Komatsu D475A-5E0 Operation & Maintenance Manual page 133

EXPLANATION OF COMPONENTS
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
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
Disconnection in coolant temperature
E15
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
When more than one failure is detected, press the "
the failures in turn.
After completing the troubleshooting, press OFF switch (1) again to return to the normal display.
If any problem is detected by the self-diagnostic function, contact your Komatsu distributor perform inspection and
repair.
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Failure mode
∨ ∧
" or " " portion of temperature setting switch (3) to display
OPERATION