604D-- -- A

Table 9 – Troubleshooting Chart

SYMPTOM

CAUSE

REMEDY

 

 

 

 

Power failure

Call power company

 

Fuse blown or circuit breaker tripped

Replace fuse or reset circuit breaker

 

Defective contactor, transformer, or high--pressure,

Replace component

Compressor and condenser fan will not start.

loss--of--charge or low--pressure 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 compressor cir-

Check wiring and repair or replace

 

cuit

 

 

 

 

 

Compressor will not start but condenser fan

Compressor motor burned out, seized, or

Determine cause

internal overload open

Replace compressor

runs

 

 

Defective run/start capacitor, overload, start relay

Determine cause and replace

 

 

One leg of 3--phase power dead

Replace fuse or reset circuit breaker

 

Determine cause

 

 

 

 

 

Three-phase scroll compressor

 

Correct the direction of rotation by reversing the

makes excessive noise, and there may be a

Scroll compressor is rotating in the wrong direction

3--phase power leads to the unit.

low pressure differential.

 

 

 

 

 

 

 

Refrigerant overcharge or undercharge

Recover refrigerant, evacuate system, and re-

 

charge to capacities shown on rating plate

 

 

 

 

 

 

Defective compressor

Replace and determine cause

Compressor cycles (other than normally sat-

Insufficient line voltage

Determine cause and correct

Blocked condenser

Determine cause and correct

isfying 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 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

Mechanical damage 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 IPR leaking

Replace compressor

 

Restriction in liquid tube

Remove restriction

 

High heat load

Check for source and eliminate

Excessive suction pressure

Compressor IPR 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 55°F (12.7°C)

Install low--ambient kit

 

Filter drier restricted

Replace filter

30

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Bryant 604D--A installation instructions Troubleshooting Chart, Symptom Cause Remedy

604D--A specifications

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