Alarm messages and suggested actions
Displayed Alarm Message | Action Required |
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|
Air Block Interlock Open | • Verify that the air block panels are in place. |
| • Confirm that the wiring connections for the air block interlock switches are |
| secure. |
|
|
Air Filter Clogged | • Verify the condition of the return air filters, and replace them if required. |
| • Check the pressure drop across the filters by reviewing the System status. |
| • Ensure that the |
| • Verify that the ends of the |
| incorrectly. |
| • Verify that the correct filter is selected in the System Options menu (Path: |
| Main > Setup > System # > System Config > System Options). |
|
|
Airflow Low | • Ensure that any |
| • Ensure that any |
| • Verify that the mode delay is not too short. If the mode delay is too short, the |
| Airflow Low alarm will occur after |
| minutes. |
| • Check the pressure drop across the filters, and replace the filters if necessary. |
| • Check the pressure drop across the evaporator coil on the Pressures screen |
| of the display interface (Path: Main Menu > Status > [Module] > |
| Pressures). The reading should be close to the recommended coil differential |
| pressure drops indicated in the table “Coil Differential Pressure Values” on |
| page 32. If the reading is too low based on Module size and options installed, |
| adjust the blower speed. |
| • Verify the proper operation of the Variable Frequency Drive (VFD) and |
| blower motors. |
| • Verify that the VFD overload alarm is not active. |
|
|
Backup is Load Sharing | • A backup System is contributing to meet the room load. |
| • No action required. The backup will return to idle when the demand falls. |
|
|
Backup System Idle | • A primary System has come back online after a failover or |
| event. |
| • No action required. |
|
|
Backup System Online | • Indicates that a System failover has occurred. The backup System has come |
| online because another online System either failed or was commanded off. A |
| System Comm Loss alarm is considered to be a System failure if the Comm |
| Loss Failover configuration setting is Yes (the default setting). |
| • Check the event log to determine the cause of the primary System failure. |
|
|
Blower 1 Requires Maintenance | • Verify operation of Blower 1 and perform preventive maintenance. |
| • Reset the maintenance alarm for Blower 1 at the display interface. |
|
|
Blower 2 Requires Maintenance | • Verify operation of Blower 2 and perform preventive maintenance. |
| • Reset the maintenance alarm for Blower 2 at the display interface. |
|
|
Compressor 1 Requires | • Verify the operation of Compressor 1 and perform preventive maintenance. |
Maintenance | • Reset the maintenance alarm for Compressor 1at the display interface. |
|
|
Compressor 2 Requires | • Verify the operation of Compressor 2 and perform preventive maintenance. |
Maintenance | • Reset the maintenance alarm for Compressor 2 at the display interface. |
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NetworkAIR FM DX 60 Hz Operation, Maintenance, and Troubleshooting | 53 |