Emerson AE8-1385 Application Engineering, B U L L E, Continued, Compressor Moderate Run, Trip

Application Engineering
B U L L E	T	I	N	AE8-1385

Table 2 Continued

		1.	Evaporator blower is not running
			•	Check blower relay coil and contacts
			•	Check blower motor capacitor
	Compressor (Moderate Run)		•	Check blower motor for failure or blockage
Red “LOCKOUT”	Trip		•	Check evaporator blower wiring and connectors
	Compressor is locked out		•	Check indoor blower control board
Flash Code 5
	after 4 consecutive or 10 total		•	Check thermostat wiring for open circuit
Yellow Off
	compressor (moderate run) trip	2.	Faulty metering device
	events		•	Check TXV bulb installation (size, location and contact)
			• Check if TXV/fixed orifice is stuck closed or defective
		3.	Condenser coil poor air circulation (dirty, blocked, damaged)
		4.	Low refrigerant charge
		1.	Run capacitor has failed
Red “LOCKOUT”		2.	Open circuit in compressor start wiring or connections
	Open Start Circuit		•	Check wiring and connectors between supply and the
Flash Code 6
	Current only in run circuit			compressor “S” terminal
Yellow Off
		3.	Compressor start winding is damaged
			•	Check compressor motor winding resistance
		1.	Open circuit in compressor run wiring or connections
Red “LOCKOUT”			•	Check wiring and connectors between supply and the
	Open Run Circuit			compressor “R” terminal. Confirm proper wire routing per
Flash Code 7
	Current only in start circuit			Figure 1.
Yellow Off
		2.	Compressor run winding is damaged
			•	Check compressor motor winding resistance
Red “LOCKOUT”	Over Current Protection	1.	Check for contactor shorted to ground
	Current to PROT is greater than
Flash Code 10		2.	Check for mis-wiring to the PROT terminal
	2A mps

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© 2011 Emerson Climate Technologies	12
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