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 TM9 4120-423-14&P
3
Top evaporator cover must be removed. (See WP0026.)
4
Top module cover must be removed. (See WP0041.)
WARNING
AC power tests must be conducted with the power on. Exercise extreme caution.
5
Connect power to air conditioner.
6
To test relay K3, turn mode selector switch to LOW HEAT and temperature control switch to
maximum COOLER.
7
Using multimeter, check voltage (power out) between K3 terminals 3 and 5, 5 and 9, and 3 and
9. Voltage should be 197 to 229 Vac.
8
Using multimeter, check voltage (power in) between K3 terminals 1 and 7, 7 and 11, and 1 and
11. Voltage should be 197 to 229 Vac.
9
Using multimeter, check control voltage between K3 terminals 2 and 10. Voltage should be 25
to 31 Vdc.
10
Turn selector switch to OFF.
11
To test relay K4, turn mode selector switch to LOW HEAT and temperature control switch to
maximum WARMER.
12
Using multimeter, check voltage (power out) between K4 terminals 3 and 5, 5 and 9, and 3 and
9. Voltage should be 197 to 229 Vac.
13
Using multimeter, check voltage (power in) between K4 terminals 1 and 7, 7 and 11, and 1 and
11. Voltage should be 197 to 229 Vac.
14
Using multimeter, check control voltage between K4 terminals 6 and 10. Voltage should be 25
to 31 Vdc.
15
Turn selector switch to OFF.
16
To test relay K5, turn mode selector switch to HIGH HEAT and temperature control switch to
maximum WARMER.
17
Using multimeter, check voltage (power out) between K5 terminals 3 and 5, 5 and 9, and 3 and
9. Voltage should be 197 to 229 Vac.
0038 00-5
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