the S/W and the rated capacity of each part. (Check the
ⓐ If the △ - Y operation
can’t be started, check for damage in the
and check for a cut wire.
Check the wiring for the contact point for self maintenance.
ⓒ Check the contact point of the timer
phase or unbalanced phase-to-phase voltages
Run the No Fuse Breaker (NFB) and check for heat discharge.
the safety device.
the heat discharge from the motor.
Check the rated current.
the phase-to-phase voltage. (Check for missing phases.)
ⓒ Over Load Check
if abnormal noises are generated.
Check the heat of the bearing. (Check the balance.)
ⓑ Check for mounting and dismounting
of the impeller.
the safety device.
ⓐ Check whether
the pressure is blocked properly.
Check the water level.
ⓒ Check for
ⓓ Check the wind
||No water supply
there is air inside the pump (remove air, check the underground
ⓐ Impeller worn out (damage)
Cause 1 : Cavitation effects
(Air in the pump, when the temperature is
Cause 2 : Alien substances inside
the pipe (Clean the strainer)
pump’s discharge pressure is high, but the amount of water
ⓐ Check the valve
for the water supply line.
in the water supply pipe (caused by scale)
||No automatic water supply
the operation of the Mc-DONNELL.
Even if the water level is lowered, the pump does not
ⓐ Check for clogging in the connection pipe and the valve
Mc-DONNELL caused by scale.
ⓑ Poor mercury contact point
ⓒ Poor bellows pipe
Check the power and electrical circuit for the pump.
|No proportional control
the automatic and manual switch.
Check the adjusted condition of the pressure proportional
ⓐ Clogging in the bellows pipe. (Remove rust.)
ⓑ Check for any cut or open circuit in the electrical
Check the electrical condition of the control motor.
Check the connection of each area.
the ignition gas and the light oil.
Check the separation of the spark plug. (3~4mm)
ⓐ Check whether the ignition transformer operates normally.
- Check for leakages in the high-voltage wiring.
- Check for any damage in the insulation.
- Remove carbon from the plug. (Clean it thoroughly with
a dry cloth.)
Excessive amount of primary air injection
ⓐ In case of gas, check whether the pressure is enough
(0.4~0.6 kg f/㎠)
whether the flame detector operates normally.
ⓐ It operates but the solenoid does not fully open. (Check
the wiring and
When the solenoid is fully opened
ⓐ No oil (check the oil meter.)
- Check the rotational direction of the burning pump.
- Check the oil in the service tank.
ⓑ Yes, oil comes out.
- The amount of oil is too small. (Check the residue in
the pipe and the
mixture of water. Check the adjustment
of the fluid meter.)
- Too much air (Check whether the secondary damper is
When the oil temperature is too low (B-C Oil : 80℃~90℃)
Flames are dying.
ⓐ Unstable air and oil pressure
ⓑ Inadequate amount of primary air
ⓒ Air inside the pipe