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0.5 V, the rectifier is working. A short circuit between ,+* and ,-, means that the transistor module is defective. Transistor module (picture 2) Conducting-state voltage Diode Ug = 0.4 V: if all conducting-state voltages show approx.0.4 V, the transistor module is working. A short circuit between C2-E2, C1-E1 and C1-2 means that the transistor module is defective. If the rectifer and/or the transistor module seem to be defective, separate the power board K016/K031 from cooling plate and verify the rectifier and the transistor module without power. 5.6.2. Rectifier The recitifier is separated from the power board but still fixed on the cooling plate. Dismount according to “Replacement of power board“. • Conducting-state voltage Diode Ug = approx. 0.5 V: if all conducting-state voltages show approx. 0.5 V, the rectifier works. • Short circuit at the different diodes: rectifier is defective. Picture 1 5.6.3 Transistor module The transistor module is separated from the power board but still fixed on the cooling plate. Dismount according to “Replacement of power board“. Conducting-state voltage Diode Uo = approx. 0.4 V: if all conducting-state voltages show approx. 0.4V, the transistor module is working. A short circuit between AC2-E2, C1-E1 and C1-E2 means that the transistor module is defective. If the module is defective, verify diodes D7, D8, D9 and D10 on short circuit (see 9.2/9.3). Replace the power board when you discover a short circuit. Picture 2 6 Maintenance I Service Maintenance work may only be completed by authorized personnel. Before starting any maintenance, the power supply must be disconnected and the appliance must have cooled down. The following maintenance must be completed periodically. The longer and the more frequently the cooker is used, the more often the maintenance will have to be cpmpleted. Every cooker must be checked at least once a year. Fan The good function of the cooker can only be guaranteed if the electronics kept within normal working temperatures. • The air inlet and air outlet slots must not be hindered • The airducts must be free of dirt • The air must circulate unhinderedly through the cooling plate (no hindrance) • The fan is secure • The cooling plates are secure Induction coil Check: • Coil is securely mounted (screws tightened)? • Coil adhesive (secured o.k.)? • Ferrite (secured o.k.)? Generally Check • Ground connection to earth? • Screw connections • Any kind of liquids that have entered the cooker • Dirt in the cooker 7 Trouble Shooting 7.1 Generally ATTENTION Do not open the cooker when it is connected to the power supply. Dangerous voltage inside! The induction cooker may only be opened by authorized personnel. Stop any work if the heating area(vitrocerame) is broken. The induction cooker must be switched off and the power cable must be disconnected. Do not touch any parts inside the cooker. Before replacing a part check the wiring. Pay special attention to the following faults: • Broken cables • Pinched cables • Loose or broken solder joints You must not attempt any repair on the printed boards. 7.2 Error messages m m m IIIP l^ri^ÜnCTOn'^^ ■ on 7 No coil current, Hardware overcurrent on 2 High coil current, Software overcurrent “ *№ on on 3 Temperature cooling plate " on " " 4 Temperature heating area 1) “ on on 5 Potentiometer line break on on 6 Temperature inside on on on 7 Heating area detecting element 2) on on ~ 12 Power reduction cooling plate temperature 3) on on ~ on 13 Power reduction heating area temperature 3) 1) The induction unit can only be started again by turning the knob to “off" to reset. 2) The induction unit will continue to work but the temperature of the cooking platform will not be controlled anymore. 3) The induction unit continues working at reduced power levels. “Code” means the number of flashes of the indicator lamp. Order of error message: The indicator lamp flashes at an interval of 0,6 sec. The number of the following short flashes has to be counted and informs you about the kind of error corresponding to the above mentioned code system. Continued from page 16 I I MPIP Fuse burns out at starting Cooker is Incorrectly connectea ■ Short circuit at power board Check the power board Ap1 Short circuit in wiring Check the wiring No heating (indicator lamp does not flash) Potentiometer on “OFF" position Turn the potentiometer on “ON" Main switch defective Check power on binder 5 and 6 (one phase) or 4,5, and 6 (three phase) on power board No current supply Check the fuses, Check connection Power supply not satisfactory Check power supply Fuses „Logic supply* on power print defective Check and replace fuses S1 and S2 (Typ 1AT) No heating Pan too small (Diameter of pan bottom less than 12 cm) Use appropriate pan Pan is not placed in the middle of the heating area (pan can not be detected) Push the pan in the middle of the heating area ...

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