GE Giraffe Service Manual page 80

Chapter 4: Troubleshooting
Symptom Possible Cause
Bed warms up
very slowly, may One of the bed heater
not reach set cartridges is defective.
temperature.
Unit always
Defective dipswitch setting
powers up in
service screen
Override switch (>37C) on
mode.
control panel shorted
Defective circuit on control
board (Unbiased RS485 bus
during idle state).
Screen refreshes
every few seconds
Defective scale.
while scale is
attached.
Defective scale harness.
Noise from
Microprocessor does not
speaker on power
hold reset during power off.
down.
Fan is running in This is normal condition for
high speed but 90 minutes after power up,
no FAN ALWAYS 45 min. after transition from
IN HIGH SPEED open to closed bed mode,
message and the and during other conditions
Boost Air Curtain as determined by the heat
Indicator is not lit. control software.
Tilt ball not engaged in
Bed will not lock in
finger pocket latch.
tilt position.
Tilt brake pad failure.
Baby Cold or Baby
Hot Alarm does
Manual Temp. Alarm is
not trigger at
disabled on Service Screen.
0.5C or 1.0C in Air
Control mode.
Humidifier
reservoir is crazed
Sterilization
(has hairline
cracks).
52
Action
Feel the heat sink to see if one side is cooler than the other.
Use care, since the heat sink can reach temperatures as
great as 121C (250F). Replace the cartridge on the cool
side.
Check position 8 on the control board dipswitch. Should be
set to Off position.
Check switch on switch diagnostic screen.
Replace control board with revision 17 or higher.
Disconnect scale connector at probe panel. Power cycle
the unit. If error clears replace the scale.
Disconnect scale harness from J7 on the control board.
Power cycle the unit. If error clears replace the scale
harness.
If noise is excessive, replace control board with revision 17
or higher.
To check HIGH and LOW fan speed, power up the unit.
After the power up sequence is complete, hold down
the Boost Air Curtain button and press the decrease
temperature button to place the unit into low fan speed.
The Boost Air Curtain button will now toggle the fan
between high and low speeds.
Tilt the head of the bed platform all the way down while
holding the latch open, then let the latch close to capture
the tilt ball. (Refer to "Disassembling the Incubator for
Complete Cleaning" in the Operation and Maintenance
manual.)
Replace the tilt brake.
Enable Manual Temp. alarm.
Replace humidifier reservoir.
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© 2001 by Datex-Ohmeda, Inc.. All rights reserved.