Watts AERCO Edge [ii] - Air Fuel Valve Stepper Motor; Blower

Edge [ii] Controller Operation Manual
SECTION 4: DIAGNOSTICS
OMM-139_E • 8/25/2020 Technical Support • (800) 526-0288 • Mon-Fri, 8 am - 5 pm EST Page 81 of 196
4.4.1 Air Fuel Valve Stepper Motor
Complete the instructions below to test the Air/Fuel Valve’s stepper motor.
1. Go to: Main Menu → Diagnostics → Subsystems → Air Fuel Valve Stepper Motor.
Figure 4.4.1: Subsystems: Air Fuel Valve Stepper Motor Test Screen
2. Press the Auto-Stroke control to initiate the test. This will start one full cycle of the Air
Fuel Valve, from fully closed to fully open then back to closed. During the test, the valve
position is displayed from 0% to 100%.
3. Alternatively, you can manually increment the Air Fuel Valve position in 1% increments
using the Plus and Minus buttons and compare the stepper motor’s physical position to the
value on the screen.
4.4.2 Blower
Complete the instructions below to test the Blower motor.
1. Go to: Main Menu → Diagnostics → Subsystems → Blower.
Figure 4.4.2: Subsystems: Blower Screen
2. The Blower screen allows you manually drive the blower at a desired output using the Plus
or Minus buttons on the Blower (voltage) control, or to run a pre-defined sequence.
3. To run the blower manually, use the Plus or Minus buttons or press the numeric field and
input a blower voltage, then verify by observing the blower speed.