|
|
| Installation and Operations Manual | ||
|
|
| |||
SERVICE DIAGNOSIS CHART |
|
| |||
Symptom |
| Cause |
| Remedy | |
|
|
|
|
| |
Compressor | 1. | Motor Line open | 1. | Close starter or disconnect switch | |
Does Not Run | 2. | Fuse blown | 2. | Replace fuse | |
| 3. | Tripped overload | 3. | See electrical section | |
| 4. | Control contacts dirty or jammed in open position | 4. | Repair or replace | |
| 5. | Piston seized | 5. | Remove | |
|
|
|
| and jammed parts | |
| 6. | Frozen compressor or motor bearings | 6. | Repair or replace | |
|
|
|
|
| |
Unit Short | 1. | Control differential set too close | 1. | Widen differential | |
Cycles | 2. | Discharge valve leaking | 2. | Replace valve plate | |
| 3. | Motor compressor | 3. | Check for high head pressure, tight bearings, seized | |
|
|
|
| pistons, clogged | |
| 4. | Refrigerant shortage | 4. | Repair leak and recharge | |
| 5. | Refrigerant over charge | 5. | Remove some refrigerant | |
| 6. | Cycling on high pres. cutout | 6. | Check condenser / or non condensable in system | |
|
|
|
|
| |
Compressor | 1. | Improperly wired | 1. | Check wiring against diagram | |
Will Not Start - | 2. | Low voltage | 2. | ||
Check main line voltage - determine location of voltage | |||||
Hums |
|
|
| ||
|
|
| drop | ||
Intermittently | 3. | Relay contacts not closing | 3. | ||
Check my operating manually. Replace relay if defective | |||||
|
|
|
| ||
| 4. | Open circuit in | 4. | Check stator leads. If leads are all right, replace stator | |
| Check stator. If leads are all right, replace stator | ||||
| 5. | Stator winding grounded | 5. | ||
| Eliminate cause of excessive pressure | ||||
| 6. | High discharge pressure | 6. | ||
| Check oil level. Correct binding | ||||
| 7. | Tight compressor | 7. | ||
|
| ||||
|
|
|
|
| |
Unit Operates | 1. | Control contacts sticking in closed position | 1. | Clean points or replace control | |
Long Or | 2. | Insufficient refrigerant in system | 2. | Check for leaks. Repair and add charge | |
Continuously | 3. | Dirty condenser | 3. | Clean condenser | |
| 4. | Air or | 4. | Purge high point in system | |
| 5. | Compressor inefficient | 5. | Check valves and pistons | |
| 6. | Improper wiring | 6. | Check wiring and correct if necessary | |
|
|
|
|
| |
Fixture | 1. | Insufficient refrigerant in system | 1. | Check for leaks. Repair and add charge | |
Temperature | 2. | Control set too high | 2. | Reset control | |
Too High | 3. | Control wiring loose | 3. | Check wiring to control | |
| 4. | Expansion valve or strainer plugged | 4. | Clean or replace | |
| 5. | Compressor inefficient | 5. | Check valves and pistons | |
| 6. | Expansion valve set too high | 6. | Lower setting | |
| 7. | Iced or dirty coil | 7. | Defrost or clean coil | |
| 8. | Unit too small | 8. | Add unit or replace | |
| 9. | Clogged or small refrigerant lines | 9. | Clear line or increase line size | |
| 10. | Oil logged in system | 10. | Remove excessive oil, check refrigerant charge | |
|
|
|
|
| |
High | 1. | Refrigerant overcharge | 1. | Remove the excess | |
Discharge | 2. | 2. | Remove the | ||
Pressure | 3. | Dirty condenser coil | 3. | Clean | |
| 4. | High side restriction | 4. | Check all valves or remove restriction | |
| 5. | Head pressure control setting | 5. | Adjust controls | |
| 6. | Fan not running | 6. | Check electrical circuit | |
|
|
|
|
|
34 | Part # 25000102 |