Ambulatory Blood Pressure Monitor 90217 Service Manual
5-5
Troubleshooting
Problem Solving Checklist
Use this table to diagnose a monitor problem:
Problem Possible Cause Solution
Modem indicators are
incorrect.
Modem switch settings are
incorrect.
Monitor display is incorrect. No data was transferred.
Check modem cable for tight
connection.
Only the last digit to the right
changes when attempting to
communicate.
Data being received fails the CRC
test and is declared corrupt.
Check communications cable
for tight connections. If it is
loose and a bright external light
is present, the light may be
corrupting the data.
Data is not retained. Replace backup battery.
Power is low or not there.
Check the batteries for correct
polarity and a full charge. If
needed, replace or recharge
the batteries.
Can be one of the following: time-
out, no reading due to air leak in the
system, improper cuff size, or cuff
not properly attached to the monitor.
Isolate cause and correct.
If using a modem, phone line is bad.
Have phone company check
out line.
If using a modem, phone system is
incorrectly configured.
Verify modem configuration
with the phone company and
with Spacelabs Medical
Technical Support.
Monitor displays “LLL” and
alarm sounds.
Main battery is low.
Turn OFF monitor immediately.
Replace batteries to continue
monitoring.
Cuff is too tight.
Cuff placed on the patient too
tightly.
Reposition the cuff.
The air pump stayed ON too long.
Return the unit to Spacelabs
Medical for service.
Cuff is too loose when inflated.
Cuff is placed on the patient too
loosely.
Reposition the cuff.
Air pump is not staying ON long
enough.
Return the unit to Spacelabs
Medical for service.
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