- 10 -
• 8 – supply temperature sensor damaged or temperature outside of range;
• 16 – temperature sensors interchanged or negative differential temperature; indicated if |∆T| >
0.3°C, the error is saved to archive data if |∆T| > differential temperature insensibility value;
• 32 – exceedance of maximum flow Qs = 2 * Qp computed as mean for one minute;
• 64 – error when writing to flash memory – flash failure;
• 128 – battery voltage below minimum value (3.0 V – writing of archive data to non-volatile memory is
disabled; replace the battery in 60 days or following the heating season);
• 256 – non-standard exceedance of rated flow (Qp < Q <= Qs) during 1 hour per every 24 hours;
every 24 hours counted from the first occurrence of exceedance. If during the immediate 24 hours
from the exceedance's detection the time of exceedance is greater than 1 hour, an error will be raised.
The error is deleted after 24 hours from the detection of exceedance;
• 512 – non-standard exceedance of rated flow (Qp < Q <= Qs) during 200 hours per year; a year is
counted from one settlement period to the following settlement period (the moment of recording
annual data); if within this period the flow is exceeded by at least 200 h, an error will be raised until
the end of the settlement period,
• 1024 - Temperature differential too low: This error is indicated when the mean temperature differen-
tial during cycle 1 is below the preset energy totalling threshold; default setting: 2.7°C (customizable
on order).
• 2048 - Periodic comparison of the firmware memory CRC to the stored pattern; this error is indicated
if the comparison outputs a mismatch.
Error codes can be added up, e.g. "Er 12" means that both sensors are damaged. Errors are automatical-
ly deleted once their cause(s) have been removed. Even one instance of an error is recorded in the ar-
chive data. The incorrect operation time meter is incremented only if the error persists for a whole hour.
There is a special archive of emergency operation (failure) states described further in the user manual.
When an error consisting in damage of contents of heat consumption register is raised, correct data are
read into the registers from nonvolatile memory. If loading of data is impossible due to a nonvolatile
memory failure or when the battery power is too low (below 2.8V), a proper message is displayed and
the heat meter stops metering.
Error
Lou BAt
flash memory corrupt battery voltage too low
When errors 2, 4, 8, 16 and 1024 occur, no energy is calculated.
5.1.7. Real time and working time
The data of the real time clock is updated each second, yet its display is in the service data group. The
user can modify the data. The calendar automatically switches to Polish daylight saving time and back.
Automatic switching to and from the daylight saving time can also be disabled. The RTC is based on
a standard 32768 Hz quartz crystal the accuracy of which depends on the ambient temperature. Since
the heat meter is operated at varying temperatures of as much as 90 ºC, the clock readings can have a
significant error of as much as several minutes per month.
The operating time and the error operating time are counted in hours. The error operating time count
increases only if an error persists for a whole hour.
Working time:
The heat meter has been provided with two registers for calculation of working time. Working time is
calculated in minutes but it is displayed in hours:
To Next Page
Loading...
Need help?
General
