![background image](http://html2.mh-extra.com/html/takeuchi/tb-250/tb-250_workshop-manual_3331249348.webp)
5-57
5
AIR CONDITIONER
TROUBLESHOOTING
AIR CONDITIONER
“4. Disassembly and assembly, Air conditioner”
A The outlets temperature cannot be changed
Note:
1. After completion of repair work, make sure to reinstall the connectors removed for inspection.
2. Check if there is warm water at the IN side of the water valve.
3. By referring to the wiring diagram, check for continuity of the lines between the air conditioner harness connectors
beforehand.
The attenuator is
faulty
Replace
Check the temperature controlling operation
YES
Turn on the starter switch and then the air conditioner
switch (10R20R3). Turn the attenuator and check if the
voltage changes from 0 to 5 V between the following
wires of Connector (2).
• The green/black and green/white
• The green/black and yellow/black
(See the description about the temperature adjusting
switch below.)
NO
Is the voltage be-
tween the green/
black and yellow/
white wires 5 V?
NO
Replace the amplifier
YES
YES
Does the water valve rod in the control box move with
the output of the temperature control dial?
YES
Water valve is
faulty
Remove Connectors (1) and (2).
Check for continuity of the wires (yel-
low/white, yellow/black, green/white,
green/black of Connector (1)) and Con-
nector (2)
NO
NO
Repair the wire break/disconnection
Check if something is interfering with the link of the wa-
ter valve assembly or the operation of the water valve
motor actuator. Is there anything interfering?
YES
Remove the interfering thing or repair
or replace faulty parts
NO
Turn off the starter switch and remove Connectors (1),
(11), (12). Check for continuity in the wires (light green,
blue, yellow, green/yellow, red/white, white) of Connec-
tors (1) and (11). Are they electrically continuous?
NO
Repair the wire break/disconnection
YES
Check for mutual short-circuiting in the six wires con-
necting the motor actuator and the lamp. Is there a
short circuit?
YES
After repairing, perform a test opera-
tion. If the problem still exists, replace
the control amplifier (it could be dam-
aged by short-circuiting)
NO
Replace with a water valve motor actuator for testing,
and connect the connectors removed. Perform a test
operation. Is the operation normal?
NO
Control amplifier
is faulty
Replace the control amplifier
YES
Water valve motor
actuator is faulty
Replace the water valve motor actua-
tor
Содержание TB 250
Страница 1: ......
Страница 3: ...1 1 SAFETY 1 Safety alert symbol 1 2 Safety precautions 1 3 Cautions when working 1 9...
Страница 36: ...2 24 2 TIGHTENING TORQUE SERVICE DATA...
Страница 37: ...2 25 2 SERVICE DATA HYDRAULIC CIRCUIT DIAGRAM HYDRAULIC CIRCUIT DIAGRAM Equipped with options 1 2...
Страница 38: ...2 26 2 HYDRAULIC CIRCUIT DIAGRAM SERVICE DATA Equipped with options 2 2...
Страница 39: ...2 27 2 HYDRAULIC CIRCUIT DIAGRAM SERVICE DATA Equipped with angle blade and blade oat 1 2...
Страница 40: ...2 28 2 HYDRAULIC CIRCUIT DIAGRAM SERVICE DATA Equipped with angle blade and blade oat 2 2...
Страница 41: ...2 29 2 HYDRAULIC CIRCUIT DIAGRAM SERVICE DATA Equipped with high ow option 1 2...
Страница 42: ...2 30 2 HYDRAULIC CIRCUIT DIAGRAM SERVICE DATA Equipped with high ow option 2 2...
Страница 43: ...2 31 2 HYDRAULIC CIRCUIT DIAGRAM SERVICE DATA Equipped with high ow angle blade blade oat option 1 2...
Страница 44: ...2 32 2 HYDRAULIC CIRCUIT DIAGRAM SERVICE DATA Equipped with high ow angle blade blade oat option 2 2...
Страница 46: ...2 34 2 ELECTRIC CIRCUIT DIAGRAM SERVICE DATA First auxiliary hydraulic piping with proportional control...
Страница 49: ......
Страница 59: ...2 46 2 WIRE HARNESS WIRING DIAGRAM SERVICE DATA...
Страница 60: ...2 47 2 WIRE HARNESS WIRING DIAGRAM SERVICE DATA...
Страница 61: ...2 48 2 WIRE HARNESS WIRING DIAGRAM SERVICE DATA...
Страница 62: ...2 49 2 WIRE HARNESS WIRING DIAGRAM SERVICE DATA...
Страница 63: ...2 50 2 WIRE HARNESS WIRING DIAGRAM SERVICE DATA...
Страница 64: ...2 51 2 WIRE HARNESS WIRING DIAGRAM SERVICE DATA...
Страница 65: ...2 52 2 WIRE HARNESS WIRING DIAGRAM SERVICE DATA...
Страница 66: ...2 53 2 WIRE HARNESS WIRING DIAGRAM SERVICE DATA...
Страница 67: ...2 54 2 WIRE HARNESS WIRING DIAGRAM SERVICE DATA...
Страница 68: ...2 55 2 WIRE HARNESS WIRING DIAGRAM SERVICE DATA...
Страница 69: ...2 56 2 WIRE HARNESS WIRING DIAGRAM SERVICE DATA...
Страница 70: ...2 57 2 WIRE HARNESS WIRING DIAGRAM SERVICE DATA...
Страница 71: ...2 58 2 WIRE HARNESS WIRING DIAGRAM SERVICE DATA...
Страница 72: ...2 59 2 WIRE HARNESS WIRING DIAGRAM SERVICE DATA...
Страница 73: ...2 60 2 WIRE HARNESS WIRING DIAGRAM SERVICE DATA NAME STANDARD NO...
Страница 74: ...2 61 2 WIRE HARNESS WIRING DIAGRAM SERVICE DATA...
Страница 75: ...2 62 2 WIRE HARNESS WIRING DIAGRAM SERVICE DATA...
Страница 76: ...2 63 2 WIRE HARNESS WIRING DIAGRAM SERVICE DATA...
Страница 77: ...2 64 2 WIRE HARNESS WIRING DIAGRAM SERVICE DATA...
Страница 78: ...2 65 2 WIRE HARNESS WIRING DIAGRAM SERVICE DATA...
Страница 79: ...2 66 2 WIRE HARNESS WIRING DIAGRAM SERVICE DATA...
Страница 80: ...2 67 2 WIRE HARNESS WIRING DIAGRAM SERVICE DATA...
Страница 81: ...2 68 2 WIRE HARNESS WIRING DIAGRAM SERVICE DATA...
Страница 92: ...3 11 3 CONTROL VALVE FUNCTION...
Страница 108: ...4 3 4 SERVICE STANDARDS DISASSEMBLY AND ASSEMBLY Clearance for pin and bushing...
Страница 130: ...4 25 4 UPPER FRAME DISASSEMBLY AND ASSEMBLY 15 Side frame R 16 Side frame L 17 Tool box 18 Cover 19 Bracket 20 Cover 2 2...
Страница 165: ...4 60 4 HYDRAULIC PUMP DISASSEMBLY AND ASSEMBLY f Remove the plug g Remove the spring and the ball...
Страница 267: ...4 162 4 SLEW MOTOR DISASSEMBLY AND ASSEMBLY Special tools Oil seal press tting jig A Collar installation jig B...
Страница 352: ...ENGINE 6 Machine model Mounted engine TB250 4TNV88...