Patient care beds · Giraffe OmniBed family

GE Healthcare Giraffe OmniBed Carestation CS1: troubleshooting and error codes

The ServiceForge knowledge base holds 170 documented symptoms for the GE Healthcare Giraffe OmniBed Carestation CS1, with 365 ranked causes, 189 diagnostic checks with test points and expected values, and 62 error codes. Each symptom below shows its causes and the first check; the rest is one connection away. Connect ServiceForge to your AI

Symptoms

System Failure 15 high voltage

Safety Relay 1 test failure; unable to turn heater on or off by switching relay. If SF22 appears during operation, SF15 should appear at startup. Have 50-pin ribbon cable on hand.

Ranked causes

1. J1, J2, J4 not unplugged during calibration or JP1 not installed properly (common)
2. Air temperature sensor above 40C at power-up (occasional)
3. Defective sensor in compartment air probe (occasional)
4. Defective compartment sensor cable (occasional)
5. No output from heater isolation transformer; defective relay board (common)
6. Defective heater isolation transformer (occasional)
7. Defective DAC circuit on control board (occasional)
8. Defective solid state relay (SSR) (occasional)
9. Defective radiant heater SSR (occasional)
10. Defective incubator heater SSR (occasional)
11. Defective current sense circuit on relay board (occasional)
12. Defective 50-pin ribbon cable (occasional)

First check

Verify J1, J2, J4 are disconnected and JP1 is seated

Test point: control board connectors J1, J2, J4 and jumper JP1
Expected: All connectors disconnected; JP1 in correct position per calibration procedure

7 more checks with pass and fail actions, 12 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Device will not power up, alarm sounds patient safety

Device fails to complete power-up sequence and alarm activates

Ranked causes

1. Defective scale (common)
2. Defective scale harness (common)
3. Defective Servo Oxygen board (occasional)
4. Defective Servo Oxygen cable (occasional)
5. Defective PF Battery (occasional)
6. Defective power supply (occasional)
7. Defective power harness to SBC (occasional)
8. Defective SBC (occasional)
9. Defective control board (rare)

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

System Failure 0

Communication error between SBC and control board; alarm may activate if bed up pedal was pressed during power-up or other communication faults occur.

Ranked causes

1. Bed up pedal switch pressed during power-up (occasional)
2. Defective scale (occasional)
3. Defective scale harness (occasional)
4. Defective Servo Oxygen board (occasional)
5. Defective Servo Oxygen cable (occasional)
6. Defective PF Battery (rare)
7. Defective 14 pin ribbon cable (occasional)
8. Defective SBC (rare)
9. Defective control board (rare)

First check

Disconnect scale and power cycle

Test point: probe panel
Expected: System Failure 0 clears

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

System Failure 25: Fan rotation not detected caution

Fan rotation is not being detected by the optical fan sensor during power-up or operation

Ranked causes

1. Fan is not connected (common)
2. Fan or Fan Hub not seated properly (common)
3. Fan turning too slow (occasional)
4. Fan turning at different speed (occasional)
5. Fan turning in wrong direction (rare)
6. Defective Optical Sensor (occasional)
7. Defective Relay Board (occasional)
9. Defective fan motor (rare)

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

Humidity Failure Alarm caution

Alarm indicates humidifier function is disabled; opens safety relay 2

Ranked causes

1. Motor Drive Failure alarm is on (common)
2. Elevating base does not function (common)
3. Humidifier safety thermostat is open (common)
4. Defective humidifier heater or safety thermostat (occasional)
5. No mains voltage at humidifier isolation transformer input (occasional)
6. Defective relay board (occasional)
7. Humidity sensor failed (occasional)

First check

Verify elevating base function

Test point: Elevating base
Expected: Base functions properly

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

System Failure 22: Heater will not turn on during operation caution

During operation, either the radiant heater or the incubator heater will not turn ON

Ranked causes

1. Defective PF Battery (common)
2. Defective scale (occasional)
3. Defective scale harness (occasional)
4. Defective Servo Oxygen board (occasional)
5. Defective Servo Oxygen cable (occasional)
6. Defective audio circuit on control board (rare)
7. Defective control board (rare)

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

Elevating base and canopy will not go up or down patient safety

Mechanical elevation system does not respond to any control input

Ranked causes

1. Pedal switches are disabled on Operator Setup screen or Service screen (common)
2. Defective toroidal transformer (occasional)
3. No mains input to the toroidal transformer (occasional)
4. Defective fuse on relay board (occasional)
5. Defective 50 pin ribbon cable between relay and control board (occasional)
6. Defective relay board (occasional)

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

Low Oxygen patient safety

Sensor1 reading more than 3% below oxygen set point after change or canopy closure

Ranked causes

1. Low O2 supply pressure or flow (common)
2. Air leaks into patient compartment (common)
3. Supply valve not opening (occasional)
4. End cap safety valve not opening (occasional)
5. Calibration valve not closing (occasional)
6. Patient compartment vents occluded (occasional)

First check

Measure O2 supply pressure

Test point: O2 inlet
Expected: >45 psi (310 kPa)
Tools: Pressure gauge

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

Bed heater failure high voltage

Software turned on incubator heater but it is not turning on or current sense circuit not detecting operation. Alarm only activates when canopy is at bottom position.

Ranked causes

1. Bed safety thermostat is open (common)
2. Defective incubator heater, thermostat, or wire harness (occasional)
3. Defective incubator solid state relay (SSR) (occasional)
4. Defective 50-pin ribbon cable between relay and control board (occasional)
5. Defective relay board (rare)

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

System Failure 30: Mains voltage reading outside expected range high voltage

Mains voltage reading LV1 is outside of the expected range for the detected voltage

Ranked causes

1. Mains Voltage Comp Circuit is not calibrated correctly (common)
2. High or low mains voltage (common)
3. Defective 50-pin ribbon cable between relay and control board (occasional)
4. Defective relay board (occasional)
5. Defective control board (rare)

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

ADD WATER message stays on even after water has been added

Water level indicator message remains after refilling water reservoir

Ranked causes

1. Defective reservoir switch (common)
2. Defective 50 pin ribbon cable between relay and control board (occasional)
3. Defective relay board (occasional)
4. Defective control board (rare)

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

Black or Dim Display patient safety

Display is completely black or appears very dark with minimal visible content

Ranked causes

1. LCD Backlight Cable not fully seated (common)
2. Defective LCD Backlight cable (occasional)
3. Defective LCD (occasional)
4. Defective SBC (rare)

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

Canopy will not go up or down with pedal switches or hand switches, elevating base works OK patient safety

Canopy does not respond to any control; base elevation works

Ranked causes

1. Canopy motor turns - Defective belt or clutch (occasional)
2. Canopy motor does not turn - Defective canopy motor (occasional)
3. Canopy motor does not turn - Defective ribbon cable (occasional)
4. Canopy motor does not turn - Defective relay board (occasional)

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

Display stuck on Giraffe logo screen patient safety

Display boots but stays on Giraffe logo screen; alarm LEDs working and high priority alarm active

Ranked causes

1. 14 pin ribbon cable disconnected (common)
2. Defective ribbon cable (occasional)
3. Defective SBC (occasional)
4. Defective Control Board (occasional)

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

Heater Doors Not Closed Alarm caution

Alarm activates as canopy reaches halfway down and heater doors are not both closed

Ranked causes

1. Doors not closing fully (common)
2. Defective switch or harness (occasional)
3. Defective 50-pin ribbon cable between relay and control board (occasional)
4. Defective relay board (occasional)

First check

Verify both heater doors close fully

Test point: Heater doors
Expected: Doors close fully as canopy starts to lower

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

Heater Doors Not Open Alarm caution

Alarm activates as canopy reaches top of travel and heater doors are not both open

Ranked causes

1. Doors not opening fully (common)
2. Defective switch or harness (occasional)
3. Defective 50-pin ribbon cable between relay and control board (occasional)
4. Defective relay board (occasional)

First check

Verify both heater doors open fully

Test point: Heater doors
Expected: Doors open fully when canopy is all the way up

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

In Transition - Heat Off Alarm caution

Alarm remains active when canopy reaches end position; should clear when canopy reaches proper position

Ranked causes

1. Defective rail drive belt (occasional)
2. Spring tube not adjusted correctly (warmer mode) (common)
3. Defective switch or harness (occasional)
4. Canopy not going low enough (incubator mode) (common)

First check

Push canopy up slightly to test switch

Test point: Canopy position
Expected: Switch closes and alarm message clears

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

Left rail assembly damaged or worn caution

Rail assembly exhibits wear, binding, or improper movement during full range of travel

Ranked causes

1. Worn or damaged buoyancy springs (occasional)
2. Worn or damaged rollers (occasional)
3. Damaged or worn roller tensioning spring (occasional)
4. Damaged cable carrier links (occasional)

First check

Inspect buoyancy springs for cracks, corrosion, or loss of tension

Test point: Spring assembly inside lift rail
Expected: Springs intact, full tension when compressed

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

Oxygen Probe Failure patient safety

One sensor reading out of range or difference between sensors >3%

Ranked causes

1. Defective sensor(s) (common)
2. Leak or occlusion in sensor housing (occasional)
3. Defective cable or connection (occasional)
4. Defective servo O2 board (occasional)

First check

Monitor sensor voltage readings

Test point: Servo O2 status screen
Expected: sensor0 and sensor1 both 5-90 mv, readings within 3%, 5-90 mv

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

Oxygen System Failure 1 caution

Sensor thermistor temperature reading out of range 15-55C

Ranked causes

1. Device temperature below 15C (common)
2. Cooling fan not running (occasional)
3. Defective thermistor or cable (occasional)
4. Defective servo O2 board (rare)

First check

Monitor ambient temperature

Expected: Minimum 15C (59F)
Tools: Thermometer

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

Oxygen System Failure 5 patient safety

Check O2 Supply alarm silenced twice; sensor1 still <23%

Ranked causes

1. O2 supply not connected (common)
2. Calibration valve stuck in calibration position (occasional)
3. Supply valves not opening (occasional)
4. Leak or occlusion in sensor housing (occasional)

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

Radiant Heater Failure Alarm high voltage

Software turned on radiant heater but it is not turning on or current sense circuit not detecting operation

Ranked causes

1. Defective radiant heater or wire harness (common)
2. Defective warmer solid state relay (SSR) (occasional)
3. Defective 50-pin ribbon cable between relay and control board (occasional)
4. Defective relay board (occasional)

First check

Measure radiant heater resistance

Test point: Radiant heater 3-pin connector
Expected: Specified resistance value
Tools: Ohmmeter

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

Scale icon does not appear on control panel

Scale icon missing from unit control panel display

Ranked causes

1. Scale not plugged in (common)
2. Defective cable (occasional)
3. Defective printed circuit board (occasional)
4. Defective scale receptacle (rare)

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

System Failure 18: Defective variables caution

Error during system calibration or indicates SRAM circuit failure on control board

Ranked causes

1. Error occurs during System Calibration (common)
2. Defective SSR (occasional)
3. Defective current sense circuit on relay board (occasional)
4. Defective SRAM circuit on control board (rare)

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

User Interface Touch Screen does not function

Touch screen is unresponsive to touch input or does not register contacts

Ranked causes

1. Foreign substance on Touch Screen surface (common)
2. Touch Controller flex cable connection not fully seated (occasional)
3. Touch Controller USB cable connection not fully seated (occasional)
4. Defective Touch Controller (rare)

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

White Display or Distorted Display image patient safety

Display shows white screen or image is distorted/garbled

Ranked causes

1. LCD LVDS Cable not fully seated (common)
2. Defective LCD LVDS cable (occasional)
3. Defective LCD (occasional)
4. Defective SBC (rare)

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

Canopy works in one direction but not the other patient safety

Canopy moves only up or only down; opposite direction does not work

Ranked causes

1. Defective canopy motor (common)
2. Defective 50 pin ribbon cable (occasional)
3. Defective relay board (occasional)

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

Device will not turn on (Power Fail Alarm) patient safety

Unit does not power on; power fail alarm sounds

Ranked causes

1. No AC (common)
2. No 12V DC Power (occasional)
3. Defective Power Supply (occasional)

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

Elevating base will not go up or down, canopy works OK patient safety

Base elevation does not respond; canopy controls function normally

Ranked causes

1. Pedal switches are disabled on Nurse Setup screen or Service screen (common)
2. Defective elevating base motor (occasional)
3. Defective relay board (occasional)

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

Fan failure

Fan rotation is not being detected by optical sensor. System failure 25 triggered at power-up; FAN FAILURE alarm triggered after power tests completed.

Ranked causes

1. Fan is not turning or fan/hub not seated properly (common)
2. Defective fan motor (occasional)
3. Defective relay board (occasional)

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

Hands Free Alarm Silence does not work caution

HFAS feature does not silence alarm when activated

Ranked causes

1. Too much ambient sunlight (common)
2. Defective Alarm Board (occasional)
3. Defective LINCAN Cable (occasional)

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

Heater door does not fully open patient safety

Canopy raised to upper travel limit but heater doors remain partially closed or do not open uniformly

Ranked causes

1. Heater door opening rod position incorrect relative to bracket (common)
2. Door cable insufficient tension or spring tube assembly failure (occasional)
3. Rod positioned too high causing doors to open against mechanical stop with residual 'IN TRANSITION' message (occasional)

First check

Raise canopy to upper travel limit and observe heater door opening

Test point: Heater doors, system display for 'IN TRANSITION' message
Expected: Heater doors fully open; 'IN TRANSITION' message not displayed

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

Heater door misalignment or frame damage caution

Door does not open/close properly, cracked or broken frame, visible gaps between door and canopy

Ranked causes

1. Shoulder screws overtightened during installation (common)
2. Incorrect assembly of door spring spool and cams (common)
3. Heater door bracket not centered relative to canopy (occasional)

First check

Verify heater door assembly sequence

Test point: Door spring spool mechanism
Expected: Components installed in order: white insert, nylon washer, 1st inner cam, lever arm, 2nd outer cam, oversized washer, keeper plate

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

No Power Fail Indicator (Red LED) caution

Red LED power fail indicator does not light up

Ranked causes

1. Display Power cable disconnected (common)
2. Defective Display Power cable (occasional)
3. Defective Alarm Board (occasional)

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

Patient cold condition detected patient safety

Skin temperature probe measures 1.0°C below set temperature (adjustable to 0.5°C); alarm activates when skin temperature alarm enabled

Ranked causes

1. Baby Mode set temperature incorrect for patient (common)
2. Probe disconnected from patient skin (common)
3. Patient is cold (occasional)

First check

Respond per clinical protocol

Test point: Patient temperature
Expected: Within set temperature range

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

Patient hot condition detected patient safety

Skin temperature probe measures 1.0°C above set temperature (adjustable to 0.5°C); alarm activates in Manual Mode when skin temperature alarm enabled

Ranked causes

1. Baby Mode set temperature incorrect for patient (common)
2. External heat such as phototherapy or sunlight (occasional)
3. Skin temperature probe disconnected from patient skin (common)

First check

Respond per clinical protocol

Test point: Patient temperature
Expected: Within set temperature range

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

Power Failure (LED Indicator)

No power to device or 5V power supply failure; indicated by LED

Ranked causes

1. On/Off switch not turned on or cord not plugged in (common)
2. Defective fuse F1 or F2 on relay board (occasional)
3. Defective power supply (occasional)

First check

Verify power cord plugged into live outlet

Test point: Wall outlet and power cord
Expected: AC power present

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

Radiant heater doors do not close completely when canopy is lowered patient safety

Heater doors remain open or do not fully seal when canopy closes

Ranked causes

1. Heater door top seal or bottom seal interferes with doors (common)
2. Heater door arm on spring spool assembly is stuck (occasional)
3. Heater door spring spool assembly pins are touching heater door cable (occasional)

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

RH Sensor Calibration Failed Try Again error patient safety

Calibration failure message indicating RH sensor reading outside expected range or defective component

Ranked causes

1. RH sensor signal outside 65-85% RH range (common)
2. Defective calibration bottle (occasional)
3. Defective RH sensor (occasional)

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

Scale hardware installation issues

Scale not functioning due to improper installation, shipping screws not removed, or cable routing problems

Ranked causes

1. Shipping screws not removed from scale (common)
2. Scale cable routed incorrectly or pinched (occasional)
3. Blankets or covers placed over scale edge (occasional)

First check

Verify shipping screws removed

Test point: Scale assembly - all screw holes
Expected: All 4 shipping screws removed

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

Scale icon disappears and reappears on control panel

Scale icon intermittently present on control panel; scale makes repeated clicking noise

Ranked causes

1. Defective or disconnected cable (common)
2. Defective printed circuit board (occasional)
3. Defective scale receptacle on unit (rare)

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

Screen refreshes every few seconds while scale is attached

Display updates/refreshes rapidly when scale connector is engaged

Ranked causes

1. Defective circuit on control board (unbiased RS485 bus during idle state) (occasional)
2. Defective scale (occasional)
3. Defective scale harness (occasional)

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

System Failure 2

Timer2 circuit running too fast on control board microprocessor, or no line frequency signal to feed timer circuits.

Ranked causes

1. Defective scale (occasional)
2. Defective scale harness (occasional)
3. No line frequency signal or Timer2 is defective (common)

First check

Disconnect scale and power cycle

Test point: probe panel
Expected: System Failure 2 clears

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

System Failure 8 high voltage

No line frequency signal detected on control board; measure signal at J9 pin 43. Should be 120Hz for 60Hz system or 100Hz for 50Hz system.

Ranked causes

1. Defective control board (occasional)
2. Defective 50-pin ribbon cable between relay board and control board (occasional)
3. Defective relay board (occasional)

First check

Measure line frequency signal at J9 pin 43

Test point: J9 pin 43 to TP1-6 (Ground)
Expected: 120Hz for 60Hz system or 100Hz for 50Hz system
Tools: Oscilloscope or frequency counter

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

Bed height pedals disabled alarm

Alarm activates when bed raise or lower pedals are pressed but disabled in Service or Setup screen

Ranked causes

1. Bed pedal disabled in service mode (common)
2. Bed pedal disabled in Setup screen (occasional)

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

Bed raise/lower pedal failure caution

One of the bed raise/lower pedal switches is shorted, preventing normal operation

Ranked causes

1. Defective bed raise/lower pedal switch or harness (common)
2. Defective relay board (occasional)

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

Bed will not lock in tilt position patient safety

Bed cannot be held in tilted position, tilt lock mechanism not functioning

Ranked causes

1. Tilt ball not engaged in finger pocket latch (common)
2. Tilt brake pad failure (occasional)

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

Black Display patient safety

Display screen shows completely black with no visible content

Ranked causes

1. Display Power cable disconnected (common)
2. Defective Display Power cable (occasional)

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

Calibration Failed patient safety

After 5 minutes in calibration mode, sensors not reading 23-55 mV

Ranked causes

1. Calibration valve not opening or fan not on (common)
2. Defective sensors (occasional)

First check

Verify calibration mode activated

Test point: Servo O2 screen, VC control
Expected: Calibration fan audible, VC opens
Tools: Visual/audible

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

Calibration: Humidifier relative humidity sensor

Procedure to calibrate the humidity sensor on the Giraffe OmniBed Carestation CS1 using a saturated salt solution calibration bottle to create a 75% RH reference environment.

Ranked causes

1. Sensor or control board replaced (common)
2. Calibration required during maintenance (occasional)

First check

Attach calibration bottle to humidity sensor

Test point: Humidity sensor on back panel
Expected: Elbow slides over sensor and stops; creates 75% RH environment

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

Canopy does not open or close caution

Foot pedal or membrane control depressed but canopy fails to move; other functions normal

Ranked causes

1. Canopy foot pedal switch failure (unknown)
2. Canopy membrane switch failure (unknown)

First check

Verify foot pedal switch connector is seated

Test point: Canopy pedal switch connector
Expected: Fully connected

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

Canopy motor not responding

Canopy fails to move up or down; hand control and foot control ineffective; motor silent or non-responsive

Ranked causes

1. Canopy motor control signal missing or wrong (common)
2. Canopy roll pin broken or missing (occasional)

First check

Verify canopy control signal

Test point: J37 pins 23,26,24,27
Expected: Raise: 0,0,1,1; Lower: 1,0,0,1
Tools: Multimeter

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

Canopy pedal disabled alarm

Alarm activates when pedal is pressed but has been disabled in Service or Setup screen

Ranked causes

1. Canopy pedal disabled in service mode (common)
2. Canopy pedal disabled in Setup screen (occasional)

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

Canopy pedal failure caution

One of the canopy pedal switches is shorted. Alarm appears about 100 seconds after the short occurs.

Ranked causes

1. Defective canopy pedal switch or harness (common)
2. Defective canopy hand switch or harness (occasional)

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

Canopy position detect inoperable

Canopy status unknown; canopy up, down or middle position not detected by system; relay board shows no switch closure

Ranked causes

1. Canopy detect switch harness defective (common)
2. Canopy detect switch stuck or failed (occasional)

First check

Measure voltage across detect harness pins

Test point: Pin 1 (negative) and pin 4 (positive)
Expected: More than 4.75V, >4.75V
Tools: Multimeter

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

Canopy travels down part way then stops and gives in-transition alarm patient safety

Canopy stalls mid-descent with alarm; heater door switches not indicating closed

Ranked causes

1. Heater door switch(es) malfunctioning (common)
2. Heater door sensor wire harness (6600-0752-700) is loose or damaged (occasional)

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

Chassis cover cannot be removed caution

Chassis cover stuck or screws stripped; storage drawer interferes with removal

Ranked causes

1. Humidifier reservoir in place obstructs removal (common)
2. Drawer positioned incorrectly (common)

First check

Verify humidifier reservoir removed

Test point: Chassis top surface
Expected: Reservoir not present

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

Check O2 Supply patient safety

After calibration, both supply valves open; sensor1 <23% after 20 seconds

Ranked causes

1. O2 supply not connected (common)
2. Kinked hoses in sensor housing (occasional)

First check

Monitor sensor reading post-calibration

Test point: Servo O2 status screen
Expected: >23% after 20 seconds, >23%

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

Compartment sensor difference exceeds threshold

Software detects difference in two air thermistors greater than 0.5°C

Ranked causes

1. Defective compartment air probe or harness (common)
2. Defective control board (occasional)

First check

Measure resistance of two air thermistors

Test point: control board J1, pins 1-2 and 3-4
Expected: within about 100 ohms

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

Compartment sensor failure

Software detected difference in two air thermistors exceeding 0.5°C threshold

Ranked causes

1. Defective compartment air probe or harness (common)
2. Defective control board (occasional)

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

More symptoms

Device equipped with servo-humidity but actual RH shows only 0
Device will not switch to Baby Mode
Elevating base motor not responding
Fan always in high speed
FiO2 > 26%
Heater wire harness degradation or poor connection
High Oxygen
Humidifier heater not warming
Humidity sensor reading unstable
Incubator heater not heating
No Alarm LED Indicators at Power On
No audio alarm
Oxygen System Failure 2
Oxygen System Failure 6
Patient probe 1 or 2 failure
Patient probe thermistor difference exceeds threshold
Radiant heater doors do not open completely when canopy is raised
Scale not communicating with bed unit
Scale weight reading incorrect or not resetting
System Failure 11
System Failure 12
System Failure 16: Heater does not turn off during power-on self test
System Failure 23: Heater will not turn off during operation
System Failure 28: SBC board lost communication with control board
System Failure 3
System Failure 35: Wrong dipswitch setup
System Failure 5
System Failure 6
System Failure 7
Temperature Out of Calibration Alarm
Temperature probe reading incorrect
Air temperature alarm activated even though compartment temp is below threshold
Alarm board component replacement
Bed lower pedal pressed during startup
Bed raise pedal pressed during startup
Bed raise/lower pedal not responsive
Bed warms up very slowly, may not reach set temperature
Calibration fan replacement
Calibration valve and manifold assembly replacement
Calibration: Humidifier
Calibration: Mains voltage
Calibration: Oxygen sensor assembly
Calibration: Power supply replacement
Calibration: Relay board replacement
Calibration: Scale weight measurement
Calibration: Servo controlled oxygen system
Calibration: System voltage reference
Calibration: Vent screen replacement
Canopy does not reach travel limits
Canopy is clouded
Canopy misalignment
Canopy removal for service
Canopy rises slowly and stops before doors are opened fully
Canopy travels down part way then stops or goes very slow for the last part
Clock battery replacement
Clock battery voltage too low
Compartment sensor disassembly
Device always powers up in Service screen mode
Display module requires repair or replacement
Electrical safety and calibration procedure
Electrostatic discharge hazard during service
Elevating base does not raise or lower
End cap safety valve internal parts replacement
Fan motor replacement
Fan running in high speed but no message, Air Boost not on
Heater door cable over-tensioned
Heating element electrical failure
Humidifier reservoir has scaling
Humidifier reservoir is crazed (has hairline cracks)
Humidity sensor replacement required
Incubator fan not operating
Incubator heater resistance measurement
Motor Drive Failure Alarm
No HFAS Indicator (Green LED)
No Red Alarm Indicators
No White Alarm Indicators
No Yellow Alarm Indicators
Noise from speaker on power down
O2 Cal Lost-No O2
Oxygen System Failure 3
Oxygen System Failure 4
Oxygen System Failure 7
Oxygen system sensor replacement
Oxygen system supply valve leak test
Oxygen system vent screen replacement
Patient Cold or Patient Hot alarm does not trigger at 0.5C or 1.0C in Air Mode
Patient Hot or Patient Cold alarms activated while device in Manual Mode
PF battery replacement
Porthole door hinge pin stuck or difficult to remove
Power Supply replacement verification
Power supply voltages low or absent
Radiant heater resistance measurement
Regulator assembly replacement
Scale does not return a weight
Scale is slow to return a weight after baby is placed on bed
Scale is stuck on Lift Baby, Hold Baby, or Replace Baby screen
Sensor housing cover or internal board replacement
Sensor housing plug assembly replacement
Software upgrade fails
Supply valve replacement
System Failure 1
System Failure 13
System Failure 14
System Failure 26: Safety relay 1 does not turn off
System Failure 27: Defective non-volatile memory
System Failure 29: Defective signal on control board
System Failure 33: Defective RH Solid State Relay
System Failure 34: Software revision level does not match
Temperature sensor replacement required
Toroidal Transformer replacement

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

Error codes

Code	Meaning	Trigger	Severity
`36`	LV1 differs from LV2 by greater than 10% of LV2	Voltage mismatch between LV1 and LV2 exceeds 10%	error
`37`	Defective switches detected	Switch fault detected (software 1.60 or higher)	error
`38`	Door switches show doors both open and closed	Door switch logic shows physically impossible state	error
`55`	SBC board on-line self-test failure	SBC board self-test failed during operation	error
`60`	Line circuit failure	AC line circuit fault detected	error
`61`	Unable to recover from power fail	Device cannot recover after power loss	error
`62`	Complete loss of communication between control and SBC board	Control board to SBC board communication completely lost	error
`63`	Control board incompatible software version	Software version mismatch detected	error
`70`	Unexpected SBC software problem	SBC software fault detected	error
`71`	Unexpected SBC software problem	SBC software fault detected	error
`81`	Unexpected SBC software problem	SBC software fault detected	error
`82`	Unexpected SBC software problem	SBC software fault detected	error
`83`	Unexpected SBC software problem	SBC software fault detected	error
`85`	Intermittent loss of communication between control and SBC board	Intermittent communication loss detected	error
`98`	Overflow condition detected	Software overflow condition detected	error
`99`	Logic problem on the control board	Control board logic fault detected	error
`Calibration Failed`	After 5 minutes in calibration mode, sensors not reading 23-55 mV	Sensors cannot reach calibration range during calibration	error
`Check O2 Supply`	After calibration with both valves open, sensor1 <23% after 20 seconds	Insufficient oxygen flow to sensor housing	error
`FiO2 > 26%`	Elevated oxygen in patient compartment not controlled by servo system	Oxygen level exceeds 26% and servo cannot reduce it	warning
`High Oxygen`	Sensor1 reading >3% above oxygen set point	Occurs when set point elevated	error
`Low Oxygen`	Sensor1 reading >3% below oxygen set point	Occurs 7 minutes after set point change or canopy closure	error
`Mains voltage calibration failed`	Entered mains voltage differs from measured value by more than 20%	Mains voltage entry during system calibration procedure does not match actual AC line voltage	error
`O2 Cal Lost-No O2`	Servo oxygen never calibrated; system non-functional	Power-up with no prior calibration	critical
`Oxygen Probe Failure`	Sensor reading out of range (23-280 mV) or difference between sensors >3%	Sensor malfunction or connection problem detected	error
`Oxygen System Failure 1`	Thermistor temperature reading out of range (15-55C)	Sensor temperature outside valid range	error
`Oxygen System Failure 2`	RH (relative humidity) reading out of valid range (1-99%)	Humidity sensor malfunction detected	error
`Oxygen System Failure 3`	Checksum test failed during power-up	Microcontroller memory fault	critical
`Oxygen System Failure 4`	ADC (analog-to-digital converter) self-test failed; Vtest out of range	Converter circuit fault	critical
`Oxygen System Failure 5`	Check O2 Supply alarm silenced twice; sensor1 still <23%	Persistent low O2 flow after multiple alarm acknowledgments	critical
`Oxygen System Failure 6`	Control board cannot communicate with Servo O2 board	Communication interface fault	critical
`Oxygen System Failure 7`	Power-up test detected watchdog circuit problem	Watchdog circuit failure	critical
`RH Sensor Calibration Failed Try Again`	Relative humidity sensor calibration failed and must be retried	signal from RH sensor is outside expected values at 65–85% RH range	warning
`RH Sensor Calibration Failed Try Again`	RH sensor reading outside acceptable range or hardware defect	RH sensor signal outside 65-85% relative humidity during calibration	error
`System Failure 0`	Communication error between SBC and control board	Device detects that SBC and control board cannot communicate, or bed up pedal pressed during power-up	error
`System Failure 1`	No Timer2 circuit operational	Device detects Timer2 circuit of microprocessor is not functioning at startup	error
`System Failure 11`	ADC on control board running too slow	Device detects ADC not operating within specification during startup or operation	warning
`System Failure 12`	Incorrect control board system software checksum	Device detects software PROM checksum mismatch at startup	error
`System Failure 13`	Defective SRAM circuit on control board	Device detects SRAM circuit malfunction during startup	critical
`System Failure 14`	Defective watch dog circuit on control board	Device detects watch dog (WDOG) circuit not functioning during startup	critical
`System Failure 15`	Safety Relay 1 test failure; heater cannot be turned on or off	Device unable to control heater via Safety Relay 1 at startup; unable to switch relay on or off	critical
`System Failure 16`	Heater does not turn off during power-on self test	During Power-on Self Test, incubator or radiant heater cannot be turned off	error
`System Failure 17`	Radiant heater does not turn off during calibration	During Power-on Self Test in System Calibration mode, radiant heater cannot be turned off	warning
`System Failure 18`	Defective variables	System calibration error or SRAM circuit failure detected	error
`System Failure 19`	No audio frequency	Audio circuit failure during power-on self test	warning
`System Failure 2`	Timer2 running too fast or no line frequency signal	Device detects Timer2 clock too fast or missing line frequency signal to feed timer circuits	error
`System Failure 20`	Display WDOG time out	Watchdog timer timeout on display board	error
`System Failure 22`	Heater will not turn on during operation	Radiant heater or incubator heater cannot be turned on during device operation	critical
`System Failure 23`	Heater will not turn off during operation	Radiant heater or incubator heater cannot be turned off during device operation	critical
`System Failure 25`	Fan rotation not detected	Optical fan sensor does not detect fan rotation during power-up or operation	error
`System Failure 26`	Safety relay 1 does not turn off	During power-up tests, safety relay 1 cannot be turned off	error
`System Failure 27`	Defective non-volatile memory	Non-volatile memory circuit failure detected on control board	error
`System Failure 28`	SBC board lost communication with control board	Communication link between SBC board and control board failed during operation	error
`System Failure 29`	Defective signal on control board	Signal circuit or component failure on control board	error
`System Failure 3`	ADC channel out of range during calibration	Software detects an ADC channel outside acceptable range during system calibration	error
`System Failure 30`	Mains voltage reading outside expected range	Mains voltage reading LV1 falls outside acceptable limits for detected voltage	error
`System Failure 33`	Defective RH Solid State Relay	Radiant heater SSR failure detected during power-on self test	error
`System Failure 34`	Software revision level does not match	Control board and SBC board software versions are incompatible	warning
`System Failure 35`	Wrong dipswitch setup	Control board dipswitch configuration incorrect	warning
`System Failure 5`	Voltage reference out of range 1.171V - 1.259V	Device detects volt reference outside specified range during system startup or operation	warning
`System Failure 6`	Defective overtemp DAC circuit on control board	Device detects overtemp DAC circuit is not functioning during startup or calibration	warning
`System Failure 7`	1.0 V Thermistor reference out of range 0.951V - 1.049V	Device detects thermistor reference voltage outside specified range during startup or operation	warning
`System Failure 8`	No line frequency signal detected	Device detects missing 120Hz (60Hz system) or 100Hz (50Hz system) line frequency signal at startup	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.