Bryant 583B instruction manual Troubleshooting- Cooling

TABLE 10—TROUBLESHOOTING — COOLING

SYMPTOM	CAUSE	REMEDY
	Power failure	Call power company.
	Fuse blown or circuit breaker tripped	Replace fuse or reset circuit breaker.
	Defective thermostat, contactor, transformer,
	control relay, high pressure, or loss of charge	Replace component.
Compressor and condenser fan will not start.	switch
	Insufficient line voltage	Determine cause and correct.
	Incorrect or faulty wiring	Check wiring diagram and rewire correctly.
	Thermostat setting too high	Lower thermostat setting below room tempera-
		ture.
	Faulty wiring or loose connections in compres-	Check wiring and repair or replace.
	sor circuit
	Compressor motor burned out, seized, or inter-	Determine cause. Replace compressor.
Compressor will not start but condenser fan	nal overload open
runs.	Defective run/start capacitor, overload, start re-	Determine cause and replace.
	lay
	One leg of 3-phase power dead	Replace fuse or reset circuit breaker. Determine
		cause.
Three-phase scroll compressor makes ex-	Scroll compressor is rotating in the wrong direc-	Correct the direction of rotation by reversing the
cessive noise, and there may be a low pres-		3-phase power leads to the unit. Shut down unit
sure differential.	tion	to allow pressures to equalize.
	Refrigerant overcharge or undercharge	Recover refrigerant, evacuate system, and re-
		charge to capacities shown on nameplate.
	Defective compressor	Replace and determine cause.
	Insufficient line voltage	Determine cause and correct.
Compressor cycles (other than normally sat-	Blocked condenser	Determine cause and correct.
isfying thermostat).	Defective run/start capacitor, overload or start	Determine cause and replace.
	relay
	Defective thermostat	Replace thermostat.
	Faulty condenser-fan motor or capacitor	Replace.
	Restriction in refrigerant system	Locate restriction and remove.
	Dirty air filter	Replace filter.
	Unit undersized for load	Decrease load or increase unit size.
	Thermostat set too low	Reset thermostat.
Compressor operates continuously.	Low refrigerant charge	Locate leak, repair, and recharge.
	Leaking valves in compressor	Replace compressor.
	Air in system	Recover refrigerant, evacuate system, and re-
		charge.
	Condenser coil dirty or restricted	Clean coil or remove restriction.
	Dirty air filter	Replace filter.
	Dirty condenser coil	Clean coil.
Excessive head pressure.	Refrigerant overcharged	Recover excess refrigerant.
	Air in system	Recover refrigerant, evacuate system, and re-
		charge.
	Condenser air restricted or air short-cycling	Determine cause and correct.
	Low refrigerant charge	Check for leaks, repair and recharge.
Head pressure too low.	Compressor valves leaking	Replace compressor.
	Restriction in liquid tube	Remove restriction.
	High heat load	Check for source and eliminate.
Excessive suction pressure.	Compressor valves leaking	Replace compressor.
	Refrigerant overcharged	Recover excess refrigerant.
	Dirty air filter	Replace filter.
	Low refrigerant charge	Check for leaks, repair and recharge.
	Metering device or low side restricted	Remove source of restriction.
Suction pressure too low.	Insufficient evaporator airflow	Increase air quantity. Check filter — replace if
		necessary.
	Temperature too low in conditioned area	Reset thermostat.
	Outdoor ambient below 40 F	Install low-ambient kit.
	Field-installed filter-drier restricted	Replace.

—26—