Maintenance; Troubleshooting - Dimplex LAK 3IMR Installation And Operating Instruction

LAK 3IMR - LAK 14ITR

8.2 Maintenance

To maintain an optimal output on the LAK split heat pump, regu-
lar checks and maintenance work should be carried out on the
unit.
It is advisable to work through the following checklist at least
once a year.
Pos. Category
1
Water
2
4 Current

8.3 Troubleshooting

If the LAK split heat pump is experiencing problems during oper-
ation or is not working at all, check the following points.
8.3.1 Removing faults during operation
Pos. Fault
Insufficient heating
1
or cooling.
The outdoor unit is
not working, despite correct
2 power supply
(information on the
control panel).
Noises from the
3
water pump
Water is drained off
4 through the
drain hose.
Domestic water is not
5
heated
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Before opening the unit, ensure that all electric circuits are isolated from
the power supply.
Components

In normal operation, the pressure gauge should show a pressure of 2.0 to 2.5
Water pressure
bar.

If the pressure is under 0.3 bar, water should be added.

Close the relevant isolating valves and remove the dirt trap. Clean the dirt trap
Dirt trap
(water filter) 
Water may flow out when dismantling the dirt trap.

Cable connections of the Check the terminal panel for loose or faulty connections.
terminal panel
Before opening the unit, ensure that all electric circuits are isolated from
the power supply.
Cause

Check the setting of the heating curve on the heat pump manager
Incorrect setting of the
target temperature.

Insufficient Check the pressure gauge and add water until the pressure gauge shows a
water filling.
pressure of 2.0 to 2.5 bar.

Check whether the dirt trap is heavily soiled. If so, the dirt trap must be
cleaned.
Water flow is low.

Check whether the pressure indicator shows a pressure of at least 0.3 bar.

Check whether the water piping is blocked by soiling or limescale deposits.

If there is a temperature above 55 °C on the water inlet, the outdoor unit is
Temperature on the
water inlet is too high.
switched off to protect the system.

Temperature on the
If there is a temperature below 5 °C on the water inlet, the outdoor unit is
water inlet is too
switched off to protect the system. Wait until the temperature on the water inlet
low.
has been increased by the indoor unit.

Open the protective cap of the purging and add water until the pressure gauge
shows a pressure of 2.0 to 2.5 bar.
Purging has not been

If no water comes out after pressing on the tip (on the top side of the opening),
completed.
the purging process is not yet complete. If the system has been purged opti-
mally, water sprays out like a fountain when pressing on the tip.

Check whether the pressure indicator shows a pressure of at least 0.3 bar.
Water pressure is low.

Check whether the equalising tank and pressure gauge are working correctly.

Open the lever of the safety valve and drain off more water until the pressure
Too much water has been
added.
gauge shows a pressure of 2.0 to 2.5 bar.

Equalising tank is dam- Replace the equalising tank.
aged.
Thermal circuit breaker 
Open the front cover of the indoor component and press the Reset button
of the flange heater or
pipe heater has been trig-
gered

Check the settings on the heat pump manager on the indoor unit.
Domestic water heating
was deactivated.
452162.66.09 · FD 9703
ATTENTION!
Test point
ATTENTION!
Solution
English
EN-15