MULTICAL® 803
Kamstrup A/S · Technical description · 5512-2360_A1_GB_02.2019
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Troubleshooting
MULTICAL® 803 has been constructed with a view to quick and simple installation as well as long and reliable
operation at the heat consumer. Should you, however, experience an operating problem, the table below can be
used for troubleshooting. Should it be necessary to repair the calculator, it is recommended only to replace parts
such as backup battery, temperature sensors and communication modules. Alternatively, the whole meter should be
replaced. Major repairs must be made by Kamstrup A/S.
Before sending us a meter to be repaired or checked, please use the error detection table below to help you clarify
the possible cause of the problem.
Symptom
Possible reason
Proposal for correction
No backlight in the display.
Mains supply is interrupted.
Investigate the cause and connect the
mains supply.
No function on the display (no
visible segments in the display).
Backup supply is missing.
Replace the backup battery
No function in modules 3 and 4.
MULTICAL® 803 is available in 2
versions. Only one version has supply
of all 4 modules.
Please contact your nearest Kamstrup
distributor for modification of the
meter (see paragraph 4.9)
No energy accumulation (e.g.
MWh) and volume (m
3
)
Read “INFO” in the display
Check the error that the info code
indicates (see paragraph 7.8)
If “INFO” = 00000000
Check that the flow direction matches
the arrow on the flow sensor
If “INFO” = xXxxxxxx, xxXxxxxx or
xXXxxxxx.
See the “INFO” overview (paragraph
7.8) and check the temperature
sensors. If defective, replace the
sensor pair.
Accumulation of volume (m
3
), but
not of energy (e.g. MWh)
Read “INFO” in the display
“INFO” = x99xxxxx indicates invalid
differential temperature (t1-t2)
Inlet and outlet sensors have been
interchanged in either installation or
connection
Mount the sensors correctly
Heat/cooling cut-off
θ
hc
has been
configured at a too low value
Reconfigure
θ
hc
at a suitable value, or
configure
θ
hc
at 250 °C, thereby
disconnecting the cut-off function.
Incorrect accumulation of volume
(m
3
)
Incorrect configuration of the meter
factor
Check that the meter factor on the
flow sensor matches the calculator.
Incorrect temperature reading
Defective temperature sensor
Insufficient installation
Replace sensor pair
Check the installation
Temperature indication a little too
low, or accumulation of energy (e.g.
MWh) slightly too low
Bad thermal sensor contact
Heat dissipation
Too short sensor pockets
Make sure that the sensors are
pushed to the bottom of the sensor
pockets
Insulate sensor pockets
Replace by longer pockets
The optical interface is not
responding.
Optical interface deactivated
Optical read-out head positioned
incorrectly
See the heart beat and status
indications in paragraph 6.
Turn the optical read-out head, so
that the cable points upwards.