Tadano TT-800XXL1, Service Manual

Page: 192 / 267

39
K-2 K-2 K-2
Air Conditioner
39
W701-0160E
12.2 Compressor diagnosis chart (1/2)
Cool
in
g f
ail
ur
e
Compressor does not work. Clutch terminal voltage is normal. 12V or 24V
Clutch terminal voltage low.
Clutch terminal voltage none.
Both
c
om
pr
es
so
r and blo
w
er
m
otor
w
or
k.
Bubble does not disappear even if charging gas.
Cloudiness does not disappear for new refrigerant.
Oil or gas leakage from parts other than compressor
or piping joint. Check with gas detector.
Gas or oil leakage from compressor.
(No leakage found other than from compressor.)
Check with gas detector.
Both high and low pressure are low.
High-press. is slightly low, and low-press. is high.
Gas has not been charged for more than
one season.
Gas will be discharged within 1-2 months.
Check with gas detector.
High-pressure is high.
Will not get cold when continuously driving at high speed.
Air volume of blower motor is few.
App
ear
anc
e
dir
t.
Clutch seizure.
Amateur and rotor clearance failure. (airgap failure)
Core disconnection or short-circuit.
Shaft does not rotate. (internal lock)
Compressor cylinder does not become hot.
Cloudiness does not
Cloudiness does not disappear for new refrigerant.
Cloudin
ess
Mechanical seal, gasket, and charge valve.
Leakage from oil plugs.
Leakage from front housing or cylinder block joint.
Repair
Leak from hose etc. naturally.
Repair
Charge gas.
Repair
Repair
Repair
Repair
one season.
(No abnormality.)
Check oil.
Adjust oil amount.
Repair
Repair
Valve damage or scroll damage.
(Refer to Note 3 on next page.)
Gasket blowout. (Refer to Note 3 on next page.)
Too much oil.
Clutch bearing failure because of belt overstretch.
Shaft does not rotate.
There is caught even if shaft rotates.
Eas
y to
o
ver
heat
.
Compressor does not work.
Phenomena other than compressor. Refer to "Car air conditioner system diagnosis table II".
Phenomenon and diagnosis result Cause Remedy
(Refer to Note 1 and 2 on next page.)
Gas is not decreased after two years
or more.