Fan control
AssigneeADC DSL Systems, Inc.
InventorsDennis Patrick Miller, Douglas G. Gilliland
Life of this patent
Estimating the term…
Abstract
A method for controlling fan operation that includes detecting a stopped fan and attempting to start the stopped fan. The method includes attempting to start the stopped fan again after at least one first time interval when the fan does not start. The method includes attempting to start the stopped fan again after at least one second time interval when the fan does not start after a predetermined number of first time intervals, where the at least one second time interval is longer than the first time interval.
Claims35
A method for restarting a stopped fan, the method comprising:
- attempting to start the stopped fan;
- attempting to start the stopped fan again after at least one first time interval when the fan does not start;
- and
- attempting to start the stopped fan again after at least one second time interval when the fan does not start after a predetermined number of first time intervals, wherein the at least one second time interval is longer than the first time interval.
A method for restarting a stopped fan, the method comprising:
- attempting to start the stopped fan and setting at least one other fan at full speed;
- setting the at least one other fan at a percentage of full speed;
- attempting to start the stopped fan again and setting the at least one other fan at full speed again after at least one first time interval when the stopped fan does not start;
- and
- attempting to start the stopped fan again and setting the at least one other fan at full speed again after at least one second time interval when the stopped fan does not start after a predetermined number of first time intervals, wherein the at least one second time interval is longer than the first time interval.
A method for controlling fan operation, the method comprising:
- detecting a stopped fan;
- attempting to start the stopped fan;
- attempting to start the stopped fan again after at least one first time interval when the fan does not start;
- and
- attempting to start the stopped fan again after at least one second time interval when the fan does not start after a predetermined number of first time intervals, wherein the at least one second time interval is longer than the first time interval.
A method for controlling fan operation, the method comprising:
- detecting a stopped fan;
- attempting to start the stopped fan and setting at least one other fan at full speed;
- setting the at least one other fan at a percentage of full speed;
- attempting to start the stopped fan again and setting the at least one other fan at full speed again after at least one first time interval when the stopped fan does not start;
- and
- attempting to start the stopped fan again and setting the at least one other fan at full speed again after at least one second time interval when the stopped fan does not start after a predetermined number of first time intervals, wherein the at least one second time interval is longer than the first time interval.
A method for controlling fan operation, the method comprising:
- detecting a stopped fan;
- executing a restart method for starting the stopped fan;
- terminating the restart method when a shutdown condition occurs;
- retaining a stopped-fan fault indicative of the stopped fan when the shutdown condition occurs;
- and
- executing the restart method for starting the stopped fan when the shutdown condition no longer exists.
A method for controlling fan operation, the method comprising:
- detecting a stopped fan;
- shutting off power to the stopped fan at a temperature corresponding to a freezing temperature of a lubricant of the stopped fan;
- retaining a stopped-fan fault indicative of the stopped fan when the power is shut off;
- restoring power to the stopped fan at a temperature greater than the freezing temperature of the lubricant;
- and
- executing a restart method for starting the stopped fan.
A machine-readable medium comprising machine-usable instructions for causing a circuit card to perform a method of controlling fan operation, the method comprising:
- detecting a stopped fan;
- attempting to start the stopped fan;
- attempting to start the stopped fan again after at least one first time interval when the fan does not start;
- and
- attempting to start the stopped fan again after at least one second time interval when the fan does not start after a predetermined number of first time intervals, wherein the at least one second time interval is longer than the first time interval.
A machine-readable medium comprising machine-usable instructions for causing a circuit card to perform a method of restarting a stopped fan, the method comprising:
- attempting to start the stopped fan;
- attempting to start the stopped fan again after at least one first time interval when the fan does not start;
- and
- attempting to start the stopped fan again after at least one second time interval when the fan does not start after a predetermined number of first time intervals, wherein the at least one second time interval is longer than the first time interval.
A machine-readable medium comprising machine-usable instructions for causing a circuit card to perform a method of controlling fan operation, the method comprising:
- detecting a stopped fan;
- executing a restart method for starting the stopped fan;
- terminating the restart method when a shutdown condition occurs;
- retaining a stopped-fan fault indicative of the stopped fan when the shutdown condition occurs;
- and
- executing the restart method for starting the stopped fan when the shutdown condition no longer exists.
Dependencies are inferred from the claim text.