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LMV5000.EN202001V6
Check:
•
If all three phases (L1, L2 and L3) still have normal loads.
•
If all fuses are intact Replace the fuses when required (we recommend
replacing all three fuses at the same time).
•
Write down which overload relay triggers a lockout, if after resetting the
motor makes a sound similar to an animal growl and doesn’t run smoothly
one phase may still not be working properly.
Air pressure too low
The air pressure is monitored using air pressure switches (pos. LD2 low and LD2
high) mounted on the burner. The pressure is checked 30 seconds after the air fan is
started.
Possible causes:
•
The air inlet of the air fan is blocked (plastic bag).
•
The air fan is very dirty.
•
The air valves are very dirty.
•
The flexible measuring hose to the pressure switch is broken or blocked.
•
The overload relay is locked out (see previous item).
Check:
•
The air fan inlet.
Maximum temperature and/or pressure
The boiler is protected against high temperatures and/or pressure. A maximum
thermostat or maximum pressostat device forms the basis for the protection. When
the temperature or pressure exceeds the maximum value setting of the device the
burner locks out. The maximum thermostat supplied by Zantingh is locked
mechanically and has to be reset both on the thermostat itself and on the burner
control panel.
Possible causes:
•
Configured setpoint may be too high.
•
Too little water and/or air bubbles in the boiler, fill it up and bleed it.
Low water
The water level in the boiler is monitored to protect the boiler against serious damage
caused by overheating when the water level in the boiler is too low.
This safety device is supplied as one of two options:
•
One or two electrodes mounted in the boiler.
•
Mechanical float switch.
Possible causes:
•
Water level too low (for example due to a system leak).
•
Feed water pump malfunction.
•
Expansion system low pressure.
Summary of Contents for RKB
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