Patient monitors · SureSigns family

Philips SureSigns VS2+: troubleshooting and error codes

The ServiceForge knowledge base holds 39 documented symptoms for the Philips SureSigns VS2+, with 106 ranked causes, 101 diagnostic checks with test points and expected values, and 122 error codes. Each symptom below shows its causes and the first check; the rest is one connection away. Connect ServiceForge to your AI

Symptoms

Monitor does not power up with AC power high voltage

Monitor powers on with battery but not with AC power supply connected

Ranked causes

1. Power cord is unplugged (common)
2. Power cord is broken (occasional)
3. Fuse is blown (common)
4. Power supply cable malfunctioned (occasional)
5. Power supply malfunctioned (occasional)
6. AC power connector malfunctioned (occasional)
7. Monitor keypad is worn (rare)
8. Main board malfunctioned (rare)

First check

Verify power cord connection

Test point: AC outlet
Expected: Power cord plugged in

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

Temperature measurements are not displayed patient safety

Temperature module fails to display or output measurement readings

Ranked causes

1. Probe is misplaced (common)
2. Probe cable is not connected (common)
3. Monitor has not completed start-up sequence (common)
4. Probe malfunctioned (occasional)
5. Temperature is over range (occasional)
6. Temperature module malfunctioned (rare)
7. Main board malfunctioned (rare)

First check

Verify probe placement at measurement site

Test point: Temperature probe location
Expected: Probe at proper anatomical site (oral, axillary, rectal per protocol)

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

NBP measurements are not displayed patient safety

Blood pressure module does not output or display measurement readings

Ranked causes

1. Wrong cuff size or incorrect cuff placement (common)
2. Tube is bent/twisted or air leakage in tube/cuff (common)
3. Problem external to monitor occurred (occasional)
4. Initial inflation pressure setting is incorrect (occasional)
5. NBP module error occurred (rare)
6. Main board malfunctioned (rare)

First check

Verify correct cuff size selected

Test point: Cuff size selector or patient configuration
Expected: Cuff size matches patient arm circumference per manual

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

Recorder does not print

Optional recorder unit installed and selected but produces no output on paper

Ranked causes

1. Optional recorder is not installed (common)
2. Recorder is out of paper (common)
3. Recorder door is open (common)
4. System does not recognize recorder (occasional)
5. Recorder module malfunctioned (occasional)
6. Main board malfunctioned (rare)

First check

Verify recorder module is physically installed

Test point: Recorder module slot or connector
Expected: Recorder module inserted and seated

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

Nurse call function does not signal alarm conditions patient safety

Nurse call system does not activate or transmit alarm status to call station

Ranked causes

1. Minimum Nurse Call Alarm Priority is set too high (common)
2. Alarms have been silenced (common)
3. Phono connector is loose or broken (occasional)
4. Communications board malfunctioned (occasional)
5. Main board malfunctioned (rare)

First check

Verify Minimum Nurse Call Alarm Priority setting

Test point: Monitor configuration menu
Expected: Priority threshold set to appropriate level for facility

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

Audible alarms do not sound patient safety

Unit does not produce audio output when alarm conditions are triggered

Ranked causes

1. Monitor is in Audio Pause or Audio Off mode (common)
2. Connection to speaker is faulty (common)
3. Speaker is faulty (occasional)
4. Main board malfunctioned (rare)

First check

Verify audio mode setting

Test point: Monitor audio control menu
Expected: Audio mode set to normal (not Audio Off or Audio Pause)

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

Monitor does not respond to navigation wheel or keys

Front panel controls unresponsive; navigation wheel or buttons do not trigger expected functions

Ranked causes

1. Main board has faulty connection (common)
2. Monitor keypad or navigation wheel is broken (common)
3. Main board malfunctioned (rare)
4. Membrane switch assembly malfunctioned (rare)

First check

Inspect all main board connector seats

Test point: Main board connectors for controls and wheel
Expected: All connectors fully inserted and locked

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

Monitor does not turn on with AC or battery power high voltage

Monitor completely non-responsive to power, no indicators or display activity

Ranked causes

1. Power cord unplugged and battery not installed or charged (common)
2. Cables are disconnected (common)
3. Main board malfunctioned (rare)
4. Membrane switch assembly malfunctioned (rare)

First check

Verify power cord is plugged in

Test point: AC outlet and monitor
Expected: Power cord firmly connected

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

Monitor turns on with AC power but not battery power

Monitor powers on with AC power but fails to power on when using battery only

Ranked causes

1. Battery is not charged (common)
2. Battery connector is loose (common)
3. Battery not connected to main board (occasional)
4. Main board malfunctioned (rare)

First check

Check battery charge level

Test point: Battery status indicator
Expected: Battery fully charged

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

NBP cuff does not inflate patient safety

Blood pressure measurement cuff fails to inflate during NBP measurement attempt

Ranked causes

1. Tube or cuff is bent or twisted (common)
2. Tube or cuff is leaking air (common)
3. NBP module malfunctioned (occasional)
4. Main board malfunctioned (rare)

First check

Inspect NBP tubing path

Test point: Cuff tube entire length
Expected: Tube straight and unkinked

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

NBP measurements are unreliable patient safety

Blood pressure readings are inconsistent, erratic, or outside expected range

Ranked causes

1. Wrong cuff size or incorrect cuff placement (common)
2. External problem occurred (common)
3. Initial inflation pressure setting is incorrect (occasional)
4. Calibration is unreliable (occasional)

First check

Verify cuff size matches patient

Test point: Patient arm circumference vs cuff size
Expected: Correct cuff size for patient

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

SpO2 measurements are not displayed patient safety

Pulse oximetry module fails to display or output saturation readings

Ranked causes

1. SpO2 module is in learning phase (common)
2. SpO2 sensor malfunctioned (common)
3. SpO2 board malfunctioned (occasional)
4. Main board malfunctioned (rare)

First check

Verify SpO2 module learning phase status

Test point: Module startup status indicator
Expected: Learning phase complete; module ready

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

USB hub does not work

USB hub connected to monitor is non-responsive; external USB devices not recognized or accessible

Ranked causes

1. USB hub is disconnected from monitor (common)
2. USB hub ports are blocked by dust or dirt (common)
3. USB hub is faulty (occasional)
4. Communications board is broken or not properly connected (occasional)

First check

Verify USB hub physical connection to monitor

Test point: USB connector at monitor and hub
Expected: USB plugs firmly inserted in ports

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

AUDIO FAILED error message displayed caution

Flashing red/white box with AUDIO FAILED message appears on screen

Ranked causes

1. Speaker malfunctioned (occasional)
2. Connection to speaker is faulty (common)
3. Speaker is faulty (occasional)

First check

Verify speaker cable connection

Test point: Speaker connectors
Expected: Cable firmly connected to speaker and audio circuit

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

Monitor displays random or distorted graphics with white background

Display shows garbled or corrupt image with white background color

Ranked causes

1. LCD cable is not attached correctly (common)
2. LCD malfunctioned (occasional)
3. Main board malfunctioned (rare)

First check

Inspect and reseat LCD signal cable

Test point: LCD cable connectors at main board and display
Expected: Cable firmly seated in both connectors

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

Monitor screen blank with power on

Power is on and unit appears functional but display shows no image

Ranked causes

1. Monitor is in Standby mode (common)
2. Main board malfunctioned (rare)
3. LCD is faulty (occasional)

First check

Check Standby mode status

Test point: Monitor power state
Expected: Monitor not in Standby

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

Recorder paper is jamming

Paper in optional recorder becomes stuck, preventing print operation

Ranked causes

1. Paper is not installed correctly (common)
2. Wrong type of paper is installed (common)
3. Recorder has mechanical problem (occasional)

First check

Verify paper installation procedure

Test point: Recorder paper path and guides
Expected: Paper properly threaded and seated in paper holder

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

Temperature measurements are unreliable patient safety

Temperature readings are inconsistent, erratic, or suspect

Ranked causes

1. Probe malfunctioned (common)
2. Module is not calibrated (common)
3. Temperature module malfunctioned (occasional)

First check

Replace temperature probe

Test point: Temperature measurement
Expected: Consistent readings from probe

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

Unit does not power on

Monitor shows no power indicators, display does not function

Ranked causes

1. Power cord not connected or AC outlet inactive (common)
2. Power switch not activated (common)
3. Battery not adequately charged (occasional)

First check

Verify AC outlet power

Test point: AC outlet
Expected: Power available

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

Battery service required message displayed patient safety

Monitor displays 'Battery service required' message on screen

Ranked causes

1. Max Error value exceeds 8% (common)
2. Full Capacity value is half of Design Capacity value (common)

First check

Check battery error values

Test point: Battery diagnostics
Expected: Max Error less than 8%, Full Capacity at least 50% of Design Capacity

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

Monitor does not power on

Unit not responding to power button, LEDs not lit, no display output when AC power cord or battery connected

Ranked causes

1. AC power not supplied (common)
2. Battery inadequately charged (common)

First check

Verify power supply

Test point: AC outlet and power cord connection
Expected: Power cord seated in monitor; outlet providing power

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

NBP initial pressure too high patient safety

Blood pressure cuff reaches excessive initial inflation pressure during measurement cycle

Ranked causes

1. Cuff is too tight (common)
2. Initial inflation pressure setting is incorrect (common)

First check

Inspect cuff fit on patient arm

Test point: Cuff tightness and position
Expected: Cuff snug but not cutting off circulation; one finger fits under cuff

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

SpO2 readings are unreliable patient safety

Pulse oximetry measurements are inconsistent, erratic, or missing data

Ranked causes

1. Problem external to monitor occurred (common)
2. Perfusion is low (occasional)

First check

Verify SpO2 sensor is compatible and correctly placed

Test point: Sensor type and patient application site
Expected: Compatible sensor properly attached with good perfusion

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

Audio test or speaker verification needed

Operator or technician needs to verify speaker function by listening for tones at different decibel levels

Ranked causes

1. Routine speaker verification procedure (common)

First check

Listen for audio test tones

Test point: Monitor speaker output
Expected: Three short tones audible at different Db levels

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

Calibration: Performance verification testing patient safety

Post-installation, post-repair and post-maintenance verification procedures to ensure monitor meets performance specifications

Ranked causes

1. Monitor requires verification after installation, repair, or software upgrade (common)

First check

Perform Power-on self test

Test point: Monitor startup
Expected: Self-test completes without error

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

Calibration: Pneumatic leakage test

Check pneumatic system and valve performance by measuring pressure drop over time

Ranked causes

1. Pneumatic system leakage exceeds acceptable level (unknown)

First check

Select Start Static Pressure Test in NBP Test menu

Test point: NBP Test menu
Expected: Static Pressure Test started

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

Calibration: Reset tracked parameters

Monitor tracks LCD usage hours, NBP cycle count, and error count. Reset procedure required after replacing associated parts.

Ranked causes

1. Parameter reset required after part replacement (common)

First check

Access Maintenance options

Test point: Monitor menu
Expected: Maintenance menu appears

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

Calibration: Temperature measurement

Verify accuracy of temperature probe and measurement system using calibration key

Ranked causes

1. Temperature measurement accuracy needs verification (unknown)

First check

Connect temperature probe to monitor

Test point: Temperature probe connector
Expected: Probe connected

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

Charging LED does not function as expected

LED Test initiated but Charging LED does not cycle through yellow/green states or flash patterns as specified

Ranked causes

1. Charging LED hardware failure or driver circuit fault (common)

First check

Run LED Test in System Diagnostics and observe Charging LED behavior

Test point: Charging LED on monitor front panel; AC Power LED
Expected: Yellow 5 sec → Green 5 sec → Yellow flash 5 sec → Green flash 5 sec; AC Power LED stays green

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

Display not functioning or incorrect

LCD screen shows no output, blank display, or unexpected content after power-on sequence

Ranked causes

1. Display hardware failure (unknown)

First check

Verify monitor power and display status

Test point: LCD screen
Expected: Display functional with correct content

1 more check with pass and fail actions are in ServiceForge. Connect ServiceForge to your AI

Front panel LEDs not lit as expected

Indicator lights on front panel not illuminated or lit incorrectly during operation

Ranked causes

1. Delayed LED response after power state change (occasional)

First check

Observe AC Power LED timing

Test point: Front panel AC Power LED
Expected: LED response within several seconds of power cord connection or disconnection

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

Key is collapsed or does not click

Front panel key physically damaged, depressed, or does not provide tactile feedback when pressed

Ranked causes

1. Membrane switch assembly malfunctioned (common)

First check

Inspect physical condition of all front panel keys

Test point: Each key dome and button face
Expected: All keys firm and provide click when pressed

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

Monitor turns on, opening screen starts, then freezes

Unit powers on and boots partially but display freezes during startup sequence

Ranked causes

1. Main board malfunctioned (common)

First check

Attempt to reset monitor

Test point: Power button
Expected: System completes startup sequence

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

No display or incorrect display

LCD does not show expected startup sequence or display is blank/garbled after power applied

Ranked causes

1. LCD failure or connection issue (unknown)

First check

Verify front panel LEDs

Test point: Front panel LEDs
Expected: LEDs lit as expected during startup

Nurse call relay not responding to alarms

Nurse call alarm output relay (phone jack connector) fails to operate correctly during alarm conditions

Ranked causes

1. Relay contacts not closing/opening as expected (unknown)

First check

Measure continuity at Tip contact (Relay Normally Open) during alarm condition

Test point: Nurse Call connector Tip
Expected: Closed

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

Only one Battery Charging LED color displayed

Battery charging indicator shows only one color instead of expected color sequence

Ranked causes

1. Membrane switch assembly malfunctioned (common)

First check

Observe LED color display during charging

Test point: Battery charging LED
Expected: Color sequence should change during charge cycle

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

Pressing key does not access expected function caution

Front panel keys trigger incorrect functions; for example Print key initiates NBP measurement instead

Ranked causes

1. Membrane switch assembly malfunctioned (common)

First check

Verify key function mapping is correct

Test point: Each front panel key
Expected: Each key triggers its labeled function

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

Replace fuse in AC power connector high voltage

Fuse replacement procedure for AC power connector on rear of monitor

Ranked causes

1. Fuse failure (unknown)

First check

Remove AC power cord from rear of monitor

Test point: AC power connector rear
Expected: Power cord disconnected

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

Self test fails to detect module or reports error patient safety

Running the Self Test detects missing module or test error occurs; affects SpO2, NBP, or Predictive Temperature modules

Ranked causes

1. Module hardware not connected or malfunctioning (unknown)

1 more check 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
`1025`	System Error	Could not load ResourceDLL.dll	error
`1026`	System Error	Could not load data from flash memory	error
`1027`	System Error	Could not start front end	error
`1028`	System Error	Could not stop front end	error
`1029`	System Error	Could not allocate enough memory	error
`1030`	System Error	Error shutting down front end devices	error
`1031`	System Error	Monitoring and watchdog thread failed to initialize	error
`1032`	System Error	Could not open audio files	error
`1033`	System Error	Unspecified system error	error
`1034`	System Error	Failed to load product information	error
`1035`	System Error	Cannot initialize front end manager	error
`1036`	System Error	Failed to start work thread	error
`1037`	System Error	Cannot start polling thread	error
`1042`	System Error	Failed to start network driver	error
`1043`	System Error	Front end software error	error
`1044`	System Error	Front end software error	error
`1045`	System Error	Printing software error	error
`1047`	System Error	Monitoring software error	error
`1048`	System Error	Exception in alarming software	error
`1050`	System Error	Failed to stop work thread	error
`1051`	System Error	Cannot initialize NBP	error
`1052`	System Error	Memory error detected	error
`1053`	System Error	Loss of monitoring	info
`257`	System Error	Battery charger power failure	error
`261`	System Error	Battery is overcharged	warning
`264 temp value`	System Error	Battery over temperature	warning
`817`	FPGA FIFO Overrun	NBP software error	info
`818 (101)`	NBP Equip Malfunc (101)	Task overrun	error
`818 (102)`	NBP Equip Malfunc (102)	Interrupt stack overwritten	error
`818 (103)`	NBP Equip Malfunc (103)	User stack overwritten	error
`818 (104)`	NBP Equip Malfunc (104)	Data validity check failed	error
`818 (106)`	NBP Equip Malfunc (106)	Unable to write init flag data to non-volatile memory	error
`818 (107)`	NBP Equip Malfunc (107)	Unable to verify init flag data written to non-volatile memory	error
`818 (109)`	NBP Equip Malfunc (109)	Unable to write NBP configuration data to non-volatile memory	error
`818 (110)`	NBP Equip Malfunc (110)	Unable to write NBP configuration data to non-volatile memory	error
`818 (111)`	NBP Equip Malfunc (111)	Calibration data checksum error	error
`818 (112)`	NBP Equip Malfunc (112)	Unable to write calibration data to non-volatile memory	error
`818 (113)`	NBP Equip Malfunc (113)	Unable to verify calibration data written to non-volatile memory	error
`818 (114)`	NBP Equip Malfunc (114)	Error log checksum error	error
`818 (115)`	NBP Equip Malfunc (115)	Unable to write error log to non-volatile memory	error
`818 (116)`	NBP Equip Malfunc (116)	Unable to verify error log data written to non-volatile memory	error
`818 (117)`	NBP Equip Malfunc (117)	Inflation cycle count and runtime data checksum error	error
`818 (118)`	NBP Equip Malfunc (118)	Unable to write inflation cycle count and runtime data to non-volatile memory	error
`818 (119)`	NBP Equip Malfunc (119)	Unable to verify inflation cycle count and runtime data written to non-volatile memory	error
`818 (120)`	NBP Equip Malfunc (120)	New message queuing before previous message finished	error
`818 (121)`	NBP Equip Malfunc (121)	Pressure value from second pressure sensor not available	error
`818 (122)`	NBP Equip Malfunc (122)	5-volt supply voltage value is too high or low	error
`818 (123)`	NBP Equip Malfunc (123)	Error from 5-volt regulator	error
`818 (124)`	NBP Equip Malfunc (124)	12-volt supply voltage value is too high or low	error
`818 (128)`	NBP Equip Malfunc (128)	Offset of pressure sensor 1 is out of range	error
`818 (129)`	NBP Equip Malfunc (129)	Offset of pressure sensor 2 is out of range	error
`818 (130)`	NBP Equip Malfunc (130)	Response of pressure sensor 2 to test signal is out of range	error
`818 (131)`	NBP Equip Malfunc (131)	Difference between two pressure channels is too large	error
`818 (132)`	NBP Equip Malfunc (132)	One of the two valves was activated for too long	error
`818 (133)`	NBP Equip Malfunc (133)	CRC mismatch in calibration data	error
`818 (134)`	NBP Equip Malfunc (134)	CRC mismatch in error log data	error
`818 (135)`	NBP Equip Malfunc (135)	CRC mismatch in inflation cycle count and runtime data	error
`818 (136)`	NBP Equip Malfunc (136)	Pneumatic safety switch is defective	error
`818 (137)`	NBP Equip Malfunc (137)	Valve 2 is defective or blocked	error
`818 (141)`	NBP Equip Malfunc (141)	Inflation time for selected patient type exceeded	warning
`818 (15)`	NBP Equip Malfunc (15)	NBP abnormal unrecoverable system errors with internal firmware	error
`818 (199)`	NBP Equip Malfunc (199)	No data from NBP block	error
`818 (2)`	NBP Equip Malfunc (2)	NBP power-on self test failed; A/D converter inoperative or pressure transducer offset too large	error
`818 (25)`	NBP Equip Malfunc (25)	NBP hardware has malfunctioned because there is no data	error
`819`	NBP Equip Malfunc - Not Calibrated	NBP not calibrated	warning
`819 (127)`	NBP Equip Malfunc (127)	NBP module is not calibrated	warning
`819 (138)`	NBP Hose Blocked (138)	Problem in pneumatic system	error
`819 (139)`	NBP Air Leak (139)	Air leak or valve defect	error
`833 (1)`	SpO2 Equip Malfunc (1)	SpO2 ROM checksum error	error
`833 (10)`	SpO2 Equip Malfunc (10)	SpO2 host communication error	error
`833 (2)`	SpO2 Equip Malfunc (2)	SpO2 RAM test error	error
`833 (20)`	SpO2 Equip Malfunc (20)	SpO2 hardware defect	error
`833 (4)`	SpO2 Equip Malfunc (4)	SpO2 analog signal path self-test failed	error
`833 (40)`	SpO2 Equip Malfunc (40)	SpO2 non-volatile memory corrupted	error
`833 (6)`	SpO2 Equip Malfunc (6)	SpO2 self-test timeout	error
`833 (8)`	SpO2 Equip Malfunc (8)	SpO2 internal DSP communication error	error
`834`	SpO2 Sensor Malfunc	Malfunction of SpO2 sensor or sensor cable	error
`835`	FPGA FIFO Overrun	SpO2 software error	info
`836`	SpO2 Communication Error	SpO2 communication error	info
`837`	SpO2 Error. Front end will now reset itself	No data from SpO2	warning
`865`	FPGA FIFO Overrun	Temperature software error	info
`866 (21)`	Temp Probe Error (21)	Probe operating above 112F/43.3C; heater too close to thermistor	error
`866 (22)`	Temp Probe Error (22)	Excessive heater energy; heater not working or slow response	error
`866 (32)`	Temp Probe Error (32)	Thermistor pulled from tip or heater broken	error
`866 (33)`	Temp Probe Error (33)	Probe not responsive; not characterized/calibrated	error
`866 (34)`	Temp Probe Error (34)	Probe not characterized/calibrated	error
`866 (45)`	Temp Probe Error (45)	Measurement below allowable values and far below low ambient limits	warning
`866 (46)`	Temp Probe Error (46)	Measurement above allowable values and far above high ambient limits	warning
`866 (52)`	Temp Probe Error (52)	Temperature probe not characterized/calibrated	error
`866 (63)`	Temp Probe Error (63)	Probe well missing or not installed properly	error
`866 (70)`	Temp Probe Error (70)	Problem reading temperature probe EEPROM	error
`866 (75)`	Temp Probe Error (75)	Problem reading probe EEPROM or probe not factory tested	error
`866 (78)`	Temp Probe Error (78)	Probe error	error
`866 (79)`	Temp Probe Error (79)	Module memory error	error
`866 (80)`	Temp Probe Error (80)	Software trying to turn off probe heater but feedback says still on	error
`866 (81)`	Temp Probe Error (81)	Software trying to turn on probe heater but feedback says still off	error
`867 (24)`	Temp Module Malfunc (24)	Ambient temperature too high	warning
`867 (25)`	Temp Module Malfunc (25)	Ambient temperature too low	warning
`867 (27)`	Temp Module Malfunc (27)	Battery or power supply voltage exceeds maximum value	error
`867 (28)`	Temp Module Malfunc (28)	Battery or power supply voltage below minimum value	error
`867 (47)`	Temp Module Malfunc (47)	Internal calibration resistor (RCAL) on board is damaged	error
`867 (48)`	Temp Module Malfunc (48)	Internal calibration resistor (RCAL) is damaged	error
`867 (49)`	Temp Module Malfunc (49)	Internal circuit validation resistor (PTB) is damaged	error
`867 (50)`	Temp Module Malfunc (50)	Internal circuit validation resistor (PTB) is damaged	error
`867 (51)`	Temp Module Malfunc (51)	A/D measurement timed out; did not finish in allowed time slot	error
`867 (59)`	Temp Module Malfunc (59)	Battery or power supply voltage below maximum value	warning
`867 (60)`	Temp Module Malfunc (60)	Battery or power supply voltage exceeds minimum value	warning
`867 (61)`	Temp Module Malfunc (61)	Reference voltage circuit under voltage or unstable	error
`867 (62)`	Temp Module Malfunc (62)	The module is not calibrated	warning
`867 (65)`	Temp Module Malfunc (65)	Problem saving to module EEPROM	error
`867 (66)`	Temp Module Malfunc (66)	Module non-volatile calibration memory error detection	error
`867 (67)`	Temp Module Malfunc (67)	Problem reading/writing to module EEPROM	error
`867 (68)`	Temp Module Malfunction	Problem reading/writing to module EEPROM	error
`867 (69)`	Temp Module Malfunction	Problem reading/writing to module EEPROM	error
`867 (74)`	Temp Module Malfunction	Module initializing EEPROM for first time	warning
`867 (82)`	Temp Module Malfunction	HTR_Q signal on but HTRC signal off with voltage present	error
`867 (83)`	Temp Module Malfunction	HTR_Q tri-stated with HTRC enabled and heater power	error
`867 (84)`	Temp Module Malfunction	Q&C turned on with insufficient heater voltage	error
`867 (85)`	Temp Module Malfunction	Heater fail-safe should have turned off but did not	critical
`868`	Temperature Error	No data from temperature sensor	warning
`881`	Speaker Malfunction	Speaker hardware failure	unknown
`882`	Wireless Malfunction	Wireless firmware cannot load	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.