Carrier 06E - Manual (Page 15)

MOTOR BURNOUT
(Clean-Up Procedure)
When a hermetic motor bums out, the stator
winding decomposes forming carbon, water and
acid which contaminate refrigerant systems. Re­
move these contaminates from system to prevent
repeat motor failures.
1. Close compressor suction and discharge service
valves, and bleed refrigerant from compressor.
Save remaining refrigerant in system.
2. Remove burned motor from compressor, and
drain compressor oil. Clean crankcase and
motor housing with solvent. Ensure that all
metal particles are wire-brushed free and
removed.
On severe burnouts, disassemble compressor
heads and valve plate assemblies. Clean them in
same manner as crankcase and motor housing.
3. Ascertain cause of burnout and remedy. Check
control box for welded starter contacts, welded
overload contacts or burned out heater ele­
ments. Check terminal plate for burned or
damaged terminals, insulation, and shorted or
grounded terminals.
4. Reassemble compressor with new stator and
rotor. Install new liquid line filter-drier, and
place new oil charge in crankcase.
5. Evacuate and dehydrate compressor.
6. Place compressor in operation. After 2—4 hours
of operation, check compressor oil for discolor­
ation and/or acidity. If oil shows signs of
contamination, replace oil charge, filter-driers,
and clean suction strainer with solvent.
7. Check oil daily for discoloration and acidity. If
oil stays clean and acid-free, the system is clean.
If oil shows signs of contamination, change oil,
filter-drier, and clean suction strainer. If filter-
drier or suction strainer is dirty or discolored,
repeat this step until system is clean.
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