3.5.7 Heat pump
Problem – Noise/loud noise
Cause Troubleshooting Remedy
1. Positioning the heat
pump.
Determine whether the heat pump can be moved to a
more suitable location.
Move the heat pump if possible.
2. Connection/wall lead-ins. Check that the unit is installed according to the instruc-
tions.
Rigid mountings can generate noise from
the heat pump via walls in the house.
Problem – Defrosting problems
Cause Troubleshooting Remedy
Location/calibration of the
outdoor sensor.
Check that the outdoor sensor is installed according to the
installation instructions and that it is correctly calibrated.
Install according to the instructions and cal-
ibrate, if necessary.
Defrost sensor calibration Check that the defrost sensor is installed according to the
installation instructions and that it is correctly calibrated.
Calibrate if necessary.
Problem – Build-up of ice under and around the outdoor unit
Cause
Troubleshooting Remedy
Insufficient drainage. Does a lot of ice accumulate under and around the out-
door unit because the melted water has nowhere to run?
Drain the ground under and around the
outdoor section or install a drainpipe rout-
ed to an indoor drain or gully. NOTE! Install
a heating cable in the drainpipe.
Problem – Water run-off by the outdoor unit, risk of moisture problems in house foundations
Cause
Troubleshooting Remedy
Insufficient drainage. During some periods when the outdoor unit is being de-
frosted, large amounts of water can run off.
Drain the ground under and around the
outdoor unit so that it can cope with the
extra amount of water produced because
of defrosting or install a drainpipe routed to
an indoor drain or gully. NOTE! Install a
heating cable in the drainpipe.
Service Instructions DHP-AQ
Danfoss Heating Solutions VMGFJ202
33
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