Quantcast RELAYS (K3, K4, AND K5) TEST (continued) 4120-01-069-1321)">

 

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RELAYS (K3, K4, AND K5) 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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RELAYS (K3, K4, AND K5) - 506780201
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. To test relay K3:
(1) Turn mode selector switch to LOW HEAT and temperature control switch to maximum COOLER.
(2) Using multimeter, check voltage (power out) between K3 terminal:
A2 and B2
B2 and C2
A2 and C2
Voltage should be 197 to 229 Vac.
(3) Using multimeter, check voltage (power in) between K3 terminals:
A1 and B1
B1 and C1
A1 and C1
Voltage should be 197 to 229 Vac.
(4) Using multimeter, check control voltage between K3 terminals X1 and X2. Voltage should be 25 to 31 Vdc.
(5) Turn selector switch to OFF.
c.
To test relay K4:
(1) Turn mode selector switch to LOW HEAT and temperature control switch to maximum WARMER.
(2) Using multimeter, check voltage (power out between K4 terminals:
A2 and B2
B2 and C2
A2 and C2
Voltage should be 197 to 229 Vac.
(3) Using multimeter, check voltage (power in) between K4 terminals
A1 and B1
B1 and C1
A1 and C1
Voltage should be 197 and 229 Vac.
4-112

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