Troubleshooting - Toshiba Carrier MMU-AP0071YHPUL Manuel D'installation

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 if
Heat exchanger
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 any
Fan
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 or
Drain pan
drain water is polluted.
q Maintenance List
Part 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.
Vibration, balance Replace the fan when vibration or
Dust / dirt, appearance balance is terrible.
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
Check code
Code : P10 Unit : 2–2
75
Unit number of
the malfunctioning
indoor unit
Cool
Mode Fan Speed
Check
Check
Code:P10
Unit:2–2
Return
Contact Information
Confirming an alarm history
Ten check codes in the past, troubled unit, and date when trouble occurred are displayed on "Alarm history"
screen.
Field setting menu(1/2)
1.Test mode
2.Register service info.
3.Alarm history
4.Monitor function
5.Setting louver position
Return
Set
Alarm history
Unit Code Date Time
1. 1–2 E04 01/07/2019 12:25
2. – – – –
3. – – – –
4. – – – –
Return
Reset
Deleting the alarm history
Alarm history
Reset all alarm data.
B3 Return
Yes No
– 20 –
When a trouble has occurred in the air conditioner, the
check code and the unit number of the indoor unit appear
on the display of the remote controller.
* The check code appears only while the unit is running.
Push the [ MONITOR] button or [ CANCEL] button
to display the check information screen.
While the check information screen appears:
Push the " Contact" [ F1] button to display
the contact number for service.
Push the " Information" [ F2] button to
display the model name and serial number of the unit.
1
Push the [ ] / [ ] button to select
"3. Alarm history" on the "Field setting menu"
screen, then push the " Set"
[ F2] button.
List of latest 10 alarm data is displayed.
* The oldest data are deleted in order to record the
new ones.
→ The date and time when the check code occurred
for the first time is displayed for the repeated
alarm.
1
Push the " Reset" [ F2] button
while the list of Alarm history is displayed.
2
Push the " Yes" [ F1] button
after the confirmation screen is displayed.
→ Delete the Alarm history in each remote controller
when the dual remote controller system is used.
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40-EN