EVERY 500 HOURS MAINTENANCE 4

Other Functions

Self-diagnostic Function It is possible to perform troubleshooting of various sensors and equipment used on the air conditioner. 1. Press OFF switch (1). The temperature setting and air flow display on the liquid crystal display portion go out and operation stops. 2. 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.

<Monitor display and failure mode>

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 coolant temperature sensor E16 Short circuit in coolant temperature sensor E18 Short circuit in sunlight sensor E21 Disconnection in vent sensor E22 Short circuit in vent sensor E43 Problem in vent damper E44 Problem in air mix damper E45 Problem in RECIRC/FRESH air damper E51 Problem in refrigerant pressure

Function to Switch Set Temperature Display Between Fahrenheit and Celsius It is possible to switch the set temperature display between °F and °C. If the "∨" and "∧" portions of temperature setting switch (3) are pressed at the same time for more than 5 seconds while the fan is running, the temperature display will switch between °F and °C. (Note that the unit is not displayed.)

Liquid crystal display range °C 18.0 to 32.0 °F 63 to 91