High Country Tek emc-1V - Manual (Page 30)

Part No:- 021-00351 Rev 1.0 emc-1P & emc-1V e-Fan System Controller User Guide Page 30
e-Fan Cooling System Controllers
with J1939 Interface
On Site Testing
If the set up procedure does not achieve the desired results, double check the wiring and perform the
following tests. Record the test results.
Tools Required:
A PC running Windows XP, Vista, or Windows7 and the correct emc-1 software are required for initial set-
up, programming or observation of the controllers operation through the RS232 port (directly or via a USB
to serial converter cable).
The PC can also be used for uploading the configured program to new emc-1 modules for upgrades.
A battery operated multi meter is always a good idea for measuring and confirming analog signals and an
oscilloscope would be useful for looking at fast moving or digital signals on the system.
Check the Power input: (9-32V)
If the supply voltage is below 9VDC, there is a risk of:
a) Module shutting down,
b) Module continuously trying to reset or
c) Low drive current to valves.
If the supply voltage is more than 32 VDC there is a risk of:
a) Blown in-line AGC5 fuse
b) Module shutting down.
c) Fan damage due to excessive drive voltage.
Check the Control Inputs:
Verify that any analog control inputs are the correct polarity and are hooked up correctly and to the
correct module terminals by monitoring their status with the emc-1software or testing with a voltmeter or
oscilloscope.
Ensure the J1939 Bus is terminated correctly (120 ohm resistors) and that the engine is running to ensure
good data.
Ensure that any external control or command inputs have their respective sources 0V or GND connected
to the modules power supply 0V or GND terminal.
Verify That Alarm or Reverse Indicator Loads are Not Shorted:
Disconnect the wires going to the terminals and measure the resistance between the wires. Verify it is in
the expected Ohmic range for the type and voltage of load being driven. Verify that there is no voltage
with respect to ground generated by the load and wiring.