Hospital beds

Hill-Rom Advance: troubleshooting and error codes

The ServiceForge knowledge base holds 82 documented symptoms for the Hill-Rom Advance, with 192 ranked causes, 302 diagnostic checks with test points and expected values, and 17 error codes. Each symptom below shows its causes and the first check; the rest is one connection away. Connect ServiceForge to your AI

Symptoms

DynamicAire sleep surface will not operate patient safety

Mattress does not respond to inflate/deflate commands; excessive airloss LED may be illuminated at nurse control console

Ranked causes

1. Air system power switch OFF or incorrect position (common)
2. Air compressor defective or not running (occasional)
3. Solenoid defective or inoperative (occasional)
4. Air intake manifold or pop-off valve defective; hose failure (occasional)
5. Air system P.C. board defective (occasional)
6. Sleep surface control board defective (occasional)
7. Top bladder system malfunction or deflate switch defective (occasional)
8. Firm or soft control switch defective (rare)

First check

Verify excessive airloss LED status at nurse control console

Test point: Nurse control console LED indicator
Expected: LED is OFF (no excessive airloss)

19 more checks with pass and fail actions, 15 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Head section will not raise high voltage

Head section does not raise when head up switch is activated

Ranked causes

1. Head section mechanically stuck or binding (common)
2. Head up switch or wiring defective (occasional)
3. Head up limit switch or wiring defective (occasional)
4. Logic control board defective (occasional)
5. Head motor defective (occasional)
6. Head drive defective (occasional)
7. Head capacitor defective (occasional)
8. High voltage control board defective (occasional)

First check

Manually crank head section and test electrical operation

Test point: Head section pivot
Expected: Head section begins to raise from main frame when cranked

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

ZoneAire Sleep Surface continuous run caution

Sleep surface air bladder continuously inflated or fails to deflate; error code 2-2 displayed

Ranked causes

1. Pinched or disconnected air hoses (common)
2. Holes in mattress bladders (common)
3. Incorrect hose connections (occasional)
4. Flow direction valve malfunction (occasional)
5. Sensor control board connector problem (occasional)
6. Bed sensor cable issue (occasional)
7. Air control board failure (rare)
8. Sensor control board failure (rare)

First check

Inspect mattress air hoses

Test point: All visible air hoses on sleep surface
Expected: No pinching, disconnection, or visible damage

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

Head hilow will not lower

Head section of hilow does not lower when bed down switch is activated

Ranked causes

1. Switch or wiring to switch is defective (common)
2. Head hilow limit switch or wiring to limit switch is defective (common)
3. Logic control board is defective (occasional)
4. High voltage control board is defective (occasional)
5. Hilow head motor is defective (occasional)
6. Hilow head capacitor is defective (occasional)
7. Hilow head drive is defective (rare)

First check

Measure DC voltage at J/P200 pins 12 (black) and 10 (red) when switch activated

Test point: J/P200 pin 12 and pin 10
Expected: between +3 and +6V DC, +3 to +6V
Tools: VOM

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

Head hilow will not raise high voltage

Head section of hilow does not raise when bed up switch is activated

Ranked causes

1. Switch or wiring to switch is defective (common)
2. Head hilow switch or wiring to head hilow switch is defective (common)
3. Logic control board is defective (occasional)
4. High voltage control board is defective (occasional)
5. Hilow head motor is defective (occasional)
6. Hilow head capacitor is defective (occasional)
7. Hilow head drive is defective (rare)

First check

Measure voltage at J/P200 pins 12 and 11 with bed up switch activated

Test point: J/P200 pin 12 (black probe), pin 11 (red probe)
Expected: between +3 and +6V DC, +3 to +6V DC
Tools: VOM set to V DC

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

Knee section will not lower high voltage

Knee section does not lower when foot down switch is activated

Ranked causes

1. Switch or wiring to switch is defective (unknown)
2. Knee limit switch or wiring to limit switch is defective (unknown)
3. Logic control board is defective (unknown)
4. Knee drive is defective (unknown)
5. High voltage control board is defective (unknown)
6. Knee motor is defective (unknown)
7. Knee capacitor is defective (unknown)

First check

Measure AC voltage at knee drive control

Test point: J/P3 pin 4 (black) to pin 7 (red)
Expected: approximately 120V AC when switch is activated
Tools: VOM set to V AC

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

ZoneAire Sleep Surface Does Not Work high voltage

ZoneAire air mattress system does not function when bed is powered on

Ranked causes

1. Air control board LED Q7 not flashing (unknown)
2. LON cable disconnected or defective (unknown)
3. MF Bednet cable disconnected or defective (unknown)
4. Footboard control panel defective (unknown)
5. Air control board defective (unknown)
6. CPR switch assembly defective (unknown)
7. Power supply board defective or power loss to board (unknown)

First check

Verify LED Q7 status on air control board

Test point: LED Q7 on air control board (see figure 2-25)
Expected: LED Q7 flashing

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

ZoneAire sleep surface triac open - Error Code 2-6 patient safety

Error 2-6 displayed on control panel; air system self-diagnostic shows abnormal LED patterns; sleep surface malfunction

Ranked causes

1. Mattress cable disconnected or defective (common)
2. Transformer wiring assembly broken, damaged, or loose connector J/P118 (occasional)
3. Air control board failure (occasional)
4. Blown fuse F2 on air control board (occasional)
5. Power supply board failure or blown fuse F2 (occasional)
6. Power cable failure or connection issue (occasional)
7. Air control board wiring assembly disconnected or damaged (occasional)

First check

Run Air System Self Diagnostic Test with mattress cable disconnected

Test point: Sleep surface LEDs
Expected: First 6 LEDs flash (PRESSURE RELIEF, HEEL RELIEF 1-3, COMFORT, FIRMER); last 2 LEDs off

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

Foot hilow will not lower high voltage

Foot section of hilow does not lower when bed down switch is activated

Ranked causes

1. Switch or wiring to switch defective (common)
2. Foot hilow limit switch or wiring to limit switch defective (common)
3. Logic control board defective (occasional)
4. Hilow foot drive defective (rare)
5. High voltage control board or hilow foot motor defective (occasional)
6. Hilow foot capacitor defective (occasional)

First check

Measure DC voltage at switch connector

Test point: J/P200 pin 12 (black) to pin 10 (red)
Expected: between +3 and +6V DC when switch activated, +3 to +6V
Tools: VOM

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

Foot hilow will not raise high voltage

The foot section of the hilow will not raise when the bed up switch is activated.

Ranked causes

1. Switch or wiring to switch is defective (unknown)
2. Foot hilow limit switch or wiring to limit switch is defective (unknown)
3. Logic control board is defective (unknown)
4. Hilow foot drive is defective (unknown)
5. High voltage control board or hilow foot motor is defective (unknown)
6. Hilow foot capacitor is defective (unknown)

First check

Measure DC voltage at J/P200 pins 11-12

Test point: J/P200, black probe pin 12, red probe pin 11
Expected: between +3 and +6V DC when switch is activated, +3 to +6V DC
Tools: VOM

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

Head section will not lower high voltage

Head section does not lower when head down switch is activated

Ranked causes

1. Switch or wiring to switch is defective (unknown)
2. Head down limit switch or wiring to limit switch is defective (unknown)
3. Logic control board is defective (unknown)
4. Head drive is defective (unknown)
5. High voltage control board or head motor is defective (unknown)
6. Head capacitor is defective (unknown)

First check

Measure DC voltage at J/P200 when head down switch is activated

Test point: J/P200 pin 12 (black) to pin 8 (red)
Expected: between +3 and +6V DC, +3 to +6
Tools: VOM set to V DC

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

Knee section will not raise high voltage

Knee section does not raise when foot up switch is activated

Ranked causes

1. Switch or wiring to switch defective (common)
2. Knee limit switch or wiring to limit switch defective (common)
3. Logic control board defective (occasional)
4. Knee drive defective (occasional)
5. High voltage control board or knee motor defective (occasional)
6. Knee capacitor defective (occasional)

First check

Measure voltage at switch signal

Test point: J/P200 pins 12 and 7
Expected: between +3 and +6V DC when switch activated, +3 to +6V DC
Tools: VOM set to V DC

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

ZoneAire Sleep Surface Sensor EEPROM error caution

Sleep surface control circuit detects faulty reading from pressure sensing circuit

Ranked causes

1. Damaged main cable connector or pins (common)
2. Faulty main cable (occasional)
3. Sensor board connector damage (occasional)
4. Air control board connector damage (occasional)
5. Faulty air control board (rare)
6. Faulty sensor board (rare)

First check

Inspect main cable connector and pins

Test point: Main cable connector (A) under foot section
Expected: All pins present, straight, and fully inserted

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

Night light will not operate

Night light does not turn on when activated

Ranked causes

1. Night light switch not in ON position (common)
2. Sensor control not adjusted properly (common)
3. Night light bulb burned out (occasional)
4. High voltage control board defective (rare)
5. Night light board or sensor wiring defective (rare)

First check

Verify night light switch position

Test point: Electronics pan assembly night light switch
Expected: ON position

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

ZoneAire sleep surface mattress disconnected high voltage

Error code 2-5 displayed; electrical connection between control circuit and pressure sensing circuit is disconnected

Ranked causes

1. Bent or recessed connector pins at main connector or P131/P114 (common)
2. Air control board failure (occasional)
3. Mattress cable discontinuity (occasional)
4. Mattress sensor control board failure (occasional)

First check

Inspect connectors for pin damage

Test point: Main connector (A), P131, P114
Expected: No bent or recessed pins

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

Bed function logic voltage out of tolerance caution

VOM measurement shows voltage outside +3 to +6V DC range when bed function switch is activated, indicating switch, logic circuit, or wiring fault

Ranked causes

1. P.C. board defective (common)
2. Switch defective (occasional)
3. Wiring or logic circuit defective (occasional)

First check

Measure knee down (KD) logic voltage

Test point: J/P200 testport cable
Expected: +3 to +6V DC when knee down switch activated, +3 to +6V
Tools: VOM; place black probe at pin 21 for bed power checks

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

Foot section will not lower with Reverse Trendelenburg switch activated patient safety

Foot hilow motor does not operate when Reverse Trendelenburg switch is activated, despite other bed functions working

Ranked causes

1. Head or knee section not completely flat (common)
2. Foot hilow motor defect or control issue (occasional)
3. Nurse control wiring defective or logic control board defective (occasional)

First check

Verify head and knee sleep surfaces position

Test point: Head and knee sections
Expected: Completely flat

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

Head section will not lower with Trendelenburg switch activated patient safety

Head hilow motor does not operate when Trendelenburg switch is activated; bed remains in non-flat position.

Ranked causes

1. Head or knee section not completely flat (common)
2. Head section does not operate with bed down switch (common)
3. Voltage not present at J/P39 connector when switch activated (occasional)

First check

Verify head and knee sleep surfaces are completely flat

Test point: Head and knee sections
Expected: Completely flat position

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

Scale out of calibration or erratic/no readings patient safety

Load cell scale readings are inaccurate, fluctuating, or not displaying; bed does not weigh patients correctly

Ranked causes

1. Load cell overload stop adjustment too loose or tight (common)
2. Load cell removed or replaced recently (common)
3. Analog board removed or replaced (common)

First check

Measure overload stop gap at head end

Test point: Head end gap (H)
Expected: 0.021" minimum and 0.033" maximum inches, 0.021 to 0.033 inches
Tools: Feeler gauge

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

SERVICE REQUIRED LED flashing: 2 long, 7 short

Footboard control panel connection or network cable fault

Ranked causes

1. Footboard control panel disconnected (common)
2. Defective network cable (occasional)
3. Defective system in ZoneAire Sleep Surface (occasional)

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

Siderail controls malfunction

Siderail system not responding correctly to control activation; may affect one or both siderails

Ranked causes

1. Defective function switch or damaged connection (common)
2. One siderail switch failed in closed position or shorted to ground (occasional)
3. Footboard assembly malfunction (occasional)

First check

Activate siderail controls and observe response

Test point: Siderail control switches
Expected: Siderails respond to activation commands

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

ZoneAire Sleep Surface Slow Leak—Error Code 2-1 patient safety

Air mattress leaks slowly; error code 2-1 displayed by bed; may be detected in auto firm mode

Ranked causes

1. Leaking air hose connections (common)
2. Leaking mattress bladder or seams (occasional)
3. Air control board failure (rare)

First check

Feel around mattress air hose connections and along hose length for obvious leaks

Test point: Air hose connections and length
Expected: No leaks detected

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

Calibration: Electronics Pan Assembly reassembly high voltage

Procedure to reassemble the electronics pan assembly and restore the bed to operational status after service or maintenance

Ranked causes

1. Reassembly required after service completion (common)
2. Cable tie may require reinstallation after removal (occasional)

First check

Reconnect night light sensor connector D

Test point: Connector D
Expected: Cable connector fully seated

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

Calibration: Electronics Pan Assembly removal and replacement high voltage

Procedure to access mechanical and electrical components by lowering the electronics pan assembly for service and maintenance

Ranked causes

1. Service access required to electronics pan assembly (common)
2. Cable routing precautions during removal (common)

First check

Verify bed is raised to high position

Test point: Bed frame height
Expected: High position achieved using hilow function

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

Electronics pan assembly stuck or difficult to access caution

Assembly cannot be lowered smoothly or is obstructed during removal procedure

Ranked causes

1. Wire tie (C) not removed on first service (occasional)
2. Cable pulled or kinked preventing smooth lowering (occasional)

First check

Inspect for wire tie (C) if first removal

Test point: Interior of electronics pan assembly
Expected: Wire tie visible if assembly has never been removed

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

Foot section will not raise with Trendelenburg switch activated

Foot hilow motor does not operate when Trendelenburg switch is activated, but bed up switch on siderail works

Ranked causes

1. Nurse control wiring or connector wiring defective (unknown)
2. Logic control board defective (unknown)

First check

Press bed up switch on siderail

Test point: siderail bed up switch
Expected: Foot section goes up

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

Head section will not raise with Reverse Trendelenburg switch activated patient safety

Head hilow motor does not operate when Reverse Trendelenburg switch is activated, but head and knee sleep surfaces are completely flat

Ranked causes

1. Head or knee section does not run from siderail when Reverse Trendelenburg switch activated (unknown)
2. Nurse control wiring, connector wiring, or logic control board is defective (unknown)

First check

Verify head and knee sleep surfaces are completely flat

Test point: Head and knee sections
Expected: Completely flat

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

Mattress function voltages out of tolerance caution

LED indicator or VOM measurement shows voltage outside specified range on DynamicAire Sleep Surface mattress functions

Ranked causes

1. P.C. board defective (common)
2. Wiring defective (occasional)

First check

Measure VCC MAT voltage

Test point: J/P200 testport cable
Expected: +4 to +5V DC, +4 to +5V
Tools: VOM

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

Nurse control panel switch inoperative caution

Switch does not respond to actuation or control function fails

Ranked causes

1. Switch failure or internal damage (unknown)
2. Flex circuit damage or delamination (occasional)

First check

Verify switch type before replacement

Test point: Nurse control panel
Expected: Either 8 or 9 toggle switches and 4 momentary switches present

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

Pneumatic hose connections loose or damaged

Pneumatic hose connections not tight or coupling O-rings damaged

Ranked causes

1. O-ring seals damaged or worn (occasional)
2. Pneumatic hose connections not tightened (common)

First check

Inspect pneumatic hose connections for tightness

Test point: all hose fittings and couplings
Expected: Connections tight, no visible leakage or separation

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

Scale displays Err0

Scale alternates between Err0 and dashes; accompanied by error condition

Ranked causes

1. Analog board cable disconnected or defective (common)
2. Analog board is defective (occasional)

First check

Inspect analog board cable connection

Test point: Analog board connector
Expected: Cable fully seated and undamaged

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

SERVICE REQUIRED LED flashing: 1 long, 2 short

Footboard LED indicates stuck key fault with distinct flash pattern

Ranked causes

1. Defective key panel (common)
2. Defective footboard interface PC board (common)

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

SERVICE REQUIRED LED flashing: 1 long, 3 short

Footboard LED indicates changed product number or system configuration mismatch

Ranked causes

1. Footboard moved to different bed (occasional)
2. Defective scale system or surface system (occasional)

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

SERVICE REQUIRED LED flashing: 2 long, 6 short caution

ZoneAire Sleep Surface loss of power or Triac open circuit

Ranked causes

1. Blown fuse (common)
2. Triac open circuit (common)

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

Voltage out of tolerance caution

LED indicators on Four Motor Bed Tester display red or voltage measurements outside specified range indicate circuit board issues or wiring faults

Ranked causes

1. High voltage power control board defective (common)
2. Wiring or P.C. board defective (occasional)

First check

Measure VCC voltage

Test point: J/P200 testport cable
Expected: +4 to +5V DC, +4 to +5V
Tools: VOM, fine tip probes recommended

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

Air control board component damage warning caution

Risk of equipment damage during air control board service

Ranked causes

1. Improper handling of P.C. board components (common)

First check

Verify proper P.C. board handling procedures followed

Test point: Work area and technique
Expected: Clean hands, board edges handled, static strap worn

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

Cable assembly damage during removal caution

Control cables can be damaged when removed from footboard control panel

Ranked causes

1. Improper cable handling or excessive force during removal (common)

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

Calibration: Caster brake and steer adjustment

Brake/steer caster on foot end left side and brake caster on head end right side require adjustment for proper locking and steering operation.

Ranked causes

1. Casters require periodic adjustment for brake and steer function (common)

First check

Remove plastic leg covers over brake/steer and brake casters

Test point: Foot end left caster and head end right caster
Expected: Covers removed

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

Calibration: CPR Handle cable gap patient safety

CPR release handle cable requires adjustment to establish proper gap between cable ball stop and latch release bar for correct operation

Ranked causes

1. Cable ball stop gap out of specification (unknown)

First check

Measure gap between cable ball stop and latch release bar

Test point: CPR mechanism cable ball stop (B) and latch release bar (A)
Expected: 1/8" gap inches, ±0.03125 inches
Tools: 1/2" open end wrenches

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

Calibration: DynamicAire Sleep Surface P.C. Board removal and replacement high voltage

Procedural steps for removing and replacing the DynamicAire Sleep Surface P.C. Board from the Advance bed frame.

Ranked causes

1. Board removal and replacement required (unknown)

First check

Raise bed to high position

Test point: Bed frame position
Expected: Bed at maximum height

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

Calibration: DynamicAire Sleep Surface Solenoid replacement—old style high voltage

Procedure to remove and replace an inoperative solenoid on the DynamicAire sleep surface manifold

Ranked causes

1. Inoperative solenoid on DynamicAire sleep surface manifold (unknown)

First check

Raise bed to high position

Test point: Hilow function
Expected: Bed at high position

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

Calibration: Head limit switch caution

Adjustment and alignment of head limit switch assembly after installation to ensure proper CPR latch actuation and switch operation.

Ranked causes

1. Head limit switch requires adjustment after installation (common)

First check

Identify limit switch package type

Test point: Limit switch assembly visual inspection
Expected: Match to one of configurations shown in figure 4-57

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

Calibration: Head section reset patient safety

Head section may not operate after raising and lowering while CPR release held activated

Ranked causes

1. Head section motor requires reset after CPR release operation (common)

First check

No patient in bed: manually lift head section to high position

Test point: Head section
Expected: Click heard when reaching high position

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

Calibration: Hilow foot limit switch caution

Alignment of limit switch slide and drive boots during hilow foot screw assembly installation to prevent equipment damage

Ranked causes

1. Misalignment of limit switch slide and drive boots during installation (common)

First check

Limit switch slide alignment with drive boots

Test point: Limit switch slide and drive boots on lift nut and torque cage
Expected: Aligned position as fastened to lift nut and torque cage

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

Calibration: Hilow foot limit switch tab alignment caution

Adjust tab and slot orientation on hilow foot limit switch package after installation or replacement on Advance bed

Ranked causes

1. Limit switch tabs require alignment after installation (common)

First check

Determine limit switch package version by comparing to figure 4-57

Test point: Visual identification of package type
Expected: Package matches 'A', 'B', 'C', 'E', or 'F' version configuration

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

Calibration: Hilow Head Limit Switch patient safety

Adjustment and installation of hilow head limit switch assembly on Advance hospital bed for correct head-end positioning

Ranked causes

1. Hilow head limit switch requires alignment and positioning after replacement (common)

First check

Identify bed version and limit switch package type

Test point: Compare to figure 4-57 on page 4-97
Expected: Correct package type identified per documentation

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

Calibration: Hilow head screw assembly alignment patient safety

Align switch slide and drive boots when installing hilow head drive screw to prevent severe damage to the bed

Ranked causes

1. Switch slide and drive boots misalignment during installation (common)

First check

Support head end of bed with 2x4 blocking

Test point: Between intermediate frame (A) and head lift arm assembly (B)
Expected: Secure blocking placement before lowering hilow

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

Calibration: Knee limit switch alignment caution

Tabs in limit switch package must be centered in slots for proper operation on A, B, C version beds. E and F versions do not require adjustment.

Ranked causes

1. Limit switch tabs misaligned in slots (common)

First check

Verify limit switch package version (A, B, or C)

Test point: Compare to figure 4-57 page 4-97
Expected: Matches one of versions A, B, or C

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

Calibration: Knee screw assembly alignment caution

Limit switch slide, automatic contour switch, and drive boots must be aligned during installation to prevent equipment damage

Ranked causes

1. Improper alignment during knee screw assembly installation (common)

First check

Loosen screw beneath radial bracket (H) approximately 1/8"

Test point: Radial bracket (H)
Expected: Screw loosened approximately 1/8"

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

Calibration: Nurse control panel switch installation caution

Procedure to install and verify proper operation of replacement nurse control panel switch

Ranked causes

1. Scheduled maintenance or switch replacement (common)

First check

Unplug bed from power source

Test point: Power inlet
Expected: Bed unplugged

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

Calibration: Seat section cover removal and replacement high voltage

Procedure to remove and reinstall the cover over the seat section of the Advance bed sleep surface.

Ranked causes

1. Maintenance access required (common)

First check

Mattress removed from sleep surface

Test point: Sleep surface
Expected: Mattress removed per DynamicAire or ZoneAire procedure

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

Calibration: ZoneAire Sleep Surface Air Control P.C. Board replacement high voltage

Procedure to remove and replace the ZoneAire Sleep Surface Air Control P.C. Board in the Advance bed

Ranked causes

1. P.C. Board requires replacement or maintenance (unknown)

First check

Raise bed to high position

Test point: Hilow function
Expected: Bed raised to high position

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

Calibration: ZoneAire Sleep Surface Switching Valve Assembly high voltage

Removal and replacement of the ZoneAire Sleep Surface Switching Valve Assembly

Ranked causes

1. Switching valve assembly requires removal or replacement (unknown)

First check

Raise bed to high position

Test point: Hilow function
Expected: Bed in high position

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

Calibration: ZoneAire Sleep Surface Transformer installation high voltage

New transformer installation and reassembly for ZoneAire Sleep Surface air control system

Ranked causes

1. Transformer installation (unknown)

First check

New transformer positioned correctly

Test point: Air supply module mounting area
Expected: Transformer aligned with mounting holes

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

Calibration: ZoneAire Sleep Surface Transformer replacement high voltage

Transformer removal and replacement procedure for ZoneAire Sleep Surface air control system

Ranked causes

1. Transformer replacement required (unknown)

First check

Bed raised to high position

Test point: Hilow control
Expected: Bed at full height

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

Communication lost between main control and footboard

Footboard control panel flashes code 2, 7 indicating lost communication with main controller

Ranked causes

1. Communication link failure between controllers (unknown)

Footboard control panel configuration error

Service required alarm emits one long, three short flashes indicating control board configured incorrectly for bed features

Ranked causes

1. Control board configuration mismatch with installed bed features (occasional)

First check

Turn off bed motor

Test point: BED MOTOR power switch
Expected: MOTOR POWER OFF LED illuminates

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

Head limit switch replacement caution

Complete removal and replacement procedure for head limit switch assembly including disassembly, new unit installation, and post-installation alignment.

Ranked causes

1. Head limit switch assembly requires replacement (unknown)

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

Head screw assembly misalignment after service caution

Switch slide not properly aligned with limit switch; CPR latch does not actuate limit switch correctly after head screw assembly removal and replacement

Ranked causes

1. Head screw assembly improperly reassembled or limit switch not aligned (common)

First check

Verify switch slide (B) position relative to head limit switch package (I)

Test point: Switch slide (B) and limit switch package (I)
Expected: Switch slide aligned with head limit switch package

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

Head section will not raise when using IV rod

Manual operation with IV rod does not raise head section, only resets mechanism

Ranked causes

1. IV rod manual crank engages mechanical reset only, not lifting (common)

More symptoms

High Voltage Control Board replacement
Hilow head screw assembly removal and replacement
Mechanical components damaged or inoperative
Mechanical components damaged or making unusual noise
Mechanical components producing unusual noise
Scale displays dashes during startup
Scale displays Err1
Scale displays Err2
SERVICE REQUIRED LED flashing: 1 long, 4 short
SERVICE REQUIRED LED flashing: 2 long, 2 short
SERVICE REQUIRED LED flashing: 2 long, 3 short
SERVICE REQUIRED LED flashing: 2 long, 4 short
SERVICE REQUIRED LED flashing: 2 long, 5 short
SERVICE REQUIRED LED flashing: 4 long, 4 short
SideCom Communication System test - siderail switches not responding
SideCom tester NURSE ANSWER button not activating siderail red LEDs
SideCom tester NURSE CALL button not activating siderail amber LEDs
SideCom tester SPEAKER switch not producing audio tone in siderail
Sleep surface area not functioning during diagnostic test
ZoneAire sleep surface energized continuously
ZoneAire sleep surface LED test pattern verification - Error Code 2-6 extended
ZoneAire Sleep Surface LON communication error

22 more symptoms with ranked causes and checks are in ServiceForge. Connect ServiceForge to your AI

Error codes

Code	Meaning	Trigger	Severity
`1-2`	Key stuck in closed position	Membrane interface detects key in closed state when it should be open or key circuit stuck closed	error
`2-1`	ZoneAire Sleep Surface Slow Leak	Air pressure loss detected in sleep surface pneumatic system	warning
`2-3`	ZoneAire Sleep Surface Triac Short	Air control board triac has shorted, valve energized continuously	error
`2-6`	ZoneAire sleep surface triac open circuit; air pump cannot operate through triac switching element	During Air System Self Diagnostic Test after power-on; triac component failure or control signal loss	error
`2-7`	ZoneAire Sleep Surface LON Communication Error	Loss of LON communication between bed modules	error
`2, 7`	Communication lost between main control and footboard panel	Communication link failure detected by footboard controller	error
`AUTO FIRM LED flashing`	Direction flow valve driver on the air board is faulty	During self-diagnostic test, AUTO FIRM LED indicator flashes instead of remaining steady	error
`COMFORT LED flashing`	Heel relief 2 solenoid driver on the air board is faulty	During self-diagnostic test, COMFORT LED indicator flashes instead of remaining steady	error
`Err0`	Analog board cable disconnected or analog board defective	Scale error condition during operation	error
`Err1`	Error occurred during memory check	Memory check failure during power-up	warning
`Err2`	Scale has never been calibrated	Scale power-up without prior calibration	warning
`FIRMER LED flashing`	Heel relief 3 solenoid driver on the air board is faulty	During self-diagnostic test, FIRMER LED indicator flashes instead of remaining steady	error
`HEEL RELIEF 1 LED flashing`	Seat solenoid driver on the air board is faulty	During self-diagnostic test, HEEL RELIEF 1 LED indicator flashes instead of remaining steady	error
`HEEL RELIEF 2 LED flashing`	Knee solenoid driver on the air board is faulty	During self-diagnostic test, HEEL RELIEF 2 LED indicator flashes instead of remaining steady	error
`HEEL RELIEF 3 LED flashing`	Heel relief 1 solenoid driver on the air board is faulty	During self-diagnostic test, HEEL RELIEF 3 LED indicator flashes instead of remaining steady	error
`PRESSURE RELIEF LED flashing`	Head solenoid driver on the air board is faulty	During self-diagnostic test, PRESSURE RELIEF LED indicator flashes instead of remaining steady	error
`SOFTER LED flashing`	Air compressor driver on the air board is faulty	During self-diagnostic test, SOFTER LED indicator flashes instead of remaining steady	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.