9
Maintenance continued...
Reverse procedure when replacing sleeve.
When replacing quartz sleeve after cleaning, the sleeve should stick out about 1cm
at each end. Place o-ring over closed nut end and fit closed nut, fastening it hand
tight. Hold the other end of the sleeve in position during the tightening with the
other hand, then fit open end o-ring and cap.
A tiny amount of silicon spray or CRC in the end of aluminium endcap threads will
aid easy tightening. Do not use excessive force when tightening nuts. Do not re-
use quartz sleeve or o-rings if damaged.
Water Quality
Where the water being pumped contains unusually high levels of dissolved solids
(hard water), iron, manganese or biological organisms, a deposit build up on the
quartz sleeve may occur over time. This will compromise the effectiveness of the
UV system and the sleeve should be cleaned as required to maintain it in a clean
condition. Discoloured water will reduce the effectiveness of the UV system and
filtration should be installed.
Lamp Alarm System
If the UV lamp is out due to a failure or bad connection the alarm buzzer will sound
and the red LED will light and the alarm contacts will changeover. These are able
to close a normally open solenoid valve. The alarm function can be checked by
switching the unit off, disconnecting the lamp and then switching the unit back on.
The lamp should be replaced after a year’s running time. The alarm will beep
intermittently after the internal clock has measured this time as a reminder to
change the lamp. Pressing the recessed ‘reset’ button witha ballpoint pen will
silence it for 24 hours at a time to allow time for a new lamp to be obtained. Once
a new lamp is installed press the reset button for 5 seconds to start another year’s
timing. Do this whenever a new lamp is installed. The alarm light flashes slowly
during normal operation to show the timer circuit is running.
Trouble Shooting
Principle. A ballast (choke) provides the correct voltage and current for the
lamp(s). The circuit board monitors the current to the lamp and if it is not present,
illuminates the red alarm light and sounds the alarm buzzer (a “squealing” noise).
An orange light indicates the power is on.
a) UV LAMP OUT, NO ORANGE “ON” LIGHT, NO ALARM
1. No mains voltage.
2. Internal fuse failed.
3. Check mains power connections inside power supply.
b) UV LAMP FLICKERING, ALARM ON
1. Failed lamp.
2. Incorrect lamp or ballast fitted.
