OPERATION DETAILED CONTROLS AND GAUGES Other Functions 3 Self-diagnostic Function It is possible to perform troubleshooting of various sensors and equipment used on the air conditioner. 1. Turn the starting switch key to the ON (B) position. 2. Press OFF switch (1). The temperature setting and air flow display on the liquid crystal display portion go out and operation stops. 3. If the “ “ and “ “ parts of temperature setting switch (3) are kept pressed at the same time for at least 3 seconds, the troubleshooting mode is displayed on the liquid crystal display portion.
q When more than one failure is detected, press the “ “ portion of temperature setting switch (3) to dis- play the failures in turn. q After completing the troubleshooting, press OFF switch (1) again to return to the normal display. If any abnormality is detected by the self-diagnostic function, ask your Komatsu distributor to carry out inspection and repair.
3-47 Display Failure mode E-- No failure E11 Disconnection in recirculated air sensor E12 Short circuit in recirculated air sensor E13 Disconnection in fresh air sensor E14 Short circuit in fresh air sensor E15 Disconnection in water temperature sensor E16 Short circuit in water temperature sensor E18 Short circuit in sunlight sensor E21 Disconnection in vent sensor E22 Short circuit in vent sensor E43 Abnormality in vent damper E44 Abnormality in air mix damper E45 Abnormality in FRESH/RECIRC air damper E51 Abnormality in refrigerant pressure