Heatcraft Refrigeration Products H-IM-79E Diagnostics, Beacon II Troubleshooting Guide continued

Diagnostics

Beacon II Troubleshooting Guide (continued)

PROBLEM	Step	ACTION ITEM	IF OK		IF NOT OK
	1.	Check system operation: Is it running?		1.	Check power to condensing unit
					Check position of Service Mode switches
					Check compressor overloads and contactor
	2.	Check system charge		2.	Add or remove refrigerant to proper charge
	3.	Check for proper operating superheat		3.	Check EEV operation
					Check control board EEV signal
					Check suction sensor and transducer
	4.	Check for high superheat and EEV wide open		4.	Check EEV inlet screen and restrictions
					Check liquid line sizing
					Check head pressure controls
	5.	Check Low Pressure Safety Switch		5.	Check everything for E7 LPS above
Cannot get to box
	6.	Compare equipment capacity with requirements	Go to	6. Add or replace with more/larger equipment
temperature
	7.	Check box temperature setpoint	next step	7. Correct setpoint to proper value
	8.	Check compressor performance		8.	Check compressor application limitations
					Check integrity of compressor operation
					(impaired, worn or damaged components)
	9.	Check condenser coil for dirt/debris		9.	Clean condenser coil
	10.	Check condenser for non-condensables		10. Remove all non-condensables
	11.	Check condenser fan operation		11. Replace/repair fan blade, motor, cycling
					switch or make corrective adjustments.
	12.	Check for correct refrigerant type		12. Compare board setpoint and refrigerant
	13.	Check for iced evaporator coil		13. Defrost coil and check defrost cycle (see E2)
					settings/setpoints and defrost sensor
	14.	Check defrost parameters		14. Correct defrost setpoints in program
					(frequency and termination of defrosts)
	15.	Check superheat setpoint (too high?)		15. Correct setpoint for more cooling surface
	16.	Check display values (°F or °C)		16. Correct setpoint for proper display values
		Placing system into SERVICE MODE			Terminating SERVICE MODE
		(BOARDS ONLY)			(BOARDS ONLY)
	1.	Use Remote Service Switch in condensing unit		1.	Must terminate using same switch
	2.	Pressing “Force Service” button board* twice		2.	Press “Clear” button on board
	3.	Connection between “Ser” and “C” on board*		3.	Open connection between “Ser” and “C”
		(all are wired in parallel; all will activate mode)			(Note: If multiple switches were placed in Service
Service Mode		*ONLY Master board on multiple evaporator systems		Mode, all must be “open” to terminate the mode.)
(SEr is displayed)
		(with Beacon II Smart Controller)			(with Beacon II Smart Controller)
	1.	Use Remote Service Switch in condensing unit		1.	Must terminate using same switch
	2.	Connection between “Ser” and “C” on board*		2.	Open connection between “Ser” and “C”
	3.	From program menu of Beacon II Smart Controller,		3. From program menu of Beacon II Smart Controller,
		Change SERVICE setpoint to “On”.		Change SERVICE setpoint to “Off”
		[all are wired in parallel; any/all will activate mode.]			[Note: If multiple switches were placed in Service
		*ONLY Master board on multiple evaporator systems			Mode, all must be “open” to terminate the mode.)

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