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TROUBLESHOOTING
FAULTS
• The heater fails to start and fan does not start
• The heater fails to start flame and stops while:
M - M DV MODEL
>> fan goes on
A MODEL
>> lamp (8) lights up with steady red light
• The heater does not stop when "STOP"
procedure is followed
• Fan noise or vibrations
If the heater is still not working properly, please contact your nearest dealer or authorized Service Centre.
EN
CAUSES
• No power supply
• Mains switch in wrong position
• Faulty operation of room thermostat (A
model)
•Insufficient gas supply
• Safety thermostat tripped due to
overheating of combustion chamber
• The flame does not light up
• Faulty safety thermostat
• Thermocouple is insufficiently heated
and gas valve closes (M - M DV
models)
• Faulty thermocouple (M - M DV
models
• Ionization electrode does not detect a
flame (A model)
• Control unit tripped due to irregular
burner operation (A model)
• Faulty electronic control unit (A
model)
• Gas solenoid valve does not close
because of debris
• Faulty room thermostat (A model)
• Foreign bodies on fan blades
• Insufficienct air circulation
18
REMEDIES
• Check power specifications
• Check power connections
• Check fuse
• Select correct position
• Check thermostat position
• Check thermostat electrical connection
• Check thermostat operation
• Check if gas bottle is empty
• Check gas supply line and remove any debris inside
• Check pressure regulator and replace if necessary
• Check that the suction and the flow grills are
unobstructed
• Check that the room is well ventilated
• Check that hot air can escape freely
• Check that gas flow and/or pressure are not excessive
• Check that the suction and the flow grills are
unobstructed
• Check ionization electrode positioniing
• Check room thermostat and replace it if necessary
• Repeat starting operation keeping thermal gas valve
button pressed for at least 13 seconds
• Check thermocouple positioning
• Remove thermocouple and clean it
• Check thermocouple and replace it if necessary
• Remove flame sensor and clean or replace it
• Contact Customer Service
• Check the unit and replace it if necessary
• Close main gas stopcock on gas bottle, let the heater
burn remaining gas in gas tube, and contact Customer
Service
• Check room thermostat and replace it if necessary
• Check electric connection of room thermostat
• Remove foreign bodies
• Eliminate all possible obstacles to proper air flow
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