Van Air Systems FP-3 Kit - Manual (Page 6)

PAGE 6
SECTION 2 INSTALLATION
SECTION 3 OPERATION
Once the kit is installed and set properly, just energize the
controller and it will operate automatically.
The controller will turn off the aftercooler fan(s) when the
temperature of the system air at the outlet of the aftercooler
falls to 35°F. The fan will turn on when the system
tempterature rises above 40°F.
PROBLEM
1. Aftercooler fan
motor(s) not operating,
system temperature
above 40
O F.
No power to the controller
Controller not set properly.
Controller failure.
Sensor failure
POSSIBLE CAUSES
Check electrical power source. If power supply is okay,
check the controller and sensor. Replace if necessary.
Check the controller settings as shown in SECTION 2.7.
Check the controller settings. If the controller is properly set,
check the main power source.
Check electrical power source and controller. If the controller
and power source are ok, the sensor may be faulty.
To check the sensor, remove it from the thermowell. Adjust the
setpoint on the controller to 50
o F and place the sensor in a
container of ice water. The controller should turn off the power
to fans in several minutes.
Replace the sensor if faulty.
SOLUTIONS
4.1 TROUBLESHOOTING
2.7 SETTING THE CONTROLLER
The factory settings for the controller are as follows:
RELAY 1 RELAY 2
SET POINT 35°F 35°F
DIFFERENTIAL 5°F 5°F
MODE COOLING COOLING
Turn on the main power to the FP-3 control.
If the settings have been changed, set them to the factory settings
following the procedures below . The controller will retain the setting if
the power is disconnected.
PROGRAMMING PROCEDURES
1. Press MENU key, then press RIGHT arrow key three times to set up
relay #1.
2. Use the UP and DOWN arrow to select the SETPOINT. Press the
RIGHT arrow to store the setpoint in memory.
3. Press the RIGHT arrow to set the DIFFERENTIAL. Use the UP and
DOWN arrow to set the differential. Press the RIGHT arrow to store the
differential in memory.
4. Press the RIGHT arrow key to set the HEATING / COOLING mode.
Use the UP or DOWN arrow to select the desired mode. Press the
RIGHT arrow to store the mode in memory.
5. Press the right arrow three times and repeat steps 2 through 4 to set
up relay #2.
6. Press RIGHT arrow three times to exit the program mode.
FIGURE 2-J CONTROLLER FRONT COVER
The heat tape is controlled by its own internal thermostat.
Power is supplied to the heat tape as long as the control box
is energized.
The temperature controller is equipped with an LCD display.
During normal operation when the fan is operating, (tem-
perature above set points) the sensor temperature and
RELAYS 12 ON will be displayed on the controller.
SECTION 4 TROUBLESHOOTING