7-20 
Cause  FRU  Solution 
3. If the problem persists, replace the 
EFCS control board (refer to 11.3.1). 
0x00000020 
Electromagnet 2 
power-off failure 
Electromagnet 
2 
EFCS control 
board 
1. Perform steps 1, 3, 6, 7, and 8 in 
section 4.6.5.2 to identify the faulty 
electromagnet, and then replace the 
faulty electromagnet (refer to 
11.1.5). 
2. If the problem persists, replace the 
EFCS control board (refer to 11.3.1). 
 
7.3.5 VCM Runtime Alarms 
Aux Control 
Module Comm 
Stop 
High 
The CPU board fails to 
communicate with the 
auxiliary VCM for 10s. 
1. Restart the anesthesia machine. 
2. If the status screen has a 
communication stop alarm, or encounters 
the black or blank screen error, rectify 
the fault of the status screen first (refer to 
7.2.1). 
3. If the problem persists, re-plug the 
VCM (refer to 8.6), and reconnect the 
cable between the backplane and display 
(refer to 8.1.7). 
4. If the problem persists, replace the 
monitoring and controlling assembly 
Ventilator Voltage 
Error 
High 
The VCM voltage is 
beyond the normal 
range. 
1. Restart the anesthesia machine. 
2. If the power board has a voltage error 
alarm, clear this alarm (refer to 7.3.3). 
3. Select Setup > Service > Data 
Monitors > VCM and check whether the 
voltages in the A/D channel fall within 
the range specified in the A/D channel 
table. If yes, the alarm will disappear in 
3-5s. 
4. If the power supply voltage is out of 
the normal range, replace the monitoring 
and controlling assembly (refer to 
PEEP Valve 
Failure 
Med 
1. A PEEP valve voltage 
error occurs. 
2. A PEEP valve 
pressure error occurs. 
1. Restart the anesthesia machine. 
2. If the power board has a voltage error 
alarm, clear this alarm (refer to 7.3.3). 
3. Select Setup > Service > Data 
Monitors > PEEP Valve to run a PEEP 
valve test. If the test fails, replace the 
drive gas assembly (refer to 11.1.17). 
4. If the PEEP valve test is passed, check 
whether the PEEP valve or PEEP 
pressure sensor is faulty by referring to 
7.6.2. 
5. If the pressure sensor is faulty, 
perform the pressure sensor calibration