Datex-Ohmeda Aestiva 7900 SmartVent Technical Reference Manual page 121

Error code (hex) Description of error logged
10049 Minimum system shutdown:
display voltage test failed
1004A Minimum system shutdown:
A/D converter failure
1004B Minimum system shutdown:
CPU test failure
1004C Minimum system shutdown:
flash EPROM failure
1004D Minimum system shutdown:
external RAM failure
1004E Minimum system shutdown:
display RAM failure
1004F Minimum system shutdown:
software watchdog failure
10050 Minimum system shutdown:
sequential watchdog failure
10051 Minimum system shutdown:
CPU clock too fast
10052 Minimum system shutdown:
CPU clock too slow
10053 through Minimum system shutdown:
10057 CPU internal error
10058 Minimum system shutdown:
V_AUX test failed
10059 Minimum system shutdown:
external reference voltage failed
1005A Minimum system shutdown:
bootup memory failure
1006-0453-000 05/04
Service action
Reboot system. If problem continues,
For machines with original CPU:
1. Measure voltage at TP 22 of the PSB (Section 6.6.1).
Verify VH_EL = +14.5V (10-15V).
If in spec, replace PSB to CPU cable; otherwise continue.
2. Disconnect the Display cable. Measure again.
If in spec, replace EL Display; otherwise continue.
3. Disconnect CPU board. Measure again.
If in spec, replace CPU board; otherwise replace PSB.
For machines with Integrated CPU:
1. Measure voltage at TP 213 of the CPU (Section 6.6.3).
Verify VH_EL = +14.5V (10-15V).
If in spec, replace CPU; otherwise continue.
2. Disconnect the Display cable. Measure again.
If in spec, replace EL Display; otherwise replace CPU.
Reboot system. If problem continues, replace CPU board.
Reboot system. If problem continues, replace CPU board.
Reboot system. If problem continues, replace CPU board.
Reboot system. If problem continues, replace CPU board.
Reboot system. If problem continues, replace CPU board.
Reboot system. If problem continues, replace CPU board.
Reboot system. If problem continues, replace CPU board.
Reboot system. If problem continues, replace CPU board.
Reboot system. If problem continues, replace CPU board.
Reboot system. If problem continues, replace CPU board.
Reboot system. If problem continues,
For machines with original CPU:
1. Measure voltage at TP 19 of the PSB (Section6.6.1).
Verify V_AUX = +4.988 to +6.09V.
If in spec, replace PSB to CPU cable; otherwise continue.
2. Disconnect CPU board. Measure again.
If in spec, replace CPU board; otherwise replace PSB.
For machines with Integrated CPU:
1. Replace CPU board
Reboot system. If problem continues, replace CPU board.
Reboot system. If problem continues, replace CPU board.
5 Troubleshooting
5-5