Instructions for the user
10.PROBLEMS AND CAUSES
Each of the following cases is caused by an abnormal operation of the appliance and should be dealt with by a authorised persons: please contact your local dealer or Service Center in case you detect any of these malfunctioning.
| PROBLEM |
| CAUSE | WHAT TO DO |
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The flame is very long with bright yellow tips.
Black deposits on the bottom of the pans.
The flame is very short and noisy. The flame moves away from the burner ports.
The flame extinguishes when the burner knob is set to the low flame position.
Defect of comburent air or incorrect injectors. Burner dirty or flame ports obstructed.
Excess of comburent air.
Incorrect adjustment of the minimum heat input or excess of comburent air.
Clean the burner.
Call Service Center if the problem remains.
Call Service Center.
Call Service Center.
The valve knob is hard to rotate.
Gas valve worn out or Call Service Center. needs lubrification. 
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