TM 9-4120-395-14&P
Section VII. MAINTENANCE PROCEDURES
Para.
Para
Fan Delay Relay ...................................................... 4-34
General ................................................................ 4-16
Reversing Valve Solenoid ....................................... 4-35
Front Door Assemblies ......................................... 4-17
Defrost Control ....................................................... 4-36
Information Decals ............................................... 4-18
Indoor Fan ............................................................... 4-37
Side Door Assemblies .......................................... 4-19
Indoor Fan Motor ..................................................... 4-38
Air Filter ............................................................... 4-20
Indoor Fan Motor Bracket ....................................... 4-39
Fresh Air Damper ................................................ 4-21
Heater Thermostat................................................... 4-40
Condensate Drain ................................................ 4-22
Heater Element ....................................................... 4-41
Control Box Wiring ............................................... 4-23
Fuse Links ............................................................... 4-42
Low Voltage Terminal Block ................................. 4-24
Venturi Panel ........................................................... 4-43
Fan Capacitors..................................................... 4-25
Outdoor Fan ............................................................ 4-44
Compressor Capacitor.......................................... 4-26
Outdoor Fan Motor .................................................. 4-45
Terminal .............................................................. 4-27
Outdoor Fan Motor Bracket .................................... 4-46
Lockout Relay ...................................................... 4-28
Accumulator ............................................................ 4-47
Heat Relay ........................................................... 4-29
Indoor Coil ............................................................... 4-48
Heat/Cool Relay ................................................... 4-30
Outdoor Coil ............................................................ 4-49
Low Voltage Transformer ..................................... 4-31
Thermostat .............................................................. 4-50
Compressor Contactor ......................................... 4-32
Fan Relay ............................................................ 4-33
4-16. GENERAL. The procedures in this section have been arranged in the order in which the Items appear in the unit
(O) Maintenance level column on the Maintenance Allocation Chart (MAC) which is provided in Appendix B Step by step
procedures have been provided for all actions authorized to be performed by Unit Maintenance In the order in which they
appear on the MAC.
High voltage is used in the operation of this equipment. Death on contact or severe injury may
result if personnel fail to observe safety precautions.
Front and side door assemblies on the unit are there for a purpose. Do not operate unit with
them off or open unless instructions tell you to. When necessary, do so with care.
4-17. FRONT DOOR ASSEMBLIES.
This task covers:
a. Removal
b. Installation
INITIAL SETUP:
Tools:
Tool Kit, service, refrigeration unit
Equipment Conditions:
Power off at power source.
General Safety Instructions:
Disconnect input power to the unit before performing any internal maintenance.
Voltages used can kill. Shutting the unit off at the thermostat does not disconnect
unit power .
4-23