Dimplex Wärmepumpenmanager Bedienungsanleitung Seite 69

Troubleshooting
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Current status message
The low pressure pressure switch in the brine
circuit has switched.
Fault caused by primary pump or fan motor
protection
Fault caused by the low pressure pressure switch
in the brine circuit.
Domestic hot water temperatures during heat
pump operation below 35 °C
Incorrect direction of rotation
Phase failure
Start-up of compressor is too long
Undervoltage
Operating current of compressor is too high
Overtemperature of soft starter
Incorrect network frequency
Coding does not correspond to the heat pump
type
The heat source is providing little energy
The flow temperature in the heating operating
mode is below 7 °C
The heat pump was switched off by the high
pressure sensor or the pressure switch.
Temperature difference between flow and return
is too big (>12K) or negative.
The heat pump has been switched off because
there is no flow in the primary or secondary
circuit. The flow rate switch must be activated in
the "Settings - Heat pump" menu.
Measure
Check the brine pressure
Primary pump motor protection 
and/or fan
Check setting and/or function
 Domestic hot water circulating
pump flow is insufficient
 Heating check valve
defective
 Check domestic hot water
sensors
 Check rotary field
 Check supply voltage
 Inform after-sales service
The type of heat pump recognised
can be read in the operating data
 Clean the dirt trap filter
 Purge the heat source system
 Check brine / water flow
Inform after-sales service

 Evaporator is iced up or the
system temperatures are too
low (return <18 °C).
 Raise heating water
temperature
 Set heating curve lower
 Increase heating water flow
rate
 Check overflow valve
 Check heating water flow rate
Check overflow valve and

pump size
 Flow and return mixed up
 Inform after-sales service
 Insufficient water flow in the
well or brine circuit
 Insufficient water flow in the
secondary circuit
 Incorrect flow direction
EN-31
9.2
is