YOU did NOT SPECIFY your MODEL NUMBER but tonight ~ Christmas Eve ~ YOU got LUCKY! I found this and it may help you...
but
THIS INFORMATION MAY NOT BE FOR YOUR DEVICE!
"LCD shows "Er 4"
Pneumatic system leak
or cuff is too loose during inflation
And this:
LCD shows "Er 0"
Pressure system is instable before measurement
Be still and measure again
LCD shows "Er 1"
Systolic pressure detect fail
LCD shows Er2 Diastolic pressure detect fail
LCD shows "Er 3"
Pneumatic system is
blocked or cuff is too
tight during inflation
Place the cuff correctly
and try again
LCD shows "Er 4"
Pneumatic system leak
or cuff is too loose du-
ring inflation
LCD shows "Er 5"
Inflation
above
300mmHg
Measure again after 5
minutes. If the moni-
tor is still abnormal,
please contact the
local distributor / ma-
nufacturer.
LCD shows "Er 6"
Over 3 minutes while
pressure above 15
mmHg
LCD shows "Er7"
EEPROM accessing er-
ror
LCD twinkling
Device
parameter
check error
LCD shows "Er 9"
MCU self-verity error
LCD shows "Er A"
Span error
LCD shows "Er b"
EEPROM Backup-error
http://webcache.googleusercontent.com/search?q=cache:V0KPe0jswmgJ:www.hmm.info/uploads/tx_sbdownloader/smartLAB_profi_user_manual_ENGLISCH_R4.pdf+&cd=2&hl=en&ct=clnk&gl=us&client=firefox-b-1
An M & S System.
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