Manual 2100-670B
Page
13 of 33
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
Suct Temp
Sensor (C9)
; press ENTER key.
5. Verify the measurement displayed on screen is
accurate (see Figure 13).
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.
Suction Temperature Alarm
When the suction temperature sensor value is out of
range (-41.0 to 303.0°F), the controller will generate
a sensor failure alarm to indicate the sensor is not
working properly.
This alarm cannot be adjusted.
Alarm index numbers: 137, 138, 139, 140
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.
FIGURE 14
Overriding EEV Output
FIGURE 13
Adjusting Suction Temperature Sensor Values
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
14)
.
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.
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 15 on page 14) is
used to manually open the EEV. To do this, remove the
EEV stator coil (red color with retaining nut on top),
slide the magnetic tool over the shaft where the stator
was removed and turn in a clockwise direction to open
the valve to the full open position (directional arrows
are 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 20% open position
