VUIGI102 | 13© Danfoss | 2018.01
4.3.2. Error codes
Error code may consist from up to 4 symbols. Each symbol may have values 0…8
Code Description
Status of calculator
0 - no error, normal operation
1 - warning – ending battery life
2- temperature difference is greater than the permitted limits
4- temperature difference is less than the permitted limits
8- electronics failure
Status of temperature sensor 2 (return pipe)
0- no error, normal operation
4- short circuit
8- sensor failure (open circuit or short circuit)
Status of temperature sensor 1 (flow pipe)
0- no error, normal operation
4- short circuit
8- sensor failure (open circuit or short circuit)
Status of flow sensor
0- no error, normal operation
1- no signal, flow sensor is empty
2- flow flows in an reverse direction
4- flow rate greater than 1.2∙qs (are displayed q=1,2qs)
8- electronics failure
Active error codes are added and simultaneously displayed, if it is detected more than one error:
3 - corresponds errors 2 + 1
5 - corresponds errors 4 + 1
7 - corresponds errors 4 + 2 + 1
9 - corresponds errors 8 + 1
A - corresponds errors 8 + 2
B - corresponds errors 8 + 2 + 1
D - corresponds errors 8 + 4 + 1
E - corresponds errors 8 + 4 + 2
F - corresponds errors 8 + 4 + 2 +1
In a case when value at least one digit of error code is ≥ 8 : calculation of thermal energy and
summation of volume of water and operation time without errors are stopping.
In the case of the flow sensor error “4” : duration of time of error condition (when the flow rate
“q> 1.2 ∙ qs”) is registered additionally.
4.4 Remote data reading
For data transmission from meter it can be used optical interface. The optical head is placed on the
calculator and is connected to reading device. In addition for remote reading of data can be used two
pulse outputs, or one of the following communication modules:
- M-Bus module
- RF module 868 MHz
- MODBUS RS485 module
- BACnet RS485
All communication interfaces do not affect the measured parameters and their calculation, and
therefore can be replaced by another type without removing of verification seal.
4. Operation of calculator
(continuous)
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