Manual 2100-670
Page
13 of 32
EEV Operation
EEV Superheat Control
The electronic expansion valve (EEV) will open or close
to maintain 10° of superheat while the compressor is
running. When the compressor is not running, the valve
will close.
Low superheat protection will be active once the
superheat value is at or below 5°F. At this point,
the control will aggressively close the valve so that
superheat is maintained.
EEV Instructions for Vacuum, Reclaim, Charge Unit
The electronic expansion moves to the 0 position when
the unit is not actively cooling. The valve may need to
be manually positioned for service or troubleshooting.
The valve can be positioned by using a menu override.
To manually override the valve:
NOTE:
The unit must be off to perform this override.
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
TEEV Service
(C16)
; press ENTER key.
5. Press ENTER key to scroll to
Enable
(see Figure
13)
.
6. Press UP or DOWN key to change
Disable
to
Enable
.
7. Press ENTER key to scroll to
Position
.
8. Press UP or DOWN keys to adjust to the desired
value.
9. Press ENTER key to save.
10. Press the ESCAPE key several times to return to
Main Menu screen.
FIGURE 14
Electronic Expansion Valve (EEV) and Service Tool
FIGURE 13
Overriding EEV Output
FIGURE 12
Adjusting Suction Temperature Sensor Values
The valve can also be opened or closed using the EEV
service tool (Bard Part # 2151-021). This magnetic
EEV service tool (shown in Figure 14) is used to
