NOYAFA NF-826 User Manual Download Page 16

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Items to be checked

Measures to be taken

Install new batteries

Has the battery been installed?

Is the electrical amperage of the
battery too low?

Is the polarity of the battery
correct?

Malfunction

Can not turn on
the machine

Transmitter cannot
identify external
voltage

Grounding rod

Carry bag

User manual

Color box

6. REPAIR AND MAINTENANCE

1.If the detector is suspected of malfunctioning , please confirm that the electrical
amperage of the battery is sufficient and the test lead is not broken.
2.Before sending back the detector for repair, please dismantle the battery and describe
the phenomenon of malfunction,and then properly pack the apparatus to avoid damaging
it during transportation. For damages caused during transportation, the company would
assume no responsibility.
3.There is a fuse within the transmitter. If it is damaged during the guarantee period, it
can only be replaced by technical personnel of the company. If it is damaged after the
guarantee period, please replace it with a fuse of the same model by yourself. This fuse
is single metal wire fast-melting type, so do not replace it with a helical metal wire of
delayed type, otherwise the transmitting power and safety of apparatus cannot be
guaranteed.

6.1 Troubleshooting

If the detector does not work properly, please check the items in the table below:

7. ACCESSORIES

Transmitter

Receiver

Test Lead

Crocodile clamps

Test probe

1pc

1pc for each color
(Red/black )

Built-in battary

1pc

2pc

6.3 Cleaning

1.Before cleaning work, please make sure that the equipment has been turned off, and
all the circuits have been cut off.
2.During cleaning work, please do not use benzene, alcohol, acetone, ether, ketone,
thinner or gasoline, which would make the equipment deformed or decolored.
3.After cleaning, use the equipment again when it is completely dry.

Use a rag dipped with clean water or neutral detergent to wipe the transmitter, and then
use a dry rag to wipe it again.

6.2 Checking of the fuse of the transmitter

The fuse of the transmitter can prevent the transmitter from being damaged by overload
or wrong operations. If the fuse in the transmitter has already been melted down, the
transmitter can only transmit weak signals. If the self-check of transmitter is passed but
the signal transmitted is weak, it means that the transmission is sound but the fuse has
been melted down. If no signal is found during the transmission status self-check of the
transmitter, and the voltage of battery is normal, it means that the transmitter is broken
and should be repaired by special technicians.

Specific methods and steps to check the fuse of the transmitter:

1) Break all the measuring circuits of the transmitter;
2) Turn on the transmitter and put it in the transmitting status;
3) Set the transmitting power of transmitter to level I:
4) Connect one end of the test lead to the joint

⑪

of the transmitter;

5) Insert the other end of test lead into the connecting socket of the transmitter;
6) Turn on the transmitter to search for the signals from the test lead, and move the probe
of the receiver towards the test lead;
7) If the fuse is not broken, the value displayed on the receiver will be doubled.

Check the polarity

Is the contact sound?

Reconnect the line

Is the probe broken?

Replace the probe

Has the probe been inserted to
the bottom?

Properly insert the probe

Is the test lead broken?

Replace the test lead

Has the test lead been inserted
to the bottom?

Property insert the test lead

The transmitter
cannot receive the
signals transmitted
by itself