Operating tables

Steris C-MAX: troubleshooting and error codes

The ServiceForge knowledge base holds 11 documented symptoms for the Steris C-MAX, with 19 ranked causes, 49 diagnostic checks with test points and expected values, and 22 error codes. Each symptom below shows its causes and the first check; the rest is one connection away. Connect ServiceForge to your AI

Symptoms

No movement in any axis patient safety

Table motors do not respond to hand control input; no hydraulic movement

Ranked causes

1. Batteries totally discharged (common)
2. Main hand control cord defective (occasional)
3. Main hand control defective (occasional)
4. Electric pump or electronic mother board defective (rare)

First check

Check battery charge level

Test point: Battery indicator or voltage
Expected: Batteries charged

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

Table remains on battery power when mains connected

Unit does not switch to mains power even when mains cord is properly connected

Ranked causes

1. Wrong mains cord connection (common)
2. Mains cord defective (occasional)
3. Mains fuses blown (occasional)
4. Mains switch is off (common)

First check

Verify mains cord connection

Test point: Mains power inlet connector
Expected: Cord fully inserted and seated

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

Hand control LCD shows key symbol caution

Key symbol appears in LCD status indicator window indicating default or service required condition

Ranked causes

1. Default detected on table systems (unknown)
2. Service required (unknown)

First check

Observe LCD indicator window

Test point: LCD status indicator
Expected: No key symbol when table ready

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

Table cannot turn on

Unit fails to power up when power button pressed

Ranked causes

1. Main battery fuse blown (common)
2. Main hand control defective (occasional)

First check

Check battery fuse

Test point: Main battery fuse
Expected: Fuse intact

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

Battery fuse blown caution

Table does not power on or loses battery backup power; fuse needs replacement

Ranked causes

1. Battery fuse open or blown (common)

First check

Visual inspection of fuse

Test point: Battery fuse cap at foot end of table
Expected: Fuse intact with no visible break or discoloration

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

Calibration: Sliding sensor level adjustment

After replacing the sliding sensor on the seat section, the table level requires adjustment to restore proper operation.

Ranked causes

1. Sliding sensor replaced or repositioned (common)

First check

Level the operating table

Test point: table position
Expected: level position, slide head maximum

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

Main hand control cable malfunction

Cable connection issues affecting control functions or display

Ranked causes

1. Faulty or loose main hand control cable (unknown)

First check

Inspect cable connection at hand control connector

Test point: Hand control connector
Expected: Cable fully seated and connector lock engaged

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

Main hand control malfunction

Buttons, ALS function, or LCD display not responding or not working correctly

Ranked causes

1. Faulty main hand control unit (unknown)

First check

Inspect connector lock for proper engagement

Test point: Main hand control connector
Expected: Connector lock properly seated

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

Mains fuse replacement high voltage

Procedure to replace defective mains fuse(s) on the operating table power supply.

Ranked causes

1. Defective mains fuse(s) (unknown)

First check

Switch mains to OFF

Test point: Main power switch
Expected: OFF position

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

Motherboard replacement required

Operating table requires CPU/motherboard replacement or maintenance

Ranked causes

1. Motherboard failure or scheduled maintenance (unknown)

First check

Raise table to maximum height

Test point: Table height control
Expected: Table at maximum height

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

Sliding motor requires replacement caution

Sliding motor malfunction or failure requiring complete motor unit replacement on C-MAX operating table

Ranked causes

1. Sliding motor failure or malfunction (unknown)

First check

Level the table

Test point: Table bed
Expected: Level position

10 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
`1 KEY ONLY`	Two buttons pressed simultaneously	Two buttons pressed at the same time	info
`BAD VERSION`	Hand control software version incompatible with motherboard	Hand control firmware version does not match motherboard firmware	critical
`BATT DEF`	Battery voltage difference exceeds 0.6V	Voltage difference between two batteries exceeds 0.6V	warning
`BATT FUSE`	Battery fuse not installed or blown	Battery fuse missing or blown	warning
`CHARGER DEF`	Battery charger malfunction or fuse F1 blown	Charger malfunction or fuse F1 blown	warning
`DUAL COMMANDE`	Commands from foot pedal and hand control simultaneously	Controls sent from foot pedal and hand control at same time	info
`LOCK AGAIN`	Pressure switch status unchanged after floor lock operation	Pressure switch status does not change after floor lock or change operation	warning
`MOTOR DEF`	No sliding motor control signal	Sliding motor control signal not detected	error
`MOTOR FAIL`	Sliding motor power always on	Sliding motor power control remains constantly on	error
`PLUGS MAINS`	Battery voltage below 19V	Battery voltage drops below 19V threshold	warning
`POWER DEF`	Mains transformer overheated or fuse F2 blown	Mains transformer over-temperature or fuse F2 blown	warning
`PUMP DEF`	No hydraulic pump control signal	Pump control signal not detected	error
`PUMP FAIL`	Hydraulic pump always controlled	Pump power control always active	critical
`REV ORIENT`	Flex and Reflex movements forbidden in reverse orientation	Operator attempts flex/reflex movements in reverse orientation	info
`SENSOR DEF`	Sensor voltage out of range (0.3V to 4.7V)	Sensor voltage measured outside 0.3V to 4.7V range	warning
`SENSOR FAIL`	Sensor voltage differs from motherboard expected value	Sensor voltage differs from motherboard-expected value	warning
`SLIDE DEF`	No sliding mechanism control signal	Sliding mechanism control signal not detected	error
`SLIDE FAIL`	Sliding mechanism always controlled	Sliding mechanism control always active	error
`VALVE DEF`	No valve control signal detected	Valve control signal not detected	error
`VALVE FAIL`	Valve control always active	Valve control always active	critical
`VOLTAGE PEAK`	Battery voltage reached 31V	Battery voltage rises to 31V	critical
`WRONG USE`	Button held for more than 1 minute	Button pressed and held for more than 1 minute	warning

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.