Case WX145 - Blower System Troubleshooting

TROUBLESHOOTING
5-23
BLOWER
PROBLEM POSSIBLE CAUSE CORRECTION
Blower not working. Fuse blown or loose. Check fuse contact, if necessary plug
in correctly. Replace defective fuse.
Reappearance of the defect after a
short time indicates a short-circuit.
Check blower for blocking or other
faults. Eliminate the cause.
Connector loose. Check that connector at machine side
is firmly in place and correct, if
necessary.
Check connection of blower switch.
Open the machine and check the
electrical connections inside.
Connecting cable damaged or ripped
off.
Replace cable, observing correct
cable run and connection.
Electrical connections interchanged. Check connecting cables and
reconnect properly, if necessary.
Defective blower switch. Replace by new original spare switch.
Blower unit locked. Eliminate the cause of the blockage,
e.g. by removing foreign object from
rotor. If necessary, install a new
blower.
Defective blower motor. Replace the blower.
Blower cannot be switched off. Defective blower switch. Replace blower switch.
The blower operates at low
performance.
Rated supply voltage incorrect. Rated voltage of conditioner and of
vehicle system must be identical.
Replace the blower.
Dirty clamps. Clean connector contacts. Proceed
with care to avoid short-circuits.
Heat exchanger heavily
contaminated.
Clean carefully, to avoid causing
damage that might result in
consequential leaks.
Blower ducts obstructed. Check for no obstructions on the
ports or air outlets. Eliminate the
cause.