Takeuchi TB 250 - Compressor Clutch Does Not Engage

5-58
5
AIR CONDITIONER
TROUBLESHOOTING
B. Compressor clutch does not engage
Note:
1. After completion of repair work, make sure to reinstall the connectors removed for inspection.
2. Checking the items marked with * is not possible unless you have added refrigerant to the system and the ambient
temperature is at least 2°C.
Turn off the starter switch and remove Connector (13)
from the compressor
Turn on the starter switch, set the fan switch to 1, 2 or 3,
and set the temperature control dial to COOL
※
Measur
e the voltage between the female bullet con-
nector
and ground connected to the compressor. Is it
10-15V?
YES
C
o m p r e s s o r
clutch is faulty
Repair or r
eplace the compressor
NO
※
T
urn off the starter switch and remove Connector (12).
Check the pressure switch of the receiver-dryer for con-
tinuity. Is ther
e continuity?
NO
Pr
essure switch is
faulty
Replace the r
eceiver-dryer
YES
Is the compr
essor normal? NO Relay
or relay cir-
cuit is faulty
Replace the r
elay
YES
Is
the voltage “0V” between the blue/red and ground of
Connector (4)?
NO Blower
switch is
faulty
Replace the blower switch
YES
Is the evaporator sensor normal?
(see
the description for checking the evaporator sen-
sor)
NO
Evaporator
sensor
cord or evaporator
sensor is faulty
Repair
the evaporator sensor cord or
replace the evaporator sensor
YES
Contr
ol amplifier
is faulty
Replace the contr
ol amplifier