User Manual
   POS4000 
Document Number: POS4003  130  
Document Title:  POS4000/V2 Operations Manual 
The Serial Baud rate may also not correspond to the BAUD rate on the Ext POS 
Device. 
Solution: Change the POS type or Baud rate to the correct one. Remember, 
when you change the Baud Rate you must power down the POS4000 then 
power it back up after making the serial baud change. 
Symptom: Some of the washes work but the codes (as checked using the check 
code key) are not the correct wash type. 
Cause: The POS Offset value may need to be adjusted or the POS MAX 
WASHES value is set incorrectly. 
Solution: Review the above procedure concerning the POS offset. The POS 
MAX WASHES value is typically set to 0 (feature disabled). This value is only 
used on Chevron sites when connected to a Dresser/Wayne Wayne + 
Symptom: Cashier ticket does not print out a code 
Cause: You may have a version of console that has 6.1 hardware and requires 
an adapter for the Cable. 
You may also have a Hardware or Cable problem. 
Solution: Verify if the main board hardware is Version 6.1 or not. If so acquire an 
SA1606 adapter from Unitec Electronics. 
To diagnose a Hardware problem, Unitec Provides a Windows based software 
package for Wash manufacturers and Distributors to test the Communications 
port when connected to a PC laptop computer. This package is called 
“POSTEST” and is available at a small cost to Field technicians. 
Appendix H. APPENDIX VII - Multiple Unit Configuration 
The POS4000 system is capable of controlling multiple customer interfaces 
(carwashes or bays) and multiple points-of-sale (POS4000 consoles). This is a 
Standard feature for Version 2 units. If this feature is not present and you want 
to acquire it, you should contact your carwash sales representative to order a 
software upgrade. The same version of software must be used on each console 
you have on the same system. In addition, the software in the Coin boxes must 
also be of the same version if you are using coin boxes with the Unitec POS4000 
interface board. If you are using multiple Hamilton Autotecs please contact 
Hamilton MFG for any questions on compatibility. 
Each console and customer interface board is connected to the 2-wire 
communication network and is assigned a unique unit number or address. A 
single POS4000 controller (main) console must act as the network controller.  
 The terms unit number and address are interchan
Note: 
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eable. 










