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TEMPERATURE CONTROL COMPONENT BOARD (A1) TEST
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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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Figure 4-47. Temperature Control Component Board (A1)
TM 5-4120-359-14
WARNING
The following test must be conducted with the power on.
Exercise extreme
caution.
a. Connect power to air conditioner.
b. Turn selector switch to COOL.
c.
Turn temperature control to maximum COOLER.
d. Using multimeter, check temperature control output voltage between terminals CR1-4 neg (-) and A1K1-2.
Voltage should be 25 to 31 Vdc.
e. Turn selector switch to LOW HEAT.
f.
Turn temperature control to maximum WARMER.
g. Using multimeter, check temperature control output voltage between terminals CR1-4 neg (-) and A1K1-5.
Voltage should be 25 to 31 Vdc.
h. Turn selector switch to OFF.
i.
Remove power to air conditioner.
4-48. TEMPERATURE CONTROL COMPONENT BOARD (A1)
For test, see paragraph 4-47.
Preliminary Procedures: Remove evaporator section electrical module assembly. (See paragraph 4-41.)
a. Access
(1) Using screwdriver, remove six screws and lock washers.
(2) Lift top cover off.
4-104

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