Troubleshooting guide

MAGNUM VERSION 8 MANUAL REVISION 3.1
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Compressor information (all active compressors will be displayed):
 State - Compressor number and state. The default Compressor number can be changed in MCS-Config with a 3
character entry in the “Comp Name/ID” column of the Circuit Base screen.
 Time - Time spent in current state. If the state is CMP ANTICYCLE time will count down to zero.
 Oil Diff - Oil differential pressure. It is calculated as follows:
Centrifugal compressors: Oil Pressure – Pre-oil Filter Pressure
 FLA % - Full Load Amps based on the compressor’s respective Setpoint.
 Steps - Indicates number of steps associated with this compressor that are turned on.
 Lead? - YES will be displayed for the lead compressor.
 Staging – This field will display “VANES” for centrifugal compressors
 Lift Temp – If an Inlet Pressure sensor is specified in the configuration, then this value will equal Saturated
Discharge Temperature – Inlet PSI (converted to temperature). If no Inlet Pressure sensor is present, this value will
equal Saturated Discharge Temperature - Saturated Suction Temperature.
 Lift ROC’s – Current lift Rate Of Change/ Last lift Rate Of Change
 Amp/Lift Surges – This field is a counter for the number of amp and lift surges respectively.
Compressor Superheat information:
 Suction Temp - Compressor number and Suction Temperature, if available.
 Saturated Suction - Calculated Suction Saturated Temperature (R22, R134a, R407c, and R410a are supported).
 Suction Superheat - Calculated Suction Superheat, only available if both the Suction Temperature and the
Suction Pressure are used. Suction Superheat = Suction Temperature - Suction Saturated Temperature.
 Disc Temp - Discharge Temperature, if available.
 Saturated Discharge - Calculated Discharge Saturated Temperature (R22, R134a, R407c, and R410a are
supported).
 Disc Superheat - Discharge Superheat is available only if both the Discharge Temperature and the Discharge
Pressure are used. Discharge Superheat = Discharge Temperature - Discharge Saturated Temperature.
 Ref Type – Refrigerant type used.