Unitec POS4000/V2-Wash Select II - Manual (Page 114)

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Document Number: POS4007 88
Document Title: POS4000/V2 WSII Operations Manual
console display. If no customer code is shown it is probably a keypad problem, therefore perform
the customer keypad service tests. If the code entered appears on the console display, the
customer buzzer is bad and you should replace the interface board.
9.4 Code Stacking Does Not Work
Stacking allows a second customer to be processed while a first customer is still in the carwash.
In order for stacking to work properly, the wash in-use signal must turn on and remain on for the
duration of the first customer's wash. The wash in-use LED on the interface board can be used
to determine if the interface board is receiving the wash in-use signal
If a valid code is entered while a car is in the wash and this code does not activate the wash and
is no longer valid check the car wash "In-use" as follows. When the car wash is in use, verify that
the "Wash In-use" LED on the interface card is on. If the In-use signal turns off or flickers prior to
the car leaving the car wash, stacked car wash activation signals are probably being sent to the
car wash prior to finishing the previous wash. If this happens, the car wash will typically ignore
that activation code.
Following is the sequence of events that should occur in a normal operation:
1. Car wash is empty and available for use
2. First customer enters valid code causing the Enter Wash relay to close
3. First customer drives into car wash
4. Wash in-use signal turns on causing Enter Wash relay to open
5. Second customer enters a valid code (wash in-use is still on) causing Code
Accepted/Wait relay to close
6. If relay stacking is disabled then the function relays will close now
7. First customer leaves bay
8. Wash in-use turns off causing Code Accepted/Wait relay to open and Enter Wash relay
to close
9. If relay stacking is enabled then the function relays will close now
10. Second customer drives into car wash
11. Wash in-use signal turns on causing Enter Wash relay to open
12.
Note:
Refer to the System Configuration Report to determine if relay stacking is enabled or
disabled, and if your system allows Customer Stacking.
9.5 "Enter Wash" Signal Does Not Work
The "Enter Wash" feature produces a relay contact closure when any wash program is activated
(either by a valid customer code or cash). This relay stays on until the wash "In-Use" signal turns
on for that customer. In many circumstances, the "Enter Wash" signal for customer lights is