OPERATOR'S STATION Diagnostic Function Functions of each sensor for the A/C and the air vent damp- er can be diagnosed using this function. Press both “ 6 9 ” marks on temperature control switch (9) for longer than 3 seconds at the same time with the fan turned OFF (no air flow) to display the operating conditions of the sensors and dampers as shown below. ” and “ M178-00-017 Displays on LC D and Trouble Mode NOTE: In case more than one fault is detected, press either “ or “ ” mark on the temperature control switch button to change the fault code displayed on the LCD in order. Press fan OFF-switch (6) to complete the diagnosing function.
If any trouble has been found through operating the diagnos- tic function, contact your nearest Hitachi dealer for repair. 1-70 Displays on LCD Trouble Mode E— No fault E11 Broken re-circulation air sensor E12 Short re-circuited circulation air sensor E13 Broken fresh air sensor E14 Short circuited fresh air sensor E15 Broken coolant temperature sensor E16 Short circuited coolant temperature sensor E18 Short circuited insolation sensor E21 Broken air vent sensor E22 Short circuited air vent sensor E43 Abnormal air vent damper E44 Abnormal air mix damper E45 Abnormal both re-circulation and fresh air damper E51 Abnormal refrigerant pressure