System Failure 18; System Failure 19; System Failure 20 - GE Giraffe OmniBed Carestation CS1 Service Manual

6.2.8 System Failure 8
System failure 8 indicates: No Line Frequency. When troubleshooting this error code, have control board, 50
pin ribbon cable, and relay board on hand.
Cause(s)
Defective control board
Defective 50-pin ribbon
cable between the relay
board and control board
Defective relay board
6.2.9 System Failure 11
System failure 11 indicates: The ADC on the control board is not operating to spec (too slow).
Cause(s)
Defective humidifier
sensor or cable
Defective control board
6.2.10 System Failure 12
System failure 12 indicates: Incorrect control board system software checksum.
Cause(s)
Defective system software
PROM on control board
Defective control board
Service Manual
Action(s)
Measure the signal on the control board between J9 pin 43, and TP1-4
(Ground). It should be a 120 hertz signal. If the signal is OK, replace the
control board.
If no signal, check continuity on the 50-pin cable, pin 43. If defective,
replace the cable.
Replace the relay board.
Action(s)
Disconnect J1 on the control board. If it powers up OK, either the cable or
the humidity sensor is defective. Reconnect J1 and disconnect the 4 pin
humidity sensor connector in the compartment probe. If the device now
powers up OK, the humidity sensor is defective. If not, the cable is
defective.
If the error persists with the replaced sensor or cable, replace the control
board.
Action(s)
Install new system software 2089261-001.
If the error persists with new software, replace the control board.
Chapter 6: Alarms and System Failure Codes
System Failure Codes
6-15