HOKKIM HAMF-4, Руководство пользователя, Страница: 14 / 15

13) Manual Start
Set the Auto-Manual-Test selector to the Manual position. Nothing will happen until you press the
Manual Start pushbutton. Then, the fuel solenoid will on and EST off. The Start relay will respond
each time you press the button. Bypass on the CCR and GRR relay and the Manual Start pushbutton
is disabled. The OPT will on and up the OPR and the generator is in operation. To stop the
generator you either turn the selector to Auto for automatic shutdown or press the Emergency Stop
pushbutton.
14) Test Start
Set the Auto-Manual-Test selector to the Test position. Immediately the ASR will begin the Crank
and Rest cycle. The fuel solenoid will on and the EST will off. Bypass on the CCR and GRR. The
OPT will on and up the OPR and the generator is in operation. To stop the generator you either turn
the selector to Auto for automatic shutdown or press the Emergency Stop pushbutton.
15) Optional Outputs
There are a few outputs not mentioned in the testing procedure above. They are the FMR output,
Flashing output, Oil Pressure Timer output and Fused +ve out. If you are using any of those optional
outputs, test that they are in working order.
You can add a relay to the FMR output and use the contacts for remote signaling to the BAS
(Building Automation System) or the guard house to warn that the gen-set has failed. Take note that
the FMR does not give an output for FAR cards that is set for no shut down.
By adding a relay to the flashing output, you can series the NO contacts with the bell thus causing it
to ring on and off.
Four nos. OPR contacts are provided, but if they are insufficient, you can add a relay to the Oil
Pressure Timer output for additional contacts.
You can use the Fused +ve out terminal (T02) as a power source for additional controls if needed. It
is protected by the 10A fuse on the base PCB.
TROUBLE SHOOTING
The HAMF-8 / 4 is designed in such a way that parts replacement are easy and of minimal costs in
comparison to the cost of the whole unit. There are 21 / 16 plug-in relay cards of only 13 different types.
ESR and FMR are the same while there are 8 / 4 nos. of FAR. The only electronic components on the
base PCB are 3 nos. 6A 1000V rectifier diodes. Their function is to blow the fuse in case of reverse
polarity connection of the input supply. They also help to absorb feedback from inductive load which may
be harmful to some of the relay cards. Lastly, they block the energy stored in the 10,000uF 50V capacitor,
from flowing out when there is a sudden drop in voltage while the Start Relay is being cranked.
Before we continue further, there is one thing you should take note. The most expensive and difficult to
replace part of the HAMF-8/4 is the base PCB. Therefore, care should be taken, to ensure it does not get
damaged. Here are few pointers:
1) Only replace with correct amperage fuse i.e. 10Amps. Two spare fuses are provided. Even though the
base PCB track width is 3 times (3mm) the relay cards track width (1mm), the high energy of a battery
can damage it, if not protected by a fuse.
2) Do not allow small metal parts like screws, washers etc. to fall in between the base PCB and metal
panel. The reason is obvious.
Page 14
HOKKIM
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Control & Protection Relays