Electronic Functions; Abbreviation; Display Function; Main Protection - Bosch Climate 5000 Series Service Manual

6 Electronic Functions

6.1 Abbreviation

T1: Indoor room temperature
T2: Coil temperature of evaporator
T3: Coil temperature of condenser
T4: Outdoor ambient temperature
Tsc: Adjusted setting temperature
TP: Compressor discharge temperature

6.2 Display Function

6.2.1 Icon explanation on indoor display board.
Figure 16
Display
Temperature value
Table 9
Bosch Wall Mounted Ductless Split Air Conditioner / Heat Pump IDU-ODU - BTC 769102301 A (11.2022)
Function
ECO function (available on select units
only)
Temperature
Timer ON is set.
Activation of , Fresh, Swing, Turbo, ECO,
Breeze away, ECO intelligent or Silence
Timer OFF is set.
Cancellation of Fresh, Swing, Turbo, ECO,
Breeze away, ECO intelligent or Silent
Defrost
Active Clean (For Inverter split type) or
self-cleaning(For Fixedspeed type)
Heating in room temperature under 8°C

6.3 Main Protection

6.3.1 Compressor three-minute delay at restart
Compressor functions are delayed for up to ten seconds upon the fi rst startup of
the unit, and are delayed for up to three minutes upon subsequent unit restarts.
6.3.2 Automatic shutoff based on discharge temperature
If the compressor discharge temperature exceeds a certain level for a period of
time, the compressor ceases operation.
6.3.3 Automatic shutoff based on fan speed
If the indoor fan speed registers below 200RPM or over 2100RPM for an extended
period of time, the unit ceases operation and the corresponding error code is
displayed on the indoor unit.
6.3.4 Inverter module protection
The inverter module has an automatic shutoff mechanism based on the
unit's current, voltage, and temperature. If automatic shutoff is initiated, the
corresponding error code is displayed on the indoor unit and the unit ceases
operation.
6.3.5 Indoor fan delayed operation
 When the unit starts, the louver is automatically activated and the indoor
fan will operate after a period of setting time or the louver is in place.
 If the unit is in heating mode, the indoor fan is regulated by the anti-cold
wind function.
6.3.6 Compressor preheating
Preheating is automatically activated when T4 sensor is lower than setting
temperature.
6 .3.7 Sensor redundancy and automatic shutoff
 If one temperature sensor malfunctions, the air conditioner continues
operation and displays the corresponding error code, allowing for
emergency use.
 When more than one temperature sensor is malfunctioning, the air
conditioner ceases operation.

6.4 Operation Modes and Functions

6.4.1 Fan mode
1. Outdoor fan and compressor stop.
2. Temperature setting function is disabled and indoor room temperature is
displayed.
3. Indoor fan can be set to 1%~100%, or auto.
4. The louver operates same as in cooling mode.
5. Auto fan: In fan-only mode, AC operates the same as auto fan in cooling
mode with the temperature set at 24°C.(Tsc =24°C)
Service Manual
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