5800 Refrigerated Sampler Service Guide - Isco
5800 Refrigerated Sampler Service Guide - Isco
5800 Refrigerated Sampler Service Guide - Isco
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<strong>5800</strong> <strong>Refrigerated</strong> <strong>Sampler</strong> <strong>Service</strong> <strong>Guide</strong><br />
Section 3 Refrigeration System<br />
All refrigeration module inspection and servicing procedures<br />
require opening the rear of the refrigerator. Refer to Section 1.7<br />
for removal of the refrigeration module from the cabinet, and to<br />
Section 1.8 for closing the rear compartment.<br />
3.4.1 Inspection,<br />
Troubleshooting, and<br />
Servicing<br />
Tools and supplies<br />
Table 3-2 lists problems that can occur with the refrigeration<br />
system, and their possible causes.<br />
Refrigeration repairs are not performed by the factory, and<br />
on-site repairs are not recommended. Teledyne <strong>Isco</strong> recommends<br />
replacement of the refrigeration module in the event of component<br />
failure.<br />
If it is still deemed more practical to repair the system, on-site<br />
repairs must be performed by licensed service personnel only.<br />
Consult your local laws regarding refrigeration repair.<br />
Copper Tubing<br />
Saddle Tap Tool<br />
Silver Solder<br />
Lacquer Paint<br />
Heat-Shrink<br />
Tubing<br />
Tubing must be cleaned and capped copper,<br />
refrigeration-grade. DO NOT use general purpose<br />
tubing.<br />
Tubing sizes:.250 O.D. x .190 I.D.<br />
.312 O.D. x .280 I.D.<br />
For .312 O.D. service ports.<br />
Solder must be refrigeration-grade silver. DO<br />
NOT use general purpose solder.<br />
Brazing and all exposed metal must be coated<br />
with lacquer paint to prevent corrosion.<br />
Table 3-2 Refrigeration System Troubleshooting<br />
Symptom Cause Action<br />
Compressor tries to start, then<br />
stops, has excessive current draw<br />
Compressor runs hot,<br />
trips thermal breaker<br />
Outer coil does not heat up while<br />
unit is running<br />
Plugged orifice<br />
Compressor failure<br />
Refrigerant leak<br />
Replace refrigeration module<br />
(recommended)<br />
Compressor does not start at all Relay or capacitor failure Replace component (see Table 3-1)<br />
Higher than normal pressure on<br />
one or both service ports<br />
Poor performance, compressor<br />
running constantly<br />
Refrigerant overfill<br />
Water inside the tubing, forming ice<br />
Dented, pinched, or bent tubing<br />
Air leak<br />
Drain and recharge the system<br />
(see Section 3.4.3).<br />
Repair or replace damaged tubing.<br />
Ensure that all adhesive and Permagum<br />
sealants are properly placed on and<br />
behind refrigeration module. See<br />
Figures .1-10 and 1-11.<br />
3-10
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