Hermetic Compressor - Tecumseh
Hermetic Compressor - Tecumseh
Hermetic Compressor - Tecumseh
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45<br />
Step 1: Before Continuing with Troubleshooting…<br />
WARNING! All electric power should be disconnected and you should have already made<br />
sure that the compressor does not have a ground fault (see “Checking for a Ground Fault”<br />
on pages 40-41). You should have also checked with windings for continuity and proper<br />
resistance (see “Checking for Continuity and Proper Resistance” on page 42), made sure<br />
the system is getting proper voltage, and that the control, thermostat, and contactor are<br />
working properly.<br />
Step 2: Disconnect Fan Motor or Any Other Devices<br />
If there is a fan motor or any other auxiliary device, open the circuit for the fan motor or any<br />
other device.<br />
Step 3: Check External Thermal Protector<br />
Check for continuity across the thermal protector (line 1 and compressor terminal connection).<br />
If there is no continuity then the thermal protector may be tripped. Wait for the<br />
protector to cool off and close. This may take more than an hour. Check continuity gain.<br />
If there is no continuity, replace the protector.<br />
Step 4: Check Current Relay<br />
Keep the relay upright. Check the relay by measuring continuity between:<br />
Relay terminals 1 (or L) and S. If there is continuity, then the contacts are closed when they<br />
should be open. Replace the current relay.<br />
Relay terminals 1 (or L) and M. If there is no continuity, replace the current relay.<br />
Step 5: Replace Current Relay<br />
If all above tests prove satisfactory, there is no capillary restriction, and the unit still fails to<br />
operate properly, replace the relay. The new relay will eliminate any electrical problems<br />
which cannot be determine with the above tests.<br />
Step 6: Continue Troubleshooting<br />
If the new relay does not correct the problem, check for adequate compressor pumping as<br />
outlined in the procedure on page 70.