Maintenance; Troubleshooting - Toshiba MMW-AP0271LQ-E Installation Manual

12

Maintenance

▼ Periodic Maintenance
• For environmental conservation, it is strongly recommended that the indoor and outdoor units of the air
conditioner (including hot water module) in use be cleaned and maintained regularly to ensure efficient operation
of the air conditioner.
When the air conditioner (including hot water module) 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 front panel. Check if there is any clogging or drain
Drain pan
water is polluted.
▼ Maintenance List
Part Unit
Heat exchanger Outdoor
Fan motor Outdoor
Air inlet / outlet grilles Outdoor
Drain pan Hot water module
Hot water module /
Exterior
Outdoor
Water pipes Hot water module
Strainer Hot water module
It recommends that a pump and a strainer are maintained periodically.
49-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.
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.
• Rust, peeling of insulator
Apply repair coating.
• Peeling / lift of coat
Rust, leakage
Checking
Evidence of leakage
Dust / dirt clogging Checking
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13

Troubleshooting

 Confirmation and check
When an error occurred in the hot water module, an
error code and indoor UNIT No. (including hot water
module) appear on the display part of the remote
controller.
The error code is only displayed during the operation.
If the display disappears, operate the hot water module
according to the following "Confirmation of error log" for
confirmation.
Error code Indoor UNIT No. (including hot
water module) in which an error
occurred
 Confirmation of error log
When an error occurred on the hot water module, 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 (including hot water module) will be deleted.
3
After confirmation, push button to return to the
usual display.
50-EN