HF scientific Oil Content Bilge Alarm - Manual (Page 10)

Bilge Alarm (02/02)
Rev. 1.3
XVI. TROUBLE-SHOOTING GUIDE
SYMPTOMS PROBABLE CAUSE CORRECTIVE ACTION
Digital Display and/or indicating
lights do not light up.
Unit stays in recirculation mode when
reading is below alarm set point.
Digital display does not change with
changing concentration of oil.
Digital display shows negative but
Alarm and Recirculate light is on.
1. No power to Indicating/Control
Module.
2. Blown fuses.
3. Defective power supply board.
4. Indicating lamp loose or burned
out.
1. Sensing Module Source Lamp
burned out.
2. Defective Failsafe Light Detector.
3. Alarm Relay Defective.
4. Defective Power Supply Board.
5. Opaque Obstruction in flow
channel.
1. Defective Amplifier Board.
2. Defective Digital Display.
3. Open leads from sensor.
4. Defective Measurement Detector
Sensing Module.
1. Sensing Module Source Lamp
Defective.
2. Defective Amplifier PC Board.
3. Defective Digital Display.
4. Fouled windows in flow channel.
1. Turn on power switch. Check
facility input power source.
2. Replace fuses.
3. Test power supply board as
outlined under Test Procedures
and replace if defective.
4. Insert lamps properly or replace.
1. Replace Source Lamp. Re-check
calibration.
2. Replace Failsafe Light Detector.
3. Replace relay.
4. Test Power supply board as
outlined under Test Procedures
and replace if defective.
5. Clean sensing module windows
with detergent and a brush.
1. Replace amplifier board (Item
A, Figure 4) and re-calibrate.
2. Replace complete Front Panel
Assembly containing Digital
Display Indicating Lights, etc.
3. Inspect Leads and connecting
wiring for breaks.
4. Replace measurement detector.
1. Replace Source Lamp in Sensing
Module.
2. Replace amplifier PC board (Item
A, Figure 5) and recalibrate.
3. Replace complete Front Panel
Assembly.
4. Clean Sensing Module Windows
with detergent and a brush.
Page 6