9
TROUBLESHOOTING GUIDE
PROBLEM
POSSIBLE CAUSE
CORRECTIVE ACTION
A. Control switch on,
1. Defective lamp.
1. Replace lamp.
indicator lamp off,
2. Faulty connection to lamp.
2. Check connection to lamp.
air mover operates.
3. Loss of high voltage.
3. Check power pack.
B. Control switch on,
1. Air mover faulty.
1. Replace air mover.
indicator lamp on,
2. Foreign object locking
2. Clean foreign object from
air mover does not
air mover.
air mover.
operate.
3. Faulty control switch.
3. Replace control switch.
4. Connector not properly
4. Check connection at
connected (at control
control switch.
switch).
C. Control switch on,
1. Unit is not plugged in.
1. Plug unit into 115 VAC
air mover and lamp off.
receptacle.
2. Safety interlock switch
2. Engage safety interlock
not engaged.
switch.
3. Safety interlock switch
3. Replace safety interlock
defective.
switch.
4. Control switch defective.
4. Replace control switch.
D. Air mover operates on
1. Control switch defective.
1. Replace control switch.
low or high speed only.
E. Poor air quality.
1. Unicell dirty.
1. Clean unicell.
2. Unicell malfunctioning.
2. Check unicell for:
a. Foreign matter between
plates
b. Ionizer wire loose or
broken
c. Defects in insulators
3. Unicell installed
3. Install unicell as shown
backwards or upside
in Figure 1.
down.
4. High voltage contacts
4. Clean high voltage
dirty.
contacts.
5. Unit being operated on
5. Increase air mover speed.
too low a speed.
6. Placement of unit not
6. Contact your local
creating a good air
distributor or United Air
pattern.
Specialists.
F. High voltage output
1. Loss of input 115 VAC.
1. Determine loss of input
low or zero.
voltage.
2. Unicell malfunctioning.
2. Check unicell for:
a. Foreign matter between
plates
b. Ionizer wire loose or
broken
c. Defects in insulators
3. Power pack defective.
3. Replace power pack.
*Refer to Wiring Diagram and Illustrated Parts
