5-3 
Power board software 
failure  
1. Restart the machine. 
2. Disconnect the battery from the 
AC mains. After the power board 
processor is powered off for 5 
minutes, power it on again. 
3. Update the power module 
software. 
Power System 
Selftest Error 
H 
Power board hardware 
failure 
1. Refer to 5.5Hardware and 
Electrical Problemsto troubleshoot 
the power board hardware failure. 
2. Replace the power board. 
Power Supply 
Voltage Error 
H  3.3V/5V/12V error  1. Measure the voltage at the 
corresponding test point.   
2. If the problem persists, replace 
the power board. 
System DOWN 
for battery 
depletion! 
P  The battery was faulty and 
could not be recharged. 
The system software 
version did not match the 
current machine type.   
1. Connect to the AC mains. 
Measure the battery voltage. Check 
if the battery can be recharged. 
2. Check if the system software 
version matches the current 
machine type. If not, update the 
system software. 
3. If the problem persists, replace 
the power board. 
Power Board 
High Temp 
H  The temperature of the 
power board exceeded 95
℃.  
1. Check the fan for the power 
module. 
2. Stop using the machine for a 
period of time. If the problem 
persists after the machine is 
restarted, replace the power board. 
Breathing Circuit 
Not Mounted   
H  The breathing circuit was 
not installed. Or, it was not 
correctly connected to the 
circuit base.   
1. Check that the circuit is installed 
in place.   
2. Test the connection between the 
connection line and the connector. 
3. Replace the power board (for 
WATO series anesthesia machine, 
the power board detects whether the 
circuit is in position). 
Keyboard Init 
Error 
H Keyboard malfunction. 
Stop using the keyboard. 
1. Restart the machine. 
2. If the problem persists, replace 
the keyboard.