Troubleshooting - Toshiba MMD-AP0724H-E Installation Manual

SMMS Concealed Duct High Static Pressure Type
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 there
Heat exchanger
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
Drain pan
water is polluted.
▼ Maintenance List
Part Unit
Heat exchanger Indoor / outdoor Dust / dirt clogging, scratches
Fan motor Indoor / outdoor Sound
Filter Indoor Dust / dirt, breakage
• Vibration, balance
• Dust / dirt, appearance
Fan Indoor
Air intake / discharge
Indoor / outdoor Dust / dirt, scratches
grilles
Dust / dirt clogging, drain
Drain pan Indoor
contamination
Ornamental panel,
Indoor Dust / dirt, scratches
louvres
• Rust, peeling of insulator
Exterior Outdoor
• Peeling / lift of coat
33-EN
Installation Manual
Inspection method
Check (visual / auditory) Maintenance
Wash the heat exchanger when it is
clogged.
Take appropriate measures when
abnormal sound is generated.
• Wash the filter with water when it is
contaminated.
• Replace it when it is damaged.
• Replace the fan when vibration or
balance is terrible.
• Brush or wash the fan when it is
contaminated.
Fix or replace them when they are
deformed or damaged.
Clean the drain pan and check the
downward slope for smooth drainage.
Wash them when they are contaminated
or apply repair coating.
Apply repair coating.
SMMS Concealed Duct High Static Pressure Type
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12

Troubleshooting

Confirmation and check
When an error occurred in the air conditioner, an error
code and indoor UNIT No. appear on the display part
of the remote controller.
The error code is only displayed during the operation.
If the display disappears, operate the air conditioner
according to the following "Confirmation of error log" for
confirmation.
Error code Indoor UNIT No. in
which an error occurred
Installation Manual
Confirmation of error log
When an error occurred on the air conditioner, the error
log can be confirmed with the following procedure.
(The error log is stored in memory up to 4 errors.)
The log can be confirmed from both operating status
and stop status.
2
3
1
1
When and buttons are pushed simultaneously
for 4 seconds or more, the following display appears.
If is displayed, the mode enters in the error log
mode.
• [01: Order of error log] is displayed in CODE No..
• [Error code] is displayed in CHECK.
• [Indoor unit address in which an error occurred] is
displayed in Unit No..
2
Every pushing of button used to set
temperature, the error log stored in memory is
displayed in order.
The numbers in CODE No. indicate CODE No. [01]
(latest) → [04] (oldest).
REQUIREMENT
Do not push button because all the error log of the indoor
unit will be deleted.
3
After confirmation, push button to return to the
usual display.
34-EN