ATS CyberChiller Series too Low, too High, Noisy Compressor, Condenser Pressure, Condenser Pressure, Head Pressure Too High, DO NOT REWIRE COMPRESSOR

CyberChiller Series Installation, Operation & Maintenance Manual

	SYMPTOM	PROBABLE CAUSE		RECOMMENDATION
	Condenser Pressure	a. Non-condensable gas or air in the	Recover system and recharge. Install
	too High	system.	new drier/strainer.
		b. Condenser air intake is blocked.	Remove debris and clean condenser.
		c. Overcharge of refrigerant.	Reclaim excess refrigerant from system.
		d. Condenser fan not operating.	Check pressure/temperature operating
			switches and motor. Replace as needed.
		e. Condenser pressure regulating	Adjust to obtain correct pressure.
		valve setting too high.
			3. Air in system - bleed system.
			4. Check all strainers and clean if
			needed.
	Condenser Pressure	a. Loss of refrigerant (indicated by	Locate and repair leak. Recharge
	too Low	bubbles in sight glass).	system.
		b. Condenser fan controls not set	Adjust or repair controls.
		properly.
	Noisy Compressor	a. Expansion valve stuck in open	Ensure feeder bulb is tight on suction
		position (abnormally cold suction line).	line. Check operation and superheat.
		b. Broken compressor valve	Replace compressor.
		(compressor knocking, suction
		pressure rises faster than 2lbs/min
		after shutdown).
		c. Worn or scarred compressor	Replace compressor.
		bearings.
		d. Liquid slugging.	System overcharged. Reclaim excess
			refrigerant.
		e. Scroll compressor not properly	Phase correctly at main power source.
		phased.	DO NOT REWIRE COMPRESSOR.
	Head Pressure Too High	a. Low condenser airflow. (Indicated by	Open air passages. Clean coil. Check
		excessive warm air leaving the	condenser fan(s).
		condenser fan).
		b. Air or other non-condensible gas	Reclaim system and recharge. Install a
		in system	new drier strainer.
		c. Overcharge of refrigerant.	Reclaim excess refrigerant from system.
		d. Condenser/drycooler fans not on.	Check main voltage power source to unit.
4-3				(©October, 2006)