Pairing of a User Interface Unit with a Meter

A user interface unit (UIU) is a remote access terminal for STS prepayment meters. The device is placed inside the users premisses while the energy meter is mounted outside and mostly not direct accessible. Some meter manufacturers are using the term customer interface unit (CIU). The functions are the same.

The main purpose is to charge the meter with credit. By various short-codes it’s possible to do many kinds of queries for meter status and consumption. The short codes are not unified, so refer to your user manual for operation.

UIUs are paired with the energy meter when leaving our factory. Depending on the utility order CLOU interface units are communicating with the meter by radio frequency (RF), power line (PLC) or by wired RS485.

User Interface Unit

If the UIU is not communicating with the meter you can pair it again by typing 1593570 and the 11 digit meter number, then press the enter key (red or blue). The meter number is printed on the meter and on your customer card which you use to buy credit.
After successful pairing the display will show OK.
Note: This is only working for CLOU energy meters.

There can be also other reasons for a communication fail. If the UIU is connected by power line and you are disconnected, batteries need to be inserted in the UIU to recharge the meter or query the status. If this meter is in tamper mode, a recharge is impossible before clearing the tamper.

52 Replies to “Pairing of a User Interface Unit with a Meter”

  1. Transaction failed. The format of your account number is incorrect. Please check and try again with the correct format of your account number. my uiu give me that msg what shall I do

    1. The UIU has only 8 digits, so it’s impossible to show complex texts. I suppose you saw this message on your vending APP. The account number must match with your contract. Please check or ask your vending company.

  2. My uiu lost network and I got a second uiu. I tried pairing it with the code that you provided but after the ok message it doesn’t pair. It just displays the neighbors units

    1. The meters are automatically activated after two hours power-up. I suppose you need a clear tamper code.

    1. Your power company has CIUs for replacement. I don’t understand how an exchange can improve the current.

  3. Good evening sir, my prepaid meter doesn’t supply current to my house whenever there is low voltage., What do you think is the problem and what is the remedy. Thanks.

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