Maeda CC1908S-1 - Page 317

M A E D A Crawler Crane 6.20 TROUBLESHOOTING
5/2020 CC1908S-1 6-109
AIR-CONDITIONING
Abnormal phenomenon Main causes Corrective action
Control panel does not work.
Blown fuse Replace
Defective wiring
Inspect/repair (★)
Defective control panel Inspect/replace (★)
Air flow is weak
Internal or external filter clogging
Refer to "6.17.6 MAINTENANCE
EVERY 500 HOURS" on P. 6-60
and clean.
Blower deformation or damage
Replace (★)
Insufficient battery charge Recharge the battery.
Defective blower motor Replace (★)
Defective power transistor
Replace (★)
Blown fuse Replace
No air blows out.
Blown fuse Replace
Defective blower relay
Replace (★)
Defective blower motor
Replace (★)
Defective power transistor Replace (★)
Defective air-conditioner panel
Replace (★)
Defective ground
Inspect/repair (★)
Defective wiring Inspect/repair (★)
Blown fuse Replace
No cool air
Defective exterior air
temperature sensor
Inspect/clean/replace (★)
Air mix link detached
Inspect/repair (★)
A/C compressor belt loose or
damaged
Refer to "6.17.5 MAINTENANCE
EVERY 250 HOURS" on P. 6-54
and adjust the tension or replace
(★).
Defective compressor
Replace (★)
Defective magnet clutch
Repair/replace (★)
Defective servo motor Replace (★)
Defective wiring
Inspect/repair (★)
Blown fuse Replace
No warm air
Air mix link detached Inspect/repair (★)
Insufficient of cooling water
Refer to "5.2.2 OPERATIONS
AND CHECKS BEFORE
STARTING ENGINE" on P. 5-6
and ensure the cooling water
level is correct.
Heater core damage
Replace (★)
Defective servo motor
Replace (★)
Defective wiring
Inspect/repair (★)
Blown fuse Replace