Troubleshooting
(continued)
21
CONTROL PANEL and OZONE GENERATOR – HDO
3
-I
PROBLEM/SYMPTOM
POSSIBLE CAUSE
SOLUTION
Fan not operating
- Fan obstructed
- Remove obstruction
- Main mother board not operating
- Check main power, check fuses.
Repair or replace as required
- Fan inoperable
- Replace fan
Unit flooded with water - Defective check valve
- Assess damage, repair as required,
replace check valve
- Vacuum break flapper valve stuck
- See ‘Maintenance Procedure’ – Annual
- Hydraulics out of adjustment
- See 'Start-Up & Calibration'
Ozone smell detected from or - Insufficient vacuum at venturi
- See 'Start-Up &Calibration'
near ozone generator - Loose internal fittings
- Check all fittings, tighten as required
- Defective O-ring seals in reaction chamber
- Check & replace as required
- Defective dielectrics
- Check & replace as required
CONTROL PANEL and OZONE GENERATOR – HDO
3
-II and HDO
3
-III
PROBLEM/SYMPTOM
POSSIBLE CAUSE
SOLUTION
‘Feed Gas Flow Rate’ meter out of
- No feed gas flow rate,
- Air preparation system not operating
adjustment (Control Panel)
High feed gas flow rate or
correctly. See air preparation section
Low fee gas flow rate
above
- Make adjustments with the ‘Feed gas
Flow Rate’ needle valve and the ‘Ozone
Injector - Vacuum Control’ knob
- ‘High Pressure-Side Water’ and ‘Low
Pressure –Side Water’ gauges have
Equalized. Excessive backpressure
downstream of the ozone injector or
HDO3 system.
- HDO3-III only: ‘Ozone Generator -
Pressure’ gauge is too high. Slightly
open the ‘Ozone Injector – Vacuum
Control’ knob, then adjust the ‘Feed Gas
Flow Rate’ meter
‘Ozone Generator – Vacuum’ not
- High vacuum
- Slightly open the ‘Ozone Injector-
within Operating parameters (Control
Vacuum Control’ knob, then adjust the
Panel, HDO3-II only)
‘Feed Gas Flow Rate’ meter
- Low vacuum
- Slightly close the ‘Ozone Injector-
Vacuum Control’ knob, then adjust the
‘Feed Gas Flow Rate’ meter
• Defective injector check valve
- Replace injector check valve
• No water in vacuum break
- Fill vacuum break with water, see ‘Start
Up & Calibration’
• Off-gas vent restricted
- Clean Off-gas Vent
• Defective O-ring seals in reaction chambers - Check and replace as required
• Loose internal fittings
- Check all fittings tighten as required
• Defective dielectrics
- Check and replace as required
‘Ozone Generator – Pressure’ not
- High Pressure
- Slightly open the ‘Ozone Injector-
within Operating parameters (Control
Vacuum Control’ knob
Panel and Ozone Generator cover,
- Low Pressure
- Slightly close the ‘Ozone Injector-
HDO3-III only)
Vacuum Control’ knob
• Defective O-ring seals in reaction chambers - Check and replace as required
• Loose internal fittings
- Check all fittings tighten as required
• Defective dielectrics
- Check and replace as required
