Air Conditioner Operations And Performance; Hints For Economical Operation - Toshiba MiNi-SMMS MCY-MAP0501HT Service Manual

If you do not plan to use the unit for more than 1 month
1. Operate the fan for 3 to 4 hours to dry the inside of the unit
• Operate "FAN" mode.
2. Stop the air conditioner and turn off the main power supply
or the circuit breaker.
Checks before operation
1. Check that the air filters are installed.
2. Check that the air outlet or inlet is not blocked.
3. Turn on the main power switch or the circuit breaker for the
main power supply to the air conditioner.
For Air conditioning system which is operated regularly, cleaning and maintenance of the indoor/outdoor
units are strongly recommended.
As a general rule, if an indoor unit is operated for about 8 hours daily, the indoor/outdoor units will need to
be cleaned at least once every 3 months. This cleaning and maintenance shall be carried out by a quali-
fied person.
Failure to clean the indoor/outdoor units regularly will result in poor performance, icing, water leakage and
even compressor failure.

HINTS FOR ECONOMICAL OPERATION

Maintain room temperature at comfortable level
Clean air filters
The clogged air filter impairs the performance of the air conditioner.
Never open doors and windows more than what is necessary
To keep the cool or warm air in the room, never open doors and
windows more than what is necessary.
Window curtains
In cooling, close the curtains to avoid direct sunlight.
In heating, close the curtains to keep the heat in.
Ensure uniform circulation of room air
Adjust the air flow direction so that the air
is evenly circulated throughout the room.
I will wipe soft
and dry cloth!
Use after drying
when it has not been
used for a long time!
NOTE
Gee, chilly
Control
Clean, please.
Blows upward
Air flow adjustment
Cool and
dry air
Warm
air
Blows downward

3-13. Air Conditioner Operations and Performance

Check before operation
• Check whether earth wire is disconnected or out of place.
• Check that air filter is installed to the indoor unit.
Heating capacity (for Heat-pump model only)
• During heating operation the heat pump system operates by
absorbing the heat from the outside air and discharging it into the room.
Therefore if the outside temperature drops, the units heating capacity will decrease.
• When temperature of the outside air is low, it is recommended that you use other forms of heating in conjunction
with the air conditioner.
Defrost operation during heating operation (for Heat-pump model only)
• If the outdoor unit has a build up of frost during the heating operation, the operation mode changes automati-
cally to defrost mode to increase the heating effect (for approximately 2 to 10 minutes).
• During defrost operation, fans of the indoor and the outdoor units will stop.
Protection for 3 minutes
• The outdoor unit will not operate for approximately 3 minutes after the air conditioner has been immediately
restarted after being stop, or the power supply has been turned on. This is to protect the system.
Main power failure
• If a power failure occurs during operation, all operations stop.
• When restarting the unit, push the ON/OFF button again.
Fan rotation of stopped unit
• When other indoor units within the same system are in operation, the fan on the indoor units that are on "stand-
by" will rotate to protect the machine once approximately 1 hour for several minutes.
Protective device (High pressure switch)
The high pressure switch operates the unit automatically when excessive load is applied to the air conditioner.
If the protective device operates, the operation lamp will stay but the operation will stop.
When the protective device operates, check characters " " on the remote controller display.
The protective device may operate in the following cases.
In Cooling operation
• When suction or discharge port of the outdoor unit is closed.
• When strong winds blow continuously against the discharge port of the outdoor unit.
In Heating operation (For Heat-pump model only)
• When excessive dirt or dust is adhered to the air filter of the indoor unit.
• When the discharge port of the indoor unit is blocked.
Cooling/heating operation of MiNi-SMMS air conditioner
In MiNi-SMMS air conditioner, each indoor unit can be individually controlled. However, cooling operation and
heating operation cannot be performed concurrently for the indoor units, which are connected to the same outdoor
unit.
When cooling operation and heating operation are performed concurrently, the indoor unit which is performing
cooling operation stops, and the " " on the unit display will be lit. The indoor unit that is in heating mode will
continue operation.
If the manager has fixed the setting to COOL or HEAT, no other operation can be performed.
When another operation other than the set up one is performed, the "
the indoor unit.
Characteristics of heating operation (For Heat-pump model only)
• Hot air will not be blown out immediately from the indoor unit. It will take between 3 to 5 minutes (depending on
temperature conditions of the room and the outside) before the indoor heat exchanger warms up sufficiently, to
allow hot air to be blown.
• During operation, the outdoor unit may stop if the outside temperature becomes to high.
• When other indoor units are in heating operation, the fan operation of the indoor unit on fan only operation may
be stopped temporarily to prevent hot air from being blown out.
48
WARNING
Turn on the power supply 12
hours or more before starting
the air conditioner.
" light is displayed on the display part of