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Item Type Emergency actions
F.D FAN Can’t start  Check the power.
 Check the S/W and the rated capacity of each part. (Check the Over
 Check the wiring.
   ⓐ If the △ - Y operation can’t be started, check for damage in the
   magnet coil and check for a cut wire.
   ⓑ Check the wiring for the contact point for self maintenance.
   ⓒ Check the contact point of the timer relay.
 Missing phase or unbalanced phase-to-phase voltages
   ⓐ Run the No Fuse Breaker (NFB) and check for heat discharge.
Stopped operation  Check the safety device.
 Check the heat discharge from the motor.
   ⓐ Check the rated current.
   ⓑ Check the phase-to-phase voltage. (Check for missing phases.)
   ⓒ Over Load Check
 See if abnormal noises are generated.
   ⓐ Check the heat of the bearing. (Check the balance.)
   ⓑ Check for mounting and dismounting of the impeller.
 Check the safety device.
   ⓐ Check whether the pressure is blocked properly.
   ⓑ Check the water level.
   ⓒ Check for actual combustion.
   ⓓ Check the wind pressure S/W.
F.W PUMP No water supply  If there is air inside the pump (remove air, check the underground tank’s
   check valve.)
 Abnormal noises
   ⓐ 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)
 The pump’s discharge pressure is high, but the amount of water supply
   is low.
   ⓐ Check the valve for the water supply line.
   ⓑ Clogging in the water supply pipe (caused by scale)
Automatic device No automatic water supply  Check the operation of the Mc-DONNELL.
 Even if the water level is lowered, the pump does not operate
   ⓐ Check for clogging in the connection pipe and the valve for the
   Mc-DONNELL caused by scale.
   ⓑ Poor mercury contact point
   ⓒ Poor bellows pipe
 Check the power and electrical circuit for the pump.
No proportional control  Check the automatic and manual switch.
 Check the adjusted condition of the pressure proportional controller.
   ⓐ Clogging in the bellows pipe. (Remove rust.)
   ⓑ Check for any cut or open circuit in the electrical wiring.
 Check the electrical condition of the control motor.
 Check the connection of each area.
BURNER Poor ignition  Check 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 for ignition.
   (0.4~0.6 kg f/㎠)
Poor ignition Check whether the flame detector operates normally.
   ⓐ It operates but the solenoid does not fully open. (Check the wiring and
    the coil.)
 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 loose.)
 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