Troubleshooting - Desa MASTER BV 470 FS Manual Del Proprietário

HOT AIR GENERATOR
8
GB

TROUBLESHOOTING

Problem
Heater does not start
Thermal relay RT cuts in
(Warning lamp (10) lights
up)
Thermostat TS 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.
Insuffi cient heat.
Cause
1.Faulty electrical supply
2.TA thermostat cuts in.
3. Wrong setting of eventual room thermostat.
1.Fan motor current absorption excessive
1.Excessive combustion chamber over heating.
1.Bad functioning of burner.
1.No electrical current.
2.TV thermostat out of order.
3.Motor winding faulty.
4.Burned out condenser.
5.Blocked motor bearings.
1.Dirt or foreign particles of fan blades.
2.Restricted air circulation.
1.Wrong burner.
Remedy
1.Check function and positioning of main switch
1.Check power cord
1.Check electrical connections
1.Check fuses
1.Put main switch in correct position
2.See instruction relative to TA thermostat.
2.Check oil fl ow
2. Make sure no additional air ducts restrict air fl ow.
2. Remove dirt or foreign particles from air outlet.
grilles, louvres or ducts.
3.Check positioning of thermostat and correct.
3.Check if thermostat is functioning properly.
1. Heater with helicoidal ventilation:remove eventual
debris preventing free fl ow of air on intake and
outlet.Check length of air ducts, recluce if exces-
sive.
1. Heater with centrifugal ventilator: check setting
of transmission belt as indicated in chapter "CON-
NECTION TO HOT AIR DUCTS"
1. Always check that current absorption remains be-
low value indicated on motor manufacturer plate.
1.Check as indicated above.
1.If fault persists contact our service center.
1. Read burner instructions.
1.Check fuses.
1.Reset thermal relay.
2.Check thermostat, set or replace
3.Replace fan motor.
4.Replace condensor.
5.Replace bearings.
1.Remove foreign particles.
2.See previous instructions.
1.Reed burner instructions.