Cooling Service Troubleshooting - Bryant DuraPac 580F Series Installation, Start-Up And Service Instructions Manual

PROBLEM
Compressor and
Condenser Fan
Will Not Start.
Compressor Will Not Start
But Condenser Fan Runs.
Compressor cCycles (Other than
Normally Satisfying Thermostat).
Compressor Makes Excessive Noise
(580F103,121,150, and 151 Scroll
Only).
Compressor Operates Continuously.
Excessive Head Pressure.
Head Pressure Too Low.
Excessive Suction Pressure.
Suction Pressure Too Low.
Compressor No. 2 Will Not Run.
Table 39 — Cooling Service Troubleshooting
CAUSE
Power failure.
Fuse blown or circuit breaker tripped.
Defective thermostat, contactor, transformer,
or control relay.
Insufficient line voltage.
Incorrect or faulty wiring.
Thermostat setting too high.
Faulty wiring or loose connections in com-
pressor circuit.
Compressor motor burned out, seized, or
internal overload open.
Defective run/start capacitor, overload, or
start relay.
One leg of 3-phase power dead.
Refrigerant overcharge or undercharge.
Defective compressor.
Insufficient line voltage.
Blocked condenser.
Defective run/start capacitor, overload, or
start relay.
Defective thermostat.
Faulty condenser-fan motor or capacitor.
Restriction in refrigerant system.
Compressor rotating in wrong direction.
Dirty air filter.
Unit undersized for load.
Thermostat set too low.
Low refrigerant charge.
Leaking valves in compressor.
Air in system.
Condenser coil dirty or restricted.
Dirty air filter.
Dirty condenser coil.
Refrigerant overcharged.
Air in system.
Condenser air restricted or air short-cycling.
Low refrigerant charge.
Compressor valves leaking.
Restriction in liquid tube.
High heat load.
Compressor valves leaking.
Refrigerant overcharged.
Dirty air filter.
Low refrigerant charge.
Metering device or low side restricted.
Insufficient evaporator airflow.
Temperature too low in conditioned area.
Field-installed filter drier restricted.
Unit in economizer mode.
— 71 —
REMEDY
Call power company.
Replace fuse or reset circuit breaker.
Replace component.
Determine cause and correct.
Check wiring diagram and rewire correctly.
Lower thermostat setting below room temperature.
Check wiring and repair or replace.
Determine cause. Replace compressor.
Determine cause and replace.
Replace fuse or reset circuit breaker. Determine
cause.
Recover refrigerant, evacuate system, and recharge
to nameplate.
Replace and determine cause.
Determine cause and correct.
Determine cause and correct.
Determine cause and replace.
Replace thermostat.
Replace.
Locate restriction and remove.
Reverse the 3-phase power leads as described on
page 50.
Replace filter.
Decrease load or increase unit size.
Reset thermostat.
Locate leak, repair, and recharge.
Replace compressor.
Recover refrigerant, evacuate system, and
recharge.
Clean coil or remove restriction.
Replace filter.
Clean coil.
Remove excess refrigerant.
Recover refrigerant, evacuate system, and
recharge.
Determine cause and correct.
Check for leaks, repair, and recharge.
Replace compressor.
Remove restriction.
Check for source and eliminate.
Replace compressor.
Recover excess refrigerant.
Replace filter.
Check for leaks, repair, and recharge.
Remove source of restriction.
Increase air quantity. Check filter and replace if nec-
essary.
Reset thermostat.
Replace.
Proper operation; no remedy necessary.