Technical information

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evaluate cells at no charge and provide free repair estimates. This is highly recommended before
untrained personnel attempt repairs. Please contact Air Quality Engineering at 1-800-328-0787 for
assistance.
Indicator light is NOT on
Check to see if the wash system is operating. The indicator light should not be lit when the wash system
is activated.
Check to see if the cell access door is closed properly. The indicator light will not be lit if the door is open
and the electronic cells will not be energized.
Be sure the electrical connections have been made properly per Figure 10 & 11, particularly that a lead
was made from the fan motor to terminal 16A on the sequence controller. This supplies power to the
sequence controller when the fan is operating which in turn supplies power to the power supply.
Remove the electronic collector cell(s) and close the door. If the light comes back on, there is a short in
at least one collector cell. A short can be a result of the cell(s) being excessively dirty, a large piece of
contaminant shorting the fins, or a physical damage such as a collector fin being bent out of shape and
touching an adjoining fin. The wash cycle may be run to clean the cells if they appear dirty. Visually
inspect the cell for large particulate that may be bridging two adjoining collector fins or for physical
damage. If damage is identified, repairs should only be performed by trained personnel as improper
repairs may result in unrepairable damage. Please contact Air Quality Engineering, Inc. at 1-800-328-
0787 for assistance. Cells may be returned for free repair estimates.
If the indicator light does not come on with the cells removed and the door closed, use a voltmeter to
confirm that there is indeed voltage at the input of the power supply. If there is voltage at the power
supply, but no indicator light, the power supply should be replaced. The indicator light itself has a very
low failure rate.
Water not Flowing
There are two valves in series. The first valve (the one on the left) is an open/closed valve while the
second valve is a flow control valve (meaning its positions are fully open/partially open). Check to make
sure the first valve is getting energized (it is fail closed). One should hear a clicking from the solenoid
during as the sequence controller engages and disengages the solenoids. If this is not occurring one
could check this by manually taking apart the hot water solenoid, or a new assembly might have to be
installed.
Detergent not Flowing
During the wash cycle the valves should open and close allowing detergent to be pumped from the
container and sprayed from the manifold jets. If the detergent is not being sprayed check for the following:
If the detergent supply bottle is empty. If the detergent supply tube is restricted. If the detergent pump is
running. The detergent pump makes a significant amount of noise and should be audible while it is
running.
If the pump is not running, check to make sure it is receiving voltage, if not, the sequence controller has
an LED indicator for the detergent pump, if the LED does not light, sequence controller may need to be
replaced. If it does light, but pump does not run, the pump may need to be replaced.