Operating Instructions and Installation Instructions

LR, LRK, LR-NT, LRK-NT 21 - 32

We reserve the right to make changes to dimensions and construction 41 edition 30.10.2007

8.3. First steps to take in case of failure

In the event of system operational failure, perform the checks in the table below. Also check the governor set-up.

If the failure cannot be eliminated, call a reliable engineer or your support service.

Problem Possible cause Solution

Burner not functioning No power Check fuse, switch on main or safety

switch. Connect supply and burner plug

Burner LED is on Press burner reset button

No oil

Gas pressure insufficient

Add oil

Call the gas board

Overheat temperature LED is on.

Safety thermostat has come into

operation

Fix the cause, wait until temperature has

dropped below overheat setpoint then

reset the safety thermostat by pushing

the pin

External default LED is on. Fix the cause

Heating elements fail to heat up Incorrect operation type setting on

governor

Set up type of operation and heating

programme

Circulation pump blocked Remove locking screw, turn shaft until

no more resistance is left

Water level or system pressure Top up and ventilate

Shut-off elements on supply and

return lines closed

Open them