Table of Contents
Advertisement
80 Appendix
A-4 Troubleshooting for FRESH/RECIRC air changeover
A-4 Troubleshooting for FRESH/RECIRC air changeover
FRESH/RECIRC air changeover does not work.
Failure
When FRESH/RECIRC air selector switch of machine monitor is operated, recirculated or
Problem on
fresh air does not change over.
machine
(FRESH/RECIRC air changeover door (damper) does not rotate)
FRESH/RECIRC air changeover is not checked with self-diagnosis function.
Referring to "Testing FRESH/RECIRC air changeover", operate the FRESH/RECIRC air
selector switch and check operation of FRESH/RECIRC air changeover door (damper).
For each connector, see "Parts and connectors layout".
a The T-adapter is not prepared for the connector.
Since T-adapter is not provided for the connector ACECU of the air conditioner controller
Related
and the pin size is small, use the intermediate connector for troubleshooting (T-adapter is
information
also not provided for the intermediate connector, however, the pin size is larger).
When replacing the air conditioner wiring harness between connector ACECU of the air
conditioner controller and the intermediate connector, you must replace the entire air
conditioner unit.
Method of reproducing failure code: Turn starting switch to ON position.
Troubleshooting cannot be performed since the connector portion of the servomotor
cannot be checked while it is installed on machine.
No.
Cause
Defective fuse No. 19 in
1
fuse box F01.
Open circuit in wiring
harness
2
(wire breakage or
defective contact of
connector)
Ground fault in wiring
harness
3
(contact with ground
circuit)
Defective air conditioner
4
controller
Defective air conditioner
5
unit
Defective machine
monitor
6
(defective switch)
80-74
Procedure, measuring location, criteria, and remarks
If fuse is blown, circuit probably has ground fault.
1. Turn starting switch to OFF position.
2. Disconnect connector AC02.
3. Remove fuse No. 19 in fuse box F01.
Resistance Between F01-19 and AC02 (female) (3)
1. Turn starting switch to OFF position.
2. Disconnect connector AC02.
3. Remove fuse No. 19 in fuse box F01.
Between F01-19 and ground, or between AC02
Resistance
(female) (3) and ground
If no failures are found by the above checks, the air conditioner controller may
be defective. (Since this is an internal defect, troubleshooting cannot be
performed.)
If no failures are found by the above checks, the air conditioner unit may be
defective. (Since this is an internal defect, troubleshooting cannot be
performed.)
1. Turn starting switch to ON position.
2. Display the air conditioner operation screen on the machine monitor.
Press FRESH/RECIRC air selector switch.
(PC138-FKF-400-A-Z0-A)
Max. 1 z
Max. 1 z
Display of Recirc/Fresh
changes.
PC88MR-10
Advertisement
Chapters
Table of Contents
Troubleshooting
