Emerson MODBUS 485 Manuel D’Utilisation

Air Temperature Control Sensor 

Sensor from which air temperature measurements will be used for cooling and 

heating control. 

Air Temperature Dead Band 

Value that is divided evenly to form a temperature range above and below [Air 

Temperature Set Point]. If measured air temperature is within this range, no 

heating or cooling will occur. 

Air Temperature Set Point 

Desired air temperature. This set point is dependent upon which sensor is 

selected for control. 

Auto Restart Delay 

If power is lost, the control will delay this amount of time after power is restored 

before restarting the unit. 

BMS Communications Timeout 

Building Management System (or external monitoring system) has not 

communicated with the system within the expected timeframe. 

BMS Timeout Period 

Timeframe within which the Building Management System (or external 

monitoring system) must communicate with the system to avoid a timeout.

Bottom Fan Issue 

The bottom fan is not operating within its normal parameters. 

Calculated Next Maintenance Month 

Calculated month of the next scheduled maintenance. Used in conjunction with 

[Calculated Next Maintenance Year]. 

Calculated Next Maintenance Year 

Calculated year of the next scheduled maintenance. Used in conjunction with 

[Calculated Next Maintenance Month]. 

Chilled Water Control Valve Failure 

Chilled water valve out of position. Chilled water control valve position does not 

match expected value. 

Clogged Air Filter 

Air filter is dirty and needs to be (cleaned or) replaced. 

Compressor 1 High Head Pressure 

Compressor 1 high head pressure. 

Compressor 1 High Pressure 

Transducer Issue 

Compressor 1 high pressure transducer is disconnected or the signal is out of 

range. 

Compressor 1 Hours Exceeded 

Operating hours for compressor 1 have exceeded the threshold. 

Compressor 1 Low Pressure Transducer 

Issue 

Compressor 1 low pressure transducer is disconnected or the signal is out of 

range. 

Compressor 1 Low Suction Pressure 

Compressor 1 low suction pressure. 

Compressor 1 Pump Down Issue 

Unable to pump down suction-side pressure during compressor 1 shutdown. 

Compressor 1 Short Cycle 

Compressor 1 short cycle. A short cycle is defined as turning on and off a 

number of times over a set time period. 

Condenser 1 Issue - Event Control 

Enable/disable the activation of the [Condenser 1 Issue] event. If set to 

'disabled', the event will not be annunciated. This implies that the event will not 

be placed in any active event list or in any event history list. 

Condenser 1 Issue - Event Type 

The event type for the [Condenser 1 Issue] event. 

Condenser 1 Issue 

Condenser 1 is not operating within its normal parameters. 

Condenser Circuit Unspecified General 

Event 

One or more unspecified condenser circuit events active. See local unit display 

for further details. 

Condenser Control Board Issue 

The condenser control board is reporting an issue. 

Condenser Fan Issue 

Condenser fan is not operating within its operational parameters. 

Condenser Fan Power 

Condenser fan's measured input power. 

Condenser Fan Speed 

Condenser fan speed expressed as a percentage of the maximum rated speed. 

Condenser Low Noise Mode - Full Days 

Days of the week selected for low noise mode full day scheduling. 

Condenser Low Noise Mode - Interval 

Days 

Days of the week selected for low noise mode interval scheduling. 

Condenser Low Noise Mode Max Fan 

Speed 

Maximum fan speed when condenser is placed in low noise mode. 

Condenser Low Noise Mode Schedule 

Control 

Enable/disable scheduled control of condenser low noise mode. 

Condenser Low Noise Mode Start Time 

The time of day at which the condenser will transition into low noise mode. 

Condenser Low Noise Mode State 

State of condenser low noise mode scheduler control.