Troubleshooting - Carrier 40VU S-8S-TST Installation Manual

q Periodic Maintenance
For environmental conservation, it is strongly recommended that the indoor and outdoor units of the air conditioner
in use be cleaned and maintained regularly to ensure efficient operation of the air conditioner.
When the air conditioner is operated for a long time, periodic maintenance (once a year) is recommended.
Furthermore, regularly check the outdoor unit for rust and scratches, and remove them or apply rustproof treatment,
if necessary.
As a general rule, when an indoor unit is operated for 8 hours or more daily, clean the indoor unit and outdoor unit
at least once every 3 months. Ask a professional for this cleaning / maintenance work.
Such maintenance can extend the life of the product though it involves the owner's expense.
Failure to clean the indoor and outdoor units regularly will result in poor performance, freezing, water leakage, and
even compressor failure.
Inspection before maintenance
Following inspection must be carried out by a qualified installer or qualified service person.
Parts
Access from inspection opening and remove the access panel. Examine the heat exchanger
Heat exchanger
if there is any clogging or damages.
Fan motor Access from inspection opening and check if any abnormal noise can be heard.
Access from inspection opening and remove the access panel. Examine the fan if there are
Fan
any waggles, damages or adhesive dust.
Filter Go to installed location and check if there are any stains or breaks on the filter.
Access from inspection opening and remove the access panel. Check if there is any clogging
Drain pan
or drain water is polluted.
q Maintenance List
Parts Unit
Heat exchanger Indoor / outdoor
Fan motor Indoor / outdoor
Filter Indoor
Fan Indoor
Air intake / discharge
Indoor / outdoor
grilles
Drain pan Indoor
Ornamental panel,
Indoor
louvers
Exterior Outdoor
39-EN
Inspection method
Check (visual / auditory) Maintenance
Wash the heat exchanger when it is
Dust / dirt clogging, scratches
clogged.
Take appropriate measures when
Sound
abnormal sound is generated.
• Wash the filter with water when it is
Dust / dirt, breakage contaminated.
• Replace it when it is damaged.
• Replace the fan when vibration or
• Vibration, balance balance is terrible.
• Dust / dirt, appearance • Brush or wash the fan when it is
contaminated.
Fix or replace them when they are
Dust / dirt, scratches
deformed or damaged.
Dust / dirt clogging, drain Clean the drain pan and check the
contamination downward slope for smooth drainage.
Wash them when they are contaminated
Dust / dirt, scratches
or apply repair coating.
• Rust, peeling of insulator
Apply repair coating.
• Peeling / lift of coat
11

Troubleshooting

„ Confirmation and check
If a problem occurs with the air
conditioner, the OFF timer indicator
alternately shows the check code and
the indoor Unit No. in which the
problem occurred.
„ Confirmation of error log
You can check the troubleshooting history with the following procedure if a problem occurs with the air conditioner.
(The troubleshooting history records up to 4 incidents.)
You can check it during operation or when operation is stopped.
y If you check the troubleshooting history during OFF timer operation, the OFF timer will be canceled.
Procedure
Push the OFF timer button for over 10 seconds
and the indicators appear as an image indicating the
troubleshooting history mode has been entered.
If [ Service check] is displayed, the mode enters in
the troubleshooting history mode.
1
y [01: Order of troubleshooting history] appears in the
temperature indicator.
y The OFF timer indicator alternately shows the [check
code] and the [indoor Unit No.] in which the problem
occurred.
Each time the setting button is pushed, the recorded
troubleshooting history is displayed in sequence.
The troubleshooting history appears in order from [01]
(newest) to [04] (oldest).
2
CAUTION
In the troubleshooting history mode, DO NOT push
the Menu button for over 10 seconds, doing so
deletes the entire troubleshooting history of the
indoor unit.
After you have finished checking, push the ON/OFF
button to return to the regular mode.
3
y If the air conditioner is operating, it remains operated
even after the ON/OFF button has been pushed.
To stop its operation, push the ON/OFF button again.
– 20 –
Check code The indoor Unit No. in which
the problemoccurred.
Description of operation
EN
40-EN