15
Service Facts
X343070P08
Trouble Shooting Kit
Dip Switch Operation
10. In order, turn on dip-switches 1 through 8, one at a
time.
11. Verify that the corresponding L.E.D. on the trouble
shooter is being turned on: Dip switch 1 on, L.E.D. DS-
1 is on.
12. Turn off dip switches 1 through 8 and verify each L.E.D.
goes off.
13. If the correct L.E.D.s do not turn on and off in the
proper sequence, check continuity of the 16 wire
harness with ohmmeter: pin 1 goes to pin 1, pin 2 to
pin 2, etc. through pin 16. If harness is good, replace
motor control board. If harness is bad, repair or re-
place.
Low Voltage Comfort Control Operation
14. Verify thermostat signals by jumping "R" to each of the
low voltage terminal connections as follows: BK, O,
YLO, G, W1, W2, W3. See exceptions below for
furnaces and retro fit motor control boards. The corre-
sponding L.E.D. on the troubleshooter should light
when "R" is applied. Verify L.E.D.s on the motor control
board light according to the applied signal: BK, YYLO,
fan. If L.E.D. on motor control board does not light and
16 wire harness is good, replace board.
Furnace
W2 will not light W2 L.E.D. on the troubleshooter due to
White-Rodgers ignition control's normally open switch.
Retro Fit Motor Control Board
Retro fit motor control board W2 is not connected and will
not light W2 on troubleshooter.
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