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seconds. The control will operate from the temperature sensed by the working
sensor.
E1 -- If the Display Module and the Equipment Control Module cannot
communicate via two-- wire connection, an E1 will be displayed.
E2 --ThereisnoE2errormessage.
E3 -- If Thermidistat Control cannot properly read outdoor temperature, and it is
needed for proper operation, display will indicate “----” in the outdoor
temperature location. If Option 06, 08, 09, 22, 23 or 44 is not set to OFF, display
will indicate “---- ” in the outdoor temperature location.
E4 -- If Thermidistat Control’s internal memory fails, E4 will be displayed.
Replace Thermidistat Control.
E5 -- If Thermidistat Control cannot properly read humidity, E5 will be
displayed. Replace Thermidistat Control. If both Humidify and Dehumidify
have been set to OF, the humidity value will be shown as “-- --” when viewed
from the humidity menu, but no E5 will be shown in the display.
Table 4 can be used as a troubleshooting tool for determining which outputs will
be active for a particular configuration and each operating mode.