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Maximum speed
nMX
Maximum speed
Adjustment range: (10) 30 … 100 %
Factory setting: 100 %
In the adjustment channel nMX a relative maximum speed for a pump connected
can be allocated to the output R1.
Note:
The pump speed must be set to 100 % when auxiliary relays or valves are
connected.
PWM feedback signal
PFB
PWM feedback signal
Adjustment range: OFF, A, b
Factory setting: OFF
(A = Wilo pump, b = Grundfos pump)
With this parameter, the type of the PWM feedback signal of a bidirectional HE
pump can be adjusted. The signal transmits either a ow rate between 0 … 2100 l/h
or an error message.
The following messages can be displayed:
Err1: PWM interface of the pump defective
Err2: The pump is not running optimally, external cause electronics (e. g. overvolt-
age, low voltage)
Err3: The pump stops, but is operable, external cause electronics (e. g. overvoltage,
low voltage)
Err4: The pump stops, but is operable, external cause installation / hydraulics
Err5: The pump stops, but is not operable, internal cause electronics / pump is
stuck
Err6: PWM feedback signal connection defective
Note
If there is an error, the ow rate will not be indicated and the heat quan-
tity measurement will not be carried out.
Maximum store temperature
S MX
Maximum store temperature
Adjustment range: 4 … 95 °C [40 … 200 °F]
Factory setting: 60 °C [140 °F]
If the store temperature reaches the adjusted maximum temperature, the store
will no longer be loaded in order to avoid damage caused by overheating. A non-ad-
justable hysteresis of 2 K [4 °Ra] is set for the maximum store temperature.
If the maximum store temperature is exceeded, ☼ is displayed.
Note:
If the collector cooling or the system cooling function is activated, the
adjusted maximum store temperature may be exceeded. In order to pre-
vent system damage, the controller is also equipped with an integrated
store emergency shutdown, deactivating the system if the store reaches
95 °C [200 °F].
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