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T-362 4–8
Cd31 Stagger Start Offset Time (Seconds)
Cd31 displays the stagger start offset time, which is the amount of time that the unit will delay at start-up.
This allows multiple units to stagger their control initiation when all units are powered up together.
The eight possible offset values are: 0 (Factory Default), 3, 6, 9, 12, 15, 18 or 21 seconds.
Cd32 System Current Limit (Amperes)
Cd32 displays the current limit, which is the maximum current draw allowed on any phase at any time.
Limiting the unit’s current reduces the load on the main power supply. When desirable, the limit can be
lowered. Note, however, that capacity is also reduced.
The five values for 460 VAC operation are: 15, 17, 19, 21, or 23 amperes. The factory default setting is
21 amperes.
Cd33 Humidity Setpoint
Cd33 controls dehumidification along with setting the relative humidity value in percent that will trigger
dehumidification. Relative humidity is detected with a humidity sensor and this sensor reading can be
viewed at Cd17. There are configuration variables that determine whether dehumidification capabilities
are installed. Note: Humidification was once available but no longer supported.
Cd33 has the following values / settings:
• “XX” - lower humidity setpoint
• “dISbL” - This disables dehumidification entirely; the humidity sensor is removed from the logic.
Humidity sensor variable CnF04 is set to OFF. This is available with software revision 5374 and
higher. Refer to Disabling the Humidity Sensor procedure in
Section 7.20.1
for detail.
• “tESt” - Dehumidification test can be run. Setpoint will be temporarily set to 1%, during the test. After
5 minutes, the normal setpoint is restored.
• “OFF” - Turns off dehumidification.
• “XX” - upper humidity setpoint
If Pre-Trip Inspection is initiated, Cd33 will be set to “OFF” automatically.
If CnF50 Enhanced Bulb Mode Interface is active, then Cd33 will show instead Cd48 Dehumidification /
Bulb Cargo Mode Parameter Selection.
Cd34 Economy Mode (On-Off)
Cd34 displays the current state of the Economy Mode option, “-----”, On, or OFF.
CnF22 determines whether Economy Mode offered. Economy Mode is a user selectable mode of
operation provided for power saving purposes.
Cd35 Bulb Mode
Cd35 displays the current state of the Bulb Mode option, “-----”, nOr, or bULb.
Bulb Mode is an extension of dehumidification control (Cd33). If dehumidification (CnF04) is set to “Off,”
Cd35 will display “Nor” and the user will be unable to change it. CnF28 determines whether the Bulb Mode
selection is offered.
After a dehumidification setpoint has been selected and entered for code Cd33, the user may then change
Cd35 to “bulb.” After Bulb Mode has been selected and entered, the user may then utilize function codes
Cd36 and Cd37 to make the desired changes.
If CnF50, Enhanced Bulb Mode, is active then Cd35 will instead show settings for Cd48.
Table 4–4 Controller Function Codes
Code Description