Carrier 50JC04-06, Инструкции по обслуживанию и техническому обслуживанию

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Fig. 26 — Condenser-Fan Assembly — Screw Pattern Sequence
Troubleshooting Cooling System
Refer to Table 2 for additional troubleshooting topics.
1
2
3
4
5
NO SCREW
(Blank Tab)
Table 2 — Troubleshooting
SYMPTOM CAUSE SOLUTION
Compressor and Outdoor
Fan Will Not Start
Power failure. Call power company.
Fuse blown or circuit breaker tripped. Replace fuse or reset circuit breaker. Determine root cause.
Defective thermostat, contactor, transformer.
control relay, or capacitor.
Replacement component.
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.
High pressure switch tripped. See problem “Excessive head pressure.”
Low pressure switch tripped. Check system for leaks. Repair as necessary.
Freeze-up protection thermostat tripped. See problem “Suction pressure too low.”
Compressor Will Not Start
but Outdoor Fan Runs
Faulty wiring or loose connections in compressor
circuit.
Check wiring and repair or replace.
Compressor motor burned out, seized, or internal
overload open.
Determine cause. Replace compressor or allow enough time for
internal overload to cool and reset.
Defective run/start capacitor, overload, start
relay.
Determine cause. Replace compressor or allow enough time for
internal overload to cool and reset.
One leg of 3-phase power dead. Replace fuse or reset circuit breaker. Determine cause.
Compressor Cycles (Other
Than Normally Satisfying
Thermostat)
Refrigerant overcharge or undercharge. Recover refrigerant, evacuate system, and recharge to nameplate.
Defective compressor. Replace and determine cause.
Insufficient line voltage. Determine cause and correct.
Blocked outdoor coil or dirty air filter. Determine cause and correct.
Defective Run/Start capacitor, overload, start
relay.
Determine cause and correct.
Defective thermostat. Replace thermostat.
Faulty outdoor-fan (cooling) or indoor-fan
(heating) motor or capacitor.
Replace faulty part.
Restriction in refrigerant system. Locate restriction and remove.
Defective loader plug. Determine cause and replace.
Compressor Operates
Continuously
Dirty air filter. Replaced filter.
Unit undersized for load. Decrease load or increase unit size.
Thermostat set too low (cooling). Reset thermostat.
Low refrigerant charge. Locate leak; repair and recharge.
Air in system. Recover refrigerant, evacuate system, and recharge.
Outdoor coil dirty or restricted. Clean coil or remove restriction.
Compressor Makes
Excessive Noise
Compressor rotating in the wrong direction. Reverse the 3-phase power leads as described in Start-Up.