AE14-5 Series Installation Manual

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14
TROUBLESH OOTING
IO-AE14-5
Table 5 Troubleshoong Guide
Problem Probable Causes Remedy
Unit does not
funcon correctly.
Power light and
performance
indicator light
are OFF.
System fan is not on. Turn system fan on.
Wiring improperly connected.
Check wiring or verify that plug is inserted in
receptacle and receptacle is powered.
Defecve power switch.
Check power switch for connuity with ohmmeter.
Replace if defecve.
Defecve safety interlock.
Remove door and press safety interlock with a
screwdriver. If lights come on, bend interlock lever
towards front and close door.
Unit does not
funcon correctly.
Power switch light is
ON and performance
indicator light is OFF.
Short in cells due to:
1. Broken ionizing wire.
2. Large parcles wedged between cell plates.
3. Cells washed recently and are sll wet.
4. Cell end plate insulator is dirty or damaged.
5. Cell plate(s) are bent.
1. Remove wire or wire fragments. Replace.
2. Shake large parcles out or wash cell.
3. Allow cells to dry completely.
4. Clean or replace end plate insulator.
5. Straighten plates with pliers.
Defecve performance indicator light.
Determine whether high voltage is present by tesng
power board ② If voltage is present, replace
performance indicator light.
Defecve power board.
Adjust high voltage potenometer on power board
counter-clockwise. If high voltage is not present,
replace power board.
Air Proving Switch (APS) sensor is
burnt out.
Remove power box lid and blow lightly for 10
seconds on APS sensor at boom of power box.
If light does not come on, replace APS.
Air Proving Switch is not geng enough airow
across the sensor.
Check that sensor is located in the plasc bushing
at the front of the power box.
Check that the return duct is installed ush to the
top and front edge of the air cleaner duct opening.
Ensure there is a minimum of 360 CFM of air to
the air cleaner.
O board 24V transformer is not working. Verify output of transformer. Replace if necessary.
Defecve power switch. Verify output of switch. Replace if necessary.
Power switch light is
OFF and performance
indicator light is ON.
Defecve power switch light. Replace power switch.
Cell makes loud
hissing noise
or causes radio
interference.
Internal cell contacts are not touching plates. Test contacts and repair.
Copper contacts on high voltage tray not making
good connecon on cell.
With needle-nose pliers, gently pull contacts down
or replace contacts.