Troubleshooting (Qualified Servicer Only)
17
HIGH ALTITUDE OPERATION
Because the air is less dense at higher altitudes, there is a possibility of nuisance arcing. To correct this condition:
1. Turn the unit OFF. Disconnect cord or turn off circuit breaker.
2. Remove the two screws securing the cover to the power tray and remove it from the unit. (The entire power sup-
ply tray may be removed from the cabinet by removing two screws from inside the cabinet.) Do not lose screws.
3. Locate the jumper terminal (Figure 18).
Figure 18
4. With needle nose pliers, carefully adjust the jumper settings from HIGH to MED. Ensure that the jumper is firmly
seated in the terminal.
5. Replace the power tray cover and secure it with the two screws.
6. Replace the access door and turn the unit ON.
This procedure will slightly reduce the output voltage, minimize arcing and reduce ozone production. If the condition does
not improve, repeat the above procedure and move the jumper setting from MED to LOW.
If there appears to be excess ozone, go through the following checklist:
Cause
Correction
Loose ionizing wire(s)
Replace loose wires
Excessively Dirty Cell
Clean as outlined in Maintenance
Damaged (bent) plates
Straighten or replace collector cell
Improper ground
Check ground.
Large pieces of foreign matter lodged bgetween plates
Remove
Very dirty insulators
Clean as outlined in Maintenance
Broken ionizing wires
Remove all pieces of broken wire(s)
Excessively bent or misaligned components due to mishandling
Straighten or replace collector cells
Externally broken or cracked insulators
Replace insulator
IONIZING-COLLECTING CELLECTOR CELL TROUBLE SHOOTING PROCEDURE