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Service Menu Parameters
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Figure 48 Setpoints screen, page 2 of 6
Humidity Setpoint—Selects a humidity that the cooling unit will maintain by removing or adding
moisture to the air. This parameter is adjustable from 20-80%. The factory default setting is 50%.
Humidity Control Type—Selects the humidity control calculation. Setting this parameter to
“Relative” will control the humidity without considering any temperature deviations. “Predictive” and
“Absolute” control consider the temperature deviation from temperature setpoint so that a constant
level of moisture is kept in the area based on the humidity sensor reading and the temperature
deviation from setpoint. The factory default setting is “Predictive” (see 3.6.2 - Humidity Sensor
Reading Control Types).
Humidity Proportional Band—Adjusts the activation points of the humidifier and compressors
based on the actual sensor values deviation from setpoint. The smaller this number the faster the
compressors and humidifier will increase capacity, too small of a number may cause the unit to short
cycle or overshoot setpoint.
Humidity Integration Time—Adjusts the capacity of the unit based on time away from setpoint so
that accurate humidity control can be maintained. If the integration time is set to 0, the humidity
control operates as a “proportional only” control. When an integration time is set the control mode
changes to “PI” control.
Humidity Deadband—Prevents overshooting of the setpoint and cycling between humidification
and dehumidification. The value entered in this field will be split in half by the temperature setpoint.
Example: If the humidity setpoint is 50% and a 4% deadband is set, then the dehumidification
proportional range will be from 52 to 57% and the humidification proportional range will be from 48
to 43%.
Dehum/Heat Low Limit 1—Sets the temperature at which one of two compressors will be
deactivated for dehumidification control. Unit must be set for two-compressor dehumidification for
this value to be settable. Example—If Low Limit 1 is set to 4°F (2.2°C) and the temperature setpoint
is 70°F (21.1°C) then one of the two compressors will turn off at 66°F (18.8°C).
Dehum/Heat Low Limit 2—Sets the temperature at which dehumidification is stopped.
Example—If Low Limit 2 is set to 8°F (4.4°C) and the temperature setpoint is 70°F (21.1°C) then all
dehumidification will be deactivated at 62°F (16.6°C).