Troubleshooting - Danfoss DHP-R Eco Installation Instructions Manual

10

Troubleshooting

Alarm
In the event of an error message try restarting the installation using the reset button on the control panel.
If restarting the heat pump does not help try rectifying the problem using the table below.
Message Meaning
LOW PRESS
Low pressure
ERROR error - The com-
pressor stops
and there is no
hot water pro-
duction.
HIGH PRESS High pressure
ERROR error - The com-
pressor stops
and there is no
hot water pro-
duction.
MOTOR P
Motor protec-
ERROR tion error - (Over
current relay
compressor or
brine pump).
The compressor
stops and there
is no hot water
production.
Other alarms;
See separate manual for the control system.
16
Cause
Not enough anti-freeze in the
coolant system. Air in the brine
system. Blocked filter in the
brine system.
Coolant pump has stopped or
is running at slow speed.
Ice build up in the coolant
system.
Underfilled cooling system or
any leaks.
Blocked or filled drying filter in
the cooling circuit.
Insufficiently opened radiator/
floor loop thermostats. Air in
the heating system. Blocked
strainer in the heating system,
located in the heat pump
return.
Overfilled refrigerant circuit.
Heat transfer fluid pump has
stopped or is running at slow
speed.
Phase drop or blown fuse.
Poorly tightened electrical
connections.
Too low network voltage.
VMIFI102
Remedy
Fill the refrigerant with the correct
percentage of anti-freeze and bleed
using the safety valve on the volume
container. Check if the strainer needs
cleaning.
Take temperature difference
readings between incoming and
outgoing coolant. The difference
should be between approximately
3-5°C.
Measure the amount of anti-freeze
in %, wait until the ice melts, which
affects the low pressure switch not
contacting the wiring.
Drain and leak trace as well as filling
new refrigerant. No refilling of drai-
ned medium.
Measure the temperature difference
of the filter – max 2°C.
Open radiator / floor loop thermo-
stats. Fill and bleed the heating
system. Measure delta over the
heat pump supply and return lines.
Temperature difference.
Draining the refrigerant circuit and
refilling with new refrigerant, accor-
ding to the instructions.
Check the heart transfer fluid pump.
Check the fuses and cable terminals
(power supply to the compressor or
brine pump).
Check the electrical connections.
Measure the voltage to the heat
pump's electrical connection.