Sterling Plumbing 225, 90, 150, 100 installation manual Problem, Possible cause, Corrective action

Problem	Possible cause	Corrective action
	Airflow valve sticking or	Check for proper operation of
		valve actuators. Repair or
Loss or reduction in drying	failing to shift.
		replace if necessary.
capacity. (Cont’d.)	Blower fins filled with dust or	Remove blower side plate,
		clean baffles, replace.
	contaminants.
		Replace filter elements.
	Insufficient power to PLC	Check power supply and
PLC Regeneration Bed LED	(Power LED is off).	power wiring to PLC.
	Faulty PLC (PLC Power light
indicators both off.		Replace PLC.
	is on, Run light is off, and/or
	Error light is on).
	Regenerating bed cool down.	None.
		Verify that blower contactor is
	Blower Input indicator is off.	on. Check input wiring to
PLC Regeneration Heater		PLC.
	Process air in high-	None.
Left/Right output indicators	temperature condition.
both off.
	Insufficient power to PLC	Check power supply and
	(Power light is off).	power wiring to PLC.
	Faulty PLC (PLC Power light	Replace PLC.
	is on, Run light is off, and/or
	Error light is on).
		Check resin manufacturer’s
		data sheet for proper drying
	Process temperature set too	temperature. Make sure plant
	high due to operator error.	personnel are aware of the
		correct process temperature
Material in drying hopper		set point.
cakes, or meltdown occurs.	High temperature alarm not	Reset high temperature
	set properly.	alarm.
	Process set point is out of	Restore temperature
	acceptable range.	controller to factory pre-sets.
	Function set for degrees	Verify correct Celsius or
	Celsius (ºC), set point at
		Fahrenheit settings.
	degrees Fahrenheit (ºF).
	Burned out regeneration	Repair or replace.
	heater.
	Contaminated or worn out	Replace.
	desiccant.
Poor dew point performance.	Leaking process air hoses.	Repair or replace.
	Dryer operates beyond its	Check dryer and drying
	capacity.	hopper sizing.
	Bad dew point sensor.	Replace.
	Fouled dew point sensor	Clear obstruction. Air should
	manifold.	flow freely through sensor.

Cabinet Series Dehumidifying Dryer 50