17
Dymax EC-Series Flood Lamps for UVCS Conveyors User Guide
Table 1. Troubleshooting Chart for EC Flood Lamps
Problem
Possible Cause
Testing
Corrective Action
Bulb Will Not
Ignite
or
Bulb Flickers,
Won’t
Maintain
Operation
Improperly fastened
connections
Visually inspect all connections to
and from the Power Supply.
Secure all connections.
Main Line Fuses blown
Remove Fuses from Power
Receptacle and check with an
Ohmmeter.
Replace Fuses, if defective.
Corroded Lamp Bases
Visually inspect the Lamp Bases
for any signs of corrosion.
Replace the Lamp Bases if corrosion
exists (both Lamp Bases should be
replaced at the same time).
Bulb beyond useful life
Replace Bulb with (known) good
Bulb and re-test.
Replace Bulb if defective
(typical Bulb life = 2,000 hours).
Power Supply Board
failed
Check UV output voltage on
power supply board. Set
Oscilloscope to: 20ms/div
100V/div
Expected value 290-340 Vrms
Square Wave. Replace Power
Supply Board if defective.
Igniter malfunctioned
Verify open circuit voltage from
igniter. Set Oscilloscope to:
50us/div 1000V/div
Expected value 4-5 KV ignition
pulse superimposed on the
square wave. Replace if
defective.
Unit Blows
Input Fuse
Malfunction in the
Power Supply Board
Remove power. Disconnect the
Lamp/Reflector Assembly from
the Power Supply. Replace the
Fuse. Apply power. If Fuse blows,
Power Supply is defective.
Replace the Power Supply Board.
UV Intensity
Appears To
Be Low
Bulb beyond its useful
life
Use a Radiometer (Dymax ACCU-
C
AL™
50) to measure actual
output intensity. Consult manual
for proper output.
Replace Bulb if beyond useful life
(typical Bulb life = 2,000 hours).
The Quartz Envelope on
Bulb is contaminated
Visually inspect the Bulb for signs
of contamination (the Quartz
Envelope must be free from any
contamination).
Clean the Bulb with a soft, lint-
free cloth and isopropyl alcohol.
Bulb may need to be replaced if
contamination is burned into
Quartz Envelope.
Surfaces of the Reflector
may be contaminated
Examine the Reflector surface for
contaminants. It should be a
clean, shiny surface.
Clean the Reflector with a soft,
lint-free cloth and isopropyl
alcohol, or equivalent.
Short Bulb
Life
Bulb is overcooled (5000
UVCS and SideCure)
Verify that reflector temperature
is between 115°F and 145°F.
Install ventilation control plates
as described in this manual.
Degraded Lamp Bases
Visually inspect both Lamp Bases
and the electrical contacts on
each end of the Bulb. The Lamp
Base and the electrical contacts
on each end of the Bulb should
show no corrosion or evidence of
arcing.
Replace Lamp Bases as described
in this manual.
