Tadano TT-800XXL1, Service Manual

Page: 186 / 267

K-2
K-2
Air Conditioner
33 W701-0160E
Trouble
phenomena
other than A/C
system
Disorder section
Phenomenon explanation to
consider other factors
Diagnosis result
(phenomenon of principal
cause)
Possible cause
Measures (specific part name
and repair method)
Sound is generated when
compressor starts. -------------------------------- Vibration or slip by belt
looseness (continuous sound
'Quuuu!'). Screw looseness
failure. Tension belt, replace, or
re-tighten screw.
Sound is generated from
radiator fan and condenser
fan. -------------------------------- Motor-fan shaft shaking, bearing
breakdown, fan damage, or
fan/shroud come in contact. Repair or replace.
Noise sounds. Engine room side
Sound is generated from
parts installation section
(shaking when touching). -------------------------------- Dropout of fixed bolt, looseness,
or damage of brackets.
Tighten appropriately, or
replace brackets.
Blocking in condenser fin. -------------------------------- Wash condenser fin.
Revolution of condenser fan
is slow. Condenser fan failure. Replace condenser fan motor.
Vehicle
overheats
easily. Condenser unit Condenser is set in front of
radiator.
High-pressure is high. (High
pressure is high at idling.) Same cause as refrigeration
circuit system-I. (Hot air flows in
condenser.) Same measures as
refrigeration circuit system-I
Blocking in radiator fin. Wash or replace radiator fin.
-------------------------------- Dirt inside radiator.
Radiator filler cap failure.
Water pump failure.
Blocking in water thermo. Check and replace.
Radiator coolant is
shortage. -------------------------------- Check leakage and replenish,
or replace radiator.
Fan belt and water pump
belt are slippage. -------------------------------- Adjust belt tension or replace
belts.
Vehicle
overheats
easily. Vehicle side Trouble around radiator.
Revolution of radiator
cooling fan is slow, or
slippage. Radiator fan failure. Replace
Engine
(revolutions) is
overrun. Vehicle side Engine revolution adjusting
device -------------------------------- Raising idling speed too much or
overheat. Adjust idling speed to a
regulated value, and adjust
engine. Take measures for
overheat.
Smells
unpleasant. Cooling unit -------------------------------- -------------------------------- Smoke of Tabaco, dust, and
mold, etc. are adhered or
deposited to the evaporator fin.
Wash evaporator.