Alliance Laundry Systems NK120 用户手册

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All card insertions should be reflected on the FEC 
display in some manner. For example, if a valid cash 
card is inserted into the reader, the FEC display should 
show the balance on the card.

A simple test is to insert any non-smart card (credit 
card, etc.) into the reader. The display should display 
an EC:20. This indicates that the reader recognizes a 
card has been inserted, but it cannot read it. Also this 
verifies that the reader is communicating successfully 
with the Front-End Control (FEC).

If the card insertions are not reflected on the FEC 
display, one of the following conditions has occurred:

• Card reader harness not hooked up or wired 

incorrectly.

• Card reader is not recognizing card insertions.
• Card reader is not capable of communicating with the 

FEC.

• If a network board is present, it has malfunctioned.
• FEC has malfunctioned, and is not supplying power 

to the reader.

• FEC has malfunctioned, and is not capable of 

communicating with the reader.

If the FEC senses that a card reader is present and the 
reader fails to communicate with the FEC, it will 
display an EC:19 error after 2-1/2 minutes. However, if 
the FEC never recognized that the reader was present at 
power-up, there will be no error displayed to indicate 
that there is no communication with the reader.

If a Network Board (NWB) 

is present, it is possible that it has malfunctioned. A bad 
NWB can prevent the reader from communicating with 
the FEC, resulting in an EC:19. Before powering down 
the unit, examine the LED on the NWB.  If the LED is 
NOT flashing one second on/one second off, it is not 
functioning correctly. It will need to be either reset ( by 
powering down then up again) or replaced.

If a Network Board is present, it is helpful to eliminate 
it, if possible, from the circuit temporarily for 
troubleshooting purposes. Unplug the harness from the 
NWB to the Card Reader, and also unplug the harness 
from the NWB to the FEC. Next, connect the harness 
which is used to connect a Card Reader directly to the 
FEC.

If the EC:19 disappears once the NWB has been 
removed (allow approximately 120 seconds), the NWB 
may need to be replaced, since the reader was able to 
communicate with a direct link to the FEC. Ensure that 
the reader is now operating properly by inserting 
several cards in the reader, and looking for the 
appropriate response on the FEC display.

Once the NWB is removed from the circuit, continue to 
"NWB Not Present" below.

Begin by checking the 

voltage to the card reader. The following 
measurements should be taken at the 14-pin header on 
the card reader. There should be between 24 and 38 
volts DC across pins 3 and 12. This voltage must be 
present, or the reader will not operate. Also, there 
should be 5 volts DC across pins 10 and 12. This 
voltage must be present, or the FEC will not recognize 
that the card reader is present.

If the voltages mentioned above are found to be present 
at the reader’s 14-pin header and the reader is not 
functioning correctly, the harness may be bad, the FEC 
may be bad, or the card reader may be bad.

First, disconnect the reader from the 14-pin header, and 
re-connect it. Wait about 20 seconds. If there was an 
EC:19 on the display, check the FEC display to see if 
the EC:19 has gone away. If it has, the communication 
has been re-established. The card reader may have 
experienced a lock-up condition, and should run fine 
once it has been reset by powering down and up again. 
Whether or not there was originally an EC:19 on the 
display, try several cards in the reader to ensure correct 
operation.