Motor Drive Failure" Alarm; Power Failure (Led Indicator); Temperature Out Of Calibration" Alarm - GE Giraffe Service Manual

Cause or Circumstances
Humidifier heater
measures OK
No mains voltage at input
to humidifier isolation
transformer. (J55, 1-2)

4.3.14 "Motor Drive Failure" Alarm

Cause or Circumstances
The software has detected
that the elevating base
motor was running when
not turned on.

4.3.15 Power Failure (LED Indicator)

Cause or Circumstances
No AC power into unit
Mains power is present but
the 5V power supply is not
present.

4.3.16 "Temperature out of Calibration" Alarm

Cause or Circumstances
Calibration data is lost.
© 2001 by Datex-Ohmeda, Inc.. All rights reserved.
Failure
Relay boards rev 10 or
higher.
Relay boards rev 9
or lower. Humidifier
Interface Board is
mounted on relay board
Defective fuse. Relay
boards rev 10 or higher
Defective fuse. Relay
boards rev 9 or lower.
Humidifier Interface
Board is mounted on
relay board.
Defective relay board.
Failure
Defective relay board.
Failure
On/Off switch is not
turned on.
Defective fuse F1 or F2 on
relay board.
Defective power supply.
Failure
Defective calibration.
Defective control board.
Action
In service mode, verify mains voltage is present at
the input to the humidifier isolation transformer. (J55
1-2)
In service mode, verify mains voltage is present at
the input to the humidifier isolation transformer. (J56
1-2) J56 is on Humidifier Interface Board mounted
on relay board.
Check fuses F3 and F4 on the relay board. If OK,
continue.
Check fuses on humidifier interface board.
Replace the relay board.
Action
Replace the relay board.
NOTE: Humidifier will not operate during this failure.
Action
Verify cord is plugged into a live wall outlet. Verify
power switch/circuit breaker on back of unit is
turned on.
Check the 5 volt supply. Refer to the Tips section
4.6.3. If no 5 volts, possible defective fuses on mains
to the power supply. Check F1 and F2 on relay
board.
Check input to power supply for mains voltage. If
present and no 5 volts at output, then power supply
is defective.
Action
Perform system calibration
If problem persists replace the control board.
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Chapter 4: Troubleshooting
37