147
2. To verify the PWM measured in step 1 c (above) is correct, access the
Tools
submenu from the display. Follow the steps in Figure 13-8 to identify the PWM
signal the microprocessor is sending to the blower motor.
3. Divide the PWM voltage measured in step 1 c (above) by the DC voltage
measured in step 1 b (above). For example, 13.7 volts measured across pins 1
& 10 (PWM line), and 23.7 volts measured across pins 1 & 15. [13.7] / [23.7] =
0.58. This means the PWM signal is 0.58 = 58%. The
Blower PWM
value
displayed under the
Info
screen (above) should match this calculated value.
Info
AFS
UV LIGHT
CANOPY
C1 - A MODE
REV. D
10 INCH
[OK/MUTE]
58
CURRENT / AVG = 1217 / 1219
NEW FILTER / MAX = 1074 / 1450
REV. D
SUPPLY
[UP] [DOWN]
Blower
PWM
Figure 13-8
Summary of Contents for Logic+ A2
Page 149: ...149 208 240V...
Page 151: ...151 Blower only will not start...
Page 152: ...152 Lights only will not illuminate...
Page 153: ...153 UV Light will not illuminate...
Page 154: ...154 Airflow Alert activating...
Page 155: ...155 Filter Life Gauge not at 100 when new...
Page 156: ...156 Contamination in the work area...
Page 200: ...200 Figure 23 4 1 2 4 3 5 7 6 8 8...
Page 201: ...201 END OF 3849920 Figure 23 5 9 10 11 12 13...