18
TROUBLESHOOTING UV SYSTEM
4. During the lamp inspection one of the UV
Controllers does not have (6) Green & (3)
Red indicator lights on and there is no
Yellow "UV Lamp Failure” lamp on.
A. The Yellow "UV Lamp Failure" light has
failed.
1. Check the Yellow "UV Lamp Failure" light and
see if it is receiving power.
a. If no, the problem is in the wiring.
Locate and correct the problem
b. If yes, replace the lamp.
2. If the Yellow "UV Lamp Failure" light has power,
replace the light.
B. The Connection from the 2A on the UV
Controller and the terminal blocks is broken
or loose.
1. It may be the contacts on the ballast
a. Check for power coming out of
terminal 2A in the ventilator
C. The contacts on the UV Controller has failed
to close.
1. Check for continuity between 2A and 3A at
ventilator. If a UV lamp has failed and there are
(6) green and (3) red lights on on the UV
Controller, the UV Controller needs to be
replaced.
5. Red “UV Safety Interlock Activated” light
on AND Audible Alarm on.
A. UV Access Door Switch (DS) has failed or
needs to adjusted.
1. Check for continuity between D1 & D2 and D3 &
D4 with the door switches depressed. If there is
2. If there is continuity check the UV Pressure
Switch and UV Proximity Switch.
B. An Extractor Insert has been removed or is
not properly inserted
1
Remove and re-insert Extractor Insert
C. Gaylord Extractor Monitor (GEM) has failed
1. Check for continuity between G1 and G2.
D. Pressure switch (PS) has failed or needs
adjusting.
1. Check for power to the UV Pressure Switch with
the fan on.
2. Check for continuity between P1 and P2. It
should be closed with the fan on
3. With the fan on turn the pressure switch
adjustment screw Clockwise until there is
continuity between P1 and P2.
4. If there is continuity, check the UV Access Door
Switch and the UV Proximity Switch
D. Pilot tube to sense air pressure is plugged.
1. Check the Pitot tube for blockage. Clear and
check again.
2. Check all tubing connections to make sure they
are tight.
E. Relay CR23 in ventilator has failed.
1. With Exhaust fan on, close Inspection (wash
access) doors and depress UV Access Door
switches. Check for continuity across the N.O.
contacts of CR23 in the ventilator. If there is
continuity, replace relay CR23.
F. Relay CR11 in CUV-100 has failed.
1. Check CR11 for proper operation, replace if
necessary.
6. Pressing "Cancel Audible Alarm" button
on CUV-100 does NOT silence alarm.
A. Timing Relay TR1 in CUV-100 is not set
correctly or has failed.
1. Check TR1 for proper operation and verify it is
set for 1 second.
B. Relay CR10 in CUV-100 has failed.
1. Check Yellow “UV Lamp Failure” lights. Identify
which ventilator section(s) has the same light
on. If it is on, see above for solution.
7. Audible alarm comes on for
approximately 60 Seconds each day
when "Start Fan" button is pressed.
A. Timing Relay TR2 in CUV-100 is not set
correctly or has failed.
1. Check TR2 for proper operation and verify it is
set for 60 seconds.
SYMPTOM
POSSIBLE PROBLEM
CORRECTIVE ACTION
