Unitec POS4000/V2 - Manual (Page 107)

POS4000
Document Number: POS4003 99
Document Title: POS4000/V2 Operations Manual
9.5 Customer Buzzer Failure
If the buzzer on the interface board does not beep when customer keys are
depressed first check the keypad by entering a code such as "123450". Verify
your entry on the POS4000 main 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.
9.6 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activate the wash and is no longer valid check the car wash "In-use" as follows.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:
Car wash is empty and available for use
First customer enters valid code causing the Enter Wash relay to close
First customer drives into car wash
Wash in-use signal turns on causing Enter Wash relay to open
Second customer enters a valid code (wash in-use is still on) causing Code
Accepted/Wait relay to close
If relay stacking is disabled then the function relays will close now
First customer leaves bay