Pratica Chef Express - Page 3

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THERMOCOUPLE TEMP READINGS ............................................................................................................... 44
INFORMATION SCREEN .............................................................................................................................. 44
TEMPERATURE MEASUREMENT / LANGUAGE ................................................................................................. 45
SELECTION .............................................................................................................................................. 45
FREQUENCY INVERTER FAULT LOG ............................................................................................................... 46
MAGNETRON TEST ................................................................................................................................... 47
CONTROL BOARD OVER TEMP COUNT .......................................................................................................... 48
KEYPAD TEST ........................................................................................................................................... 48
MICROWAVE SYSTEM ........................................................................................... 49
THE MICROWAVE SYSTEM ......................................................................................................................... 50
HOW IT WORKS ....................................................................................................................................... 50
MICROWAVE PROTECTION SYSTEM .............................................................................................................. 50
DOOR AND DOOR SWITCHES ...................................................................................................................... 51
DOOR SWITCHES ...................................................................................................................................... 52
DOOR SWITCH ADJUSTMENTS .................................................................................................................... 53
COMPONENTS ......................................................................................................................................... 55
MICROWAVE SEALS AND GASKETS ............................................................................................................... 66
TESTING FOR MICROWAVE LEAKAGE ............................................................................................................ 68
IMPINGEMENT SYSTEM ........................................................................................ 69
BLOWER MOTOR ..................................................................................................................................... 70
TESTING BLOWER MOTOR ......................................................................................................................... 70
FREQUENCY INVERTER (WEG CFW 100) ..................................................................................................... 71
FREQUENCY INVERTER TROUBLESHOOTING .................................................................................................... 72
HIGH LIMIT THERMOSTAT .......................................................................................................................... 75
TESTING HIGH LIMIT THERMOSTAT .............................................................................................................. 75
CONVECTION HEATER ............................................................................................................................... 76
TESTING CONVECTION HEATER ................................................................................................................... 76
IR ELEMENT ............................................................................................................................................ 77
TESTING IR ELEMENT ................................................................................................................................ 77
CC/IR TEMPERATURE SENSORS .................................................................................................................. 78
TESTING TEMPERATURE SENSORS ................................................................................................................ 78
TESTING HEATER CIRCUIT BREAKER ............................................................................................................. 79
CONTROL SYSTEM ................................................................................................. 81
MAIN CONTROL BOARD/DISPLAY ................................................................................................................ 82
TESTING MAIN CONTROL BOARD ................................................................................................................ 83