PROBLEM
PROBABLE CAUSE
CORRECTION
Condensing unit will | 1.LINE DISCONNECTED, SWITCH OPEN. | 1.CLOSE START OR DISCONNECT | |
not start - no hum. |
| SWITCH. | |
| 2.FUSE REMOVED OR BLOWN. | 2.REPLACE FUSE. | |
| 3.DETERMINE REASON AND | ||
| 3.OVERLOAD PROTECTOR BLOWN. | ||
| CORRECT/REPLACE | ||
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| 4.CONTROL "OFF" DUE TO COLD LOCATION. | 4.RELOCATE CONTROL. | |
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| 5.CONTROL STUCK IN OPEN POSITION. | 5.REPAIR OR REPLACE CONTROL. | |
| 6.WIRING IMPROPER OR LOOSE. | ||
| 6.CHECK WIRING AGAINST DIAGRAM. | ||
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Condensing unit will | 1.IMPROPERLY WIRED. | 1.CHECK WIRING AGAINST DIAGRAM. | |
not start - hums but | 2.LOW VOLTAGE TO UNIT. | 2.DETERMINE REASON AND CORRECT. | |
trips on overload | 3.STARTING CAPACITOR DEFECTIVE. | 3.DETERMINE REASON AND REPLACE. | |
4.RELAY FAILING TO CLOSE. | 4.DETERMINE REASON AND REPLACE. | ||
protector. | |||
5.COMPRESSOR MOTOR HAS A SHORTED OR | 5.REPLACE COMPRESSOR. | ||
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| . |
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| OPEN WINDING | 6.REPLACE COMPRESSOR | |
| 6.INTERNAL MECHANICAL TROUBLE IN | ||
| . | ||
| COMPRESSOR. | 7. CLEAR CONDENSER & ALLOW | |
| 7. INSUFFICIENT AIR SUPPLY | ||
|
| COMPRESSOR TO COOL DOWN | |
Condensing unit starts | 1.ADDITIONAL CURRENT PASSING THROUGH | 1.CHECK WIRE DIAGRAM.CHECK FOR | |
and runs, but short | OVERLOAD PROTECTOR. | ADDED COMPONENTS CONNECTED TO | |
cycles on |
| WRONG SIDE OF OVERLOAD | |
| PROTECTOR. | ||
protector. |
| ||
2.LOW VOLTAGE TO UNIT. | 2.DETERMINE REASON AND CORRECT. | ||
| |||
| 3.OVERLOAD PROTECTOR DEFECTIVE. | 3.CHECK CURRENT,REPLACE | |
|
| PROTECTOR. | |
| 4.RUN CAPACITOR DEFECTIVE. | 4.DETERMINE REASON AND REPLACE. | |
| 5.EXCESSIVE DISCHARGE PRESSURE. | 5.CHECK VENTILATION,RESTRICTIONS IN | |
|
| COOLING MEDIUM OR REFRIG. SYSTEM. | |
| 6.EXCESSIVE SUCTION PRESSURE. | 6.CHECK FOR MISAPPLICATION. | |
| 7.INSUFFICIENT AIR SUPPLY | 7.CLEAR CONDENSER & ALLOW | |
|
| COMPRESSOR TO COOL DOWN | |
Condensing unit | 1.IMPROPERLY WIRED. | 1.CHECK WIRING AGAINST DIAGRAM. | |
starts, but fails to | 2.LOW VOLTAGE TO UNIT. | 2.DETERMINE REASON AND CORRECT. | |
switch off of "start" | 3.RELAY FAILING TO OPEN. | 3.DETERMINE REASON AND REPLACE. | |
4.RUN CAPACITOR DEFECTIVE. | 4.DETERMINE REASON AND REPLACE. | ||
winding. | |||
5.EXCESSIVELY HIGH DISCHARGE PRESSURE. | 5.CHECK DISCHARGE | ||
| |||
| 6.COMPRESSOR MOTOR HAS A SHORTED OR | POSSIBLE OVERCHARGE. | |
| OPEN WINDING. | 6.REPLACE COMPRESSOR. | |
| 7.INTERNAL MECHANICAL TROUBLE IN | 7.REPLACE COMPRESSOR. | |
| COMPRESSOR. |
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