48TC
Field Service Test mode has the following changes from normal operation:
S Outdoor air temperature limits for cooling circuits, economizer, and heating are ignored.
S Normal compressor time guards and other staging delays are ignored.
S The status of Alarms (except Fire and Safety chain) is ignored but all alerts and alarms are still broadcasted on the network.
Field Service Test can be turned ON/OFF at the unit display or from the network. Once turned ON, other entries may be made with the display or through the network. To turn Field Service Test on, change the value of Test Mode to ON, to turn Field Service Test off, change the value of Test Mode to OFF.
NOTE: Service Test mode is password protected when accessing from the display. Depending on the unit model,
The independent outputs (IndpOutputs) submenu is used to change output status for the supply fan, economizer, and Power Exhaust. These independent outputs can operate simultaneously with other Field Service Test modes. All outputs return to normal operation when Field Service Test is turned off.
The Cooling submenu is used to change output status for the individual compressors and the dehumidification relay. Compressor starts are not staggered. The fans and heating service test outputs are reset to OFF for the cooling service test. Indoor fans and outdoor fans are controlled normally to maintain proper unit operation. All normal cooling alarms and alerts are functional.
NOTE: Circuit A is always operated with Circuit B due to outdoor fan control on Circuit A. Always test Circuit A first, and leave it on to test other Circuits.
The Heating submenu is used to change output status for the individual heat stages, gas or electric. The fans and cooling service test outputs are reset to OFF for the heating service test. All normal heating alarms and alerts are functional.
Configuration
The
Unit
Start Delay
This refers to the time delay the unit will wait after power up before it pursues any specific operation.
Factory Default = 5 sec Range =
Filter Service Hours
This refers to the timer set for the Dirty Filter Alarm. After the number of runtime hours set on this point is exceeded the corresponding alarm will be generated, and must be manually cleared on the alarm reset screen after the maintenance has been completed. The timer will then begin counting its runtime again for the next maintenance interval.
Factory Default = 600 hr
NOTE: Setting this configuration timer to 0, disables the alarm.
Supply Fan Service Hours
This refers to the timer set for the Supply Fan Runtime Alarm. After the number of runtime hours set on this point is exceeded the corresponding alarm will be generated, and must be manually cleared on the alarm reset screen after the maintenance has been completed. The timer will then begin counting its runtime again for the next maintenance interval.
Factory Default = 0 hr
NOTE: Setting this configuration timer to 0, disables the alarm.
Compressor1 Service Hours
This refers to the timer set for the Compressor 1 Runtime Alarm. After the number of runtime hours set on this point is exceeded the corresponding alarm will be generated, and must be manually cleared on the alarm reset screen after the maintenance has been completed. The timer will then begin counting its runtime again for the next
maintenance interval. | Factory Default = 0 hr |
NOTE: Setting this configuration timer to 0, disables the alarm.
Compressor2 Service Hours
This refers to the timer set for the Compressor 2 Runtime Alarm. After the number of hours set on this point is exceeded the corresponding alarm will be generated, and must be manually cleared on the alarm rest screen after the maintenance has been completed. The timer will then begin counting its runtime again for the next maintenance interval
Factory Default = 0 hr
NOTE: Setting this configuration timer to 0, disables the alarm.
Cooling
Number of Compressor Stages
This refers to the number of mechanical cooling stages available on a specific unit. Set this point to “One Stage” if there is one compressor in the specific unit, set to “Two Stage” if there are two compressors in the unit, and set to “None” if economizer cooling ONLY is desired.
Factory Default = One Stage for 1 compressor units Two Stage for 2 compressor units
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