YORK YK — Warning - Condenser - High small temperature difference

The control panel shows Warning - Condenser - High small temperature difference. The manuals print this wording for the message, and it is the only variant given. The manual describes it as a manual reset warning.

This warning is set when the condenser small temperature difference is greater than the condenser small temperature difference warning threshold. The threshold is a service programmable setpoint on the maintenance screen, and its default value is 8.0°F (4.4°C). One manual also prints the default as 6.0°F (3.3°C) and records that it was changed to 8.0°F (4.4°C). When the message appears, the condenser small temperature difference has exceeded this setpoint.

• The condenser small temperature difference is greater than the condenser small temperature difference warning threshold — a service programmable setpoint on the maintenance screen with a default of 8.0°F.

1. Open the maintenance screen and read the condenser small temperature difference warning threshold, which is set there as a service programmable setpoint.
2. Compare the current condenser small temperature difference with that threshold: the warning is set while the difference is greater than the threshold, and the reset becomes possible once the difference is less than or equal to the threshold.

• Condenser small temperature difference warning threshold — service programmable setpoint on the maintenance screen.
• Default value: 8.0°F (4.4°C). One manual also prints the default as 6.0°F (3.3°C) before it was changed to 8.0°F (4.4°C).

This warning is reset manually. The manual states: reset when the condenser small temperature difference is less than or equal to the condenser small temperature difference warning threshold, the Maintenance Acknowledge key is pressed, Cond High Small Temp Diff is selected, and the code 0726 entered. The reset therefore requires Cond High Small Temp Diff to be selected, the Maintenance Acknowledge key to be pressed and the code 0726 to be entered, and it is only possible while the condenser small temperature difference is at or below the threshold.