Sterling 682.88107.00 specifications Problem Possible cause Corrective action

Problem	Possible cause		Corrective action
	Leaks in connecting lines.		Inspect/replace faulty line or
			connection.
	Air in circulating lines.		Perform venting sequence in
			Chapter 3.
	Low fluid.		Check fluid level in sight glass.
			Add fluid if required.
	Defective Ful-Flo valve.	See Chapter 3.
	Water in fluid.		Drain water from low point in
Rapid drop in pressure/no			piping (see Chapter 3), or boil
			water off.
pressure.
	Vent solenoid open.		Allow vent timer to run out; or,
			check valve operation when unit
			is cold by opening the fill port.
			Check motor; rewire if
	Pump running in reverse.		necessary. See electrical
			diagrams.
	Pump repair/adjustment needed.		Adjust head spacing or replace
			worn pump components.
	V belt broken/worn.	Replace as required.
	Water in fluid.		Drain water from low point in
Noisy pump.			piping (see Chapter 3), or boil
			water off.
	Severely degraded fluid.		Drain and flush system. Replace
			fluid.

Upright Portable Hot Oil TCUs Chapter 6: Troubleshooting 38