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

3) Do not over tighten the terminal screw even though there is a shield to protect the wires from the
screw. Test your connection by slightly tugging the wire.
4) Use a screw driver of correct size. Over size drivers will damage the terminals.
5) Double check your wiring with a meter to ensure that +ve outputs are not shorted to ground.
6) When removing or replacing the relay cards, do not over stress the plug-in connectors, by bending
excessively.
7) After replacing a relay card, check that it is done properly. There are no guides on both ends of the
connectors, it is easy to miss one or two connections to the left or right. See that the relay card is in line
with the legend on the base PCB.
8) The MFT-V has to be replaced after it absorbs any voltage surge. Its rating is 56VDC. Any voltage
higher then that across terminals T11 & T12 will cause the metal oxide varistors to activate. Usually this
happens when lightning strike the Under Voltage Relay and cause a flash over to its relay contacts.
After taking care that the base PCB is not damaged, trouble shooting the HAMF-8 / 4 is easy, in the worse
scenario, all you have to do is to replace all the 21 / 16 relay cards, which takes less then 10 minutes. To
replace any relay card, you have to remove the six knobs and six mounting screws of the top face label
plate. After replacing the suspected faulty relay card; test that the unit is working before replacing the top
face label plate. You have to align all the LEDs to their appropriate holes before fixing the mounting
screws and knobs.
You should use logic to deduce which relay card is faulty by looking at the LED and testing the outputs
with external wires removed if necessary. This is to eliminate faults caused by external sources. It is
impossible to list all possibilities of fault symptoms and their causes but you can contact us for assistance
or demonstration of our demo. unit at these numbers:
Tel: 03-90805498 , 03-90805630 , 90805992 , 90801192 and Fax: 03-90851191 .
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HOKKIM
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Control & Protection Relays