Carrier Compressors Service Guide

MOTOR BURNOUT CLEAN-UP PROCEDUREWhen a hermetic motor burns out, the stator winding decomposes andforms carbon, water, and acid, which contaminate refrigerant systems.These contaminants must be removed from the system to prevent repeatmotor failures. See Carlyle/Carrier recommendation procedures for cleanupafter burnout in semi-hermetic compressors - form #06DA604782.! WARNINGBefore attempting service work on the compressor, see safetyprecautions listed in Section 2.3, pages 20 to 31, and on compressorterminal box cover. Also follow any installation instructionsprovided with the replacement compressor. Failure to follow theseinstructions could result in equipment damage or seriouspersonal injury.1. Determine cause of burnout and make necessary corrections.a. Inspect control box for blown fuses, welded starter contacts,welded overload contacts or burned out heater elements.b. Inspect compressor terminal plate for burned or damagedterminals and insulation, and shorted or grounded terminals.c. Inspect unit wiring for loose power connections.d. Check for power supply fluctuation beyond design limits(voltage too high or too low). If power supply is a problem,provide the appropriate system protector.2. Close compressor suction and discharge service valves and removethe refrigerant from the compressor using environmentallyapproved methods. Leave remaining refrigerant in system.3. Remove damaged compressor and replace.a. Remove suction and discharge shut-off valve bolts and allother connections to damaged compressor.b. Remove damaged compressor and replace with a newcompressor.c. On severe motor burnouts, be sure shut-off valves and suctionor discharge lines are not contaminated. If contaminated, they42