GE Giraffe OmniBed Carestation CS1 Service Manual

Chapter 5: Troubleshooting
Servo Controlled Oxygen
Service Manual 5-19
Oxygen System
Failure 1
The sensor plug
thermistor
temperature
reading is out of
the range:
15C-55C.
Device is cold:
<15 degrees C.
Allow device to warm up.
Cooling fan is not
running when the
sensor housing
temperature gets
above 50 degrees.
Test the cooling fan. Refer to the
Tips section (5.4.4).
Defective sensor plug
thermistor or cable
Disconnect the cable and measure
the resistance of the thermistor
between J85.4 and J85.5. Refer to
R/T chart (the temperature to
resistance curve) in the Tips
section (5.4.4). If sensor is shorted,
open, or values don’t agree with
the R/T chart, replace the sensor
plug assembly or the cable.
Defective servo
O2 board
If resistance is in range replace the
servo O2 board.
Oxygen System
Failure 2
The RH reading is
out of valid
range: 1-99.
When out of
range it displays
0 in service Mode.
Defective sensor plug Measure the humidity sensor
voltage between J85.2 and J85.1. If
the voltage is outside the range of
0.7V- 4.0V, replace the sensor plug
assembly.
Defective servo O2
board
If it is in the correct range, replace
the servo O2 Board.
Oxygen System
Failure 3
The checksum
test performed
during power up
testing failed.
Defective
Microcontroller
Replace microcontroller U6 on the
Servo O2 board.
Oxygen System
Failure 4
Analog to digital
converter circuit
self test failed.
The reading of
Vtest is out of the
valid
range:1.216V-
1.254V.
Defective Servo O2
board
Replace servo O2 board.
Check O2 supply After calibration,
both supply
valves are
opened and after
approximately 20
seconds, sensor1
reading is not
greater than
23%.
O2 supply not
connected
Verify O2 supply, minimum 45psi
(310kPa) is connected to the inlet.
Kinked hoses in sensor
housing
Check hoses.
Alarm Message Meaning Cause Action

GE Giraffe OmniBed Carestation CS1 Specifications

General

Brand	GE
Model	Giraffe OmniBed Carestation CS1
Category	Medical Equipment
Language	English