Siemens IQHeat, Руководство пользователя, Страница: 41 / 48

IQHeat
User manual
39
13
Troubleshooting
Symptom Cause Action
Hot water
temperature too
low The set point is incorrect
Adjust the HW set point
Control valve not working Check that the valve is working by
running in manual mode from the control
unit up/down, or check to see if the
valve reacts to changes to the set point.
Request service support on out of
service.
District heating filter clogged Order
service support Order service support
Controller set in manual mode Set the controller in Auto mode
Hot water
temperature too
high The set point is set too high Adjust the HW set point
Control valve not working See above
Knob on the valve can be manually
adjusted Check the knob on the valve/actuator.
This works in this case as a minimum
limit for the degree of opening.
Controller set in manual mode Set the controller in Auto mode
The heating
system
temperature is too
high or too low The heating automation may need to
be adjusted Adjust the heating curve in the control
unit. Change the heating curve
parameters to ensure that the flow
satisfies the requirement.
ECO function incorrectly set Change in temperature of the Heating
limit (ECO)
Time schedule incorrectly set Change the day/weekly schedule to
ensure the system works as desired
No heat in the
heating system
The circulation pump is not working Check that the power is on and the
fuses are intact.
If the pump is controlled from the
controller station, make sure it is
running, in a day/weekly schedule, ECO
function.
Check that the pump is not set in
manual off mode.
Too little water in the system Top up the water
Air accumulations at the heat
exchanger or in heating circuit Bleed the expansion tank and the
heating circuit (radiators)
Disturbing noises
in the radiator
system (buzzing) Capacity to high in the pump Lower the pump capacity by switching to
a lower number on the pump's power
switch if applicable; change the settings
in the differential pressure controlled
pump control, if necessary.
Fluctuating
temperatures, HW,
or heating, clicking
in the heating
system Incorrect control of HW or heating Adjust the control parameters or call
Service support
Flow, heat or hot water circulation too
low Increase the pump speed by changing
to a higher power level if possible, or
adjust by opening the throttle valve if
fitted.
Need to frequently
replace water in
the heating system The expansion tank cannot deal with
the changes in volume. Order service support to check the
expansion tank's volume receiving
section and pre-pressure or for possible
leaks
Leakage
Temperatures too
low for both
heating and hot
water Clogged district heating filter Order service support
District heating temperature too low Contact the district heating supplier