Komatsu PW160-7K Series Operation And Maintenance Manual page 143

OPERATION
CHECK, MAINTAIN MACHINE EQUIPPED WITH AIR
CONDITIONER
When carrying out inspection of a machine equipped with an air
conditioner, see the "MAINTENANCE SCHEDULE CHART (242)"
and carry out inspection according to the table.
OTHER FUNCTIONS
SELF-DIAGNOSTIC FUNCTION
It is possible to carry out troubleshooting of the 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 opera-
tion stops.
2. If the "∧" and "∨" parts of temperature setting switch (3) are
kept pressed at the same time for at least 3 seconds, the trou-
bleshooting mode is displayed on the liquid crystal display.
<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 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
When more than one failure is detected, press the "∧" or "∨"
●
portion of temperature setting switch (3) to display the failures
in turn.
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.
CONTROL LEVERS, PEDALS
143