Danfoss DHP-A Service Instructions Manual page 63

Table 43. Problem – Water run-off by the outdoor unit, risk of moisture problems in house foundations
Cause
Insufficient drainage.
Troubleshooting
During some periods when the outdoor
unit is being defrosted, large amounts
(20-40 L/day) of water can run off.
Remedy
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 heating
cable may have to be installed in the
drainpipe.
Service instructions VMGFC302 – 61