Progressive International Electronics C2000 - Manual (Page 16)

C2000 Operation
‚ 10
If the transaction is a stacked sale (A/B), it is important to select
the correct sale with the key before the method of payment
— or key — is pressed. The status
indicators show the state of a transaction, such as call for service,
collect, etc. (Refer to the Quick Reference Guide for general sales
procedures.)
Should it become necessary to stop all of the dispensers due to an
emergency condition, press the large red button on the front edge
of the C2000. This will place all of the dispensers in a stopped
condition until the operator clears the emergency. This is
accomplished by selecting each dispenser with the key
and then pressing the key.