Hydrotech DLR-4M_7M Ultraviolet Water Disinfection Unit - Manual (Page 20)

O & M Manual DLR-M, 4-7
08/05 – Rev. 6 20
Troubleshooting
Determining
problem The troubleshooting guide gives you suggestions for resolving problems.
If… Then…
The unit is leaking water • Ensure that the headpiece is tight.
• Verify that inlet water pressure is not >148 psi.
• Ensure that headpiece O-ring is seated properly.
• Lubricate O-ring (use food-grade silicone).
• Check O-ring for cracks or rips. Replace if necessary.
• Check quartz sleeve for possible cracks. If sleeve is cracked, call distributor for
replacement.
Glo-Cap is not lit or has
gone out • Verify that all electrical connections are correct.
• Replace lamp. If problem is solved, resume unit operation.
• If lamp still does not light, electrical control box may need to be replaced. Call distributor
for replacement information.
Poor bacterial
performance • Replace lamp if it is more than 365 days old or nearing the end of its lamp life.
• Perform routine maintenance.
• Check water quality. If water quality has changed then you may need to install filters or
other disinfection units to ensure that water supply does not exceed recommended
maximum concentration levels (shown in Step 1 of Pre-Installation Instructions).
• Verify flow rate using the flow rate table found in the Technical Specifications at the back
of the manual.
Power Failure • The unit will restart automatically and the internal Days counter will resume counting
down as before the power failure. The UV intensity will remain the same as before the
power failure, unless actual water conditions change. If the unit has an optional solenoid
valve installed, the valve will immediately open after power is restored to the unit.
• In the event of a system failure you must disinfect the system. Refer to maintenance
instruction on page 16 of this manual. “Sanitizing the system”.
Note: The unit is designed for continuous operation. Never connect the unit to a timer or other
device, which will cause the unit to cycle on and off. Excessive cycling of the power will
reduce lamp life.
Display screen is blank • Ensure that the unit is assembled and installed correctly. In the case of improper handling
or assembly during installation and/or servicing, the unit will turn off power to the lamp
and display a blank screen.
•
Check for damage to the lamp filament elements, quartz sleeve, or electrode connectors.
Applying power to a unit with such damage will cause a blank display screen. Damage
may be caused from shipping, overheating the lamp by operating the unit with no water in
the chamber, introducing debris into the unit from the water source, or improper handling
or assembly during service or installation.
Note: Units with the optional solenoid valve installed will turn off. In most cases, replacing
the lamp, and/or quartz sleeve will return the unit to proper operation. If the unit fails to
resume operation, notify your distributor.
Unit gives faulty alarms • The ballast or control circuit may be faulty. Call distributor for replacement information.
You miss the 5 second
window for resetting unit
and/or unit does not beep
or LED’s blink three
times • Disconnect the power for 30 seconds, and then reapply power. Within 5 seconds of
reapplying power press and hold the reset button for 5 seconds, As stated in the start-up
sequence on page 12. Do not release the reset button until the LED’s blink 3 times and the
alarm beeps 3 times.