Maintenance - Toshiba MMW-AP0271LQ-E Installationsanleitung

 Items to check before conducting a trial operation
Check the following items before the trial operation. The numbers in (parentheses) are the chapter numbers in the
table of contents of the installation manual.
Is the equipment attached to the legs with bolts? (See chapter 5.)
Is there sufficient open space around the equipment for servicing? (See
Installation work chapter 5.)
Have the criteria for selecting a location to install the equipment been met?
(See chapter 4.)
Are all of the pipes connected correctly? (See chapter 5.)
Are there no water leaks?
Is the flow rate suitable? (See chapter 6.)
Is the strainer in a suitable location? (See chapters 3 and 6.)
Is the line heater in a suitable location and is the flow rate suitable? (See
chapters 3 and 6.)
Have suitable safety devices for pressure relief and expansion tanks been
Piping work
installed? (See chapters 3 and 6.)
Is the shut-off valve in a suitable location? (See chapters 3 and 6.)
Is the air vent valve in a suitable location? (See chapters 3 and 6.)
Is the piping material suitably heat resistant and corrosion resistant? (See
chapters 6 to 8.)
Can water discharge through the drain? (See chapter 7.)
Was the heat-retention work done suitably? (See chapters 6 to 8.)
Is the electric wiring connected correctly? (See chapter 9.)
Is the electric wiring thick enough? (See chapter 9.)
Electric wiring work Is the power fed from a dedicated ground fault circuit breaker?
Is the output terminal wired? (See chapter 9.)
Is the addressed fixed? (*1)
Has DIP switch 4 of SW09 on the interface board of the header outdoor
Outdoor unit board settings
unit been set to "ON" (factory default is "OFF")? (See chapter 9.) (*2)
*1 Do not operate the air conditioner (run the compressor) before the address to the hot water module is fixed.
Doing so will cause the heat exchanger in the hot water module to freeze, rupture, and leak water.
*2 Set DIP switch 4 of SW09 on the P.C. board of the header outdoor unit to "ON" (factory default is "OFF").
The VRF system will be stopped to avoid water freezing when the power supply is disconnected.
NOTE
Before you run the compressor, always confirm that the hot water module is operable (power on, address fixed,
communication wiring complete).
Failure to do this will cause the heat exchanger in the hot water module to freeze, rupture, and leak water.
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Maintenance

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Periodic Maintenance
• For environmental conservation, it is strongly recommended that the indoor and outdoor units of the air
Check
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
Drain pan
▼
Maintenance List
Part
Heat exchanger
Fan motor
Air inlet / outlet grilles
Drain pan
Exterior
Water pipes
Strainer
Air vent valve
It recommends that a pump and a strainer are maintained periodically.
Inspection method
Access from inspection opening and remove the front panel. Check if there is any clogging or drain
water is polluted.
Unit Check (visual / auditory)
Outdoor Dust / dirt clogging, scratches
Outdoor Sound
Outdoor Dust / dirt, scratches
Dust / dirt clogging, drain
Hot water module
contamination
• Rust, peeling of insulator
Hot water module /
Outdoor
• Peeling / lift of coat
Rust, leakage
Hot water module
Evidence of leakage
Hot water module Dust / dirt clogging
Hot water module Air entrainment
Maintenance
Wash the heat exchanger when it is
clogged.
Take appropriate measures when
abnormal sound is generated.
Fix or replace them when they are
deformed or damaged.
Clean the drain pan and check the
downward slope for smooth drainage.
Apply repair coating.
Checking
Checking
Checking an air vent valve
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