TM9-4120-400-14
EVAPORATOR FAN, MOTOR, AND HOUSING.
e. Disassembly
c. Testing
d. Removal
b. Inspection
This task covers:
a. Cleaning
h. Installation
f. Replacement
g. Assembly
INITIAL SETUP
Equipment Condition
Tools
Refrigeration Unit Service Tool Kit
General Safety Instructions
Materials/Parts
Evaporator Fan Motor
Adhesive remover is flammable and the vapors can be
explosive. Repeated or prolonged skin contact or
Self-locking Nuts (20)
inhalation of vapors can be toxic. Use in a well ventilated
Lock Washers (18)
area, wear gloves, and keep away from sparks or flame.
Resilient Mounts (2)
Resilient Mounts (2)
Insulation
Rags
Adhesive Remover
Adhesive
CLEANING
Wipe all dust or dirt from fan, motor, and housing.
INSPECTION
1. Check that all parts are in place and in good condition.
2. Inspect fan for damaged or bent blades and the motor for signs of overheating. Check all mounting hardware
for tightness.
3. Disconnect P3 motor connector plug and check for loose, damaged, or missing pins.
4. Inspect fan housing for damage and missing or defective hardware.
TESTING
1. The motor is capable of operating at two speeds. Therefore there are two sets of field coils.
2. Use an ohmmeter or continuity tester, check continuity at P3 between pins A and B, A and C, D and E, and E
and F. Continuity should exist. If continuity does not exist allow motor to cool and retest. If continuity still
does not exist replace motor.
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