Bard MEGA-TEC W090A, Service Instructions Manual

Page: 23 / 159

Manual 2100-671C
Page 21 of 59
3. Press UP or DOWN keys to scroll to Sys Config ;
press ENTER key.
4. Press UP or DOWN keys to scroll to Blower Config
A10 screen.
5. Press ENTER key to scroll to Balanced Climate or
High Sensible parameter (see Figure 27).
6. Press UP or DOWN key to change value from Off to
On or On to Off .
The unit will automatically switch to the required
speed for each mode. For more information on the
high sensible command from LC, please see LC6000
Service Instructions 2100-669.
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 0-100% command using modbus
serial communication. The fan operates between 100-
1200 rpm.
To enable fan 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.
FIGURE 27
Enabling/Disabling High Sensible Operation or
Balanced Climate Operation
TABLE 8
Blower Speed Settings*
Mode
Unit
W090 W120 W150
Free Cooling 45% 57% 65%
Cooling Stage 1
High Sensible 38.5% 48.5% 54%
Nominal 33% 42% 47%
Balanced Climate 27.6% 32.6% 36.4%
Cooling Stage 2
High Sensible 52% 63% 83%
Nominal 45% 57% 65%
Balanced Climate 36.4% 43.8% 50.5%
Cooling Stage 3
High Sensible 52% 63% 83%
Nominal 45% 57% 65%
Balanced Climate 36.4% 43.8% 50.5%
Heating Stage 1 57% 57% 57%
Heating Stage 2 57% 57% 57%
Emergency Ventilation 100% 100% 100%
Freeze Alarm 80% 80% 80%
Dehumidification 57% 57% 57%
* Blower position percentages are communicated through Modbus and cannot be verified with meter.