AE14-5 Series Installation Manual

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12
TROUBLESH OOTING
IO-AE14-5
MODEL
Max. Voltage on
Plates (KVDC)
Max. Voltage on
Ionizer (KVDC)
AE14-1620-51
AE14-1625-51
4.8 - 5.3 (HV1) 7.2 - 8.0 (HV2)
AE14-2020-51
AE14-2025-51
4.8 - 5.2 (HV1) 7.2 - 7.8 (HV2)
Table 4: Power Board Voltage Sengs (with load)
The voltage will be higher without the cells in the unit.
③ Tesng Air Proving Switch (APS)
The APS sensor must sit in the plasc bushing to operate
correctly. The sensor is very sensive and operaon may
be aected by cold ambient temperatures, an HRV/ERV,
or a fresh air duct connected to the return air duct just
upstream of the air cleaner.
The APS uses a triac in its output circuit, which aects the
voltage sine wave. Measuring voltage with a regular digital
voltmeter may give a false reading. To check the output
from the APS, use a true RMS (root mean square) meter to
measure the output at terminals 1 and 4 of the APS. The
output should be between 102 and 115 VAC or 205-230
VAC, depending on the airow across the sensor
When the air cleaner is turned on without airow, the APS
sensor heats up, and aer 20-30 seconds opens the circuit
to turn OFF the power board. When the fan starts up (the
sensor is cooled), the circuit will close, the power board is
turned on, and the performance light will come on within
a few seconds.
The light on the power switch will be lit even when the
APS is open.
If the power board fails to come on with the fan on, check
that the sensor is properly seated in the boom of the
plasc bushing, in the front of the power box. To check the
APS for proper operaon remove the collecng cells, turn
the unit ON without the fan on. The power board should
come on immediately, and then turn OFF in 20-30 seconds
as the sensor heats up. To check sensor, blow directly on
it lightly. This should acvate the power board within 10
seconds. Service the sensor carefully. The sensor leads
are live. If the APS does not turn the power board and
performance indicator on, by-pass the APS by placing a
jumper between wires 3 & 4 on the APS. This removes the
APS from the circuit.
Note: If the airow through the air cleaner is less than
360 CFM, the APS sensor may not have enough airow
to acvate the air cleaner. In very low airow applicaons,
the air cleaner may need to be controlled by wiring it to
the EAC contacts on the system control module. In this
case, the APS must be disabled by connecng terminals
3 and 4 together.
See Wiring secon for informaon on how to wire the
air cleaner to the EAC contacts on the furnace or air
handler control module.
If there are no EAC contacts on the system control
module or they are not powered on low speed then a
relay will have to be installed to acvate the air cleaner
when the fan starts. The APS will have to be disabled.
④ Tesng the 24 V Transformer
1. Remove power box cover.
2. Disconnect the leads of the 24 V transformer from the
power board. See Fig. 5. Do not short leads.
3. The air cleaner should be ON. The system fan should
be running on high speed. The access door should be
closed.
4. Measure voltage across the leads with a voltmeter.
Voltage should read 25 - 28 VAC.
5. If no voltage is present, check operaon of the APS.
6. Reconnect leads to the power board.
7. Replace power box cover.
⑤ Seng Voltage of Power Board
High voltage can be adjusted with high voltage
potenometer if required. See Table 4 below.