D-4 
Measurement  Alarm message  L I Cause and solution   
ECG Low Freq. Noise  L  A Low frequency signals are detected on the 
ECG analysis lead. Check for any possible 
source of interference around the cable and 
electrode. 
ECG Amplitude Too 
Small 
L  C The ECG amplitude didn’t reach the 
detected threshold. Check for any possible 
source of interference around the cable and 
electrode. 
ECG Config. Err  L  C ECG configuration is wrongly downloaded. 
Check the downloaded configuration and 
re-download the correct configuration. 
Resp  Resp Disturbed  L  A The respiration circuit is disturbed. Restart 
the monitor. 
Temp  Temp Cal. Err  H  C A calibration failed. Restart the monitor. 
T1 Sensor Off  L  A The Temp sensor has become detached from 
the patient or the module. Check the sensor 
connections. 
T2 Sensor Off  L  A
SpO
2
 SpO
2
 Sensor Off  L* B The SpO
2
 sensor has become detached from 
the patient or the module, or there is a fault 
with the SpO
2
 sensor, or an unspecified 
SpO
2
 sensor has been used. Check the 
sensor application site and the sensor type, 
and make sure if the sensor is damaged. 
Reconnect the sensor or use a new sensor. 
SpO
2
 Sensor Fault  L  C
SpO
2
 No Sensor  L  B
SpO
2
 Unknown 
Sensor 
L C
SpO
2
 Sensor 
Incompatible 
L C
SpO
2
 Too Much Light L  C There is too much light on the SpO
2
 sensor. 
Move the sensor to a place with lower level 
of ambient light or cover the sensor to 
minimize the ambient light.   
SpO
2
 Low Signal  L  C The SpO
2
 signal is too low or too weak. 
Check the patient’s condition and change 
the sensor application site. If the error 
persists, replace the sensor.   
SpO
2
 Weak Pulse  L 
 
C
 
SpO
2
 Interference  L  C The SpO2 signal has been interfered. Check 
for any possible sources of signal noise 
around the sensor and check the patient for 
great motion. 
SpO
2
 Board Fault  L  C There is a problem with the SpO
2
 
measurement board. Do not use the module 
and contact your service personnel.