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12. Troubleshooting (2)
Problem Possible cause Solution
LCD shows the symbol
for a low battery
Low battery Change the batteries
LCD shows “Er 0”
Pressure system is unsta-
ble before measurement.
Don’t move and try
again.
LCD shows “Er 1”
Fail to detect systolic
pressure.
LCD shows “Er 2”
Fail to detect diastolic
pressure.
LCD shows “Er 3”
Pneumatic system blocked
or cuff is too tight during
ination.
Apply the cuff cor-
rectly and try again.
LCD shows “Er 4”
Pneumatic system leakage
or cuff is too loose during
ination.
LCD shows “Er 5”
Cuff pressure above
300 mm Hg
Measure again after
ve minutes. If the
monitor is still abnor-
mal, please contact
the local distributor or
the factory.
LCD shows “Er 6”
More than 3 minutes
with cuff pressure above
15 mmHg
LCD shows “Er 7” EEPROM accessing error
LCD shows “Er 8”
Appliance parameter
checking error
LCD shows “Er A”
Pressure sensor parameter
error
No response when you
press a button or load
batteries.
Incorrect operation or
strong electromagnetic
interference.
Take out batteries for
ve minutes, and then
reinstall all batteries.