Surgical tables · Operon family

Berchtold Operon D850: troubleshooting and error codes

The ServiceForge knowledge base holds 19 documented symptoms for the Berchtold Operon D850, with 22 ranked causes, 30 diagnostic checks with test points and expected values, and 60 error codes. Each symptom below shows its causes and the first check; the rest is one connection away. Connect ServiceForge to your AI

Symptoms

Auxiliary pendant switch not responding patient safety

Foot pump handle pull does not activate auxiliary pendant or disable primary hand pendant

Ranked causes

1. Auxiliary pendant switch limit switch stuck or open (unknown)
2. Auxiliary pendant switch cable disconnected (unknown)

First check

Verify foot pump handle movement activates limit switch

Test point: Auxiliary pendant switch output
Expected: Switch closes when foot pump handle is pulled out

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

Low or critical battery charge

Yellow, red steady, or red flashing BATTERY LED indicator on hand pendant; charge status degraded or critical

Ranked causes

1. Battery charge depleted or low (common)
2. Pump motor disabled by low battery (occasional)

First check

Observe BATTERY LED indicator color and state

Test point: BATTERY LED on primary or auxiliary hand pendant
Expected: Green (full to medium), yellow (low), red steady (recharge), or red flashing (critical)

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

Slide sensor output out of range

Software reads slide sensor voltage outside expected 0.5–4.5 VDC range, indicating table position not correctly sensed

Ranked causes

1. Slide sensor potentiometer open or shorted (unknown)
2. Slide sensor cable disconnected or damaged (unknown)

First check

Measure slide sensor output voltage at software interface

Test point: Slide sensor output
Expected: 0.5 to 4.5 VDC depending on table position, 0.5 to 4.5 VDC

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

Auxiliary pendant is active

Amber flashing AUX. PENDANT indicator on primary hand pendant; primary control is disabled

Ranked causes

1. Auxiliary hand pendant activated (common)

First check

Verify auxiliary pendant is in use or activated

Test point: Auxiliary hand pendant
Expected: Auxiliary pendant active or in operator hands

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

Auxiliary pendant not activating

CPU does not provide power to auxiliary pendant or turn off primary hand pendant when foot pump handle is pulled out

Ranked causes

1. Auxiliary pendant switch not detecting foot pump handle pulled out (common)

First check

Verify auxiliary pendant switch responds to foot pump handle pull-out

Test point: Auxiliary pendant switch inside base
Expected: Switch signals CPU when handle pulled out

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

Auxiliary pendant not powering on when foot pump pulled patient safety

Auxiliary pendant does not receive power when foot pump handle is pulled out; primary hand pendant continues active

Ranked causes

1. Auxiliary pendant drawer switch defective or misaligned (unknown)

First check

Verify auxiliary pendant switch actuation

Test point: Auxiliary pendant drawer switch contacts
Expected: Switch closes when foot pump handle is pulled out
Tools: Continuity tester or multimeter

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

Calibration: Backlight sleep time delay

Configure the time delay after last use until backlight enters sleep mode while controls remain active

Ranked causes

1. Backlight sleep time delay configuration (unknown)

First check

Configure backlight sleep time for battery conservation

Test point: Service Program backlight setting slider
Expected: Time in full minutes; longer delays reduce battery life impact minimally

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

Calibration: Battery voltage threshold limits

Verify battery voltage level indicators and LED status transitions at defined thresholds

Ranked causes

1. Battery voltage monitoring requires threshold calibration (unknown)

First check

Monitor LED state at 10% battery level threshold

Test point: Hand pendant LED
Expected: Steady Red V

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

Calibration: Hand pendant backlight sleep time

Configure sleep mode timing for backlight only while controls remain active

Ranked causes

1. Backlight sleep time delay configuration required (unknown)

First check

Verify backlight sleep mode operation

Test point: Hand pendant backlight
Expected: Backlight goes out but controls remain active after configured delay

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

Calibration: hand pendant backlight sleep time delay

Configure the duration after last use until pendant backlight enters sleep mode (backlight off only; controls remain active). Affects battery charge retention with minimal impact.

Ranked causes

1. Backlight sleep time setting adjustment required (unknown)

First check

Verify backlight sleep time delay setting

Test point: Service program backlight sleep parameter
Expected: User preference dependent

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

Calibration: Sleep time delay

Configure hand pendant sleep mode timing and backlight timeout via Service Program shutdown settings

Ranked causes

1. User preference and procedure type determine optimal sleep delay (unknown)

First check

Access shutdown settings in Service Program

Test point: Shutdown Screen
Expected: Sleep time delay adjustment slider visible

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

Calibration: table level position using primary pendant

Set the level position of the surgical table sections using the primary hand pendant to desired position reference point.

Ranked causes

1. Level position setting required (unknown)

First check

Position table to desired level

Test point: Table articulation sections
Expected: Desired level position achieved

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

Hand pendant control failure or inactive

POWER indicator is not green, backlight off, or pendant not responding to input; pendant inactive or failed

Ranked causes

1. Primary pendant failed or lost power (occasional)

First check

Verify POWER indicator status on primary hand pendant

Test point: POWER LED on primary hand pendant
Expected: Green LED lit indicating pendant is active

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

Height sensor malfunction

Software receives incorrect height position readings outside expected 0 to 5 VDC range

Ranked causes

1. Height sensor DC potentiometer failure or improper adjustment (unknown)

First check

Measure height sensor output voltage at minimum height position

Test point: Height sensor output
Expected: 0 VDC
Tools: DMM

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

Height sensor out of calibration

Height sensor voltage reading deviates from expected range during table height adjustment

Ranked causes

1. Height sensor potentiometer drift or cable issue (unknown)

First check

Measure height sensor voltage output

Test point: Height sensor output
Expected: 0 to 5 VDC across full height range, 0 to 5 VDC
Tools: Voltmeter or DMM

Movement limit reached caution

Amber flashing TABLE LIMIT indicator on primary hand pendant; commanded movement has reached software limit

Ranked causes

1. Software-controlled movement limit engaged (common)

First check

Check table articulation command and direction

Test point: Primary hand pendant control position
Expected: Limit indicator flashing when command issued

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

Slide sensor malfunction

Software receives incorrect slide position readings outside expected 0.5 to 4.5 VDC range or table top not centered at 1.5 VDC nominal

Ranked causes

1. Slide sensor DC potentiometer failure or improper adjustment (unknown)

First check

Measure slide sensor output voltage at extreme forward position

Test point: Slide sensor output
Expected: 0.5 VDC
Tools: DMM

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

Slide sensor out of calibration

Slide sensor voltage reading deviates from nominal 1.5 VDC when table top is centered over column

Ranked causes

1. Slide sensor potentiometer drift or misalignment (unknown)

First check

Measure slide sensor voltage output

Test point: Slide sensor output
Expected: 1.5 VDC at table top centered position; 0.5 VDC at extreme forward; 4.5 VDC at extreme reverse, ±0.5 VDC nominal
Tools: Voltmeter or DMM

Table malfunction indicator displayed caution

Red SERVICE indicator lit on primary hand pendant showing table fault; most functions may still work

Ranked causes

1. Table circuit or component malfunction (unknown)

First check

Observe SERVICE indicator on primary hand pendant

Test point: Primary hand pendant SERVICE indicator
Expected: Red indicator lit

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

Error codes

Code	Meaning	Trigger	Severity
`0-31 Sensor`	Sensor fault	Sensor malfunction detected	error
`0-31 Sensor:2`	Sensor fault	Sensor output out of range or disconnected	error
`0-31 Sensor fault (2)`	Sensor fault detected	Sensor malfunction or wiring issue	error
`0-31 Valve`	Valve overload	Valve drawing excessive current	error
`0-31 Valve`	Valve disconnected line	Valve signal line is disconnected	error
`0-31 Valve`	Valve short circuit to ground	Valve shorted to ground	error
`0-31 Valve:4`	Valve disconnected line	Valve line disconnected or open circuit	error
`0-31 Valve:5`	Valve overload	Valve current exceeds limit	error
`0-31 Valve:6`	Valve short circuit to ground	Valve output shorted to ground	critical
`0-31 Valve Disconnected`	Valve disconnected line	Valve line disconnected	error
`0-31 Valve disconnected line (4)`	Valve disconnected line detected	Valve line disconnected or wiring failure	error
`0-31 Valve Overload`	Valve overload	Valve overload condition	error
`0-31 Valve overload (5)`	Valve overload condition	Valve load exceeds normal operation	error
`0-31 Valve Short`	Valve short circuit to ground	Short circuit to ground detected	error
`0-31 Valve short circuit (6)`	Valve short circuit to ground	Short circuit detected in valve circuit	error
`1`	MCU Program memory checksum error	Microcontroller detects program memory checksum mismatch on power-up or during operation	critical
`10`	MCU Internal Error 5 (Program Logic Control)	Microcontroller detects fifth type of internal program logic error	critical
`1-3`	Motor overload	Motor draws excessive current	error
`1-3 Motor`	Motor disconnected line	Motor wiring disconnected or open	error
`1-3 Motor:7`	Motor disconnected line	Motor line disconnected or open circuit	error
`1-3 Motor Disconnected`	Motor disconnected line	Motor line disconnected	error
`1-3 Motor disconnected line (7)`	Motor disconnected line detected	Motor line disconnected or wiring failure	error
`1-3 (Motor name) 8`	Motor overload	Motor current exceeded safe limits	error
`14`	MCU ACCU fault (disconnected)	Microcontroller detects battery disconnection or charging circuit failure	error
`1-42`	Keypad or pedal fault	Keypad or foot pedal malfunction detected	error
`1-42 (Keypad or pedal) 9`	Keypad or pedal fault	Fault in keypad or foot pedal circuit	error
`18`	MCU 24V fault	Microcontroller detects 24V power supply malfunction	error
`19`	7.5VP fault	Shortcut in 7.5VP circuit or damaged U2/Q3	error
`19:1`	7.5VP fault	Shortcut in 7.5VP circuit detected	critical
`19:2`	7.5VP fault - damaged components	U2 or Q3 damaged; impossible to run 7.5VP	critical
`2`	MCU RAM memory fault	Microcontroller detects RAM memory malfunction	critical
`20`	MCU 5VP fault	5V power supply failure detected	error
`20:1`	5VP fault	Shortcut in 5VP circuit detected	critical
`20:2`	5VP fault - damaged/circuit problem	Damaged U4 or problem in 7.5VP circuit	critical
`3`	MCU EEPROM fault	Microcontroller detects EEPROM memory malfunction	critical
`4`	MCU Real Time Clock fault	Microcontroller detects RTC (U21 chip) malfunction	critical
`58`	Communication command Reset	Reset command received	info
`58:1`	MCU: Communication command reset	Communication command reset received	info
`59`	RESET instruction executed	MCU reset instruction execution	info
`59:1`	MCU: RESET instruction executed	MCU self restart	info
`6`	MCU Internal Error 1 (Program Logic Control)	Microcontroller detects internal program logic control error	critical
`60`	Unexpected WDT timeout	Watchdog timer timeout occurred unexpectedly	error
`60:1`	MCU: Unexpected WDT timeout	Watchdog timer unexpected timeout	error
`61`	Unexpected Brown-out-reset	MCU low power supply detected	warning
`61:1`	MCU: Unexpected Brown-out-reset	Power supply voltage dropped	error
`62`	Stack overflow or underflow	Stack memory violation	error
`62:1`	MCU: Stack overflow/underflow	Stack overflow or underflow detected	critical
`63`	Undefined reset condition	Undefined reset condition after programming and disconnecting programmer	info
`63:1`	MCU: Undefined reset condition	Undefined reset after programming and disconnecting programmer	info
`64`	Power Up (First time ON)	System powered on for the first time	info
`64:1`	MCU: Power Up (first time ON)	First power-up of device	info
`7`	MCU Internal Error 2 (Program Logic Control)	Microcontroller detects second type of internal program logic error	critical
`8`	MCU Internal Error 3 (Program Logic Control)	Microcontroller detects third type of internal program logic error	critical
`9`	MCU Internal Error 4 (Program Logic Control)	Microcontroller detects fourth type of internal program logic error	critical
`Battery LED Limit 10%`	Battery charge at 10% capacity	Battery voltage drops to threshold	warning
`Battery LED Limit 30%`	Battery charge at 30% capacity	Battery voltage drops to threshold	warning
`Battery LED Limit 90%`	Battery charge at 90% capacity	Battery voltage rises to threshold	info
`Battery Limit 10%`	Battery charge at 10% capacity	Battery voltage drops to 21.4V	warning
`Battery Limit 30%`	Battery charge at 30% capacity	Battery voltage drops to 22.7V	warning
`Battery Limit 90%`	Battery charge at 90% capacity	Battery voltage rises to 23.5V	info

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.