Chapter  12  Troubleshooting   
12-9 
12.2.3
 
ERROR LED Indicators Blinking Rapidly Every 0.2 Seconds 
This happens when the power supply 24 VDC of the CPU module is disconnected, or the power supply is not sufficient, 
not stable or abnormal.   
Error 
Code 
Description  Solution  Flag  Log 
002A  The external voltage is abnormal. 
Check whether the external 24 V power supply to the 
SM7  V 
 
12.2.4
 
ERROR LED Indicators Slow Blinking Every 3 Seconds and 
Lighting up for 1 Second 
Error 
Code 
 
Description  Solution  Flag  Log 
1500 
 
Connection lost in the remote 
modules 
Check the network connection cable.    SM30  V 
1502 
- 
Errors occurred in the remote 
modules 
Refer to Section 12.3.4 for more information on the 
remote module error codes. 
SM30  V 
1800 
- 
180F 
Errors occurred in the extension 
modules 
Refer to Section 12.3 for more information on the 
extension module error codes. 
SM10  V 
1900 
- 
191C 
Heartbeat errors occurred in the 
slave for the Delta ASD-A2 
control. 
1. Check the CANopen connection cable.   
2. Check if the specific slave is working properly.   
Note: The last 2 digits of the error code represent the ID 
number of the slave (convert hexadecimal to decimal). 
-  V 
 
12.2.5
 
BAT. LOW LED Indicators Are ON 
This happens when there is no battery (CR1620) or the power is low. Turn this option off in the HWCONFIG > CPU > 
Device Setting > Show Battery Low Voltage Error CPU when you don’t need the RTC function to keep track of the 
current time (default is enabled).       
Error 
Code 
 
Description  Solution  Flag  Log 
0027 
Battery Low  Change battery or turn this option off   
SM219  X 
 
12.2.6
 
BAT. LOW LED Indicators Blinking Every 0.5 Seconds 
This happens when RTC cannot keep track of the current time.   
Error 
Code 
Description  Solution  Flag  Log 
0026 
RTC cannot keep track of the 
Contact the factory.  SM218
V