Viking VUIM150, Сервисный журнал

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3.3 Compressor
The compressor is the heart of the refrigeration system. It also, however, relies on other
parts of the system to function. Make certain that the other parts of the system are
correctly functioning before determining that the compressor is faulty.
The compressor is protected from power interruptions with a start delay built into
the control to prevent high pressure startup (see 1.11
Operation ). DO NOT mistake
this for a faulty compressor.
The following must also be observed before concluding the compressor is faulty:
1. Low high side pressures, warm evaporator plate, cool condenser coil, or little or
very low current draw from the unit will indicate a faulty compressor.
2. Check for continuity between the compressor terminals and the shell of the
compressor. If continuity is found, the compressor is faulty and will need replaced.
3. Check for resistance between all three compressor terminals. The resistance will
vary from terminal to terminal and from compressor to compressor due to age and
use. If no resistance is found, the compressor is faulty and will need replaced.
Removal
1.
Disconnect power, waterline, and drain line. If a drain pump is used, it will need to
be disconnected and removed.
2. Remove the access panel and rear panel at the rear of the unit (see figure 3.3).
3. Remove the grille by removing the two screws and disconnecting the three wires to
the rocker switch. Be sure to mark where these wires go for re-assembly.
4. Remove the drain valve.
5. Remove the water valve.
6. Take out the two screws that secure the top of the electrical bracket located in the
front of the mechanical area (see figure 3.4).
7. Remove the six screws that secure the base plate to the cabinet on the bottom of the
unit (see figure 3.5).
8. Gently slide the mechanical out the rear of the unit just enough to gain access to the
drier assembly (see figure 3.6).
9. Install sealed system access valve(s) and recover refrigerant. After recovering, be
sure to cap off the access valve to prevent contamination of the system.
10. Remove the cap from the rear of the compressor.
11. Disconnect the PTC starter relay at the compressor by pulling off. You will need to
disconnect the three wires from the old PTC starter and then connect the new one.
12. Un-braze and remove the capillary tube from the drier assembly.
13. Un-braze the tube from the hot gas valve at the tee fitting on the drier assembly
(see figure 3.1)
14. Un-braze and remove the drier assembly.
15. Un-braze and remove the suction line at the compressor (see figure 3.8).
16. Un-braze the hot gas discharge line at the compressor (see figure 3.8).
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