Smiths Medical Medfusion 3000 Series, Technical & Service Manual

Page: 67 / 184

Troubleshooting
61 40-5648-51B
System Failure Alarms
This section discusses the diagnosis of system failure
alarms in the Medfusion™ 3000 Series pump, and sug -
gests possible causes and remedies for these alarms.
System failure alarm Cause or remedy
a2d r
eferenCe
v
oltage
Bgnd t
eSt
Background self-test measured an invalid range on analog-to-digital con -
verter reference voltage. Use
Biomed
>
Diagnostics
to check the volt -
age. Replace the main board if invalid voltage found.
aCu P
oWer
S
troBe
f
ailure
Self-test has found that the ACU processor is not maintaining its power
strobe. If this failure repeats, then try full reset of main board – disconnect
AC power, open pump, disconnect battery, short super-cap through ~100
ohm load; then reassemble pump and retest. Replace main board if prob -
lem persists.
aCu W
atChdog
f
ailure
Self-test has found that the ACU watchdog alarm signal active. This alarm
may occur if processor failed to pet watchdog within allotted time (e.g. a
software failure occurred). If problem recurs, replace the main board.
a
nalog
S
uPPly
Bgnd t
eSt
Background self-test measured an invalid range on analog supply volt -
age. Use
Biomed
>
Diagnostics
to check the voltage. Replace the main
board if invalid voltage found.
a
ux
C
ontroller
u
nit
P
oSt
Power-up self-test has found that the ACU processor failed to shut down
motor current during the watchdog alarm test. If problem recurs, replace
the main board.
B
aCkground
CrC t
eSt
t
imeout
Software timing failure. A transient failure may have occurred in the soft -
ware; if problem recurs, replace the main board.
B
aCkground
S
elf
t
eSt
t
imeout
Software timing failure. A transient failure may have occurred in the soft -
ware; if problem recurs, replace the main board.
B
aCkuP
a
udiBle
a
larm
P
oSt
Power-up self-testing has found that the backup audible alarm (controlled
by ACU) is not working at correct power (current) or frequency. Replace
the alarm buzzer on the main board or replace the main board.
C
aliBration
r
equired
Calibration values stored in non-volatile serial EEPROM memory are
invalid. This message appears whenever a new main board is installed.
Calibrate all the sensors in the pump.
C
ontrol
k
ey
S
WitCh
Bgnd t
eSt
Key on keypad was found stuck on during continuous background self-
test. Use Biomed > Diagnostics to determine which key is stuck. If
stuck key is found, replace keypad.
C
ontrol
k
ey
S
WitCh
P
oSt
Key on keypad was found stuck on during power-on self-test. Use
Biomed
> Diagnostics to determine which key is stuck. If stuck key is found,
replace keypad.
C
ritiCal
d
ata
B
loCk
Bgnd t
eSt
Delivery settings are stored in a critical data block of RAM on the main
board. This message will occur if background self-test showed the criti -
cal data block was corrupted (i.e. a RAM cyclic redundancy test failed).
Run power-on self test which executes extensive RAM testing – if problem
recurs, replace the main board.