Manual 2100-670I
Page
22 of 47
Additional Indoor Airflow Alarms
Supply Air Temperature Alarm
When the supply air 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 is fixed and cannot be adjusted.
Condenser Fan
Condenser Fan Components
Condenser Fan
The unit is equipped with a condenser fan that is driven
by an electronically commutated motor (ECM). This
fan is controlled by a 0-10vdc signal provided from the
controller. The fan operates between 100-1200 rpm.
To view the output of the condenser fan:
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
Condenser Fan
(C15)
; press ENTER key.
5. Reference
Fan Speed
parameter for the current
output to the condenser fan
(see Figure 34).
If required, the condenser fan output can be manually
set for 5 minutes for troubleshooting purposes.
While looking at
Condenser Fan (C15)
screen:
1. Press ENTER key to scroll to
Fan OV Speed
(see
Figure 36).
2. Press UP or DOWN keys to change the value to the
desired override speed.
3. Press ENTER key to save the value and move
cursor to the
Override
parameter.
4. Press UP or DOWN keys to change the value from
Disabled
to
Enabled
.
Liquid Line Pressure Transducer
The unit has a pressure transducer installed on the
liquid line between the condenser and electronic
expansion valve (EEV). The transducer is used for
system monitoring of the liquid side system pressures.
This information is used to indicate when outdoor coil
cleaning is necessary based on outdoor conditions and
system pressures. The sensor is also used to adapt
the condenser fan speed for high and low ambient
conditions.
The liquid pressure sensor input 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
Liquid Pr
Sensor (C10)
; press ENTER key.
5. Verify the measurement displayed on screen is
accurate (see Figure 36).
6. If the measurement needs to be adjusted, apply an
offset value by pressing the ENTER key to scroll to
Offset
.
7. Press UP or DOWN keys to adjust the offset. The
update will not take effect until the cursor is
moved out of the offset parameter.
5. The fan should now run at the selected speed. The
output can be verified by again referencing the
Fan
Speed
parameter.
The override will last for 5 minutes or until the
Override
parameter is set to
Disabled
again.
Due to design considerations of the condenser section
of the wall-mount unit, placement/clearance of the
motor/fan blade is critical to heat dispersal. Should a
change of motor or fan blade be necessary, see Figure
35 for proper clearance adjustment.
FIGURE 34
Verifying Condenser Fan Output
FIGURE 35
Fan Blade Setting
.75"
(from the closest point on the fan blade)
