Heatcraft Refrigeration Products H-IM-79E manual Expansion Valve Capacity, Diagnostics

Expansion Valve Capacity

				R-22			R-404A / R-507
			Evaporator Temperature (°F.)			Evaporator Temperature (°F.)
			+20		-20	+20			-20
Part Number	Valve	Pressure Drop Across Valve (psi)				Pressure Drop Across Valve (psi)
		100	BTUH	100	BTUH	100	BTUH	100	BTUH
29320003	ESVB-1	0.68	8160	0.64	7680	0.48	5760	0.42	5040
29320004	ESVB-4	3.27	39240	3.07	36840	2.31	27720	2.05	24600
29320007 - 08	ESVB-10	8.02	96240	7.54	90480	5.65	67800	5.01	60120
29320013	ESVB-15	15.14	181680	14.25	171000	10.69	128280	9.47	113640
29320014	ESVB-20	22.18	266160	20.87	250440	15.65	187800	13.86	166320

Diagnostics

Beacon II Troubleshooting Guide

PROBLEM	Step		ACTION ITEM	IF OK	IF NOT OK
	1.		Check Primary Power Supply Disconnect		1.	Check fuses and circuit breakers
	2.		Check Voltage to Evaporator Transformer	Go to	2.	Check field wiring for breaks
LED is not lit.	3.		Check Transformer Secondary Output Volts	next step	3.	Replace if necessary
	4.		Check Voltage at Control Board (24V and C)		4.	Check factory wiring and connections
	5.		Replace Control Board
	1.		Check Compressor internal overloads		1.	Wait for reset
LED shows Coo, but	2.		Check Control Power to Condensing Unit		2.	Check transformer voltage (secondary and
			(24 Volts across “COMP” and “C” at board)	Go to		primary) and wiring of 208V power taps.
compressor will not run.	3.		Check Compressor Contactor Coil Voltage	next step	3.	Check internal condensing unit wiring
	4.		Check Compressor Contactor “pulled in”		4.	Replace as needed
ERROR CODES:
E1 Room Sensor			Check Sensor and Board Connection		Replace as needed
E2 Defrost Sensor			Check Sensor and Board Connection		Replace as needed
E3 Suction Sensor			Check Sensor and Board Connection		Replace as needed
E4 Suction Transducer			Check Transducer and Board Connection		Replace as needed
E5 Outdoor Sensor			Check Sensor, wiring and Board Connection		Replace or remove
		1.	Check Refrigerant Type		1.	Compare board setpoint and refrigerant
		2.	Check coil for ice		2.	Defrost coil and check defrost cycle
						settings/setpoints, defrost sensor and
E6 Low Superheat						heater amps.
		3.	Check Control Board step position from board LED			3. Replace board if EEV steps not at 2.
During Cooling		4.	Check Electric Expansion Valve Closure	Go to	4.	Pumpdown system see if LPS opens or if it
(0°F for 2 minutes)				next step		times out (EEV is bad or LPS is set
						incorrectly, if times out) – See Pumpdown.
		5.	Compressor Not Operating		5.	Check overloads and contactor.
		6.	Check Suction Temperature Sensor		6.	Compare board sensor reading against
						actual suction line temperature.
		7.	Check Suction Pressure Transducer		7.	Compare pressure reading against gauges.

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