulty low voltage power supply (occasional)
5. Damaged control board connectors or malfunctioning control board (occasional)
6. Faulty power switch (rare)
7. Malfunctioning front panel components (rare)
8. Shorts or disconnects on HV power supply (rare)
9. Shorts or disconnects on RF board (rare)

First check

Observe display for alarm number

Test point: Display screen
Expected: Alarm number displayed or none visible

2 more checks with pass and fail actions, 9 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Generator on and activated but no output delivered

Generator powers on and accessory activates but no RF output is produced

Ranked causes

1. Malfunctioning footswitching or handswitching instrument (common)
2. Footswitch connected to wrong receptacle (common)
3. Handset connected to wrong receptacle (common)
4. Power set too low (common)
5. Alarm condition exists (occasional)
6. Blown fuse on power supply (occasional)
7. Control board malfunction (occasional)
8. RF output stage malfunction (occasional)

13 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

Buttons do not function correctly when pressed

Front panel buttons do not respond to button presses

Ranked causes

1. Faulty ribbon cable between control board and display board (common)
2. Incorrect information communicated through control board (occasional)
3. Faulty ribbon cable between front panel and display board (occasional)
4. Incorrect information from front panel (occasional)

4 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

Footswitch will not activate output

Footswitch does not trigger RF output generation

Ranked causes

1. Malfunctioning or damaged footswitch receptacle (common)
2. Footswitch activation signal lost on control board (occasional)
3. Wrong footswitch type connected (common)
4. Invalid smart code (occasional)

6 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

Front panel button pressed during powerup test

One or more front panel buttons (MEMORY, SEAL_UP, SEAL_DOWN, MACRO_UP, MACRO_DOWN, COAG_UP, COAG_DOWN) appeared pressed during powerup key test.

Ranked causes

1. Front panel button physically stuck or pressed during powerup (common)
2. Front panel ribbon cable loose or faulty (occasional)
3. Display board ribbon cable loose or faulty (occasional)
4. Control board fault (occasional)

First check

Power cycle without button presses

Test point: Power switch
Expected: No front panel button errors 126-132 on powerup

2 more checks with pass and fail actions, 4 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Blank or confusing LED display

Display shows no information or incorrect data

Ranked causes

1. Faulty ribbon cable between control board and display board (common)
2. Incorrect display information communicated through control board (occasional)
3. Display board malfunction (occasional)

3 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

Continuous monitor interference caution

Monitor displays interference when generator or devices are in operation

Ranked causes

1. Faulty chassis-to-ground connections (common)
2. Electrical equipment grounding connected to different objects (occasional)
3. Malfunctioning monitor (occasional)

3 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

Feedback DOSERR circuit test failed

Powerup test of DOSERR circuitry failed. Failure detected by feedback processor.

Ranked causes

1. Control board DOSERR circuit fault (occasional)
2. High voltage power supply failure (occasional)
3. RF output FET Q5 failure on RF board (occasional)

First check

Power cycle the unit

Test point: Power switch
Expected: DOSERR test passes without error 145

4 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

Footswitch key down during powerup test

One or more footswitch keys (VS_CUT, VS_COAG, BIP_CUT, BIP_COAG, VS_SEAL, VS_CUT_HAND) activated during powerup key test.

Ranked causes

1. Footswitch or accessory pressed during powerup or stuck (common)
2. Footswitch board ribbon cable loose or damaged (occasional)
3. Ribbon cable integrity failure or control board fault (occasional)

First check

Power cycle without button presses

Test point: Power switch
Expected: No footswitch errors 120-125 on powerup

1 more check with pass and fail actions, 4 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Footswitch receptacle connection loose or damaged caution

Footswitch does not seat securely in rear panel receptacle or has visible damage

Ranked causes

1. Loose footswitch connector/receptacle mating (common)
2. Defective footswitch (occasional)
3. Damaged footswitch board assembly (occasional)

First check

Inspect rear panel footswitch receptacles

Test point: bipolar footswitch receptacle (blue band) and vessel sealing footswitch receptacle (purple band)
Expected: No obstructions or visible damage

1 more check with pass and fail actions, 3 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Handset receptacle connection loose or damaged caution

Bipolar handset does not seat securely in front panel receptacle or has visible damage; receptacle indicator does not illuminate green

Ranked causes

1. Loose handset connector/receptacle mating (common)
2. Defective handset (occasional)
3. Damaged front panel (occasional)

First check

Inspect front panel handset receptacle

Test point: bipolar handset receptacle (blue) or vessel sealing handset receptacle (purple)
Expected: No obstructions or visible damage

1 more check with pass and fail actions, 3 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Interference with other devices during generator activation caution

Other equipment experiences interference only when generator is activated

Ranked causes

1. Metal-to-metal sparking (common)
2. Electrically inconsistent ground wires in operating room (occasional)
3. Monitor responding to radiated frequencies (occasional)

3 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

Master microprocessor DOSERR test failure

Master microprocessor reported a powerup DOSERR test failure.

Ranked causes

1. Control board fault (occasional)
2. High voltage power supply failure (occasional)
3. RF output FET Q5 failure on RF board (occasional)

First check

Power cycle the unit

Test point: Power switch
Expected: DOSERR test passes without error 115

4 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

No activation or alarm tone; speaker malfunctioning

Speaker fails to produce activation tone or alarm sound during operation

Ranked causes

1. Poor connection or damaged footswitch board ribbon cable (common)
2. Faulty connections or speaker on footswitch board (common)
3. Audio signal malfunction on control board (occasional)

First check

Inspect footswitch board ribbon cable connection

Test point: Footswitch board ribbon cable connector
Expected: Cable firmly seated with no visible damage

1 more check with pass and fail actions, 3 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Power calculation overflow in feedback

Feedback calculation of power overflowed.

Ranked causes

1. Sensor signal too high or control board fault (occasional)
2. Control board fault (occasional)
3. RF board fault (occasional)

First check

Power cycle the unit

Test point: Power switch
Expected: Power calculation without overflow, error 164

2 more checks with pass and fail actions, 5 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Smart card reads invalid handset

System detects invalid handset when Smart Connector card is read

Ranked causes

1. Faulty handset (common)
2. Handset not valid for receptacle (common)
3. Faulty smart card (occasional)

3 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

Abnormal neuromuscular stimulation patient safety

Patient experiences abnormal neuromuscular stimulation; surgery should stop immediately

Ranked causes

1. Metal-to-metal sparking (common)
2. Abnormal 50-60 Hz leakage currents (occasional)

2 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

Feedback A/D conversion error during powerup

Feedback processor detected an A/D error during power up.

Ranked causes

1. Control board A/D conversion fault (occasional)
2. Low voltage power supply failure (occasional)

First check

Power cycle the unit

Test point: Power switch
Expected: A/D test passes without error 146

3 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

Master A/D conversion error during powerup

Master processor detected an A/D error during powerup.

Ranked causes

1. Control board A/D conversion fault (occasional)
2. Low voltage power supply failure (occasional)

First check

Power cycle the unit

Test point: Power switch
Expected: A/D test passes without error 134

3 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

Overcurrent during voltage sensor calibration caution

Overcurrent condition discovered during voltage sensor (Vsns) calibration.

Ranked causes

1. Load impedance higher than specified during calibration (common)
2. RF board malfunction (occasional)

First check

Verify load impedance during calibration

Test point: Calibration load
Expected: Load impedance as specified in calibration instructions

2 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

Overvoltage during current sensor calibration caution

Overvoltage condition discovered during current sensor (Isns) calibration indicating load impedance issue.

Ranked causes

1. Load impedance higher than specified during calibration (common)
2. Control board malfunction (occasional)

First check

Verify load impedance during calibration

Test point: Calibration load
Expected: Load impedance as specified in calibration instructions

2 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

Battery backed RAM CRC corrected

Battery backed RAM CRC test failed during initialization but data was restored from RTC data.

Ranked causes

1. Bad battery or failed memory chip (U3) (occasional)

First check

Monitor for error recurrence

Test point: Unit operation
Expected: No recurrence of error 106

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

Battery backed RAM CRC failed at initialization

Battery backed RAM CRC test failed during initialization and correction attempt failed.

Ranked causes

1. Bad battery or failed memory chip (U3) (common)

First check

Inspect and test battery

Test point: Battery on control board
Expected: Battery functional and holding charge

2 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

Bipolar key press resulted in complete failure patient safety

A bipolar MACRO or bipolar COAG key press resulted in a COMPLETE_FAIL outcome from the feedback processor.

Ranked causes

1. Control board or feedback processor fault during RF output (occasional)

First check

Power cycle the unit

Test point: Power switch
Expected: Bipolar key press succeeds without error 170

2 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

Calibration data invalid at powerup

Calibration data invalid at powerup and could not be recovered.

Ranked causes

1. Corrupted or missing calibration data (common)

First check

Run calibration procedure

Test point: Unit calibration system
Expected: Calibration completes successfully

3 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

DOSERR ECON and HV_SEN mismatch during keying

Sys_Econ and HV_SNS do not compare within limits during keying.

Ranked causes

1. Control board or high voltage power supply fault (occasional)

First check

Power cycle the unit

Test point: Power switch
Expected: ECON and HV_SEN within limits during keying

3 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

DOSERR test memory corrupted

Doserror test state variable corrupted during powerup dose error test.

Ranked causes

1. Control board memory fault (common)

First check

Power cycle the unit

Test point: Power switch
Expected: DOSERR test memory passes without error 116

2 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

DPRAM communication failure at powerup

Master and feedback processors fail to communicate on power up. Timing or content of communication invalid.

Ranked causes

1. Control board communication or processor fault (common)

First check

Power cycle the unit

Test point: Power switch
Expected: DPRAM communication succeeds without error 118

2 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

Dual port RAM failed initialization

DPRAM failed test during initialization.

Ranked causes

1. DPRAM chip failure or control board fault (common)

First check

Power cycle the unit

Test point: Power switch
Expected: DPRAM passes test without error 103

2 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

Error counts CRC invalid at powerup

Error counts kept in battery backed RAM have invalid CRC at powerup.

Ranked causes

1. Battery failure or control board fault (common)

First check

Monitor system status

Test point: Battery backed RAM
Expected: No CRC errors in error counts

2 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

Error disable variables corrupted in master

Master error disable variables are equal when they should be inverse: mm_errors_enabled == curr_settings.errs_disabled.

Ranked causes

1. Memory corruption in control board (rare)

First check

Power cycle the unit

Test point: Power switch
Expected: Error variables correctly inverse without error 163

2 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

Feedback calibration data corrupted

Feedback processor detected corrupted calibration data during powerup.

Ranked causes

1. Calibration data corruption or control board fault (common)

First check

Power cycle the unit

Test point: Power switch
Expected: Calibration data valid without error 143

2 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

Feedback DOSERR test memory corrupted

Feedback processor detected corrupted memory during dose error circuit test at powerup.

Ranked causes

1. Memory corruption or control board fault (common)

First check

Power cycle the unit

Test point: Power switch
Expected: DOSERR memory test passes without error 144

2 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

Feedback dual port RAM error during powerup

Feedback processor detected an error in dual port RAM during powerup.

Ranked causes

1. DPRAM failure or control board fault (common)

First check

Power cycle the unit

Test point: Power switch
Expected: DPRAM test passes without error 141

2 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

Feedback ECON calculation overflow

Feedback calculation of starting ECON overflowed.

Ranked causes

1. Control board calculation or processor fault (rare)

First check

Power cycle the unit

Test point: Power switch
Expected: No ECON overflow error 162

2 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

Feedback error disable variables corrupted

Feedback error disable variables are equal when they should be inverse: fb_errors_enabled == local_curr_settings.errs_disabled.

Ranked causes

1. Memory corruption in feedback processor (rare)

First check

Power cycle the unit

Test point: Power switch
Expected: Feedback error variables correctly inverse without error 169

2 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

Feedback external memory error during powerup

Feedback processor detected an error in external memory during powerup.

Ranked causes

1. External RAM failure or control board fault (common)

First check

Power cycle the unit

Test point: Power switch
Expected: External memory test passes without error 140

2 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

Feedback ROM CRC error during powerup

Feedback processor detected an error in program memory during powerup.

Ranked causes

1. Flash memory corruption or control board fault (common)

First check

Power cycle the unit

Test point: Power switch
Expected: ROM CRC test passes without error 142

2 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

Flash memory CRC test failed

CRC test of ST Microelectronics Flash Memory failed during initialization.

Ranked causes

1. Flash memory corruption or control board fault (common)

First check

Power cycle the unit

Test point: Power switch
Expected: Flash CRC passes test without error 104

2 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

Generator does not detect instrument or adapter

Generator fails to recognize vessel sealing instrument, bipolar instrument, or Smart Connector Adapter

Ranked causes

1. Instrument not properly inserted (common)

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

Invalid error code from powerup self test

Bad error code supplied by powerup self test routine on the master side during initialization.

Ranked causes

1. Control board self-test failure (common)

First check

Power cycle the unit

Test point: Power switch
Expected: Unit initializes without error 100

2 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

Invalid output request during feedback

Feedback enable_output_relays detected illegal combination of generator mode and RF output side for output relay configuration.

Ranked causes

1. Control board firmware or hardware fault (common)

First check

Power cycle the unit

Test point: Power switch
Expected: Unit restarts without error 025

2 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

Last power settings CRC invalid at powerup

Last power settings structure in battery backed RAM has invalid CRC at powerup.

Ranked causes

1. Battery failure or control board fault (common)

First check

Monitor system status

Test point: Battery backed RAM
Expected: No CRC errors in power settings

2 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

Master unable to reset feedback microprocessor

Master unable to reset feedback microprocessor at initialization.

Ranked causes

1. Feedback microprocessor or control board fault (common)

First check

Power cycle the unit

Test point: Power switch
Expected: Microprocessor resets successfully without error 101

2 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

Microprocessor compatibility error

Incompatible software versions on feedback and master processors or master side software incompatible with digital board type.

Ranked causes

1. Software version mismatch between processors or boards (occasional)

First check

Power cycle the unit

Test point: Power switch
Expected: Software versions compatible without error 117

2 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

Minutes on data CRC invalid at powerup

Minutes on data kept in battery backed RAM has invalid CRC at powerup.

Ranked causes

1. Battery failure or control board fault (common)

First check

Monitor system status

Test point: Battery backed RAM
Expected: No CRC errors in minutes on data

2 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

Pacemaker interference patient safety

Pacemaker experiences interference from generator operation

Ranked causes

1. Intermittent connections or metal-to-metal sparking (common)

2 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

Power calculation overflow in master

Master calculation of power overflowed.

Ranked causes

1. Control board processor or calculation fault (rare)

First check

Power cycle the unit

Test point: Power switch
Expected: Power calculation without overflow, error 165

2 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

Real time clock CRC corrected

Real time clock RAM CRC test failed during initialization but data was restored from battery backed RAM.

Ranked causes

1. Bad battery or failed RTC chip (U1) (occasional)

First check

Monitor for error recurrence

Test point: Unit operation
Expected: No recurrence of error 108

2 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

Real time clock CRC failed at initialization

Real time clock RAM CRC test failed during initialization and correction attempt failed.

Ranked causes

1. Bad battery or control board fault (common)

First check

Verify battery condition

Test point: Battery on control board
Expected: Battery functional

2 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

Real time clock valid RAM bit erroneous

Real time clock reported an erroneous Valid RAM and time bit during initialization.

Ranked causes

1. Battery failure or RTC chip malfunction (common)

First check

Power cycle the unit

Test point: Power switch
Expected: RTC valid bit correct without error 119

3 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

Recent error data CRC invalid at powerup

Recent error data kept in battery backed RAM has invalid CRC at powerup.

Ranked causes

1. Battery failure or control board fault (common)

First check

Monitor system status

Test point: Battery backed RAM
Expected: No CRC errors in error data

2 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

Remove generator cover caution

Cover removal requires turning off and unplugging generator, removing three M4×.7×8 screws, sliding cover toward rear, lifting slightly at catch point, then continuing to rear.

Ranked causes

1. Access to internal components required (unknown)

First check

Turn off generator

Test point: Power switch
Expected: Generator powered off

12 more checks with pass and fail actions, 2 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Replace battery (battery-backed RAM)

Battery replacement involves removing control board, then removing spent battery and installing new 3 V button cell with positive side visible, then reinstalling board and recalibrating.

Ranked causes

1. Battery depleted or failed; calibration data lost (unknown)

First check

Remove cover and control board per control board removal procedure

Test point: Control board removed from chassis
Expected: Control board removed and accessible

5 more checks with pass and fail actions, 1 corrective action, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Replace control board high voltage

Control board requires replacement; procedure involves removing cover, disconnecting display board ribbon cable, removing three screws and brackets, then sliding board up to disconnect.

Ranked causes

1. Control board failure or damage (unknown)

First check

Turn off generator and disconnect power cord

Test point: Power source
Expected: Generator powered off and disconnected

19 more checks with pass and fail actions, 2 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Replace HV power supply board high voltage

HV power supply board requires replacement; procedure involves removing cover, heat sink bracket, four cables, three screws, then lifting board out of chassis.

Ranked causes

1. HV power supply board failure or damage (unknown)

First check

Turn off generator and disconnect power cord from wall receptacle

Test point: Power source
Expected: Generator powered off and disconnected

20 more checks with pass and fail actions, 2 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Seal parameters invalid on powerup

SEAL parameters in both BATRAM and RTC are bad at power up. Parameters loaded from defaults.

Ranked causes

1. Battery failure or control board fault (common)

First check

Verify SEAL parameters loaded from defaults

Test point: Unit SEAL parameters
Expected: SEAL parameters at default values without error 133

2 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

ST Microelectronics RAM failed initialization

ST Microelectronics external RAM failed test during initialization.

Ranked causes

1. RAM chip failure or control board fault (common)

First check

Power cycle the unit

Test point: Power switch
Expected: RAM passes test without error 102

2 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

Statistical data CRC invalid at powerup

Statistical data kept in battery backed RAM has invalid CRC at powerup.

Ranked causes

1. Battery failure or control board fault (common)

First check

Monitor system status

Test point: Battery backed RAM
Expected: No CRC errors in statistical data

2 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

More symptoms

Tone average off reading deviation
Tone average reading deviation at calibration

2 more symptoms with ranked causes and checks are in ServiceForge. Connect ServiceForge to your AI

Error codes

Code	Meaning	Trigger	Severity
`001`	FB_UNREPORTABLE_ERROR	Master processor detects error and directs feedback to system error state	critical
`003`	MASTER_DPRAM_TEST_TIMEOUT	Master failed to complete DPRAM test in allotted time	critical
`004`	MASTER_CAL_DATA_TIMEOUT	Master failed to place calibration data in DPRAM in allotted time	critical
`005`	FB_CAL_CHECK_TIMEOUT	Feedback failed to check calibration data in DPRAM in allotted time	critical
`006`	AD_CONVERSION_TIMEOUT	Master side A to D conversion failed to complete in allotted time	critical
`007`	FB_AD_CONVERSION_TIMEOUT	Feedback side A to D conversion failed to complete in allotted time	critical
`008`	MASTER_SETTINGS_TIMEOUT	Master failed to write settings into DPRAM within allotted time for feedback microprocessor	critical
`009`	POST_COMPLETE_TIMEOUT	Master failed to signal initialization complete within allotted time	critical
`010`	INVALID_ERROR_CODE_ALARM	Invalid error code sent to error handler	warning
`011`	FB_POST_ERRORS	Errors detected in feedback microprocessor during power on self test (POST)	critical
`012`	FB_INTERNAL_MEMORY_FAULT	Main state variable for feedback microprocessor corrupted to impossible value	critical
`013`	FB_CORRUPTED_STATE_VAR	Main feedback state variable changed to sys_err incorrectly	critical
`014`	INVALID_BIP_OPS	Invalid value in available operations variable read from smart connector table	error
`015`	INVALID_VS_OPS	Invalid value in available operations variable read from smart connector table	error
`016`	FB_ILLEGAL_STATE_TRANSITION	Combination of new state requested by master and current feedback microprocessor state represents illegal transition	error
`017`	FB_ILLEGAL_STATE_VALUE	Illegal state value detected in feedback state transition checking function	error
`018`	FB_ILLEGAL_POWER_DEACTIVATION_STATE_VALUE	Illegal state value detected in feedback power deactivation state machine state variable	error
`019`	FB_INVALID_MODE_CHANGE	Attempt made to transition directly from one RF output mode to another without first disabling RF from master	error
`020`	FB_INVALID_POWER_CHANGE	Attempt made to change power output while SEAL output was activated	error
`021`	FB_INVALID_MODE_COMMAND	RF output mode (function) sent from master to feedback was invalid	error
`022`	FB_INVALID_CAL_DATA	Calibration data copied from DPRAM to local RAM has invalid CRC and is unusable	error
`023`	FB_INVALID_FEEDBACK_MODE	Invalid feedback mode state variable value	error
`024`	MASTER_FPANEL_TEST_TIMEOUT	Master failed to signal feedback that front panel testing completed in time	critical
`025`	Feedback enable_output_relays detected illegal combination of generator mode and RF output side for output relay configuration.	Invalid output relay configuration during initialization.	error
`026`	Overvoltage condition discovered during current sensor (Isns) calibration.	Excessive voltage detected on Isns line during calibration.	error
`027`	Overcurrent condition discovered during voltage sensor (Vsns) calibration.	Excessive current detected during Vsns calibration.	error
`100`	Bad error code supplied by powerup self test routine on the master side.	Self-test routine failure during initialization.	error
`101`	Master unable to reset feedback microprocessor at initialization.	Feedback microprocessor reset command failed.	error
`102`	ST Microelectronics external RAM failed test during initialization.	RAM memory test failure during powerup.	error
`103`	DPRAM failed test during initialization.	Dual port RAM memory test failure.	error
`104`	CRC test of ST Microelectronics Flash Memory failed during initialization.	Flash memory corruption detected.	error
`105`	Calibration data invalid at powerup and could not be recovered.	Missing or corrupted calibration parameters at startup.	error
`105`	Battery has been replaced	Appears after CPU battery replacement when generator is powered on	info
`106`	Battery backed RAM CRC test failed but data restored from RTC data.	CRC error in battery-backed memory during powerup.	warning
`107`	Battery backed RAM CRC test failed during initialization and correction attempt failed.	CRC error in battery-backed memory that could not be corrected.	error
`108`	Real time clock RAM CRC test failed but data restored from battery backed RAM.	CRC error in RTC memory during powerup.	warning
`109`	Real time clock RAM CRC test failed and correction attempt failed.	CRC error in RTC memory that could not be corrected.	error
`110`	Recent error data in battery backed RAM has invalid CRC at powerup.	CRC error in error history memory.	warning
`111`	Error counts in battery backed RAM have invalid CRC at powerup.	CRC error in error count memory.	warning
`112`	Last power settings in battery backed RAM have invalid CRC at powerup.	CRC error in power settings memory.	warning
`113`	Statistical data in battery backed RAM has invalid CRC at powerup.	CRC error in statistical data memory.	warning
`114`	Minutes on data in battery backed RAM has invalid CRC at powerup.	CRC error in usage time data memory.	warning
`115`	Master microprocessor reported a powerup DOSERR test failure.	DOSERR circuit test failure during initialization.	error
`116`	Doserror test state variable corrupted during powerup dose error test.	Memory corruption during DOSERR test.	error
`117`	Incompatible software versions between processors or master software incompatible with digital board type.	Software version mismatch detected at powerup.	error
`118`	Master and feedback processors fail to communicate on power up.	DPRAM communication failure between processors.	error
`119`	Real time clock reported erroneous Valid RAM and time bit during initialization.	RTC VRT bit indicates invalid RAM or time.	error
`120`	VS footswitch MACRO (cut) keying signal activated during powerup key test.	Footswitch pressed or stuck during initialization.	warning
`121`	VS footswitch COAG keying signal activated during powerup key test.	Footswitch pressed or stuck during initialization.	warning
`122`	BIP footswitch MACRO keying signal activated during powerup key test.	Footswitch pressed or stuck during initialization.	warning
`123`	BIP footswitch COAG keying signal activated during powerup key test.	Footswitch pressed or stuck during initialization.	warning
`124`	VS footswitch SEAL keying signal activated during powerup key test.	Footswitch pressed or stuck during initialization.	warning
`125`	VS handswitch MACRO/SEAL keying signal activated during powerup key test.	Handswitch pressed or stuck during initialization.	warning
`126`	Memory button appeared pressed during powerup key test.	Memory button activation detected during initialization.	warning
`127`	Seal power increment button appeared pressed during powerup.	Button activation detected during initialization.	warning
`128`	Seal power decrement button appeared pressed during powerup.	Button activation detected during initialization.	warning
`129`	Macrobipolar power increment button appeared pressed during powerup.	Button activation detected during initialization.	warning
`130`	Macrobipolar power decrement button appeared pressed during powerup.	Button activation detected during initialization.	warning
`131`	Bipolar power increment button appeared pressed during powerup.	Button activation detected during initialization.	warning
`132`	Bipolar power decrement button appeared pressed during powerup.	Button activation detected during initialization.	warning
`133`	SEAL parameters in both BATRAM and RTC are bad at power up.	Missing or corrupted SEAL device parameters.	warning
`134`	Master processor detected an A/D conversion error during powerup.	Analog-to-digital converter test failure.	error
`140`	Feedback processor detected an error in external memory during powerup.	External RAM test failure.	error
`141`	Feedback processor detected an error in dual port RAM during powerup.	DPRAM test failure.	error
`142`	Feedback processor detected an error in program memory during powerup.	Flash memory ROM CRC failure.	error
`143`	Feedback processor detected corrupted calibration data during powerup.	Calibration data CRC failure.	error
`144`	Feedback processor detected corrupted memory during dose error circuit test at powerup.	Memory corruption detected by DOSERR test.	error
`145`	Powerup test of DOSERR circuitry failed. Failure detected by feedback processor.	DOSERR circuit test failure.	error
`146`	Feedback processor detected an A/D conversion error during power up.	Analog-to-digital converter test failure.	error
`162`	Feedback calculation of starting ECON overflowed.	ECON parameter calculation overflow.	error
`163`	Master error disable variables are equal when they should be inverse.	Memory corruption of error control variables.	error
`164`	Feedback calculation of power overflowed.	Power calculation overflow during operation.	error
`165`	Master calculation of power overflowed.	Power calculation overflow in master processor.	error
`166`	Sys_Econ and HV_SNS do not compare within limits during keying.	ECON and HV sensor mismatch during RF output.	error
`167`	ton_avg reading is too different from calibrated ton_avg value.	Tone average deviation from calibration baseline.	error
`168`	ton_avg reading when no RF output is too different from calibrated off value.	Tone average off-state deviation from baseline.	error
`169`	Feedback error disable variables are equal when they should be inverse.	Memory corruption of feedback error control variables.	error
`170`	Bipolar MACRO or COAG key press resulted in COMPLETE_FAIL outcome from feedback processor.	RF output key press resulted in complete failure.	critical
`172`	5 volt low voltage power supply analog input exceeded 2.5 volts	EXCESSIVE_SYSTEM_VOLTAGE detected	error
`174`	Invalid mode value in last_settings.curr_mode variable	INVALID_LAST_MODE_VALUE detected by record_keying_event function	error
`175`	Data mismatch in feedback microprocessor communication	FB_RENDEZVOUS_INVALID_ECHO - echoed data does not match original	error
`176`	Feedback microprocessor failed to respond in time	FB_RENDEZVOUS_TIMEOUT - settings rendezvous flag not answered	error
`177`	Generator state machine in illegal RECOVERABLE_ERROR state	MNS_ILLEGAL_STATE_VALUE detected in manage_normal_state	error
`178`	Generator state machine has undefined state value	MNS_INVALID_STATE_VALUE detected in manage_normal_state routine	error
`179`	Generator state machine in illegal state for current context	MRE_INVALID_STATE_VALUE - next_generator_state is illegal	error
`180`	ISO hardware isolation test failure, key input detected during test	ISO_TEST_FAILURE - key read as down during ISO test in progress	error
`181`	Invalid debounce state value in key input processing	INVALID_KEY_STATE_VALUE detected by process_key_input function	error
`182`	Invalid overall key state value in input processing	INVALID_OVERALL_KEY_STATE detected by process_key_inputs	error
`183`	Invalid button debounce state in simple button processing	PSB_INVALID_BUTTON_STATE detected by process_simple_button	error
`184`	Invalid button debounce state in auto-repeat button processing	PARB_INVALID_BUTTON_STATE detected by process_auto_repeat_button	error
`185`	Invalid button debounce state in overall button input processing	PBI_INVALID_BUTTON_STATE detected by process_button_inputs	error
`186`	Memory corruption detected in button input state variables	PBI_INTERNAL_MEMORY_FAULT - inconsistent button state values	critical
`187`	Invalid value in key_down variable during mode matching	VKI_INVALID_MODE_DOWN detected by key_capability_match function	error
`188`	Invalid key state value in key input validation	VKI_INVALID_KEY_STATE_VALUE detected by validate_key_inputs	error
`189`	Invalid or corrupted key value in key_down variable	VKI_INVALID_KEY_DOWN detected by validate_key_inputs function	error
`190`	Invalid or corrupted button identifier in button results processing	MBR_INVALID_BUTTON_DOWN detected by manage_button_results	error
`191`	Power settings corrupted or macro/bipolar power exceeds 95 watts	MBR_POWER_SETTINGS_CORRUPTED detected by manage_button_results	error
`192`	Invalid audio state value in audio management	MA_INVALID_AUDIO_STATE detected by manage_audio function	error
`193`	Invalid mode value in audio management	MA_INVALID_MODE_VALUE in curr_settings.curr_mode detected	error
`194`	Invalid mode value in audio tone selection	SAT_INVALID_MODE_VALUE in curr_settings.curr_mode detected	error
`195`	Invalid alert type value in audio alert transition	MA_AT_INVALID_ALERT_TYPE detected in alert type variable	error
`196`	Calibration data corrupted in dual port RAM	CCD_CAL_DATA_CORRUPTED - invalid CRC in dpram cal store	error
`197`	Invalid generator state value in main function	MAIN_INVALID_STATE_VALUE detected in current_generator_state	error
`198`	Invalid serial message type in result execution	SNESR_INVALID_MESSAGE_TYPE in pending_serial_cmd.type field	error
`199`	Invalid LED mask parameter passed to LED update function	USL_INVALID_LED_MASK detected by update_smart_leds	error
`214`	Feedback failed to complete DPRAM test within allotted time	FB_INIT_ERRORS_TIMEOUT - initialization test timeout	error
`215`	Master main loop delay timer failed to expire	MM_MAIN_LOOP_DELAY_TIMEOUT - timer expiration failure	error
`216`	Feedback main loop delay timer failed to expire	FB_MAIN_LOOP_DELAY_TIMEOUT - feedback timer expiration failure	error
`217`	Invalid seal power watts value requested for display	MM_DSP_INVALID_SEAL_POWER - invalid watts value parameter	error
`218`	Master timed out waiting for feedback model data signal	FB_MODEL_DATA_TIMEOUT - DPRAM signal from feedback timeout	error
`219`	Front panel test sequence did not complete as scheduled	FPANEL_TEST_TIMEOUT - lamps, LEDs, displays, tones test timeout	error
`220`	Generator state machine in illegal RECOVERABLE_ERROR state	MCS_ILLEGAL_STATE_VALUE - next_generator_state is illegal	error
`221`	Invalid undefined state value in calibration state machine	MCS_INVALID_STATE_VALUE detected in manage_calibration_state	error
`222`	Invalid or undefined calibration step state value	MCS_ILLEGAL_CAL_STATE_VALUE in manage_calibration_state routine	error
`223`	Calibration state machine in illegal state	CAL_ILLEGAL_STATE_VALUE - undefined calibration state detected	error
`224`	Invalid key_down variable value in key capability matching	KCM_INVALID_KEY_DOWN - key_capability_match called with invalid value	error
`225`	Excessive idle reading on current or voltage sensor with no RF active	DOSRR_EXCESS_IDLE_READING - more than half scale with no keying	error
`226`	System economy over 90% full scale with low voltage/current readings	DOSRR_ECON_RISING - sys_econ > 90%, V_sns and I_sns < 10%	error
`227`	Power difference between master and feedback sensors exceeds 50 watts	DOSRR_EXCESS_DIFFERENCE - power computation mismatch	error
`229`	Master side current sensor is saturated	DOSRR_CURRENT_SATURATION - current measurement at saturation	error
`230`	Master side voltage sensor is saturated	DOSRR_VOLTAGE_SATURATION - voltage measurement at saturation	error
`231`	Master and feedback computed desired values differ	DOSRR_DESIRED_VAL - value computation mismatch between processors	error
`232`	Power on master side exceeds IEC 60601-2-2 excess power limit	DOSRR_POWER_EXCEEDED - computed power > limit specified by standard	error
`233`	Seal deviation calibration data is corrupted or invalid	CCD_SEAL_DEV_DATA_CORRUPTED - invalid data in curr_seal_dev in dpram	error
`234`	Feedback detected illegal power activation state value	FB_INVALID_POWER_ACTIVATION_STATE_VALUE - illegal state in variable	error
`451`	Temperature has risen past the allowable range	Over Temperature Error - thermal limit exceeded	error

Likely causes and actions for each code are in ServiceForge. Connect ServiceForge to your AI

Community

0 fixes logged by technicians through their AI, with outcomes, for this model.

ServiceForge knowledge base record. Field-unverified unless technicians confirmed it. A teaching summary of the record, not a service manual. Export 2026-10-14.