Carrier 38AE Bedienungsanleitung PDF herunterladen (Seite 9)

TROUBLESHOOTING

PROBLEM SOLUTION

COMPRESSOR DOES NOT RUN

Contactor Open

1. Power off

1. Restore power

2. Fuses blown in field power circuit 2 After finding cause and correcting, repiace with correct size

fuse.

3. Transformer dead 3. Replace transformer if primary windings are receiving power.

4. Thermostat circuit open 4. Check thermostat setting.

5. Time Guard® il circuit defective

5. Repiace Time Guard ii circuit.

6. Circuit breaker tripped

6. Check for excessive compressor current draw aiiowabie (140%

FLA maximum).

7. Low-pressure switch open

7. Check for refrigerant undercharge, obstruction of indoor airflow,

or whether compressor suction shutoff valve is fully open Make

sure liquid line solenoid (if used) is open.

8. High-pressure switch open

8. Check for refrigerant overcharge, obstruction of outdoor airflow,

air in system, or whether compressor discharge valve is fully

open. Be sure outdoor fan(s) is operating

9. Loose electrical connections

9. Tighten all connections.

10. Compressor stuck 10. See 06D compressor service literature.

11. Compressor motor thermostat open 11. Check for excessive motor temperature.

Contactor Closed

1. Compressor leads loose

1. Check connections.

2. Motor windings open

2 See 06D compressor service literature.

3. Single phasing

3. Replace blown fuse

COMPRESSOR CYCLES ON HIGH-PRESSURE SWITCH

Outdoor Fan On

1. High-pressure switch faulty

1 Replace switch.

2. Airflow restricted

2 Remove obstruction.

3. Air recirculating

3. Clear airflow area.

4. Noncondensables in system

4 Purge and recharge as required.

5. Refrigerant overcharge 5. Purge as required

6. Line voltage incorrect

6. Consult power company

7. Refrigerant system restrictions

7. Check or replace filter drier, expansion valve, etc.

Outdoor Fan Off

1. Fan slips on shaft

1 Tighten fan hub setscrews.

2. Motor not running

2. Check power and capacitor.

3. Motor bearings stuck

3. Replace bearings

4. Motor overload open

4. Check overload rating. Check for fan blade obstruction

5. Motor burned out

5. Replace motor.

COMPRESSOR CYCLES ON LOW-PRESSURE SWITCH

Indoor-Air Fan Running

1. Filter drier plugged

1. Replace filter drier.

2. Expansion valve power head defective

2. Replace power head.

3. Low refrigerant charge

3 Add charge. Check low-pressure switch setting

Airflow Restricted

1. Coil iced up

1. Check refrigerant charge

2. Coil dirty

2. Clean coil fins.

3. Air filters dirty

3. Clean or replace filters.

4. Dampers closed

4 Check damper operation and position.

Indoor-Air Fan Stopped

1. Electrical connections loose

1 Tighten all connections.

2. Fan relay defective

2. Replace relay.

3. Motor overload open

3. Power supply

4. Motor defective

4. Replace motor.

5. Fan belt broken or slipping

5. Replace or tighten belt

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