Bosch Climate 5000 Series Service Manual page 19

6.4.2.4 Condenser temperature protection
When the condenser temperature exceeds a confi gured value, the
compressor ceases operation.
Figure 17
Legend:
TP1 = 54C
TP2 = 56C
TP3 = 60C
TP4 = 65C
6.4.2.5 Evaporator temperature protection
°C
Figure 18
 Off: Compressor stops.
 Decrease: Decrease the running frequency to the lower level per 1
minute.
 Hold: Keep the current frequency.
 Resume: No limitation for frequency.
Bosch Wall Mounted Ductless Split Air Conditioner / Heat Pump IDU-ODU - BTC 769102301 A (11.2022)
6.4.3 Heating mode
6.4.3.1 Compressor operation
1. Reach the confi gured temperature
 If the following conditions are satisfied, the compressor ceases
operation.
— Calculated frequency(fb) is less than minimum
limit frequency(FminH).
— Compressor runs at FminH more than 10
minutes.
— T1 is higher than or equal to Tsc+ HDIFTEMP2.
H DIFTEMP2 is EEPROM setting parameter. It is 2°C usually.
 If one of the following conditions is satisfi ed, not judge protective
time.
— Compressor running frequency(fr) is more
than test frequency(TestFre)
— When compressor running frequency is equal
to test frequency, T4 is more than 15°C or T4
fault
— Change setting temperature
— Turbo or sleep function on/off
2. When the current is higher than the predefi ned safe value, surge
protection is activated, causing the compressor to cease operations.
6.4.3.2 Outdoor fan operation
The outdoor unit will be run at diff erent fan speed according to T4 and
compressor running frequency.
For diff erent outdoor units, the fan speeds are diff erent.
6.4.3.3 Indoor fan operation
1. In heating mode, the indoor fan operates continuously. The fan speed
can be set to 1%-100%, or mute. The anti-cold wind function has the
priority.

Anti-cold function : The indoor fan is controlled by the indoor
temperature T1 and indoor unit coil temperature T2
Figure 19
Legend:
TEH0=25C, TEH1=32C, TEH2=33C,
Service Manual
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