Testing Sunlight Sensor - Komatsu PC200-8M0 Shop Manual

100 Air conditioner

Testing sunlight sensor

Testing sunlight sensor
k
Park the machine on a level surface, lower
the work equipment to the ground so that it is
stable, and stop the engine.
k
Turn the battery disconnect switch to the
"OFF" position and pull out the key.
a Note connector numbers and installed positions
when disconnecting wiring and hoses.
Testing
q If [879DKZ] "Sunlight sensor disconnection or
short circuit" is displayed by the self-diagnosis
("Air-conditioning System" screen on the ma-
chine monitor), test sunlight sensor connector
P31.
To reset the self-diagnosis system (detection of
q
abnormality), the starting switch must be turned
OFF.
a If the sunlight sensor is measured with the resis-
tance range of the tester, the sunlight sensor
may be destroyed, so do not measure with the
resistance range of the tester.
1. Remove the machine monitor cover. For details,
see "Testing air leakage (duct)", Steps 6 and 7.
2. Check connector P31 at the rear of the sunlight
sensor. (Check whether the connector is coming
off.)
3. Disconnect connector P31, remove the sunlight
sensor, and measure the voltage between the
terminals on the sensor side using a circuit tester
in voltage range.
Approximate voltage of sunlight sensor unit
q
0.55 V: Direct sunlight
0.45 V: Cloudy
0.4 V: Indoors
PC200, 200LC, 220, 220LC-8M0
SEN06151-00
35
80-100