Table 39 — Cooling Service Troubleshooting

PROBLEM

CAUSE

REMEDY

Compressor and

Power failure.

Call power company.

Condenser Fan

 

 

Fuse blown or circuit breaker tripped.

Replace fuse or reset circuit breaker.

Will Not Start.

Defective thermostat, contactor, transformer,

Replace component.

 

 

or control relay.

 

 

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 temperature.

Compressor Will Not Start

Faulty wiring or loose connections in com-

Check wiring and repair or replace.

But Condenser Fan Runs.

pressor circuit.

 

 

Compressor motor burned out, seized, or

Determine cause. Replace compressor.

 

internal overload open.

 

 

Defective run/start capacitor, overload, or

Determine cause and replace.

 

start relay.

 

 

One leg of 3-phase power dead.

Replace fuse or reset circuit breaker. Determine

 

 

cause.

Compressor cCycles (Other than

Refrigerant overcharge or undercharge.

Recover refrigerant, evacuate system, and recharge

Normally Satisfying Thermostat).

 

to nameplate.

 

Defective compressor.

Replace and determine cause.

 

Insufficient line voltage.

Determine cause and correct.

 

Blocked condenser.

Determine cause and correct.

 

Defective run/start capacitor, overload, or

Determine cause and replace.

 

start relay.

 

 

Defective thermostat.

Replace thermostat.

 

Faulty condenser-fan motor or capacitor.

Replace.

 

Restriction in refrigerant system.

Locate restriction and remove.

Compressor Makes Excessive Noise

Compressor rotating in wrong direction.

Reverse the 3-phase power leads as described on

(580F103,121,150, and 151 Scroll

 

page 50.

Only).

 

 

Compressor Operates Continuously.

Dirty air filter.

Replace filter.

 

Unit undersized for load.

Decrease load or increase unit size.

 

Thermostat set too low.

Reset thermostat.

 

Low refrigerant charge.

Locate leak, repair, and recharge.

 

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.

Excessive Head Pressure.

Dirty air filter.

Replace filter.

 

Dirty condenser coil.

Clean coil.

 

Refrigerant overcharged.

Remove excess refrigerant.

 

Air in system.

Recover refrigerant, evacuate system, and

 

 

recharge.

 

Condenser air restricted or air short-cycling.

Determine cause and correct.

Head Pressure Too Low.

Low refrigerant charge.

Check for leaks, repair, and recharge.

 

Compressor valves leaking.

Replace compressor.

 

Restriction in liquid tube.

Remove restriction.

Excessive Suction Pressure.

High heat load.

Check for source and eliminate.

 

Compressor valves leaking.

Replace compressor.

 

Refrigerant overcharged.

Recover excess refrigerant.

Suction Pressure Too Low.

Dirty air filter.

Replace filter.

 

Low refrigerant charge.

Check for leaks, repair, and recharge.

 

Metering device or low side restricted.

Remove source of restriction.

 

Insufficient evaporator airflow.

Increase air quantity. Check filter and replace if nec-

 

 

essary.

 

Temperature too low in conditioned area.

Reset thermostat.

 

Field-installed filter drier restricted.

Replace.

Compressor No. 2 Will Not Run.

Unit in economizer mode.

Proper operation; no remedy necessary.

—71—

Page 70 Page 72
Page 71
Image 71
Bryant 580F installation instructions Cooling Service Troubleshooting, Problem Cause Remedy
Page 70 Page 72

580F specifications

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