FlashGuard 2000B Troubleshooting Guide
Possible Cause: Day capacitor/s or 20Ω resistors faulty, or connection loose/open.
Diagnostic Test: With all conductors attached, check resistance across the terminals of any C2 capacitor. Resistance should be @ 40Ω.
Corrective Actions:
1.If resistance is near 0Ω, one or more C2 capacitors is shorted. Remove conductors to each capacitor, and individually check / replace each capacitor.
2.If resistance is too high, one or more C2 capacitors may a loose connection, or one or more of resistors R2, R3, and R4 may be defective or have a loose connection. Tighten connections to all C2 capacitors and resistors R2, R3, and R4. If resistance is still too high, individually disconnect / check / replace the
resistors.
Note: The resistors R2, R3, and R4 are located under the control panel (where the test switches are) below the diode board DB1. R2 is at the bottom, R3 in the middle, and R4 is topmost of the three.
Possible Cause: Diode board DB1 faulty.
Diagnostic Test: Remove the two mounting screws on the control panel. Disconnect DB1, and measure resistance across each diode. Replace DB1 if any diodes have shorted. Note: The diode board DB1 is located under the control panel where the test switches are.
Corrective Action: Replace DB1.
Section 6 System will not switch between day and night modes correctly.
Possible Cause: Mode switches in wrong position.
Diagnostic Test: Put both mode switches in “Remote” position. Illuminate the photocell for a minute or so to approximate daytime conditions. The system should go into day mode. Cover the photocell with a thick, dark, opaque material, to approximate nighttime conditions. Wait for a minute or so. The system should go into night mode. If the system does not respond correctly to the photocell, try changing modes by using the mode switches on the control panel.
Corrective Action: If the system responds to the switches, but not to the photocell, replace the photocell.
Possible Cause: K2 mode relay malfunctioning.
Diagnostic Test: Set the day mode switch to “Remote,” night mode to “Test.” The K2 relay should energize. If not, measure for 120 VAC across the relay coil. Alternatively, remove the connectors and check resistance across the K2 coil – it should be @ 300Ω.
Corrective Action: Replace the K2 relay.
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