7
E
. 0
4.
20
00
•
G
. 2
6.
03
.1
8
Function
•
Remove the sealing plug 4.
• Screw in the pressure gauge and adjust the pump
pressure with the regulating screw 6.
Key to Danfoss pump:
1
= Flow
2
= Return
3
= Pressure tube connection
4
= Pressure measuring connection
5
= Vacuum measuring connection
6
= Pressure adjustment
8
= Magnetic valve
Function
Control unit LMO
Testing the control unit for proper functioning
Danger of fatal injury from electric shocks!
Disconnect electrical cable from power supply before
carrying out any work on live parts! Troubleshooting
may only be carried out by authorised and trained per-
sonnel! Unlocking may only be carried out by an autho-
rised specialist.
When commissioning the plant or when doing maintenance work, make the following safety
checks:
Burner startup with flame detector darkened:
•
Lockout at the end of «TSA»
Burner startup with flame detector exposed to extraneous light:
•
Lockout after no more than 40 seconds.
Burner operation with simulated loss of flame:
•
For that purpose, darken the flame detector during operation and maintain that state
Repetition followed by lockout at the end of «TSA»
Safety and switching functions
If a flame failure occurs during operation, the fuel feed shuts off immediately and the system tries a restart,
with pre-aeration and retarded ignition. If no flame results, the control box shows a fault after the safety
time. The system restarts automatically after an interruption in the power supply. The control box shows a
fault if the photo-electric cell detects a light source during the pre-aeration time, after the safety time.
Diagnostics of the cause of fault
After lockout, the red fault signal lamp remains steady on. In that condition, the visual diagnostics of the
cause of fault according to the error code table can be activated by pressing the lockout reset button for
more than 3 seconds. Pressing the reset button again for at least 3 seconds, the interface diagnostics will
be activated. Interface diagnostics works only if the AGK20… lockout reset button extension is not fitted.
If, by accident, interface diagnostics has been activated, in which case the slightly red light of the signal
lamp flickers, it can be deactivated by pressing again the lockout reset button for at least 3 seconds. The
instant of switching over is indicated by a yellow light pulse.
Danfoss
:
1
2
3
6
8
4
5
