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TEMPERATURE SENSING PROBE (A1-RT) - 506780130
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TM-5-4120-359-14 Air Conditioner Split Package 18 000 BTU/HR Cooling 30 000 BTU/HR Heating 208 Volt 3 Phase 400 Hertz Manual
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EVAPORATOR FAN (IMPELLER) AND MOTOR ASSEMBLY REMOVAL AND INSTALLATION
TM 5-4120-359-14
a. Inspection/Test Installed
(1) Disconnect the two quick-disconnect terminals from the P4 to J4 harness.
(2) Check resistance between probe leads. Resistance should be zero. If it is not, replace the temperature
sensing probe.
(3) Check that probe leads are securely attached to probe and that probe is in good condition. If it is bent,
dented or otherwise damaged, replace it.
(4) Check that sensor bracket is securely attached and in good condition. If it is loose, tighten hardware. If it is
damaged, replace it.
b. Removal
(1) Disconnect the two quick-disconnect terminals from the P4 to J4 harness.
(2) Carefully pull the leads through the side panel.
(3) Using screwdriver and wrench, remove the three screws and lock nuts.
(4) Remove the temperature sensing probe.
(5) If the sensor bracket is to be replaced, use a screwdriver and wrench and remove the two screws and lock
nuts. Remove the bracket.
c.
Installation. If the old probe is to be reinstalled, skip to step (4).
(1) The sensing probe will be supplied with leads. Slip insulation sleeving over each lead for the entire length,
approximately 20 inches (50.8 cm).
(2) Install a quick-disconnect terminal on each of the two probe lead ends.
(3) Slip a short length, approximately 3 inches (7.6 cm), of insulation sleeving over the quick-disconnect
terminals.
(4) If the sensor bracket was removed, use a screwdriver and wrench, and install the bracket with the two screws
and lock nuts.
(5) Use a screwdriver and wrench and install the probe to the bracket with three screws and lock nuts.
(6) Work the leads through the side panel and connect the two quick-disconnect terminals to the terminals on the
P4 to J7 harness.
(7) Slip the insulation sleeving over the quick-disconnect terminals.
Follow-on Procedure:
1. Install the front evaporator cover. (See paragraph 3-17.)
2. Install the return air screen and frame. (See paragraph 3-18.)
3. Install the air conditioner on the shelter. (See paragraph 3-6.)
4-49

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