Danfoss DHP-A Service Instructions Manual page 25

Service instructions
Problem – Irregular indoor temperature
Cause
1. The heat pump's control comput-
er is not set/adjusted to the custom-
er's requirements/wishes.
2. Incorrectly positioned/installed
sensors.
Danfoss Heating Solutions
Domestic heat pumps
Troubleshooting
Check the ROOM and CURVE, MIN, MAX CURVE5,
CURVE0, CURVE-5 and HEAT STOP settings.
Check that outdoor sensors and any room sensors
are installed according to the instructions and that
they are calibrated.
Remedy
Adjust incorrect values in the heat pump's
control computer.
ROOM = Desired indoor temperature
CURVE = Should be set so that the desired
indoor temperature (ROOM) is maintained
regardless of the outdoor temperature.
MIN = Lowest set-point value on the supply
line regardless of the outdoor temperature
(on the condition that heat stop does not
apply).
MAX = Highest set-point value on the sup-
ply line regardless of the outdoor tempera-
ture.
CURVE5,0,-5 =The supply temperature can
be adjusted up or down 5°C at these out-
door temperatures.
HEAT STOP = Stops all production of heat
when the outdoor temperature is the same
as or greater than the set value. To exit heat
stop the outdoor temperature must drop to
3°C below the set value.
▪ Check that the room sensor is posi-
tioned in a suitable place that is repre-
sentative of the building and calibrate
it if necessary. Avoid placing near ex-
ternal doors, windows and heat sour-
ces.
▪ Install the outdoor sensor according to
the instructions and calibrate it, if nec-
essary.
VIGFI102
25