TROUBLESHOOTING (Continued)
PROBLEM | POSSIBLE CAUSE | TO CORRECT | |
| Compressor attempts to start | Allow a minimum of two (2) minutes to allow pressures to | |
| before system pressures are | ||
| equalize before attempting to start. | ||
| equalized. | ||
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| ||
|
| Check voltage with unit operating. Check for other | |
COMPRESSOR | Low or fluctuating voltage. | appliances on the circuit. Unit should be on separate | |
| circuit for proper voltage, and be fused separately. | ||
ATTEMPTS TO |
| ||
START, OR RUNS | Incorrect wiring. | Connect per wiring diagram. | |
FOR SHORT | Shorted or incorrect capacitor. | Check by substituting a known good capacitor of correct | |
PERIODS ONLY. | rating. | ||
| |||
CYCLES ON | Restricted or low air flow through | Check for proper fan speed or blocked condenser. | |
OVERLOAD. | condenser coil. |
| |
| Compressor running abnormally | Check for kinked discharge line or restricted condenser. | |
| hot. | Check amperage. | |
| Overload opens too soon. | Change compressor if all other corrections above are | |
| normal. | ||
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| |
| Thermostat contacts not closing. | Check continuity of thermostat at coldest setting. Jump | |
| contacts, if compressor runs, replace thermostat. | ||
| Low voltage supply. | Check for nameplate voltage. | |
| Switch | Test for continuity. | |
COMPRESSOR | Open capacitor. | Check by substituting a known good capacitor of correct | |
DOES NOT START - | rating. | ||
| |||
FAN MOTOR RUNS. | Internal overload open. | Check voltage at compressor terminals. If voltage is | |
| satisfactory, replace compressor. | ||
|
| ||
| Relay open | Replace relay | |
| Open or shorted compressor | Check windings for continuity and resistance. Direct test | |
| windings | compressor. If direct test fails, replace compressor. | |
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| |
| Thermostat open or inoperative. | Set to coldest position. Test thermostat and replace if | |
| necessary. | ||
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| Dirty air filter. | Clean as recommended in Owner’s Manual. | |
DOES NOT COOL, | Dirty or plugged condenser or | Use steam or detergents to clean. | |
evaporator coil. | |||
OR COOLS ONLY |
| ||
Poor air circulation in area being |
| ||
SLIGHTLY. | Adjust air louvers. | ||
cooled. | |||
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| ||
| Low capacity - undercharge. | Clean, check for leak and make repair. | |
| Compressor not pumping | Check amperage draw against nameplate. If not | |
| properly. | conclusive, make pressure test. |
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