Detcon 840 - Manual (Page 32)

840 Operators Manual
Model 840 Operator Manual Rev. 1.9 Page 28 of 29
9.
Troubleshooting Guide
Problem Potential Fix
Unit will not Power Up
→
Check for correct AC or DC voltage selection.
→
Check for correct VAC and VDC powering configuration.
→
Check that the alarm relays are configured properly Relays are not firing
Program Locks up or showing
erroneous information
→
Re-initialize unit. By pressing the Program Key for 3-5
seconds during power-up recycle (Screen will display
“Restoring Defaults)
→
Re-enter all Channel and alarm information.
Alarms on constantly
→
Insure that no channels are set to ascending or descending
incorrectly.
→
Check that Alarm Annunciators current draw does not
exceed the on-board Power Supply limitations. Replace with
external Power Supply if necessary.
Alarm Firing causes unit to ‘Lock-
Up’
→
SW1-1 must be set to “OFF” position. Analog Sensors reading “FAULT”
→
SW1-1 must be set to “ON” position. Serial Sensors reading “NO-COMM”
→
SW1-2 Must be set to the correct position for the sensor or
Mod 10 Controller (“ON” for Mod 10 Controllers, “OFF” for
600/700 Series Sensors)
Serial Sensors display incorrect readings
Contact the Detcon Service Department for further troubleshooting assistance at 281-367-4100.
10.
Spare Parts
500-005077-001 Motherboard
PCB
500-005073-LCD Controller Board PCB W/ LCD Display
360-600001-000 Replaceable Power Supply with cables
500-005079-000 4-20mA output/RS-485 output PCB (Optional)
340-121200-000 12 VDC Batteries (Optional)
360-BR2330 Date/Time Clock NICAD Battery
11.
Warranty
Detcon, Inc., as the manufacturer, warrants under intended normal use each new Model 840-N4X controller
to be free from defects in material and workmanship for a period of one year from the date of shipment to
the original purchaser. Should the controller fail to perform in accordance with published specifications
within the warranty period, return to Detcon, Inc., for necessary repairs or replacement. All warranties and
service policies are FOB the Detcon facility located in The Woodlands, Texas.