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instructions, or the quick guide delivered with the source
pump.
9.15 Room sensor (accessory) QAA55.
For connection refer to the electrical diagram and the
instructions delivered with the room sensor.
CL+ / CL-
Room sensor
Connector b
QAA55
9.16 Room unit (accessory) QAA75.
For connection refer to the electrical diagram and the
instructions delivered with the room sensor.
9.17 Alarm forwarding
The possible heat pump alarms can be forwarded e.g. to
building automation or a modem. The alarm forwarding is
connected to the fault relay K10 on the control centre.
Closing alarm information (NO) is received from
connectors 11/14 and opening alarm information (NC)
from connectors 11/12. Use a 2-pole cable with a cross-
2
sectional area of 0,5mm
9.18 External control of the source pump
The source pump can be activated by an external potential
free switch data. The function can be used when cooling
with the collector.
Turning the switch off will activate the source pump.
For connection refer to section Appendix 4: Electrical
diagrams.
H3 / M
Consumer's call VK1
Connector e
NO, closing switch
v2-7 24052017
at the minimum.
Source pump's external
control
Potential free switch
data
9.19 Home/Away switch
External home / away switch can be connected to enable
heat pump's drop / raise functions. By turning off the
switch, domestic hot water operating mode changes to
economy and the heating circuits will change to a reduced
level. By turning the switch on, domestic hot water
heating is activated and the heating circuits will return to
the chosen operating mode.
The switch must be a potential-free closing switch and it
is connected to the controller's connector e H1/M
For connection refer to appendix 4 Electrical diagrams.
9.20 Call for heating 0-10V
The heat pump can be controlled with an external call for
heating control. The 0-10V control message is used to
give the heat pump a set point, which is created to the
heating accumulator with the heat pump.
The function must be activated in the heat pump's Expert
menu. Refer to section Site-specific definition / Call for
heating
H1 / M
Consumer's call VK2 10V
Connector e
Control message 0 – 10V
9.21 External prevention of activation
The heat pump can be given a prevention message for
activation with an external potential free switch. In this
case, the compressor and electrical heaters are locked. The
heat pump will return to normal functioning once the
message has been removed. The function can be used, for
example, if there is a lot of simultaneous electrical load at
the property. With this function, the activation of the heat
pump can be prevented. For connection refer to section
Appendix electrical diagram
COMPRESSOR'S EXTERNAL
ACTIVATION PREVENTION
E6
9.22 Tariff control
The electric utility's low tariff message can be received
via the EX3 input. The external control must be a potential
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Troubleshooting
