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PRIMARY CIRCUIT WITH HVAC SYSTEM BLOWER OPERATING
• If there is no supply line voltage at the transformer input connections,
correct the fault at the dedicated power source or HVAC system power
source.
• If there is supply line voltage at the transformer input connections and
no output voltage (24 volts nominal), the transformer is defective and
must be replaced.
• If there is transformer output voltage (24 volts nominal) and no output
voltage from the ON/OFF switch, the outage can be located by checking
operation of the safety interlock switch and the interconnecting wiring
with a Multimeter. Refer to Circuit Diagram, (pg. 22) to check operation
of the switches.
PRIMARY CIRCUIT WITH HVAC SYSTEM BLOWER NOT OPERATING
Follow these steps to test for proper operation of the Power Supply Board,
ON/OFF Switch, and Safety Interlock Switch.
1. Ensure that the circuit controlling the HVAC system blower is in the OFF
position, and input power to the air cleaner is disconnected.
2. The power supply board has a built-in internal fuse to protect the 24V
transformer. The fuse can be checked visually by inspection. If the fine
wire inside of the fuse is broken, a fault exists in the 24V circuit. Do NOT
replace this fuse. The entire Power Supply Assembly must be replaced.
The purpose of the fuse in not to protect the power supply board, but to
function as a troubleshooting feature of the product and to protect the
transformer from damage.
3. If the fuse is NOT blown, check the ON/OFF switch and safety interlock
switch for proper engagement and operation. This can be completed
using a Multimeter with an OHM scale capable of reading 1.0 ohm.
4. Remove the fuse. Connect one Multimeter test lead to the test pin hole
(J9) located directly beside the wire that connects the ON/OFF switch to
the power supply board. Connect the other Multimeter test lead to the
fuse connection nearest the front panel.
5. Turn the ON/OFF switch to the ON position and depress the safety
interlock switch. The Multimeter should have the capability of reading
levels as low as 1.0 ohm. Multimeter reading of 1.0 ohm or less indicates
correct operation of the ON/OFF switch and the safety interlock switch.
6. If the Multimeter ohm reading is greater than 1.0 ohm, begin the process
of elimination by moving the Multimeter test lead from the test pin hole
(J9) to the safety interlock switch terminal with the blue wire lead.
Depress the safety interlock switch. If the reading on the meter is greater
than 1.0 ohm, the safety interlock switch is defective and must be
replaced. If the reading on the meter is less than 1.0 ohm, the ON/OFF
switch is defective and must be replaced.
Troubleshooting
21
High Altitude Operation
Because the air is less dense at higher altitudes,
there is a possibility of nuisance arcing in the
Electronic Air Cleaner. The homeowner can quickly
and easily correct this condition.
1. Make sure the HVAC System Blower is not
operating, the ON/OFF switch is in OFF position
and the circuit breaker is turned OFF or input
power cord is disconnected.
2. Remove the Front Panel Assembly.
3. Remove the cover from the Power Tray
Assembly by removing the two screws on top of
unit. (The entire Power Tray Assembly may be
removed from the cabinet by removing two
screws from inside the cabinet.)
4. Locate the jumper terminal.
5. With a pair of needle nose pliers, carefully
relocate the jumper settings from HIGH to MED.
Ensure that the jumper is firmly seated in the
terminal.
6. Replace the Power Tray Cover and secure it with
two screws.
7. Replace the Front Panel Assembly, turn circuit
breaker ON, reconnect input power cord and
turn ON/OFF switch 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 (M) to LOW (L).
This unit is produced at the factory with the jumpers
set in the HIGH (H) position. However, the output
voltage may be lowered in any situation where the
unit is arcing excessively or there is excessive ozone.
Operation
4
For Qualified HVAC
Installer Only