Troubleshooting; Diagnostic Codes - Aprilaire E080 Installation And Owner's Manual

immediately after the call has been satisfied . When an
external control is installed, the Secondary Zone will be
sampled once per hour if there has not been a call for
dehumidification from the Primary Zone .

TROUBLESHOOTING

Technical support is available Monday through
Friday 7:00 a . m . to 5:00 p . m . CST at (800) 334-6011 . Use
the guides on the following pages to identify and
correct system faults . Contact Technical Support
before replacing the unit or any components and for
additional troubleshooting .
Table 1: Diagnostic Codes
Diagnostic
Code Failure Mode
E1 Internal Humidity
or Temperature
Sensor Open or
Shorted
E2 High
Refrigeration
Pressure
E3 Model 76
Remote Control
Communication
Loss
E4 Insufficient
Capacity
18 English
1 . Cycle power to clear error code .
2 . If error code reoccurs, replace User Interface, Part No . 5445 .
1 . Verify that the fan works, the backflow damper swings freely,
and there is no blocked or restricted ductwork .
2 . If the fault persists, call Technical Support .
1 . Check connections between Model 76 and dehumidifier control
board . Terminals should be fully inserted and secured in the
control board and Model 76 control terminals .
2 . If connections are correct and secure, turn off the dehumidifier
and remove the Model 76 . Use a short section of 4-wire cable
to reconnect the Model 76 to the control board . Turn the
dehumidifier back on and increase the dryness level setting on
the Model 76 . If the dehumidifier turns on, a problem exists with
the wiring between the dehumidifier and control .
3 . If the dehumidifier does not turn on, call Technical Support .
1 . Check the frost sensor connection at the power board . The
terminal should be fully seated on the power board pins .
2 . Remove the side access panel and verify that the sensor is
secured to the suction line .
3 . If the sensor is connected and secured to the refrigeration line,
proceed to the next step .
4 . Reset the fault by cycling power to the dehumidifier .
5 . Turn the humidity setting down (below room/home humidity
level) to make a dehumidification call .

DIAGNOSTIC CODES

When an error occurs, the Diagnostic Code along with
SERVICE REQUIRED will be displayed on the control
screen .
Action Reset
Cycle Power
Cycle Power
Self-
Correcting
Cycle Power