Manual 2100-694B
Page
17 of 62
provided on the tool). Opening the valve to the full
open position will aid in the refrigerant reclamation and
evacuation processes.
With the stator removed, the resistance should be 40
ohms +/- 10%. There are two sets of three wires that
will have this resistance.
Reapply the EEV stator coil and retaining nut. Upon
powering the unit back up, the control board will
automatically drive the EEV back to the fully shut
position, and then back to the 40% open position
prior to starting the compressor back up. Once
the compressor starts, the control board will again
modulate the EEV position to control the system
superheat.
System Pressures
To view system pressure and temperatures during this
process:
1. From the Status screen, press UP or DOWN key
until Quick Menu displays Information icon
( ). Press ENTER key.
2. Press UP or DOWN keys to scroll to
EEV 1 Circuit
and
EVD 1 Compressor
screens.
3. Reference the
Pressures
and
Temperatures
on
EVD
1 Compressor
and the
Superheat
and
Subcooling
on
EEV 1 Circuit
.
Suction Pressure Transducer
The unit has a pressure transducer installed on
the suction line between the evaporator coil and
compressor. The transducer is used for system
monitoring of suction system pressures. The sensor is
used with the suction temperature sensor to provide
a real time superheat calculation that determines the
EEV position.
FIGURE 25
Adjusting Suction Sensor/Transducer
Pressure Values
This sensor can be verified and adjusted by:
1. Press MENU key to go to the Main Menu screen.
2. Press UP or DOWN keys and ENTER key to enter
TECHNICIAN password 1313.
3. Press UP or DOWN keys to scroll to
I/O Config
;
press ENTER key.
4. Press UP or DOWN keys to scroll to
Suction Pr
Sensor C10
; press ENTER key.
5. Verify the measurement displayed on screen is
accurate (see Figure 25).
6. If the measurement needs to be adjusted, apply an
offset value by pressing ENTER to scroll to
Offset
.
7. Press UP or DOWN keys to adjust the offset.
8. The update will not take effect until the cursor is
moved out of the
Offset
parameter.
9. Once adjusted, press the ESCAPE key several
times to return to Main Menu screen.
FIGURE 24
Electronic Expansion Valve (EEV) and Service Tool
