Electrosurgical generators

Olympus ESG-400: troubleshooting and error codes

The ServiceForge knowledge base holds 40 documented symptoms for the Olympus ESG-400, with 104 ranked causes, 68 diagnostic checks with test points and expected values, and 137 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 to footswitch or handswitch activation high voltage

Footswitch or handswitch input does not activate generator output

Ranked causes

1. Improper footswitch or HF instrument connection (common)
2. Damaged footswitch, handswitch or connection cable (occasional)
3. Wrong switch pedal or button pressed (common)
4. Generator not switched on (common)
5. Another switch pedal or button is pressed (occasional)
6. Output activated by peripheral equipment (occasional)
7. Window displayed on touch-screen (common)
8. Incorrect screen displayed (occasional)
9. Output mode deactivated or power level set to off (common)
10. Generator malfunction (rare)

First check

Verify connections

Test point: Footswitch sockets and output socket on rear panel
Expected: Footswitch and HF instrument properly seated

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

Electrosurgical generator does not respond to footswitch or handswitch activation high voltage

Footswitch or handswitch does not activate output when pressed

Ranked causes

1. Improper connection of footswitch or HF instrument to output socket (common)
2. Footswitch, handswitch or connection cable is damaged (occasional)
3. Incorrect footswitch pedal or handswitch button is pressed (common)
4. Electrosurgical generator is not switched on (common)
5. Another footswitch pedal or handswitch button is already pressed (occasional)
6. Output is activated by peripheral equipment (occasional)
7. Window is displayed on touch-screen (occasional)
8. Output mode deactivated or power level set to off (occasional)
9. Malfunction of the electrosurgical generator (rare)

First check

Verify electrosurgical generator is powered on

Test point: Power switch and display/indicators
Expected: Unit is on; display shows normal screen

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

Automatic mist and smoke evacuation does not work caution

Automatic mist and smoke evacuation system with compatible insufflation unit is not functioning

Ranked causes

1. Erroneous settings (common)
2. Communication cable not connected (common)
3. Erroneous communication cable connection (occasional)
4. Insufflation unit malfunction (occasional)

First check

Verify insufflation unit settings

Test point: High flow insufflation unit configuration
Expected: Correct settings for automatic evacuation

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

Automatic mist and smoke evacuation system does not work caution

Automatic mist and smoke evacuation function not operating with compatible high flow insufflation unit

Ranked causes

1. Erroneous settings (common)
2. Communication cable not connected (common)
3. Communication cable connection erroneous (occasional)
4. Compatible high flow insufflation unit malfunction (rare)

First check

Verify insufflation unit settings

Test point: High flow insufflation unit configuration
Expected: Settings match generator mist/smoke evacuation configuration

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

Electrosurgical generator does not respond after pressing power switch high voltage

Unit does not respond when power switch is activated

Ranked causes

1. Improper connection of power cord to AC socket or grounded wall outlet (common)
2. Grounded wall outlet has wrong or no output voltage (common)
3. Power cord is damaged (occasional)
4. Malfunction of the electrosurgical generator (rare)

First check

Verify power cord connection

Test point: AC power socket on rear panel and wall outlet
Expected: Power cord firmly connected at both ends

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

Generator does not respond after pressing power switch high voltage

No response when power switch is activated on electrosurgical generator ESG-400

Ranked causes

1. Improper power cord connection (common)
2. Wrong or no output voltage at wall outlet (common)
3. Damaged power cord (occasional)
4. Malfunction of generator (rare)

First check

Verify power cord connection

Test point: AC power socket on rear panel, grounded wall outlet
Expected: Power cord seated firmly in socket

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

HF instrument not recognized on UNIVERSAL socket

Olympus HF instrument connected to UNIVERSAL socket not detected or recognized by generator

Ranked causes

1. Improper HF instrument plug connection to UNIVERSAL socket (common)
2. HF instrument does not support recognition capability (occasional)
3. Damaged HF instrument or connection cable (occasional)
4. Generator malfunction (rare)

First check

Verify HF instrument plug fully inserted

Test point: UNIVERSAL socket connection
Expected: HF instrument plug fully seated in UNIVERSAL socket

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

HF instrument not recognized when connected to UNIVERSAL socket high voltage

Generator does not recognize Olympus HF instrument connected to UNIVERSAL socket

Ranked causes

1. Improper HF instrument plug connection (common)
2. HF instrument lacks recognition capability (occasional)
3. HF instrument or cable damaged (occasional)
4. Generator malfunction (rare)

First check

Verify plug connection

Test point: UNIVERSAL socket and HF instrument plug
Expected: Plug fully inserted and seated

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

No output power in RFCoag mode with end of activation signal high voltage

RFCoag mode produces end of activation signal but no output power is delivered

Ranked causes

1. Electrode has no tissue contact (common)
2. Improper HF instrument plug connection (occasional)
3. Damaged HF instrument connection cable (occasional)
4. Generator malfunction (rare)

First check

Verify electrode contact

Test point: Electrode position on tissue
Expected: Electrode in contact with tissue

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

No output power is delivered with RFCoag mode selected and end-of-activation signal is audible patient safety

Electrosurgical output does not activate when RFCoag mode is selected; end-of-activation tone sounds but no RF power generated

Ranked causes

1. Electrode has no contact with tissue (common)
2. Improper connection of HF instrument plug with output socket (occasional)
3. Damaged HF instrument connection cable (occasional)
4. Malfunction of the electrosurgical generator (rare)

First check

Verify electrode contact with tissue

Test point: Surgical site; electrode position
Expected: Electrode in firm contact with tissue

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

Unit does not respond after power switch pressed high voltage

No response from electrosurgical generator after power switch activation; may include no display or audible feedback

Ranked causes

1. Improper power cord connection (common)
2. Grounded wall outlet wrong or no output voltage (common)
3. Power cord damaged (occasional)
4. Malfunction of electrosurgical generator (rare)

First check

Verify power cord connection

Test point: AC power socket on rear panel, grounded wall outlet
Expected: Power cord fully seated and secure

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

Autostart function does not activate output when electrode touches tissue patient safety

Autostart feature fails to activate RF output when electrode makes contact with tissue; activation sound present but no power delivery

Ranked causes

1. Autostart function assigned to another output socket (common)
2. Long time delay selected for autostart (occasional)
3. Generator malfunction (rare)

First check

Verify autostart function socket assignment

Test point: Autostart assignment in Mode/Set screen
Expected: Autostart assigned to currently used output socket

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

Autostart function does not activate when electrode touches tissue high voltage

Autostart feature fails to trigger generator output when electrode contacts tissue

Ranked causes

1. Autostart assigned to different output socket (occasional)
2. Long time delay selected for autostart (occasional)
3. Generator malfunction (rare)

First check

Verify autostart socket assignment

Test point: Autostart configuration setting
Expected: Autostart assigned to correct output socket

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

Footswitch or handswitch pressed and activation sound audible but no output power delivered patient safety

Activation tone sounds when footswitch/handswitch pressed but no RF energy is generated

Ranked causes

1. Footswitch is assigned to another output socket (occasional)
2. Improper connection of HF instrument plug with output socket (occasional)
3. Malfunction of the electrosurgical generator (rare)

First check

Verify footswitch assignment

Test point: Footswitch socket; Mode and Set screens
Expected: Footswitch assigned to currently active output socket

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

Footswitch or handswitch pressed but no output power delivered high voltage

Activation sound present when footswitch or handswitch button pressed, but no RF power output to electrode or HF instrument

Ranked causes

1. Footswitch assigned to another output socket (common)
2. Improper HF instrument plug connection to output socket (common)
3. Generator malfunction (rare)

First check

Verify footswitch socket assignment

Test point: Footswitch assignment setting in menu
Expected: Footswitch assigned to currently used output socket

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

No output power with audible activation sound and footswitch pressed high voltage

Activation sound plays but no power is delivered when footswitch or handswitch is pressed

Ranked causes

1. Footswitch assigned to different output socket (occasional)
2. Improper HF instrument plug connection (common)
3. Generator malfunction (rare)

First check

Verify footswitch socket assignment

Test point: Footswitch configuration
Expected: Footswitch assigned to correct output socket

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

Output cannot be deactivated patient safety

Generator output remains active and cannot be turned off by releasing switch

Ranked causes

1. Autostart with both electrodes in tissue contact (common)
2. Malfunction of footswitch or handswitch (occasional)
3. Generator malfunction (rare)

First check

Verify electrode contact

Test point: Electrode position on tissue
Expected: Electrodes removed from tissue

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

Output of generator cannot be deactivated patient safety

RF output continues despite releasing footswitch/handswitch; unable to stop power delivery during procedure

Ranked causes

1. Autostart function selected with both electrodes touching tissue (common)
2. Malfunction of footswitch or handswitch (occasional)
3. Generator malfunction (rare)

First check

Check electrode tissue contact status

Test point: Both electrode positions at surgical site
Expected: At least one electrode not in contact with tissue

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

Generator does not react to front panel push button during standby

Push buttons on front panel are not responsive during standby mode

Ranked causes

1. Push button already pressed (common)
2. Generator malfunction (rare)

First check

Check for stuck button

Test point: Front panel push buttons
Expected: All buttons released

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

Generator does not react when push button on front panel pressed during standby

Front panel push buttons not responding during standby mode

Ranked causes

1. Push button already pressed (common)
2. Malfunction of electrosurgical generator (rare)

First check

Check all front panel buttons

Test point: Front panel push buttons
Expected: All buttons released and not stuck

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

No sound is audible during activation patient safety

Electrosurgical generator activates but produces no audible feedback

Ranked causes

1. Volume is set to inaudible level (common)
2. Malfunction of the electrosurgical generator (rare)

First check

Check volume level

Test point: Volume control on rear panel or Menu screen
Expected: Volume set to audible level

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

Touch-screen cannot be controlled

Touch-screen is unresponsive to user input

Ranked causes

2. Touch-screen not properly calibrated (occasional)
3. Touch-screen malfunction (occasional)

First check

Inspect touch-screen surface

Test point: Touch-screen display
Expected: No objects obstructing

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

Volume cannot be adjusted via menu or rear panel

Volume control settings not working when adjusted through software menu or physical rear panel control

Ranked causes

1. Error-related signal volume not adjustable (common)
2. Malfunction of electrosurgical generator (rare)

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

Volume cannot be adjusted via menu or rear panel control

Volume adjustment controls are not responsive

Ranked causes

1. Error-related signal volume is not adjustable (common)
2. Generator malfunction (rare)

First check

Determine signal type

Test point: Audio source during activation
Expected: Regular operation audio or error signal

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

Audio volume adjustment not responding caution

Sound level does not change when adjusted via MENU menu or rear volume control knob, or no acoustic feedback heard

Ranked causes

1. Volume control malfunction (touch screen or rear knob) (unknown)

First check

Volume adjustment via touch screen menu

Test point: MENU push button, rocker switch
Expected: Sound carried according to setting; acoustic feedback heard

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

Calibration: Communication link test

Verify LINK-IN and LINK-OUT communication socket connectivity via communication cable

Ranked causes

1. Communication circuit or cable fault (unknown)

First check

Communication socket connectivity

Test point: LINK-IN and LINK-OUT sockets rear housing
Expected: Communication cable properly seated

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

Calibration: Display brightness and volume

Verify display brightness adjustment and audio output via touch screen menu controls

Ranked causes

1. Display or audio circuit malfunction (unknown)

First check

Display brightness adjustment

Test point: Touch screen menu
Expected: Brightness changes according to rocker switch setting

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

Calibration: Push button functionality

Verify all push buttons respond correctly and perform functions per instruction manual

Ranked causes

1. Push button mechanical or electrical failure (unknown)

First check

Push button response

Test point: All push buttons
Expected: Buttons perform per instruction manual description

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

Calibration: Self test

Generator boot sequence with alarm detection and power-on verification

Ranked causes

1. Power supply or initialization failure (unknown)

First check

Power on and boot

Test point: Power Switch
Expected: Generator boots without alarm

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

Display brightness adjustment not responding caution

Display brightness does not change when adjusted via MENU push button and rocker switch

Ranked causes

1. Display brightness control malfunction (unknown)

First check

Display brightness adjustment

Test point: MENU push button, rocker switch
Expected: Brightness changes according to setting

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

Electrosurgical generator cannot be switched off patient safety

Power switch does not turn off unit; generator continues operating after power switch activation

Ranked causes

1. Malfunction of electrosurgical generator (rare)

First check

Attempt emergency power disconnect

Test point: Power cord plug, AC power socket, wall outlet
Expected: Unit powers off after cord disconnection

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

Generator alarm on power-up

Generator produces an alarm during boot sequence instead of powering on cleanly.

Ranked causes

1. Unknown fault condition triggering alarm during startup (unknown)

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

Generator cannot be switched off patient safety

Power switch does not turn off the electrosurgical generator

Ranked causes

1. Generator malfunction (common)

First check

Emergency power removal

Test point: Power cord plug at AC power socket
Expected: Power cord disconnected

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

Generator does not react to front panel button during activation

Push buttons are unresponsive while generator is in activation mode

Ranked causes

1. Buttons not available during activation (common)

First check

Verify activation status

Test point: Footswitch/hand switch status
Expected: Switch released and activation stopped

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

Generator does not react when button on front panel pressed during activation patient safety

Front panel buttons not responding during activation/operation mode

Ranked causes

1. Buttons not available during activation (common)

First check

Deactivate current operation

Test point: Footswitch or hand switch control
Expected: Footswitch/hand switch released, activation stopped

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

Push button functionality check caution

One or more push buttons do not respond to pressing or do not perform their intended function as described in instruction for use

Ranked causes

1. Push button mechanical or electrical failure (unknown)

First check

Push button response to press

Test point: All push buttons on unit
Expected: Each button performs according to instruction for use

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

Touch-screen remains dark after power on

Display dark after switching on unit; audible sound indicates partial power but no display output

Ranked causes

1. Malfunction of touch-screen (unknown)

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

Touch-screen remains dark after power-on with audible sound

Touch-screen display is off but system produces sound when powered on

Ranked causes

1. Touch-screen malfunction (common)

First check

Verify system powers on

Test point: Audio output
Expected: Audible sound present

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

Touch-screen remains dark after switching on (sound is audible)

Display does not illuminate but unit powers up and produces sound

Ranked causes

1. Malfunction of the touch-screen (common)

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

Unit does not boot without alarm patient safety

Generator fails to start cleanly or triggers alarm during power-on self-test after connecting power cord and pressing Power Switch

Ranked causes

1. Unspecified fault detected during self-test (unknown)

First check

Self-test on power-up

Test point: Power Switch
Expected: Unit boots without alarm

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

Error codes

Code	Meaning	Trigger	Severity
`E001`	Open circuit detected	Electrodes of the HF instrument have no proper tissue contact	error
`E002`	Short circuit detected	Electrodes of the HF instrument touch each other	error
`E003`	Docking Connector Error	Docking connector malfunction	error
`E004`	Internal software error	Software malfunction detected during operation	critical
`E004`	Error	Internal software malfunction	critical
`E006`	Non-conductive fluid	Use of non-conductive fluid during bipolar resection or electrode in air environment	error
`E012`	Adjustment incomplete	Device adjustment is missing or incomplete	warning
`E016`	Burn-in incomplete	Device burn-in is missing or incomplete	warning
`E017`	Error	Wrong or broken footswitch or damaged hardware	error
`E017`	Footswitch error	Footswitch malfunction or connection problem detected	error
`E019`	Footswitch combination	Two single pedal or two double pedal footswitches connected	error
`E023`	Invalid serial number	Wrong or missing device serial number	error
`E031`	Error	Wrong docking connector coding signal or broken hardware	error
`E031`	Docking connector coding error	Wrong docking connector coding signal detected	error
`E032`	Docking connector coding error	Wrong docking connector coding signal detected	error
`E038`	Error	Internal hardware error	error
`E038`	Internal hardware error	Hardware malfunction detected	critical
`E045`	Communication error	Communication error with USG-400 or other connected devices	error
`E045`	Error	Communication error with USG-400 or other devices	error
`E048`	Communication error with restart	Communication error with USG-400 or other devices during operation	error
`E049`	Communication error	Communication error with USG-400 or other devices	error
`E052`	Communication error with restart	Communication error during operation	error
`E053`	Communication error	Communication with USG-400 or other devices lost	error
`E054`	Communication error with software update option	Communication error detected	error
`E055`	Communication error	Communication with USG-400 or other devices lost	error
`E056`	Communication error with restart	Communication error during operation	error
`E057`	Communication error with restart option	Communication failure detected	error
`E058`	Error	Internal software or hardware error	error
`E060`	Internal software or hardware error	Internal fault detected	critical
`E099`	Error	Internal hardware error	error
`E100`	Error	Spark Monitor communication error	error
`E103`	Push button pressed during power-up	Push button on front panel held during power-on	warning
`E104`	Footswitch Cut Pedal pressed during power-up	Cut Pedal on Footswitch 1 held during power-on	warning
`E105`	Footswitch Coag Pedal pressed during power-up	Coag Pedal on Footswitch 1 held during power-on	warning
`E106`	Footswitch Cut Pedal pressed during power-up	Cut Pedal on Footswitch 2 held during power-on	warning
`E107`	Footswitch Coag Pedal pressed during power-up	Coag Pedal on Footswitch 2 held during power-on	warning
`E108`	Handswitch pressed	Pressed Cut Handswitch at Monopolar 1 socket detected during power-up	warning
`E109`	Handswitch pressed	Pressed Coag Handswitch at Monopolar 1 socket detected during power-up	warning
`E110`	Handswitch pressed	Pressed Cut Handswitch at Monopolar 2 socket detected during power-up	warning
`E111`	Handswitch pressed	Pressed Coag Handswitch at Monopolar 2 socket detected during power-up	warning
`E112`	Cut Handswitch pressed during power-up	Cut Handswitch at Multifunction socket held during power-on	error
`E113`	Coag Handswitch pressed during power-up	Coag Handswitch at Multifunction socket held during power-on	error
`E114`	Touch-screen touched during power-up	Display screen touched during power-on	warning
`E115`	Application time limit exceeded	Maximum application time has been exceeded during operation	warning
`E131`	Unknown instrument	Olympus HF instrument not properly connected to UNIVERSAL socket or invalid default mode	error
`E132`	Internal hardware error	Hardware malfunction detected	critical
`E133`	Internal hardware error	Hardware malfunction detected	critical
`E134`	Internal hardware error	Hardware malfunction detected	critical
`E135`	Single pedal footswitch not assigned	Footswitch assignment missing during configuration	warning
`E136`	Double pedal footswitch not assigned	Footswitch assignment missing during configuration	warning
`E137`	Auto Start feature incorrectly assigned	Auto Start feature configuration error detected	warning
`E137`	Error	Auto Start feature is not assigned correctly	warning
`E138`	Invalid Thunder Beat mode setting	Thunder Beat mode configuration error detected	error
`E138`	Error	Invalid Thunder Beat mode setting detected	warning
`E139`	Invalid Thunder Beat seal mode setting	Thunder Beat seal mode configuration error detected	error
`E139`	Error	Invalid Thunder Beat seal mode setting detected	warning
`E140`	No mode selected	Mode not selected while attempting to activate	warning
`E141`	Power level set to zero	Activation attempted with zero power level	warning
`E147`	Unknown instrument	HF instrument not properly connected or cannot be identified	error
`E148`	Unknown instrument	HF instrument not properly connected or short circuit at socket	error
`E149`	Unknown instrument	HF instrument not properly connected or malfunction at socket	error
`E151`	Unknown instrument	HF instrument not properly connected or invalid power setting	error
`E152`	Unknown instrument	HF instrument not properly connected or invalid effect setting	error
`E153`	Unknown instrument	HF instrument not properly connected or invalid Cut Mode	error
`E154`	Unknown instrument	HF instrument not properly connected or invalid Coag Mode	error
`E159`	Unknown instrument	HF instrument not properly connected or invalid Mode detected	error
`E166`	Unknown instrument	HF instrument not properly connected or invalid version number	error
`E167`	Unknown instrument	HF instrument not properly connected or internal software error	critical
`E179`	Temperature below limit	Generator Board temperature is too low	unknown
`E180`	Temperature above limit	Generator Board temperature is too high	unknown
`E181`	Temperature below limit	HVPS Board temperature is too low	unknown
`E182`	Temperature above limit	HVPS Board temperature is too high	unknown
`E186`	Error	Internal hardware malfunction	critical
`E186`	Internal hardware error	Hardware malfunction detected	critical
`E187`	Increased HF leakage current	High frequency leakage current exceeded 150 mA (monopolar) or 100 mA (bipolar)	error
`E188`	Excessive HF leakage current	High frequency leakage current exceeded 300 mA (monopolar) or 200 mA (bipolar)	error
`E202`	Insufficient neutral electrode contact	Neutral electrode contact resistance too high or not connected	unknown
`E214`	Low battery	Motherboard battery voltage low causing data loss	error
`E220`	Error	Internal software or hardware malfunction	critical
`E295`	Error	Unable to read data from Multifunction socket	error
`E296`	Error	Unable to write data to Multifunction socket	error
`E297`	Error	Unable to read instrument name from Multifunction socket	error
`E390`	Communication error	Improper connection of communication cables to LINK-OUT/LINK-IN socket	error
`E394`	Communication error	Ring connection detected in communication cables to LINK-OUT/LINK-IN socket	error
`E396`	Temperature below limit	Generator Board temperature too low	unknown
`E397`	Temperature above limit	Generator Board temperature too high	unknown
`E398`	Temperature below limit	HVPS Board temperature too low	unknown
`E399`	Temperature above limit	HVPS Board temperature too high	unknown
`E409`	Communication error	Communication problem detected in cables to LINK-OUT/LINK-IN socket	error
`E410`	Error	Refer to E058	error
`E411`	Communication error	Communication problem detected in cables to LINK-OUT/LINK-IN socket	error
`E412`	Error	Refer to E058	error
`E413`	Error	Controlled output power at Burn-In is below limit	warning
`E414`	Error	Controlled output power at Burn-In is above limit	error
`E415`	Error	Refer to E004	error
`E416`	Error	Refer to E004	error
`E417`	Error	Refer to E004	error
`E430`	Error	Power failure detected	critical
`E430`	Power fail	Power failure event	critical
`E431`	Error	Refer to E004	error
`E432`	Error	Internal hardware error	error
`E433`	Error	Internal hardware error	error
`E438`	Procedure data error	One or more saved procedures have been deleted; inconsistent procedure data detected	error
`E439`	Error	Internal hardware error	error
`E440`	Error	Internal hardware error	error
`E441`	Device setting error	All settings reset to default due to SRAM and EEPROM initialization	warning
`E457`	Error	Internal software or hardware malfunction	critical
`E458`	Error	Refer to E058	error
`E459`	Error	Refer to E133	error
`E460`	Error	Refer to E133	error
`E486`	No instrument connected	Olympus HF instrument not properly connected to UNIVERSAL socket	error
`E490`	Communication error	Communication problem detected in cables to LINK-OUT/LINK-IN socket	error
`E504`	Error	Refer to E058	error
`E515`	Communication error	Communication problem detected in cables to LINK-OUT/LINK-IN socket	error
`E516`	Communication error	Communication problem detected in cables to LINK-OUT/LINK-IN socket	error
`E525`	Error	Refer to E020	error
`E526`	Error	Refer to E020	error
`E539`	Error	Refer to E058	error
`E540`	Error	Refer to E058	error
`E558`	Error	Refer to E058	error
`E560`	Error	Refer to E058	error
`E561`	Error	Refer to E058	error
`E562`	Error	Refer to E058	error
`E617`	Excess coagulum on tip	Tissue built up on instrument tip causing sparking	unknown
`E619`	Data transfer	Device activated during instrument recognition data transfer	unknown
`E646`	Mains voltage drop	Mains voltage too low	unknown
`E650`	Error	Refer to E058 or instrument malfunction	error
`E651`	Error	Refer to E058 or internal hardware error	error
`E652`	Error	Internal software error	error
`E653`	Error	Internal software error	error
`E657`	Short circuit	Electrodes of HF instrument may touch each other	unknown
`E658`	Short circuit	Loop electrode may contact other instruments or metal parts	unknown
`E659`	Error	Internal software error	error
`E661`	Short circuit	Electrodes may touch each other or instrument tip contacts grasper	unknown
`E665`	Application time limit exceeded	Cut and coagulation switches pressed simultaneously	unknown
`E672`	Error	Internal software or hardware error	error
`E673`	Error	Internal software or hardware error	error

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

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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.