TECHNICAL DESCRIPTION MULTICAL
®
401
5512-091 GB/02.2008/Rev. J1
71
16
Trouble shooting
MULTICAL
®
401 is constructed with a view to fast and simple mounting as well as long-term, reliable operation at
the heat consumer’s.
Should you, however, experience an operating problem with the meter, the error detection table below can help
you clarify the possible reason.
In connection with repair, if necessary, we recommend that only battery and temperature sensors, and
communication modules are replaced during service, alternatively the whole meter must be replaced.
Major repairs can only be made in our factory.
Before you send in the meter for repair, we ask you kindly to go through below error detection table to help clarify
the possible cause of the problem:
Symptom
Possible cause
Suggested corrections
No display function (blank
display)
No power supply
Replace the battery or check the
mains supply. Is there 3.6 VDC on
terminal 60(+) and 61(-) ?
Read “info” on the display.
Check the error indicated by the
info code. (See section 7.4)
If “info” = 000
⇒
Check that the flow direction
corresponds with the arrow on the
flow sensor
IF “info” = 004, 008 or 012
⇒
Check the temperature sensors. If
defects are detected, replace the
sensor set
No accumulation of energy (e.g.
MWh) and volume (m
3
)
IF “info” = 016
⇒
There is air in the flow sensor.
Release air from the system and
check the meter once more.
Accumulation of volume (m
3
),
but not of energy (e.g. MWh)
Flow and return sensors have been
reversed, either during installation
or connection.
Mount the sensors correctly
No accumulation of volume (m
3
) Flow sensor angle is incorrect
Check that the flow direction
corresponds with the arrow on the
flow sensor
Incorrect temperature indication Defective temperature sensor
Insufficient installation
Replace the sensor pair.
Check the installation
Temperature display is too low
or accumulated energy is too
little (e.g. MWh)
Poor thermal sensor contact
Heat dissipation
Sensor pockets too short
Place the sensors in the bottom of
the sensor pockets.
Insulate the sensor pockets
Replace sensor pockets with
longer ones
Summary of Contents for MULTICAL 401
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