HOKKIM HAMF-4, Руководство пользователя, Страница: 12 / 15

TESTING
After completing the wiring, use a continuity tester to check that the wiring are properly done and the unit
is ready for testing. It should be noted that the HAMF-8 / 4 is only designed for 12VDC or 24VDC. Do
Not feed 240VAC mains supply into any part of the unit as it will definitely be damaged. Make sure the
+ve output to relays, push buttons, selector switch, bell or lamps is not shorted to ground or the 10A fuse
will blow. As the testing process is long, it is broken into steps, at any time feel free to repeat the steps, as
follows:
1)
Check Voltage
Check the charger and battery voltage. It should be around 27VDC or 13.5VDC depending on the
battery type used.
2) Switch On
Switch On the circuit breaker. Notice that the ESR Run, FMR Run and EST On LED are lighted. At
the same time the Energize Stop Relay should be engaged. After the set delay, the EST Up LED is
lighted and the Energize Stop Relay is released. Check the voltage across terminal T01 & T17 it
should be same as the battery. Then check the voltage across terminal T17 & S1 - S8 it should be
one half (1/2) the battery voltage.
3) Fault Stimulation
Using a short wire with both ends strip of insulation, short the fault signal input to ve or -ve
as desired starting from No. 1 to 8. It should be
noted that fault signal which is loop through the
OPR contacts cannot be triggered externally. When
one or more fault is triggered, the following should
happen: The FMR will trip (this is only true if the
fault Loop/Out has not been disabled). The Bell LED will light and external bell ring. The
corresponding Lamp LED will flash together with the external lamp. The corresponding Alarm LED
will light.
Note: It has come to our attention that certain Caterpillar or Cummins engines which give a +ve
fault signal are sensitive to the one half (1/2) supply voltage at the fault input S1 - S8. A reverse
blocking diode (1N5408) is required to prevent false triggering. See diagram for connection
4) Flashing Rate
The rate of lamp flashing can be adjusted. Turn the Preset on the LFR
card clockwise and the rate is
slower. Anti-clockwise and the rate is faster. Fully anti-clockwise and the lamp is steady On. Use a
slim and long insulated screw driver.
5) Bell Cancel
Press the Alarm Cancel button and notice that the Cancel LED will light. At the same time the
external bell is silenced and the Bell LED no longer lighted. All corresponding Lamp LEDs and
external lamps remained steady On.
6) Alarm Reset
Press the Reset button and notice the Lamp and Alarm LED goes off. In case the external fault is
still present the fault alarm is re-triggered as in step 3.
Page 12
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