National Crane 600H, Руководство по обслуживанию

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ELECTRIC SYSTEM 600H
3-12
08-19-2022 Control # 092-13
radio frequency transmitting function. The current draw for
the rest of the electronics in the transmitter is in the micro-
amp range. For instance, when the transmitter power switch
is on and the unit is not being used, the current draw is less
than one milli-amp. This means that leaving the power switch
in the ON position over night will not necessarily mean that
the 9 volt battery will be dead. The system requires a battery
that has a minimum voltage of 7.2 volts for satisfactory
operation. Rechargeable batteries are not recommended
because of their poor charge memory. Their ability to take a
charge tends to degrade over time.
To install the 9 volt battery, remove the battery cover on the
rear of the transmitter. Removal of the battery cover is easily
achieved by releasing the latch clip. Care should be taken
not to use excessive force to prevent damage to the cover.
Insert the battery making sure the polarity of the terminals
are correct.
Transmitter
As with any electronic device, care should be taken not to
subject the transmitter to excessive abuse. The radio
transmitter is a very rugged instrument and will withstand
normal use. The transmitter housing is made of a durable
material and will serve many years of use. The toggle
switches are industrial grade, self-cleaning, environmental
sealed switches. To remove dirt, grease, oil, etc., wipe with a
cloth soaked with soap and water.
For those hard stains, a light alcohol based cleaner should
be used. Should moisture build up inside the housing,
remove the cover and allow to air dry. This process may be
sped up using a blow dryer set on a low heat range.
Quick Test for Receiver Antenna and Cable
Test the antenna harness with points A, B, C, D.
Test Point A — Inner Conductor of Connector
Test Point B — Outer Connector Housing
Test Point C — Larger Ring Terminal
Test Point D — Small Ring Terminal
Using an ohmmeter set at the minimum resistance scale,
make the following measurements with the antenna cable
disconnected from the receiver. With one meter test lead on
“A” and the other on “B”, there should be no continuity
(Maximum resistance reading). Next, attach one meter lead
to “A” and the other to “D”. There should be minimum
resistance (near 0 ohms). The same will be true at points “B”
and “C”. To do these last tests, another wire may have to be
used to extend the leads.
Troubleshooting
1. Begin the process of elimination by always checking the
fuse in the receiver first and then checking all wiring and
connectors (Look for dead shorts in wiring and
connections).
2. If the transmitting range drops or intermittent movement
occurs when activating a function, read the following:
a. Make sure the 9 volt battery is good in the
transmitter.
b. Be sure the antenna is free of vertical metal
obstruction (minimum 2 feet).
c. Any excess antenna cable should not be coiled
together.
d. Check antenna cable connector at the receiver. Be
certain the antenna is properly installed and that
there is nothing touching the bare portion of wires at
the antenna connection.
(Be sure antenna is
installed properly.)
3. If a unit fails completely or if just one or two outputs are
not working, check the following:
a. Remove cover on the receiver and refer to the
“ R e c e i v e r P r i n t e d C i r c u i t B o a r d ” d r a w i n g ,
Figure 3-6, in the installation instructions.
b. With power to the receiver, the Power Indicator LED
will be on. Turn transmitter power on. At this time the
receiver’s RF Indicator LED will be on for 10
seconds and you will hear the power relay engage.
(Anytime after transmitter power is on, a function
may be activated.) To verify that the power relay is
engaged and that the transmitter is transmitting,
activate the emergency stop on the transmitter. This
will disable the power relay and the transmitter will
t r a ns mi t f o r 1 0 s e c o n d s . T h e R F a n d P o w er
Indicator LED’s will be on. During this time any
t o g g l e s w i t c h a c t i v a t e d w i l l o n l y s e n d t h e
emergency stop signal. To reset the receiver and
transmitter, turn the transmitter power off and back
on. At this time the receiver’s RF Indicator LED will
be on for 10 seconds (without activating a toggle on
the transmitter) and you will hear the power relay
engage.
1. When a function is activated on the transmitter,
two or three LED’s are turned on in the receiver:
( 1 ) R F I n d i c a t o r L E D , ( 2 ) O ut pu t S ta tu s
Indicator LED, (3) Master Control LED (may or
may not be utilized on the equipment).
2. With power relay engaged, check each function
by activating each toggle. Make sure that each
of the receivers Output Status Indicator LED’s
turn on. Suppose the appropriate Output Status
Indicator LED doesn’t come on, read ahead
through 4.
3. If the power relay doesn’t engage, there is a
possibility that the address codes are not
REFERENCE ONLY