- Infinite Alarming & remote control unit User Guide SCOM-100
SCOM-100, User guide  66 
9.2 Troubleshooting 
The ready LED goes off 
after the start up 
sequence. 
Case 1: Error LED is off 
You started the unit for the first time 
and the SIM card does not contain 
a user name and phone number in 
the phone book directory. See 
chapter 3.1. 
Case 2: Error LED is on 
An error occurred during start up. 
See chapter 9.4 & 9.5. 
The unit does not 
respond to SMS at all. 
The unit does not register to the 
GSM provider network. Check if the 
‘NETWORK’ LED is blinking. 
Connect a proper GSM antenna to 
the unit (See chapter 2.6) 
The unit does not 
respond to configuration 
SMS commands. 
The ‘Response SMS’ parameter is 
probably off. Set the parameter to 
on state. 
Read chapter 6.2.1 
The unit does not 
execute my digital 
output control 
commands. 
Check the status LED. 
The unit is probably in STOP or 
MONITOR status. Set the unit 
status to RUN. See chapter 6.1. 
Read the SMS response to your 
command. 










