LM_MDS2000_BA_02_0810
Troubleshooting Page
23/44
1.5.1 Communication
problems
The display of the
keypad shows:
and does not
switch to the prompt:
- The network cable is wrong.
- You have a "Star" network and not a "In line" network.
- The jumper sockets are not in the "IN" position at the beginning and the
end of the CAN bus (120 Ohm between CAN H & CAN L): see jumper
sockets IN or OUT.
IN:
Resistor is fitted between Can H and Can L
OUT: Resistor is not fitted between Can H and Can L
- The RAM is overloaded: Remove it, do a short-circuit between the
different pin's, replace it. The RAM is the sip No. U5 – HM628128LP.
- If you don't remember a PIN code.
Emergency PIN for lost supervisor PIN.
We have introduced a method to release systems where the Supervisor PIN
has been lost or illegally changed. This is based on time and date and gives
a different PIN every hour.
If the customer calls needing the PIN he should be asked for the time and
date which is shown on the display every minute.
You have then to make the following calculation:
Month x7891
Day x3456
Hour x4567
The PIN code to use will be the last 4 numbers of the addition.
Example: We are the 21st January 1998 – 11.35 AM
01 x7891=
7891
21 x3456=
72576
11 x4567=
50237
130704
the right code is 0704
Now get the customer to enter an invalid PIN to reset the 9999 counter.
He should now enter 9999 twice followed by the PIN calculated above.
On each entry the invalid PIN message will be shown.
At this point the default PINs will be reset. (i.e. 9999 – 1111 and 2222)
VERSION
n°
#.++
I.D.: x
Date of version
Enter PIN No.
- - - -
