Laser systems · VersaPulse family

Lumenis VersaPulse Select II: troubleshooting and error codes

The ServiceForge knowledge base holds 45 documented symptoms for the Lumenis VersaPulse Select II, with 99 ranked causes, 113 diagnostic checks with test points and expected values, and 138 error codes. Each symptom below shows its causes and the first check; the rest is one connection away. Connect ServiceForge to your AI

Symptoms

System overheating fault displayed caution

Overheating fault message appears on LCD screen during operation

Ranked causes

1. Coolant level low or improper (common)
2. Fan speed controller improperly adjusted (common)
3. Water particle filter dirty or discolored (common)
4. Air filter restricted or dirty (common)
5. Inadequate airflow around system (occasional)
6. Ambient temperature above 22.5°C (occasional)
7. Water temperature calibration incorrect (occasional)
8. Water hoses bent, kinked, or damaged (occasional)
9. Lamp calibration values too high (occasional)
10. Water pump head worn or flow restriction present (rare)

First check

Verify coolant level in upper water reservoir

Test point: Upper water reservoir
Expected: Between one-half and full

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

System blowing blastshields patient safety

Frequent replacement of blastshield optic during operation; fiber endface explodes during use

Ranked causes

1. Blastshield optic contaminated or damaged (common)
2. Fiber optical alignment incorrect (common)
3. Fiber previously used, autoclaved, or worn beyond lifetime (common)
4. Fiber SMA end damaged or contaminated (common)
5. Blastshield glass fingerprint or prior contamination (occasional)
6. Laser optical alignment not centered or peaked (occasional)
7. Fiber focus lens contaminated or damaged (occasional)

First check

Visually inspect blastshield optic

Test point: Blastshield optic surface
Expected: Clean, no contamination or visible damage

5 more checks with pass and fail actions, 7 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

System does not start or shuts off during operation high voltage

Low voltage power supply failure or loss of coolant flow prevents system operation; may display OVERHEATING on LCD

Ranked causes

1. Blown F1 or F2 line fuse (common)
2. Blown F3 fuse (common)
3. Open T1 thermal switch (occasional)
4. Front door opened (interlock switch) (common)
5. Loss of coolant flow (SW3) (occasional)
6. Loss of facility power (common)

First check

Verify facility 220 VAC supply voltage present

Test point: T1 secondary
Expected: 220 VAC

4 more checks with pass and fail actions are in ServiceForge. Connect ServiceForge to your AI

Access interior components high voltage

Technician needs to access laser head, optics bench, cooling system, fuses, HVPS, and circuit breaker for service and maintenance

Ranked causes

1. Service access required to front door and internal PCBs (common)
2. Service access required to laser head and top cover (common)
3. Service access required to optics bench (occasional)
4. Service access required to right side cover (common)
5. Service access required to left side cover (common)

First check

Verify front door opens properly

Test point: Bottom left hole on front cover
Expected: Door swings open to right when tab released

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

Fiber endface explosion radiation

Fiber endface explodes during operation, causing system to blow blastshields; violent reaction ejects sparks and hot gases from fiber

Ranked causes

1. Fiber previously used or autoclaved, lifetime exceeded (common)
2. Fiber SMA end damaged or contaminated (common)
3. Blastshield contamination scattering laser energy (common)
4. Laser optical alignment off-center or not peaked (occasional)
5. Fiber focus lens contamination scattering laser energy (occasional)

First check

Verify fiber service history and condition

Test point: Fiber age and sterilization records
Expected: New fiber; not previously used or autoclaved

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

System shutdown after turn-on high voltage

System de-energizes main contactor and shuts down after successfully turning on

Ranked causes

1. Interlock loop break (no circuit breaker trip) (common)
2. Thermal switch in isolation transformer open (occasional)
3. Waterflow switch S3 open or defective (occasional)
4. Fuse F3 open (occasional)
5. Circuit breaker tripping during shutdown (occasional)

First check

Consult Interlock schematic to identify break in 24 VAC contactor loop

Test point: Interlock schematic (Section 8)
Expected: Open point identified in thermal switch, waterflow switch, door interlock, K2, K1, or F3

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

Cavity alignment verification and optimization high voltage

Determine if Ho/Nd:YAG cavity optics (HR, OC mirrors) are properly aligned for maximum power output by visual inspection and burn pattern analysis on paper target.

Ranked causes

1. HR or OC mirror misalignment in X-axis (unknown)
2. HR or OC mirror misalignment in both X and Y axes (unknown)
3. Damaged HR, OC, or Relay mirrors (rare)
4. Damaged rod or failed flash lamp (rare)

First check

Visual inspection of optics for damage

Test point: HR, OC, and Relay mirrors
Expected: No visual sign of damage

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

Service attenuator not inserted into beam path high voltage

Attenuator fails to move into position when SW1 is activated; 'ATTEN IN BEAM' message does not appear on LCD display

Ranked causes

1. SW1 switch on Shutter PCB not making contact or open (common)
2. 24 VDC supply failure to solenoid (common)
3. Solenoid coil malfunction or mechanical jam (occasional)
4. Slotted optical switch LPT1 blocked or misaligned (occasional)

First check

Verify SW1 switch contact on Shutter PCB

Test point: SW1 on Shutter PCB
Expected: Switch closes when activated, providing ground return path

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

Coolant overtemperature detected caution

"OVERHEATING" message displayed on LCD color display when coolant temperature exceeds setpoint; system is disabled until temperature drops to reset point.

Ranked causes

1. Coolant temperature exceeds setpoint (Ho:YAG & Ho/Nd:YAG = 45.5°C) (common)
2. Heat exchanger fan not running or blocked air flow (occasional)
3. Coolant contamination or insufficient deionization (occasional)

First check

Monitor coolant temperature reading on control electronics

Test point: Coolant temperature sensor input to CPU PCB
Expected: Below 45.5°C (Ho:YAG & Ho/Nd:YAG models)

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

Intermittent laser energy and power supply over temperature faults high voltage

Intermittent Laser Energy messages and Power Supply Over Temperature (Crowbar) faults occurring during operation

Ranked causes

1. Fiber optic cable improperly crimped causing fiber pull-out (common)
2. Fiber optic cable rough polished causing scatter and transmission losses (common)
3. High Voltage Power Supply controller PCB design issue requiring modifications (occasional)

First check

Inspect fiber optic cable connectors at HVPS and Controller PCB

Test point: both ends of fiber optic cable connectors
Expected: Connectors properly seated, fibers fully inserted without gaps

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

System fault code reported patient safety

Safety processor detects fault and displays two-digit hexadecimal code on CPU PCB LED display and touch screen

Ranked causes

1. Informational fault condition (unknown)
2. Clearable fault condition (unknown)
3. Permanent fault condition (unknown)

First check

Understand symptom details before troubleshooting

Test point: Observation
Expected: Determine if fault appears during self-test or operation; occurrence pattern (firing only, certain energy/pulse settings); repeatability

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

System turn-on failure high voltage

System fails to turn on and stay on when key switch is activated

Ranked causes

1. No power to unit or circuit breaker issue (common)
2. Main contactor not energizing (common)
3. Insufficient coolant flow (occasional)

First check

Verify mains power present at unit

Test point: Circuit breaker input
Expected: Power present

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

Calibration: Aiming beam adjustment high voltage

Aiming beam outputs inconsistent spot pattern or reduced power; appears doughnut-shaped rather than full bright red spot

Ranked causes

1. Aiming diode mount misaligned (common)
2. Folding mirror misaligned (common)

First check

Observe aiming beam output from fiber

Test point: Fiber output
Expected: Full spot of bright red light, no doughnut pattern

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

Calibration: Service Calibration (Nd:YAG laser gain adjustment) high voltage

Adjust reflectivity factors and optical transmission to match indicated power on display with external power meter reading for Nd:YAG laser output

Ranked causes

1. Reflectivity factors and transmission settings require calibration (common)
2. Nd:YAG software gain adjustment needed for dual wavelength systems (occasional)

First check

Verify all lasers enabled on service screen #1

Test point: Service screen #1
Expected: All lasers turned on

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

Coolant system contamination or leakage caution

Visible leakage from fittings, hoses, or heat exchanger; coolant conductivity elevated; system performance degraded.

Ranked causes

1. Hose or fitting deterioration; seal degradation (occasional)
2. Contamination from external sources or corrosion deposits (occasional)

First check

Visually inspect coolant system for leaks

Test point: All hose connections, heat exchanger, pump inlet/outlet, drain hose
Expected: No visible moisture or coolant dripping; dry connections

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

Integrator gain calibration required high voltage

Service screen power readings do not match external power meter measurements for ENERGY I or ENERGY III detectors

Ranked causes

1. ENERGY I integrator gain (R1) out of calibration (unknown)
2. ENERGY III integrator gain (R3) out of calibration (unknown)

First check

Fire laser and verify delivered power

Test point: External power meter
Expected: 6.0 Watts
Tools: External power meter

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

Low coolant or coolant conductivity error (F6, F52) caution

Coolant conductivity out of range or coolant temperature exceeds limit

Ranked causes

1. Coolant conductivity out of specification (occasional)
2. Coolant overtemperature condition (occasional)

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

OVERHEATING displayed on LCD caution

Coolant temperature exceeds set point threshold; system disabled until temperature falls to reset point

Ranked causes

1. Coolant temperature at or above set point (45.5°C for Ho:YAG or Ho/Nd:YAG) (common)
2. Ineffective heat exchanger or fan operation (occasional)

First check

Measure coolant temperature

Test point: Temperature sensor
Expected: Below 45.5°C (Ho:YAG/Ho/Nd:YAG)

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

Service attenuator positioned but 'ATTEN IN BEAM' message not displayed

Attenuator physically enters beam path but LCD display does not show 'ATTEN IN BEAM' message

Ranked causes

1. Slotted optical switch LPT1 not signaling position correctly to Controller PCB (common)
2. Controller PCB digital input (SERATNO) not reading optical switch state (occasional)

First check

Measure SERATNO signal voltage at Shutter PCB with attenuator in beam path

Test point: SER ATEN NO output on Shutter PCB
Expected: Signal grounded (0 V) when attenuator is positioned in beam path
Tools: Digital multimeter

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

Unable to enter service mode

System does not enter service mode when attempting to activate it via Controller PCB SW2 switch

Ranked causes

1. SW2 switch left ON during power-up (no OFF to ON transition) (common)
2. Microprocessors halted due to system fault (occasional)

First check

Verify SW2 switch position and state during power-up

Test point: Controller PCB SW2 (left of main microprocessor)
Expected: Switch transitions from OFF to ON during system startup

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

ADC busy timeout (F1) patient safety

ADC (analog-to-digital converter) remains in busy state longer than expected

Ranked causes

1. ADC hardware malfunction or timing error (unknown)

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

Calibration: Channel relay mirror peak adjustment high voltage

Procedure to adjust relay mirrors to maximize laser pulse amplitude on oscilloscope for each channel

Ranked causes

1. Relay mirror position requires adjustment to optimize beam coupling (unknown)

First check

Verify second wedge optic beam clearance with test aperture

Test point: Second wedge optic
Expected: Beam unclipped

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

Calibration: Energy monitor and auto laser calibration radiation

Adjusts energy monitor amplifier gains and optical transmission characteristics; establishes Volts/Joule conversion factor referencing delivered Holmium laser energy measured on calibrated external power meter.

Ranked causes

1. Energy monitor requires calibration adjustment (common)

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

Calibration: Energy Monitor and Pick-Off Gain high voltage

Adjustment procedure for Energy Monitor Calibration and Pick-Off Gain on Controller PCB, Single & Dual Solenoid PCBs following hardware changes

Ranked causes

1. Hardware changes to Controller PCB, Single & Dual Solenoid PCBs (common)

First check

Set laser operating parameters

Test point: Laser control panel
Expected: 40Hz repetition rate, one Holmium rod on, 50J lamp energy, 800V lamp voltage, READY state

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

Calibration: Fiber alignment high voltage

Positioning YAG beam down optical path into fiber center by adjusting relay mirrors and monitoring beam centering through aperture and detector box

Ranked causes

1. Relay mirror misalignment (common)

First check

Examine burn pattern at second wedge optic opening with test aperture

Test point: Second wedge optic opening
Expected: Burn is round and centered in aperture with no clipping

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

Calibration: Initial flash lamp drive calibration high voltage

Set start point flash lamp drive parameters for lamp energy normalization

Ranked causes

1. Flash lamp drive parameters require initial calibration (common)

First check

Verify NVRAM storage after CALIBRATE

Test point: Service screen #1 after DONE message
Expected: DONE message displayed; parameters persisted in NVRAM

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

Calibration: Laser pulse energy high voltage

Automatic calibration to determine cap charge voltages for lowest and highest selectable pulse energies for each of four laser rods.

Ranked causes

1. Calibration procedure required (common)

First check

Navigate to first service screen

Test point: LCD display
Expected: CALIBRATE button visible

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

Calibration: Optic replacement and realignment high voltage

Procedure after replacing a damaged optic to restore system alignment by adjusting the replaced optic rather than full procedure.

Ranked causes

1. Damaged optic requiring replacement (rare)

First check

Replace damaged optic using mounting and adjusting screws

Test point: Optic mount assembly
Expected: Optic properly seated in retainer with mounting screw secured

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

Calibration: Pyro mirror alignment high voltage

Pyro detector mirrors require alignment to ensure accurate system calibration. Alignment may also be needed after solenoid board replacement.

Ranked causes

1. Misaligned pyro mirrors (common)

First check

Set up laser for Holmium: turn on one flashlamp, set lamp energy to 50 Joules, lamp volts to 800V, repetition rate to 40 Hz

Test point: Service screen
Expected: Lamp energy 50 J, lamp volts 800 V, repetition rate 40 Hz
Tools: Service screen

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

Calibration: Servo motor and mirror alignment high voltage

Procedure to remove, reinstall and align the servo motor/encoder assembly and servo mirror to ensure proper laser beam routing to all four channels

Ranked causes

1. Motor/encoder assembly requires replacement or realignment (unknown)

First check

Verify motor shaft rotation and index position detection

Test point: TP24 (U73-19)
Expected: Goes high at index position or home position

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

Calibration: YAG channel alignment high voltage

YAG channel cavity HR positioning, output direction, relay mirror centering, and beam coaxiality with other YAG channels must be verified and adjusted to meet three criteria: HR positioned for center output to first relay mirror with maximum power OC position; first and second relay mirrors directing energy centered through wedge optic apertures and into fiber proximal end; each YAG beam coaxial with other channels at second wedge optic aperture and fiber port.

Ranked causes

1. YAG channel misalignment requiring adjustment (common)

First check

Verify cavity HR positioned to direct YAG output to center of first relay mirror

Test point: First relay mirror centerline
Expected: Output directed to center

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

CPU test failed (F8) patient safety

Main processor CPU test fails during self-test

Ranked causes

1. Main processor CPU hardware failure (rare)

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

Display problems (screen lock up, jumbled/erratic operation)

Screen lock up or jumbled and erratic display operation on system display

Ranked causes

1. Outdated software revision (pre-revision E 0629-141-01) (common)

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

EPROM socket compatibility issue caution

Controller PCB may have incompatible socket types (28 pin vs 32 pin) preventing proper software installation

Ranked causes

1. Controller PCB earlier than revision C with 28 pin sockets (common)

First check

Verify Controller PCB socket type in U79 and U87 positions

Test point: U79 and U87 socket pins
Expected: 32 pin sockets for revision E software; 28 or 32 pin sockets acceptable for older software if properly positioned

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

Fan noise excessive

Fan running at high RPM producing loud noise during operation

Ranked causes

1. Fan speed controller not optimized for noise reduction (common)

First check

Verify fan controller idle speed

Test point: Visual inspection during operation
Expected: Fan idles slightly faster than before, speeds up more quickly when required

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

High voltage power supply error (F14) high voltage

HVPS (high voltage power supply) detects error condition

Ranked causes

1. HVPS overvoltage, overcurrent, or thermal condition (unknown)

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

Intermittent 20% energy messages

Intermittent 20% High and Low energy messages displayed on screen along with fault 36/56 and various display problems

Ranked causes

1. Outdated software revision (pre-revision E 0629-141-01) (common)

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

Intermittent 20% high and low energy messages

System displays intermittent messages indicating energy at 20% above or below expected levels

Ranked causes

1. Software revision earlier than E 0629-141-01 (common)

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

Laser overheating during continuous operation

System temperature rises excessively when operated continuously for more than a few minutes

Ranked causes

1. Fan speed controller not adequately improving cooling characteristics (occasional)

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

Loss of coolant flow detected caution

System will not start or shuts down if coolant flow is insufficient; monitored by SW3 flow switch as part of 24 VAC loop to main contactor.

Ranked causes

1. Flow switch SW3 malfunction or inadequate coolant circulation (unknown)

First check

Verify coolant pump operation and flow

Test point: Laser head inlet/outlet, pump output
Expected: Visible coolant circulation through system

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

Overheating message displays incorrectly caution

System displays overheating warning at higher than expected water temperature threshold

Ranked causes

1. Software earlier than revision E lacks temperature compensation (common)

First check

Monitor water temperature when overheating message appears

Test point: Water temperature sensor
Expected: Below 40½C

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

Overheating message displays prematurely

Overheating message displays when water temperature reaches 40½C instead of expected higher threshold

Ranked causes

1. Water temperature exceeding 40½C setpoint (common)

First check

Monitor water temperature

Test point: water temperature sensor
Expected: below 38½C for reset, display triggers at 40½C

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

Service mode entry fails

Main or safety microprocessor does not recognize service switch transition; system does not enter service mode.

Ranked causes

1. Service switch SW2 not toggled OFF to ON during power-up (common)

First check

Verify SW2 is to the left of main microprocessor and toggled during power-up

Test point: Controller PCB SW2
Expected: OFF to ON transition during power-up

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

UART break condition detected (F2) patient safety

Serial communication UART detects break condition on data line

Ranked causes

1. Serial communication line break or interference (unknown)

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

YAG channel partial adjustment for minor misalignment high voltage

Quick alignment procedure when single channel is only slightly out of center at fiber port, using first relay mirror adjustment and test fiber burn confirmation.

Ranked causes

1. Single YAG channel slightly out of center at fiber port (occasional)

First check

Adjust first relay mirror using fiber detector signal

Test point: First relay mirror adjustment screws
Expected: Fiber detector signal optimized; beam centered into proximal end of fiber

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

Error codes

Code	Meaning	Trigger	Severity
`F1`	ADC remains busy too long	ADC does not complete conversion within timeout period	error
`F100`	HVPS switches wrong. (UP = Ho, DN = Nd)	HVPS laser selection switches are set to wrong laser module combination	error
`F101`	Fiber to HVPS bad	Laser delivery fiber connection or interface to HVPS is defective or disconnected	warning
`F102`	HVPS overheating	HVPS thermal temperature sensor indicates overtemperature condition	warning
`F103`	HVPS analog readback channel bad	HVPS analog feedback measurement circuit detects fault or signal error	warning
`F104`	Lamp voltage error	Lamp (lamp-pumped laser) supply voltage outside acceptable range	info
`F105`	Pulsewidth too low	Laser pulse width measurement falls below minimum acceptable value	warning
`F109`	Model not recognized	System firmware cannot identify connected laser module or system variant	error
`F11`	Error processor error	Safety/error processor detects internal fault during self-test	error
`F110`	Safety DAC defective	Safety-critical digital-to-analog converter self-test fails	error
`F111`	Firepulse active	Fire pulse signal remains active when it should be inactive (informational)	error
`F112`	Pulsewidth too high	Laser pulse width measurement exceeds maximum acceptable value	warning
`F113`	SP reports illegal pulse interval	Safety processor detects pulse interval outside valid range	error
`F114`	SP reports bad max. rate	Safety processor detects maximum pulse rate setting outside specification	error
`F115`	SP reports bad max. energy	Safety processor detects maximum energy setting outside specification	error
`F116`	SP reports illegal pulse rate	Safety processor detects pulse rate outside valid operating range	error
`F117`	SP reports illegal pulse rate	Safety processor reports second occurrence of pulse rate outside specification	error
`F118`	MP finds SP not idle	Main processor detects safety processor still processing previous command	error
`F119`	Failed energy low test	Energy calibration low-point test fails during self-test	error
`F12`	Spurious firepulse interrupt	Unexpected fire pulse interrupt signal detected	warning
`F120`	Failed energy high test	Energy calibration high-point test fails during self-test	error
`F121`	SP reports wrong error in safety test	Safety processor reports incorrect error code during safety self-test	error
`F122`	SP reports no error in safety test	Safety processor fails to report error when safety test detects fault condition	error
`F123`	SP reports incorrect footswitch configuration	Safety processor detects footswitch configuration mismatch at startup	error
`F124`	SP not in test mode	Safety processor not ready to enter test mode when commanded (informational)	info
`F125`	Calibration failed	System energy or parameter calibration procedure fails to complete	error
`F126`	HVPS stuck in softstart	HVPS soft-start circuit cannot transition to full power output	error
`F127`	SP failed test(s)	Safety processor internal self-test fails (multiple possible failures)	error
`F128`	SP calibration bad data	Safety processor calibration data fails integrity check	error
`F129`	SP CRC error	Safety processor program CRC checksum verification fails	error
`F13`	UART detected framing error	Serial data received with incorrect stop/start bit pattern	warning
`F130`	SP DRAM-check error	Safety processor dynamic RAM self-test fails	error
`F131`	Other SP error at startup	Safety processor reports unspecified error during power-on startup	error
`F132`	Marks end of error log	Last entry in system error log reached	info
`F133`	HVPS volts command channel bad	HVPS voltage command ADC input channel detects circuit failure or signal error	warning
`F134`	HVPS current command channel bad	HVPS current command ADC input channel detects circuit failure or signal error	warning
`F136`	SP reports incorrect FS status	Safety processor detects inconsistent footswitch status	error
`F137`	Crowbar not fired when it should be	HVPS overvoltage detected but crowbar safety discharge circuit fails to activate	critical
`F138`	Wrong lamp voltage (not displayed)	Lamp supply voltage error detected internally (not shown on operator display)	warning
`F139`	Crowbar fired (not displayed)	Crowbar safety discharge has fired; error not displayed to operator (informational)	warning
`F14`	High voltage power supply error	HVPS detects overvoltage, overcurrent, or shutdown condition	warning
`F140`	HVPS DC not set	High voltage power supply initialization failure	error
`F141`	No fire pulse detected	Fire pulse detection failure during testing	error
`F142`	Holmium laser not cleared	Holmium laser residual energy at startup	error
`F143`	Nd laser not calibrated	Nd laser output calibration missing or failed	error
`F144`	Holmium laser rod energy low	Holmium rod laser output below minimum energy	unknown
`F145`	Safety test failed	Could not perform safety test	critical
`F146`	All Nd lasers off	All Nd laser tubes are inactive	error
`F147`	Too many shots in self-test	Excessive number of laser shots during self-test	error
`F148`	Crowbar diagnostic no result	Crowbar circuit test produced no measurable result	error
`F149`	Temperature sensor disconnected	Temperature sensor not detected during self-test	unknown
`F15`	Main program dead	Main processor program execution halted or infinite loop detected	error
`F150`	Laser 1 cannot reach 90% of max energy	Laser #1 output below 90 percent of rated maximum	error
`F151`	Laser 2 cannot reach 90% of max energy	Laser #2 output below 90 percent of rated maximum	error
`F152`	Laser 3 cannot reach 90% of max energy	Laser #3 output below 90 percent of rated maximum	error
`F153`	Laser 4 cannot reach 90% of max energy	Laser #4 output below 90 percent of rated maximum	error
`F16`	-15V supply voltage wrong	-15V power supply output outside acceptable range	warning
`F17`	Nonexistent error code	Safety processor reports undefined fault code number	error
`F18`	UART detected data overrun error	Received serial data before previous byte was read (buffer overflow)	warning
`F19`	+5V supply voltage wrong	+5V power supply output outside acceptable range	warning
`F2`	UART detected break condition	Serial communication line held low beyond break timeout	warning
`F20`	UART detected parity error	Received serial data with incorrect parity bit	warning
`F21`	+15V supply voltage wrong	+15V power supply output outside acceptable range	warning
`F22`	ROM CRC check failed	Read-only memory checksum verification fails during startup	error
`F23`	Safety related data error	Safety processor detects corruption in critical safety data	error
`F24`	Shutter drive stuck off	Shutter solenoid or actuator fails to open when commanded	warning
`F25`	Shutter drive stuck on	Shutter solenoid or actuator fails to close when commanded	error
`F26`	Servo error	Servo motor feedback or control error detected	error
`F27`	Software error	Unhandled exception or illegal instruction in main processor software	error
`F28`	Safety shutter not closed	Shutter position sensor indicates shutter not closed when required	error
`F29`	Safety shutter not open	Shutter position sensor indicates shutter not open when required for beam path	error
`F3`	1st 68230 malfunction	68230 parallel interface chip fails self-test or operation check	error
`F32`	DAC feedback check error	Digital-to-analog converter feedback check fails during self-test	error
`F33`	HCTL servo controller broken	HCTL motion control IC fails internal test or communication check	warning
`F34`	DPRAM data incorrect	Dual-port RAM data verification check fails	error
`F35`	No fire set	No firing command set when firing expected during operation	error
`F36`	Safety processor error	Safety processor reports internal error or fault condition (not elsewhere listed)	error
`F37`	Software detects energy high	Measured laser energy exceeds set point plus tolerance	error
`F38`	Software detects energy low	Measured laser energy below set point minus tolerance	error
`F4`	2nd 68230 malfunction	Second 68230 parallel interface chip fails test	error
`F40`	Pulse rate too high	Measured pulse rate exceeds maximum rate setting or hardware limit	error
`F41`	Pulse rate too low	Measured pulse rate below minimum rate setting or expected rate	error
`F42`	Unexpected fire pulse	Fire pulse detected when system not in fire command mode	warning
`F43`	DPRAM handshake error	Dual-port RAM synchronization handshake between processors fails	error
`F44`	MP - SP firing parameter mismatch	Main processor and safety processor firing parameters disagree	error
`F45`	DPRAM failed test	DPRAM self-test or read-write test fails during startup	error
`F46`	No delivery system attached	Delivery system connector not seated or delivery system missing	error
`F47`	Footswitch disconnect or broken	Footswitch signal is missing or does not respond to press during self-test	error
`F48`	Footswitch down during self test	Footswitch held down or stuck when system power-on self-test runs	error
`F49`	System inactive	System detects no activity for extended period (not used)	warning
`F50`	Remote interlock open	Remote safety interlock circuit is open	error
`F51`	No control panel	Control panel not responding to communication from main processor	error
`F52`	Coolant over temperature	Coolant temperature exceeds safe operating limit	warning
`F53`	Performing self test	System self-test sequence is running (informational only)	info
`F55`	System not calibrated	Energy or other critical system calibration has not been performed	error
`F56`	Failed safety test: energy	Energy safety test during startup detects out-of-range energy value	error
`F57`	Failed safety test: pulse interval	Pulse interval safety test during startup detects incorrect timing	error
`F58`	NVRAM checksum incorrect	Non-volatile RAM checksum verification fails at startup	error
`F59`	NVRAM system data incorrect	System configuration data in NVRAM fails integrity check	error
`F6`	Coolant conductivity wrong	Coolant conductivity measurement outside acceptable range	warning
`F60`	Energy monitor hardware error	Energy monitoring circuit self-test fails	error
`F61`	Program flow error	Main processor detects unexpected program flow or jump to invalid address	error
`F62`	Energy 20% high	Measured laser energy 20% above set point (informational)	info
`F63`	Energy 20% low	Measured laser energy 20% below set point (informational)	info
`F64`	Pulse rate 20% high	Measured pulse rate 20% above set point (informational)	info
`F65`	Pulse rate 20% low	Measured pulse rate 20% below set point (informational)	info
`F66`	Front communication time out	Communication with front panel control or display times out	warning
`F67`	Software too slow	Main processor software execution time exceeds real-time deadline	error
`F68`	Blastshield missing	Blastshield (protective enclosure) not installed or misaligned during self-test	error
`F7`	Communication data error	Data integrity check fails in inter-processor communication	error
`F70`	No fire test failed	System cannot successfully block firing during no-fire safety test at startup	error
`F71`	Autocalibration disabled	Autocalibration feature has been disabled (informational)	info
`F72`	Service attenuator in beam path	Service attenuator detected in laser beam path during operation	info
`F73`	All Holmium lasers are off	All Holmium laser tubes are detected in off state (informational)	info
`F74`	Max. energy reduced	Maximum energy output has been automatically reduced (informational)	info
`F75`	Maximum pulse rate reduced	Maximum pulse rate has been automatically limited (informational)	info
`F78`	Wrong laser fired	Fire pulse detected from laser other than one selected by operator	error
`F79`	Exposure time limit exceeded	Cumulative exposure time during treatment session exceeds safe limit	error
`F8`	CPU test failed main processor has failed	Main processor CPU self-test fails	error
`F81`	Low energy attenuator position error	Low energy attenuator position sensor reports inconsistent position	error
`F82`	SP failed time exposure test	Safety processor time/exposure measurement test fails during self-test	error
`F83`	SP failed rod id test	Safety processor laser rod identification test fails at startup	error
`F84`	Pulse repetition mode error	Pulse repetition mode setting inconsistent or invalid	error
`F85`	SP failed repetition mode test	Safety processor pulse repetition mode test fails during self-test	error
`F86`	Brick 1 failure	Solid-state laser brick 1 (HVPS module 1) detects fault condition	warning
`F87`	Brick 2 failure	Solid-state laser brick 2 (HVPS module 2) detects fault condition	warning
`F88`	Brick 3 failure	Solid-state laser brick 3 (HVPS module 3) detects fault condition	warning
`F89`	Brick 4 failure	Solid-state laser brick 4 (HVPS module 4) detects fault condition	warning
`F90`	Dual footswitch bad	Dual footswitch circuit or communication detects failure	error
`F92`	Pulsewidth readback not the same as requested	Laser pulse width measurement does not match commanded setting	warning
`F93`	Time out after firepulse	System times out waiting for completion signal after fire pulse sent	warning
`F94`	Crowbar fired	Crowbar (emergency high-voltage discharge) safety circuit has fired (informational)	info
`F95`	Crowbar test failed	Crowbar safety discharge circuit test fails during self-test	error
`F99`	HVPS balance bad. (UP=Ho, DN=Nd)	High voltage power supply output voltage imbalance between supply rails	warning
`Fault 10`	Unspecified system fault	Multiple causes related to software or power supply issues	error
`Fault 10`	General system fault or communication error	Software incompatibility or system communication failure	warning
`Fault 36/56`	Laser energy or power supply over temperature fault	Inadequate HVPS communication or excessive operating temperature	error
`Overheating`	Water temperature exceeds safe operating threshold	Water temperature reaches 40½C	warning

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