10-6
Is the input free of noise?
NO
YES
• Separate the input and 
  communication wiring from the 
  noise source.
• Ground the recorder properly.
• Use shielded cables for input and 
  communication wiring.
• Insert an isolation transformer 
  into the power line.
• Insert a power line filter into the 
  power line.
• If an inductive load is connected 
  to an alarm contact output, use a 
  surge suppresser on that line.
Contact OMEGA.
Display and other functions do not work properly.
Is the key lock released?
NO
YES
Release the key lock using the 
FUNC key (see section 3.13).
Contact OMEGA.
Keys do not work.
10.2  Troubleshooting Flow Charts