Installation guide

60
VMBME102
14.9 Operational problem – Outdoor unit
Problem – Noise/loud noise
Cause Troubleshooting Remedy
1. Positioning the outdoor unit. Determine whether the outdoor unit can be
moved to a more suitable location.
When positioning the outdoor unit, its
direction does not affect its performance.
The outdoor unit does not need to be posi-
tioned as close to the heat pump as neces-
sary, it can be positioned as far as 30 ”pipe
metres” way.
2. Connection/wall lead-ins. Check that the unit is installed according to
the instructions.
Is the outdoor unit secured to the wall?
Rigid mountings can generate noise from
the outdoor section via walls in the house.
Problem – Defrosting problems
Cause Troubleshooting Remedy
1. 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
calibrate, if necessary. Alternatively, the
outdoor sensor can be located behind the
outdoor unit 20 cm out from the rear side of
the outdoor unit.
2. Brine temperature in/out. Measurement check the temperatures with
a thermometer.
If necessary, calibrate BRINE IN and BRINE
OUT in the heat pump’s control computer.
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 outdoor unit because the melt-
ed water has no where to run?
Drain the ground under and around the
outdoor section
or
Install a drip tray with a drainpipe routed
to an indoor drain or gully. NOTE! A heat-
ing cable may have to be installed 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 defrosted, large amounts
(20-40 L/day) 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 drip tray with a drainpipe routed
to an indoor drain or gully. NOTE! A heat-
ing cable may have to be installed in the
drainpipe.