Master BV 460E Instruction Manual page 22

ENGLISH
Observed fault
• Heater does not start.
• Thermal relay RM cuts
in (Warning lamp (10)
lights up)
• Thermostat L2 cuts in
(Warning lamp (9)
lights up)
• Burner motor starts but
does not ignite.
• Ventilator does not start
or starts late.
• Noise and vibrations
from ventilators.
• Insufficient heat.
Possible cause
• Faulty electrical supply.
• Wrong positioning of mains switch
• L thermostat cuts in.
• Wrong setting of eventual
room thermostat.
• Fan motor current
absorption excessive
• Excessive combustion
chamber over heating.
• Bad functioning of burner.
• No electrical current.
• F thermostat out of order.
• Motor winding faulty.
• Burned out condenser.
• Blocked motor bearings.
• Dirt or foreign particles
of fan blades.
• Restricted air circulation.
• Wrong burner.
Remedy
• Check function and positioning of mains switch.
• Check mains
• Check electrical connections.
• Check fuses.
• Set on right position.
• See instruction relative to L thermostat.
• Check oil flow.
• Make sure no additional air ducts restrict air flow.
• Remove dirt or foreign particles from air outlet.
grilles, louvres or ducts.
• Check positioning of thermostat and correct.
• Check if thermostat is functioning properly.
• Heater with helicoidal ventilation: remove eventual
debris preventing free flow of air on intake and
outlet. Check length of air ducts, recluce if excessive.
• Heater with centrifugeal ventilator: check setting of
transmission belt as indicated in chapter
"CONNECTION TO HOT AIR DUCTS"
• Always check that current absorption remains below
value indicated on motor manufacturer plate.
• Check as indicated above.
• If fault persists contact our service center.
• Read burner instructions.
• Check fuses.
• Reset thermal relay.
• Check thermostat, set or replace
• Replace fan motor.
• Replace condensor.
• Replace bearings.
• Remove foreign particles.
• See previous instructions.
• Reed burner instructions.
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