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ALARM, HIGH RETURN TO THE HEAT PUMP
To reset the alarm
: The alarm resets itself and the heat
pump starts automatically when the temperature has
dropped.
ALARM (GT9)
High return HP
020301 15:10:18
Info Ackn.
Probable causes and actions:
The heat pump has a sensor that stops the heat pump for safety reasons when the return temperature is
too high, about 48°C
•
The temp. incr/decr dial is set so high that the heating system return temperature is too high.
Action:
Reduce the temp. setting.
•
The hot water temperature is set too high.
Action:
Contact the installer.
•
The radiator valves or the underfloor heating system are closed.
Action:
Open the valves.
•
The flow across the heat pump is greater than the flow in the heating system.
Action:
Reduce the speed of the heat pump circulation pump or increase the speed of the main pump
in the heating system. Contact the installer.
SENSOR ALARM
To reset the alarm
: The alarm resets itself and the heat
pump starts automatically when the fault has been cor-
rected.
ALARM (GT1)
Sensor return rad.
020301 15:10:18
Info Ackn.
Probable causes and actions:
Alarm if a sensor fault can be indicated for all sensors that are connected to the heat pump. The exam-
ple shows the alarm for the Return radiator, GT1 sensor. The principle is the same for all sensor alarms.
•
Short circuit or broken cable to sensor.
Action:
If you have an instrument that can measure resistance, you can check the resistance of the
circuit and compare with the table for sensors in Technical spec. Or contact your installer.
•
Faulty sensor.
Action:
Contact the installer.
•
Faulty connection.
Action:
Contact the installer.
•
Temporary fault.
Action:
Wait and see.
HEAT TRANSFER FLUID SYSTEM OUT MAX
ALARM
To reset the alarm
: The alarm resets itself and the heat
pump starts automatically when the temperature has
dropped.
ALARM (GT8)
HTF out max
020301 15:10:18
Info Ackn.
Probable causes and actions:
The heat pump has a sensor that stops the pump for safety reasons when the outgoing temperature is
too high at around 75°C.
•
Not enough flow over the heat pump
Action:
Check that the circulation pump has not stopped and that a valve in the system is not closed.
•
Particle filter on the hot side is clogged.
Action:
Check the particle filter and clean if necessary.