D - 5
D.2.3 Resp Technical Alarm Messages
D.2.4 SpO
2 
Technical Alarm Messages
D.2.5 Temp Technical Alarm Messages
Note: XX represents a temperature site, for example skin, core, axil, T1, and so on.
Alarm message Default priority Indication on 
alarm reset
Cause and solution
Resp Interference Prompt / The respiration circuit is disturbed. Check for any 
possible sources of signal noise.
Electrode Poor Contact Prompt / Check the electrode application. Reposition or 
replace the electrodes if necessary.
Alarm message Default priority Indication on 
alarm reset
Cause and solution
SpO2 Sensor Off Adjustable B The SpO
2
 sensor has become detached from the 
patient or the module. Check the sensor 
connection. If the alarm persists, replace the 
sensor.
SpO2 No Sensor Low A The SpO
2
 extension cable is detached from the 
SpO
2
 module, or the SpO
2
 sensor is detached 
from the SpO
2
 extension cable. Check the SpO
2
 
cable and the sensor connection. If the alarm 
persists, replace the sensor.
SpO2 Excess Light Low C Ambient light is too strong. Move the sensor to a 
place with lower level of ambient light or cover 
the sensor to minimize the ambient light.
SpO2 No Pulse Low C The SpO
2
 sensor failed to obtain pulse signal. 
Check the patient’s condition and replace the 
sensor application site. If the alarm persists, 
replace the sensor.
SpO2 Sensor 
Incompatible
Low C Incompatible or an unspecified SpO
2
 sensor is 
used. Use specified sensors.
SpO2 Low Signal Quality Low C 1. Check the sensor and sensor position.
2. Make sure the patient is not shivering or 
moving.
3. The patient’s pulse may be too low to be 
measured.
SpO2 Interference Low C The SpO
2
 signal has been interfered. Check for 
any possible sources of signal noise and check 
the patient for excessive motion.
SpO2 Sensor Error Low C Replace the sensor and measure again.
SpO2 Searching Pulse Prompt / SpO
2
 is searching for pulse.
SpO2 Low Perfusion Prompt / The SpO
2
 sensor is not properly placed or the 
patient’s perfusion index is too low.
1. Check the sensor and sensor position.
2. Reposition the sensor if necessary.
Alarm message Default priority Indication on 
alarm reset
Cause and solution
T XX Sensor Off Low A Check the sensor connection and reconnect the 
sensor.