Maintenance - Aprilaire 1710A Installation & Owner's Manual

Red lED Codes
Number Failure
of blinks Fault Type Mode Failure Condition
1 Non-Critical Internal RH sensor open or
RH sensor shorted.
fault.
2 Critical Internal Temperature sensor open
temperature or shorted.
sensor fault.
3 Non-Critical Model 76 Model 76 Remote
Remote Control not
Control communicating with
fault. dehumidifier.
4 Critical Insufficient After 20 minutes of
capacity. compressor operation, the
frost sensor temperature
is not at least 5°F below
the inlet air temperature.
5 Non-Critical Inlet air Internal temperature
temperature sensor reads out of
out of 50°F –105°F range for
range. compressor operation.
NOTE: If compressor is
on when fault condition
occurs, the compressor
will turn off. If the
compressor is not on
when the fault condition
occurs, there is no fault.
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Action
1. Check connection between sensor
board and control board.
2. If connection okay, replace sensor
board, Part No. 4752.
1. Check connection between sensor
board and control board.
2. If connection okay, replace sensor
board, Part No. 4752.
1. C heck connections between Model 76
and dehumidifier control board.
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, the
problem is 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 control board.
2. Remove the side panel (when facing
side of unit, on/off switch will be on
left) and verify the temperature sensor
is not damaged, is fully inserted in the
sensor well, and the well is filled with
thermal paste.
3. If the sensor is not damaged and
positioned correctly, contact Technical
Support.
1. Circulate air through the unit by setting
the Cycle Period to 1 hour and Cycle
Time to 60 minutes. After a minimum
of 10 minutes, cycle power to the
dehumidifier.
2. I f fault persists, call Technical Support.
Red lED Codes (continued)
Number Failure
of blinks Fault Type Mode Failure Condition
6 Critical Frost sensor Frost temperature sensor
failure. open or shorted.
7 Non-Critical Float switch Open circuit between
open. float switch inputs.
A critical fault can be cleared by repairing the fault and cycling power to the dehumidifier. A non-critical
fault can be cleared only by repairing the fault.
Test Mode
At the end of test mode (3 minutes of DEH Fan + 1 minute of Compressor ON & DEH Fan), the Red and Green
LEDs will turn ON and OFF alternately until the knob has been turned away from "TEST".

MAINTENANCE

AIR FIlTER
Under normal circumstances, the filter in the dehumidifier should be cleaned or replaced once a year.
A clean filter is necessary to prevent damage to the dehumidifier and allow it to function at full capacity.
To remove the filter, first unplug or disconnect power to the dehumidifier, then remove the air filter
via the access panel on the side of the dehumidifier. To clean, flush with warm water and detergent
solution. After a clean or new filter is reinstalled, replace the access panel and reconnect power to
the dehumidifier. The replacement filter for the dehumidifier is Model 4510 and is available from most
HVAC contractors in your area or Aprilaire.com
DRAIN
The drain trap or outlet should be checked and cleaned of debris annually.
NOTE: The drain trap needs to be primed with water prior to start-up and after extended periods of unit
shut down (winter months). See Figure 2.
Action
1. Check the frost sensor connection at
the control board.
2. Remove the side panel (when facing
side of unit, on/off switch will be on
left) and verify the temperature sensor
is not damaged, is fully inserted in the
sensor well, and the well is filled with
thermal paste.
3. If the fault persists, contact Technical
Support.
1. E mpty the condensate pan.
2. Check the float switch connection at
the control board.
3. I f not using float switch, verify jumper
is between float switch terminals on
dehumidifier control board.
4. If the problem persists, replace the
float switch.
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