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Installation
Indications,
functions and options
Messages
Commissioning
Operation and function
PWM feedback signal
PFB1, PFB2
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 flow 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 flow rate will not be indicated and the heat quan-
tity measurement will not be carried out.
Maximum store temperature
S MX / S1MX / S2MX
Maximum store temperature
Adjustment range: 4 … 95 °C [40 … 200 °F]
Arr 10: 4 … 90 °C [40 … 190 °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-adjusta-
ble 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].
Store emergency shutdown
OSEM
Store emergency shutdown option
Adjustment range: ON, OFF
Factory setting: OFF
This option is used for activating the internal store emergency shutdown for an up-
per store sensor. If the temperature at the reference sensor exceeds 95 °C, store 1
will be blocked and loading will be stopped until the temperature falls below 90 °C.
Note
Sensor S3 is used as the reference sensor in systems 1, 2, 3, 8, 9 and 10. In
systems 6 and 7, sensor S4 is used as the reference sensor. The option is
not available in systems 4 and 5 and it will only be available in systems 6
and 7 if the heat quantity measurement option is not activated.