IVT Greenline D14 Manual To Installation, Commissioning And Maintenance page 26

ALARM
High return HP
020301 15:10:18
Info
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.
ALARM
HTF out max
020301 15:10:18
Info
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.
ALARM
Sensor return rad.
020301 15:10:18
Info
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.
(GT9)
Ackn.
(GT8)
Ackn.
(GT1)
Ackn.
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.
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.
SENSOR ALARM
To reset the alarm: The alarm resets itself and the heat
pump starts automatically when the fault has been cor-
rected.