York YD Mod D, Operation Manual, Page: 109 / 160

Maintenance screen
Figure 44: Maintenance screen
This screen displays the pertinent parameters associated with maintenance. The technician can use
this screen to view, set, and acknowledge the maintenance schedule and tasks.
Table 107: Display only fields
Field/LED name Description
Day Since Last Quarterly Service
Displays the number of days that passed since the quarterly maintenance was
performed.
Days Since Last Yearly Service Displays the number of days that passed since the yearly maintenance was performed.
Operating Hours Since Last Yearly
Service
Displays the number of operating hours that passed since the yearly maintenance was
performed.
Days Since Last 3 Year Service
Displays the number of days that passed since the 3 year maintenance was
performed.
Table 108: Programmable
Button Access level Description
Condenser Small
Temperature
Difference
Warning
Threshold
Service level and
above
Displays the condenser small temperature difference warning threshold setpoint.
Use this to adjust the setpoint range from 6.0°F minimum to 30.0°F maximum, with a
default of 6.0°F.
Quarterly Service
Warning
Test Op
Use this to enable or disable the Quarterly Service Warning feature. A service warning
appears in System Details line when the quarterly service is due. The warning clears
when you press the Maintenance Acknowledge button and enter code
0726
.
Yearly Service
Warning
Test Op
Use this to enable or disable the Yearly Service Warning Feature. A service warning
appears as yellow in the System Details line when the quarterly service is due. The
warning clears when you press the Maintenance Acknowledge button and enter code
0726 .
109 Model YD Mod D with OptiView Control Center