Troubleshooting guide

MAGNUM VERSION 8 MANUAL REVISION 3.1
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In the Compressor SI screen the active compressors information is to be completed as normal, while
only the Suction Pressure and Suction Temperature must be entered for the tandem EXV. The different
suction temperature provides separate control for the tandem EXV.
7.43.4.2. Example: Two Compressors with Four Steps and Tandem EXV’s
In the General Information panel of the MAG V8 screen enter the number of compressors and steps:
In the Circuit Base screen the base compressor information will be entered. The active compressors
information is to be completed as normal and the tandem EXV information will be provided as needed.
Note the Type of LLS cell must be ‘EXV&LLS’ for the active compressor and ‘EXV only’ for the tandem
compressor.
In the next section the EXV Output cell must be set up for all the EXV’s
In the next section the active compressor is associated with its tandem EXV in the ‘Tandem EXV Circuit
#’ cell. Circuit #1 ties to circuit #3, and circuit #2 ties to circuit #4 (circuits #3 and #4 are the Tandem
EXV’s). The Suction Group cells are 1, 2, 3, and 4 respectively.
In the Compressor SI screen the active compressors information is to be completed as normal, while
only the Suction Pressure and Suction Temperature must be entered for the tandem EXV’s. The
different suction temperature provides separate control for the tandem EXV’s.