Tosot TM09HEDI Service Manual Download

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Technical Information

Service Manual

6.3 Brief Description of Modes and Functions

1) Mode Conflict Protection of indoor unit

When the setting mode is different of different indoor unit, the unit runs in below status:

a. The mode of the first operating indoor unit is the basic mode, then compare the mode of the other

indoor units to see if there is a conflict. Cooling mode (dry mode) is in conflict with heating mode.

b. Fan mode is in conflict with heating mode and the heating mode is the basic mode. No matter which

indoor unit operates first, the unit will run in heating mode.
2) Communication malfunction
Detection of the quantity of installed indoor units: After 3min of energizing, if the outdoor unit does not
receive the communication data of certain indoor unit, the outdoor unit will judge that indoor unit is not installed
and will treat it as it is not installed. If the outdoor unit receives the communication data of that indoor unit later,
the outdoor unit will treat that unit as it is installed.
Control Function of Indoor Unit
1) Running Mode
1.COOL 2.DRY 3.HEAT 4.AUTO 5 FAN
2) Basic Functions of the System
a. COOL Mode
Under this mode, the fan and swing function goes as the set conditions, and the set temperature range is 16

℃

~30

℃

b. DRY Mode
Under this mode, the fan will run at the low speed and the swing function is performed under the set
conditions. The set temperature range is 16~30

℃

c. FAN Mode
Under this mode, only the fan of the indoor unit runs. And if the auto speed is set, the fan will run under the
same condition as the COOL mode.
d. HEAT Mode
a) Under this mode, the set temperature rang is 16

℃

~30

℃

b) The defrosting symbol “H1” will be displayed when the defrosting signal is received from the outdoor unit.
e. AUTO Mode
a) When the ambient temperature is higher than 25

℃

, the unit will run as the COOL mode.

b) For the cooling and heating unit, if the ambient temperature is or lower than22

℃

, the unit will run as the

HEAT mode.
c) When the indoor ambient temperature is higher than 22

℃

but lower than 26

℃

, the system will run at

the FAN mode, and the set temperature is 24

℃

. In this case, if other indoor unit runs at the HEAT mode, a

mode conflict alarm will be raised.
3) Other Control
a. Beeper Control
When the controller is powered on or it receives a valid either press button signal or remote control signal,
the beeper will utter a warning tone.
b. Auto Speed Control
a) Under the HEAT Mode: (Ambient temperature herein is the temperature without temperature compensation)
When the ambient temperature is or lower than the set temperature, the indoor unit runs at the high speed.
When the ambient temperature is higher than the set temperature but lower than the set temperature plus

℃

, the indoor unit fan runs at the medium speed.

When the ambient temperature is or lower than the set temperature plus 2

℃

, the fan runs at the low speed.

b) Under the COOL and FAN Modes
When the ambient temperature is or higher than the set temperature plus 3

℃

, the indoor unit runs at high speed.

When the ambient temperature is higher than the set temperature plus 1

℃

but lower than the set

temperature plus 3

℃

, the indoor unit fan runs at the medium speed.

When the ambient temperature is or lower than the set temperature plus 1

℃

, the fan runs at the low speed.

c) Once the fan starts at a certain speed, it will keep running at this speed for no less than 30 seconds
prior to any changeover stated above.
c. AUTO Press Button
The whole unit will run under the AUTO mode by pressing this button when the unit is off. In this condition,
the fan of the indoor unit will run at the auto speed with the swing function activated. When the unit is on, it will
be turned off by pressing this button. This button is unavailable to the floor/ceiling unit.