D - 4
D.2 Technical Alarm Messages
This section lists technical alarms, their default priority, indication on alarm reset, and the actions that can be 
taken when an alarm occurs. 
Technical alarms give different alarm indicators when the alarm system is reset. In this section we classify the 
technical alarms into three categories for easy clarification:
■ A:
 technical alarms are cleared. The monitor gives no alarm indications.
■ B: technical alarms are changed to the prompt messages.
■ C: the alarm is silenced and a √ appears before the alarm message. 
In the following tables we will use A, B, and C to refer to the indications on alarm reset.
D.2.1 General Technical Alarm Messages
Note: XX represents a measurement or parameter label, such as HR, RR, SpO
2
, EtCO
2
, and so on.
D.2.2 ECG Technical Alarm Messages
Note: XX represents ECG lead name, for example RL, LL, V, Va, Vb, and so on.
Alarm message Default priority Indication on 
alarm reset
Cause and solution
XX Module Error High C XX module does not work properly. Replug the 
module, if the alarm persists, contact your service 
personnel.
Alarm message Default priority Indication on 
alarm reset
Cause and solution
ECG Noisy Low/Prompt A The ECG signal is noisy. Check for any possible 
sources of signal noise around the cable and 
electrode, and check the patient for excessive 
motion.
ECG Amplitude Too Small Low C The ECG amplitude does not reach the detected 
threshold. Check for any possible source of 
interference around the cable and electrode.
ECG Lead Off  Low B The electrode has become detached from the 
patient or the lead wire has become 
disconnected from the adapter cable. Check the 
connections of the electrodes and leadwires.
ECG XX Lead Off  Low B The electrode has become detached from the 
patient or the lead wire has become 
disconnected from the adapter cable. Check the 
connections of the electrodes and leadwires.
ECG Signal Invalid Low A Patient skin impedance is too high. Check ECG 
electrode application. 
ECG Learning Prompt / ECG learning is manually or automatically 
triggered.
Cannot Analyze QT Prompt / /
D12L Not Available Prompt C The current Va and Vb combination does not 
support D12L. Choose an available Va and Vb 
combination. For more information, see 
10.5Using 6-lead Placement to Derive 12-lead ECG 
(D12L)
.