DeDietrich ALEZIO AWHP MIV-II, User Manual

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6.2 Incidents and solutions
Problem Probable causes Solution
The radiators are cold.
The heating temperature setting
is too low.
4
Increase the value of parameter
d
or, if a room thermostat
is connected, increase the temperature.
¼ See chapter: "Modifying the set room
temperature
d
H ", page 16.
The heating mode is
deactivated.
4
Activate the heating mode.
¼ See chapter: "Changing the operating mode",
page 17.
The radiator valves are closed.
4
Open the valves on all radiators connected to the heating
system.
The heat pump is not operating.
4
Check that the heat pump is switched on.
4
Check the fuses and switches.
The water pressure is too low (<
1 bar).
4
Top up the installation with water.
¼ See chapter: "Top up the installation with
water", page 20.
There is no domestic hot
water.
The DHW temperature setting is
too low.
4
Increase the value of parameter
r
.
¼ See chapter: "Modifying the domestic hot
water temperature H
r
", page 16.
The domestic hot water mode is
deactivated.
4
Activate the DHW mode.
¼ See chapter: "Changing the operating mode",
page 17.
The energy-saving shower head
is restricting the water flow.
4
Clean the shower head; replace if necessary.
The heat pump is not operating.
4
Check that the heat pump is switched on.
4
Check the fuses and switches.
The water pressure is too low (<
1 bar).
4
Top up the installation with water.
¼ See chapter: "Top up the installation with
water", page 20.
Significant variations in
domestic hot water
temperature
Insufficient water supply
4
Check the water pressure in the installation.
4
Open the valve.
The heat pump is not working.
The heating temperature setting
is too low.
4
Increase the value of parameter
d
or, if a room thermostat
is connected, increase the temperature.
¼ See chapter: "Modifying the set room
temperature
d
H ", page 16
The heat pump is not operating.
4
Check that the heat pump is switched on.
4
Check the fuses and switches.
The water pressure is too low (<
1 bar).
4
Top up the installation with water.
¼ See chapter: "Top up the installation with
water", page 20.
An error code appears on the
display.
4
Correct the error if possible.
¼ See chapter: "Error messages", page 22.
The water pressure is too
low (< 1 bar).
Not enough water in the
installation.
4
Top up the installation with water.
¼ See chapter: "Top up the installation with
water", page 20.
Water leak. Contact the fitter.
6. Troubleshooting AWHP MIV-II
23 03/07/2012 - 300023321-001-01