SI TO (Selected Condition) – Generated when a user changes the condition of a Sensor Input (If a digital
input, then either AUTO, MANON, or MANOFF. If an analog input, then either AUTO or MANUAL. If
MANUAL, then a dialog box will appear to input the number value).
POINT INFO CLEAR – Generated when a user clears all point information (run times, cycles, min/max
values, etc.).
CLOCK SET – Generated when a user makes a change to the Magnum real time clock.
CFG DOWNLOADED – Generated when a user uploads a new confi guration fi le into the Magnum.
ETHERNET CHANGE – Generated when a user makes a change to the Ethernet settings through the
Keypad/Display.
21.2.3 Alarms generated by the control algorithm
The following alarms indicate that the control algorithm took action:
DAYLIGHT SAVINGS
guration fi le that has been loaded into the system. The system
is not operational, a confi guration must be transmitted to the unit form MCS-CONNECT or the confi g chip
must be replaced with a valid one.
INVALID CONFIG. (check sums are incorrect)
INVALID CFG VER (version number of the confi gurator is invalid)
INVALID CFG TYPE (the type does not agree with software, MHRC software with a home unit
confi guration)
These alarms indicate problems with the MCS I/O network, the system can be accessed but the system is in
a lock out state, LOST I/O.
LOST IO SHUTDOWN
This alarm indicate a problem with a key sensor, it is either shorted or open. The alarm will contain ALARM
followed by the 8-character name of the sensor.
The following sensors related to the entire system are tested:
Supply Air Temperature - if failure occurs unit is LOCKED OUT.
Ambient temperature - if failure occurs unit continues to run and alarm is generated.
The following compressor sensors are tested. If they fail that compressor only is locked out.
Suction pressure - if failure occurs compressor is LOCKED OUT.
Discharge pressure - if failure occurs compressor is LOCKED OUT.
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21.3.1.1 Confi guration problem alarms
These alarms indicate a problem with the confi
21.3.1.2 MCS I/O network problem alarms
21.3 MHRC MAGNUM system alarms
21.3.1 Alarms are generated by the MHRC MAGNUM control algorithm:
21.3.1.3 Sensors fault alarms
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