Troubleshooting - Bryant R-410A 583B Installation And Operating Instructions Manual

SYMPTOM
Compressor and condenser fan will not start.
Compressor will not start but condenser fan
runs.
Three-phase scroll compressor makes ex-
cessive noise, and there may be a low pres-
sure differential.
Compressor cycles (other than normally sat-
isfying thermostat).
Compressor operates continuously.
Excessive head pressure.
Head pressure too low.
Excessive suction pressure.
Suction pressure too low.
TABLE 10—TROUBLESHOOTING — COOLING
CAUSE
Power failure
Fuse blown or circuit breaker tripped
Defective thermostat, contactor, transformer,
control relay, high pressure, or loss of charge
switch
Insufficient line voltage
Incorrect or faulty wiring
Thermostat setting too high
Faulty wiring or loose connections in compres-
sor circuit
Compressor motor burned out, seized, or inter-
nal overload open
Defective run/start capacitor, overload, start re-
lay
One leg of 3-phase power dead
Scroll compressor is rotating in the wrong direc-
tion
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
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
Outdoor ambient below 40 F
Field-installed filter-drier restricted
—26—
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 tempera-
ture.
Check wiring and repair or replace.
Determine cause. Replace compressor.
Determine cause and replace.
Replace fuse or reset circuit breaker. Determine
cause.
Correct the direction of rotation by reversing the
3-phase power leads to the unit. Shut down unit
to allow pressures to equalize.
Recover refrigerant, evacuate system, and re-
charge to capacities shown on nameplate.
Replace and determine cause.
Determine cause and correct.
Determine cause and correct.
Determine cause and replace.
Replace thermostat.
Replace.
Locate restriction and remove.
Replace filter.
Decrease load or increase unit size.
Reset thermostat.
Locate leak, repair, and recharge.
Replace compressor.
Recover refrigerant, evacuate system, and re-
charge.
Clean coil or remove restriction.
Replace filter.
Clean coil.
Recover excess refrigerant.
Recover refrigerant, evacuate system, and re-
charge.
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 — replace if
necessary.
Reset thermostat.
Install low-ambient kit.
Replace.