Troubleshooting guide

MAGNUM VERSION 8 MANUAL REVISION 3.1
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 RS485 CHANGED – Generated when a user makes changes to the RS485 address through the
Keypad/Display.
 CF CARD INSERTED – Generated when a user inserts a Compact Flash memory card into the
Magnum.
 CF CARD REMOVED – Generated when a user removes a Compact Flash memory card from the
Magnum.
Automatic Alarms 8.1.3.
The following alarms indicate an action that the Magnum made automatically:
 ROTATED LEAD – Generated when the Magnum automatically rotates the Lead Compressor.
 DAYLIGHT SAVINGS – Generated when the Magnum automatically changes the real time clock to
adjust for Daylight Savings Time.
8.2. Magnum System Alarms
Configuration Alarms 8.2.1.
These alarms indicate a problem with the configuration file in the system. The system is not operational and a
new configuration must be transmitted to the unit through MCS-Connect.
 INVALID CONFIG – Checksums are incorrect.
 INVALID CFG VER – The version number of the configuration is invalid.
 INVALID CFG TYPE – The configuration type does not match the software type.
MCS Local Network Alarms 8.2.2.
These alarms indicate problems with the MCS local network:
 LOST SI COMM #_ / LOST RO COMM #_ - Generated when communications to a Sensor Input or
Relay Output board is lost. The number of the board will be displayed with the alarm. The system can
be accessed but will be in a NO RUN- I/O LOST state.
 MCS-STAT OFFLINE – The Magnum has lost communications to the MCS-STAT.
 LOST IO SHUTDOWN – Generated when Magnum is running and there are no communications to
one or more of the I/O boards. The system can be accessed but will be in a NO RUN- I/O LOST
state.
 LOST I/O RESTART – Generated when the Magnum does an automatic reset once I/O
communications are restored.
Key Sensors Alarms 8.2.3.
These alarms indicate a problem with a key sensor, it is either shorted or open. The alarm will contain ALARM
followed by the 10-character name of the sensor. The following sensors related to the entire system are
tested:
 Leaving temperature: If failed, then Lock Out the system.
 Returning temperature: If failed, then alarm only no Lock Out.
 Ambient temperature: If failed, then alarm only no Lock Out.
The following compressor sensors are tested. If they fail, then that compressor only is locked out:
 Suction pressure and temperature
 Discharge pressure and temperature
 Oil pressure and temperature
 Motor temperature (if an analog input)
Emergency Stop Alarm 8.2.4.
 EMERGENCY STOP – Generated when the emergency stop switch has been turned on. The
system can be accessed but is in a Lock Out state.
8.3. Setpoint safety alarms
The Magnum algorithm incorporates a number of safety checks, based on Setpoints, preventing unsafe conditions that
could potentially cause damage to the system. When a safety trips the circuit will be in a SAFETY TRIPPED state. The
circuit will remain in this state for the time in the ‘Safety Down Time (min)’ cell and then move to the CMP ANTICYCLE
or CMP IS OFF state where the compressor will be allowed to run again if required. If the same safety trip occurs again