Freezestat Alarm; Dirty Filter Alarm; Supply Air Temperature Alarm; Condenser Fan - Bard FUSION-TEC HR58APA Installation Support Materials

Freezestat Alarm

When the freezestat digital input indicates a low
temperature event has occurred for longer than 120
seconds, the controller will generate a freezestat alarm.
This will then change the blower to high speed and
turn off the compressor for a minimum of 300 seconds.
The blower speed will return to normal once the alarm
condition has been removed. The compressor will start
again when the freezestat indicates no alarm and 300
seconds has passed. Once the condition is no longer
present, the alarm will automatically clear.
To adjust the freezestat alarm delay:
1. Press MENU key to go to the Main Menu screen.
2. Press UP or DOWN keys and ENTER key to enter
USER password 2000.
3. Press UP or DOWN keys to scroll to System Config;
press ENTER key.
4. Press UP or DOWN keys to scroll to Alarm Setup
(A7); press ENTER key.
5. Press ENTER key to scroll to FreezeStat Alarm
Delay (see Figure 2.20).
6. Press UP or DOWN keys to change to the desired
value.
7. Press ENTER key to save the value.
FIGURE 2.20
Adjusting Freezestat Alarm Delay

Dirty Filter Alarm

The wall unit is equipped with a differential pressure
switch input to the controller. When the switch
indicates a dirty filter alarm, the controller will generate
an alarm. Once the condition is no longer present, the
alarm will automatically clear. Additionally, an indicator
light will be turned on with the alarm and turned off
when the alarm clears.
The threshold of this alarm is adjusted by changing the
settings on the switch (see Table 2.2 on page 35).
Page 36 of 53

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 0-10v signal provided from
the controller. The fan operates between 200-1800
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
USER password 2000.
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 2.21).
FIGURE 2.21
Verifying Condenser Fan Output
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 2.21).
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.