Troubleshooting, General monitor problems – ADS Environmental Services Model 3600 530002 A2 User Manual
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Troubleshooting
7-3
Troubleshooting
The following tables contain troubleshooting hints for managing problems with
specific components and subsystems of the QS3600 flow monitor.
General Monitor Problems
The following tables contain common troubleshooting techniques for the 3600 flow
monitor.
Problem
The monitor does not answer a telephone call.
Possible Cause
The EMU modem or monitor battery is low. The modem switch settings are incorrect. The
modem, communication board, or processor board is faulty. The telephone line is noisy or
has been cut. The connectors are loose.
Solution
Verify that the voltage of the pair of phone cables, which travels across the phone wire and
enters the EMU, is approximately 48 Vdc on hook. Verify that the connection is firm and
that the wires are stripped correctly.
Replace the EMU modem with a new modem to determine if it the modem is the problem. If
modem is faulty, replace the modem and send the old one to ADS for repair. Collect the data
via phone lines.
Temporarily connect the new EMU modem to the monitor to determine if the existing EMU
communication board is okay. If the communication board is faulty, replace the board and
send the faulty one to ADS for repair. Collect the data via phone lines.
Temporarily connect a new monitor to the EMU with a test communication cable to
determine if the monitor is at fault. If the monitor is faulty, replace the monitor and send the
old one to ADS for repair. An ADS technician will retrieve data from the monitor in the
office.
Problem
You receive a busy signal when calling the monitor.
Possible Cause
There may be a shorted or cut telephone line; water at or in the telephone connector; a faulty
modem; or a low modem/EMU battery.
Solution
Remove the test wire from the bell box and call the office. If the line works, the problem is
with the monitor.
Check the voltages for a shorted (approximately +5 Vdc) telephone line.
Check the area for a cut telephone line.
Check the telephone connector for moisture.