Carrier 33TB-AC01 - Temperature selector; Energy saving button; Light indicators; Diagnostic warnings

GB - 4
Type B Electronic Control
Control
Temperature selector
Its purpose is to maintain the temperature at the desired level. The
reference value at the centre of the range is 20°C.
By turning the knob towards the symbol ( – ) the temperature is
reduced from the original setting (minimum value is 10°C).
By turning the knob towards the symbol ( + ), the temperature is
raised from the original setting (maximum value is 30°C).
Energy saving button
This button activates the energ[UCXKPIHWPEVKQPYJKEJOQFKſGU
room temperature as follows: in heating, the selected temperature is
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Light indicators
Blue LED
ON Indicates that the control is in cooling mode

Flashing Indicates that the control is in frost protection
mode (
).
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ON Indicates that the control is in heating mode (
).
Flashing Indicates the presence of a fault (sensor failed or
not connected)
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ON Indicates that the control is in automatic mode (
).
Blue LED + <HOORZLED
Both ON Indicates that the control is in automatic mode
(
) - cooling mode .
Red LED<HOORZLED
Both ON Indicates that the control is in automatic mode
(
) - heating mode ( )
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ON Indicates that the fan is operating at the selected
speed.
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ON Indicates that the selection of the fan speed is
set automatically.
Red / Blue LED
Flashing Indicates that the control is in
“Autotest” mode .
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ON Indicates that the control is in Energy Saving mode.
Flashing External contact is open.
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In open contact position, it allows to activate the frost protection
function 

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In open contact position, it permits the fan operation at the selected
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In open contact position, it restricts the range of the temperature
selection knob according to the following limits:
Cooling: minimum selectable temperature: 23°C.
+HDWLQJ maximum selectable temperature: 21°C.
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In open contact position, it permits to activate the fan periodically
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In open contact position, it permits to activate the Booster Heating
function (additional heating).
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NOTE:
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Internal sensor:
This is used in all installations where the control is wall-mounted. To
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board screenprint.
Remote sensor:
This is used on all installations with unitmounted control. It is
positioned on the return air, close to the fan. To activate it, close
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screenprint.
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The following alarm situations are indicated:
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Possible causes:
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Autotest
The autotest function is activated by holding the seasonal
changeover button pressed and at the same time pressing the “
” button three times within 1 second. In this way it is possible to
check the starting of all fan coils. The blue and red LEDs will begin
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Each of the various units will be activated for 10 seconds in the
following sequence:
Low fan speed.
Medium fan speed.
High fan speed.
&9 Motorized cold-water valve.
+9 Motorized hot-water valve.
X3 X3
Internal sensor 4GOQVGUGPUQT
Fig. A Fig. B
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