Bryant 558D installation instructions Ð Cooling Troubleshooting, Ð32Ð

TROUBLESHOOTING

Refer to Tables 19-21 and Fig. 44 for Troubleshooting information.

Table 19 Ð Cooling Troubleshooting

PROBLEM	CAUSE	REMEDY
	Power failure.	Call power company.
	Fuse blown or circuit breaker tripped.	Replace fuse or reset circuit breaker.
Compressor and	Defective thermostat, contactor, transformer, or	Replace component.
	control relay.
condenser fan
	Insufficient line voltage.	Determine cause and correct.
will not start.
	Incorrect or faulty wiring.	Check wiring diagram and rewire correctly.
	Thermostat setting too high.	Lower thermostat setting below room
		temperature.
	Faulty wiring or loose connections in compressor	Check wiring and repair or replace.
	circuit.
Compressor will not start	Compressor motor burned out, seized, or internal	Determine cause. Replace compressor.
	overload open.
but condenser fan runs.
	Defective run/start capacitor, overload, start relay.	Determine cause and replace.
	One leg of of 3-phase power dead.	Replace fuse or reset circuit breaker.
		Determine cause.
	Refrigerant overcharge or undercharge.	Recover refrigerant, evacuate system, and
		recharge to nameplate.
	Defective compressor.	Replace and determine cause.
Compressor cycles	Insufficient line voltage.	Determine cause and correct.
	Blocked condenser.	Determine cause and correct.
(other than normally
satisfying thermostat).	Defective run/start capacitor, overload, or start relay.	Determine cause and replace.
	Defective thermostat.	Replace thermostat.
	Faulty condenser-fan motor or capacitor.	Replace.
	Restriction in refrigerant system.	Locate restriction and remove.
	Dirty air ®lter.	Replace ®lter.
	Unit undersized for load.	Decrease load or increase unit size.
	Thermostat set too low.	Reset thermostat.
Compressor operates	Low refrigerant charge.	Locate leak; repair and recharge.
continuously.
	Leaking valves in compressor.	Replace compressor.
	Air in system.	Recover refrigerant, evacuate system, and
		recharge.
	Condenser coil dirty or restricted.	Clean coil or remove restriction.
	Dirty air ®lter.	Replace ®lter.
	Dirty condenser coil.	Clean coil.
Excessive head pressure.	Refrigerant overcharged.	Recover excess refrigerant.
	Air in system.	Recover refrigerant, evacuate system, and
		recharge.
	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.
Excessive suction	High heat load.	Check for source and eliminate.
	Compressor valves leaking.	Replace compressor.
pressure.
	Refrigerant overcharged.	Recover excess refrigerant.
	Dirty air ®lter.	Replace ®lter.
	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 air¯ow.	Increase air quantity. Check ®lter and replace
		if necessary.
	Temperature too low in conditioned area.	Reset thermostat.
	Outdoor ambient below 25 F.	Install low-ambient kit.
Evaporator fan
will not shut off.	Time off delay not ®nished.	Wait for 30-second off delay.
(Sizes 036-060 only.)
Compressor makes excessive	Compressor rotating in wring direction.	Reverse the 3-phase power leads as
noise (558D072 scroll only).		described in Start-Up section, page 17.

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