Humidi- -Mizer System Troubleshooting - Carrier 48LC Series Controls, Start-Up, Operation And Troubleshooting

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Humidi- -MiZer System Troubleshooting
Use the SystemVut control display or a CCN device to view the
cooling status display and the cooling diagnostic display. See
Optional Humidi- -MiZer Dehumidification System starting on
page 19 for information on the cooling operation and the related
Humidi- -MiZer system operation. Check the current alarms and
alarm history for any cooling alarm codes and correct any causes
(see Table 13 on page 34). Verify any unique control
configurations per installed site requirements or accessories.
If alarm conditions are corrected and cleared, operation of the
compressors, fans, and Humidi-MiZer system valves may be
verified by using the Service Test mode (see Table 4 on page 11).
In addition to general cooling service analysis (Table 15 on page
37), see Table 16 (on page 39) for general Humidi-MiZer system
service analysis.
NOTE:
Wiring, operation, and charge are different on a
Humidi-MiZer system unit compared to a standard unit.
Activating Humidi- - MiZer System Operation After
Field Replacement of a SystemVut Controller
Humidi- -MiZer system operation is enabled as part of the factory
configuration of the unit. When field replacement of a SystemVu
controller is required, the replacement controller must be
field- -configured to control the Humidi- -MiZer system option.
Field activation of the Humidi- -MiZer system requires use of
Network System Tool Five and either i- -Vu
Tools 6.5 (field assistant tool).
NOTE: The i- -Vu software or i- -Vu Tools must be version 6.5 or
later. Earlier versions do not support the SystemVu controller.
Connect the computer with the required software to the installed
replacement SystemVu controller. Using Network System Tool
Five, navigate to the Properties screen (see Fig. 22). Enter the
Serial number from the unit nameplate into the Serial number field.
R 6.5 software or i- -Vu
38
Fig. 22 - - Network System Tools Five Properties Page
Next launch either the i- -Vu 6.5 software or the i- -Vu Tools 6.5
field assistant and navigate to the Properties page (see Fig. 23). Go
to the Service section and locate HUMIDI- -MIZER. Set the
following selections to Yes: Humidimizer En Status, Liquid Dischg
Valve CirA Enable, and Reheat Dischg Valve CirA Enable.
Fig. 23 - - i- -Vu Properties Page - - Service Section
a48--- 9930
a48--- 9940