Citizen CHU304, Instruction Manual, Page: 16 / 20

- Eng 15 -
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Make sure to check the following before sending your blood pressure monitor away
to be tested or repaired.
Troubleshooting (1)
Problem Possible Cause Solution
LCD Display
shows abnormal
result
The cuff position was not correct or
it was not properly tightened Apply the cuff correctly and
try again.
Body posture was not correct
during testing
Review the “BODY POSTURE
DURING MEASUREMENT”
sections of the instructions and
re-test.
Speaking, arm or body
movement, angry, excited or
nervous during testing Re-test when calm and without
speaking or moving during
the test.
Irregular heartbeat
(arrhythmia)
It is inappropriate for people
with serious arrhythmia
to use this Electronic
Sphygmomanometer.
Troubleshooting (2)
Problem Possible Cause Solution
LCD shows low
battery symbol
Low Battery Change the batteries.
LCD shows “Er 0”
Pressure system is unstable
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 inflation
Apply the cuff correctly and
try again.
LCD shows “Er 4”
Pneumatic system leakage or
cuff is too loose during inflation
LCD shows “Er 5”
Cuff pressure above
300 mmHg
Measure again after five
minutes. If the monitor is still
abnormal, 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” Device parameter checking error
LCD shows “Er A”
Pressure sensor parameter
error
No response when
you press button
or load battery.
Incorrect operation or strong
electromagnetic interference
Take out batteries for five
minutes, and then reinstall all
batteries.
* If you want to dispose this product, do not mix with general household waste. There is a
separate collection systems for used electronics products in accordance with legislation.
BEFORE REQUESTING REPAIRS OR TESTING
00̲CHU304̲All.indb Eng-15 2015/06/02 11:00:53