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17
Värmebaronen EK 15E
Troubleshooting
Intervention that requires tools must be performed by a qualified electrician!
Fault
Possible cause of fault
Action
Indicators and
display off.
The electric flow heater
has no power.
Check the main fuses.
Switch off.
Set switch to position. Connection delay can restrict output staging.
Control fuse triggered.
Check where the short circuit is, take remedial action and then reset the fuse.
Malfunction of the control
electronics.
Change the circuit board.
Group fuse is
triggered.
Immersion heater faulty.
Check the insulation of the immersion heaters, which are accessible when
the electric flow heater's lower front plate and insulation are removed.
Change the defective container with immersion heater. Check that the power
cables are not against the electrical connections.
The electric
flow heater
does not step
up power even
though the
temperature
in the electric
flow heater is
lower than the
set value.
The boiler electric flow
heater has been restricted.
Check the "Number of output stages" adjustment.
The electric flow heater
is controlled by external
signal.
Check the voltage of the signal.
Outside temperature
compensator connected.
Check the settings for the UTK function.
Temperature sensor
defective.
Take control measurements of the temperature sensor.
The sensor must not be connected to the circuit board during resistance
measurement.
When the boiler is energized, voltage is measured in the sensor's connection
points at the PCB.
Boiler
temperature
°C
kΩ
V
°C
kΩ
V
°C
kΩ
V
5
141.9 4.7
40
30
3.7
75
8.2
2.3
10
111.6 4.6
45
24.6 3.6
80
6.9
2
15
88.3 4.5
50
20.2 3.3
85
5.8
1.8
20
70.3 4.4
55
16.7
3.1
90
5
1.7
25
56.3 4.2
60
13.9 2.9
95
4.2
1.5
30
45.4 4.1
65
11.6
2.7
100
3.7
1.3
35
36.8 3.9
70
9.7
2.5
Outdoor
temperature
°C
kΩ
V
°C
kΩ
V
-40
88.7 4.5
0
8.8
2.3
-35
64.2 4.3
5
6.8
2.0
-30
47.0
4.1
10
5.4
1.7
-25
34.7 3.9
15
4.2
1.5
-20
25.9 3.6
20
3.4
1.3
-15
19.5 3.3
25
2.7
1.1
-10
14.8 3.0
30
2.2
0.9
-5
11.4
2.7
Uneven
regulation,
the electric
flow heater
steps up a
few stages
and is then
immediately
stepped down,
etc.
Water flow through the electric flow heater is too low.
Check that circulation pumps and valves are working.
This is an easy way to get an idea of the level of flow through the electric flow heater:
1. Limit the output stages of the electric flow heater so that the output is constant, e.g.,
to four output stages.
2. Allow the electric flow heater's temperature to stabilise.
3. Measure the temperature increase between the return and flow lines of the electric flow heater.
4. Calculate the flow through the electric flow heater using the formula below.
5. Check against the flow details whether the flow is adequate.
q = P / (∆t x 1.16)
Q = water flow in m3 / h. (m3 / h x 1000 / 3600 = litre / second)
P = electric flow heater's delivered output in kW
∆ t = temperature difference between the electric flow heater's return
and flow lines in °C.
1.16 = water's thermal absorption coefficient.
