Desa MASTER BG 100 Manuel De L'utilisateur page 10

HOT AIR GENERATOR
10
GB
TROUBLESHOOTING
Problem
The heater won't start
Thermostat L cuts in
Thermal relay RM cuts in (warning
light (9) lights up)
The burner starts up, the fl ame
doesn't light up and the restart
light comes on
The fan doesn't start up or starts
up late.
The fan vibrates or makes
unusual noise
Not enough heat
Cause
1.Faulty electrical supply
2.Wrong positioning of main switch
3.Wrong setting of room thermostat
4.Safety device (burner, thermostat L) not
restarted after repairs
1.The combustion chamber has overheated
1. Fan current absorption is excessive
1.Burner not working correctly
1.No electrical power
2.F thermostat out of order
3.Winding of motor burnt or interrupted
4.Condenser burnt
5.Motor bearings blocked
1. Extraneous material on fan blades
2. Not enough air circulation
3. Drive belt loose or not aligned
1.Wrong burner
Remedy
1. Check function and positioning of main switch
1. Check power cord
1. Check electrical connections
1. Check fuses
2. Put main switch in correct position
3. Check setting of room thermostat
3. Check function of room thermo-stat
4. Press the appropriate restart button
1. Check fuel fl ow
1. Check position registers, draw-holes, etc.
1. Remove extraneous material from air ducts and
ventilation grills
1. Increase air fl ow adjustining transmission
1. Between motor and fan
1. Adjust transmission between motor and fan
1. Press the restart button to turn on the heater. If
the same problem arises again call an Authorized
Service Technician
1. Check fuses
1. Check electrical connections
2. Check the thermostat, set it and replace it if
necessary
3. Replace the fan motor
4. Replace the condenser
5. Replace the bearings
1. Remove extraneous material
2. Remove obstacles to air circulation
3. Adjust drive belt tension
1. Call an Authorized Service Technician