Bosch Climate 5000 Series Service Manual page 18

Service Manual
6.4.2 Cooling mode
6.4.2.1 Compressor running rules
Reach the confi gured temperature:
1. When the compressor runs continuously for within 120 minutes.
 If the following conditions are satisfied, the compressor ceases
operation.
 Calculated frequency(fb) is less than minimum limit frequency
(FminC).
— Compressor runs at FminC more than 10
minutes
— T1 is lower than or equal to (Tsc-CDIFTEMP-
0.5°C)
C DIFTEMP is EEPROM setting parameter. It is 2°C usually.
2. When the compressor runs continuously for more than 120 minutes.
 If the following conditions are satisfied, the compressor ceases
operation.
— Calculated frequency(fb) is less than
minimum limit
frequency(FminC)
— Compressor runs at FminC more than 10
minutes.
— T1 is lower than or equal to (Tsc-CDIFTEMP).
C DIFTEMP is EEPROM setting parameter. It is 2°C usually.
3. If one of the following conditions is satisfi ed, not judge protective time.
 Compressor running frequency(fr) is more than test frequency
(TestFre).
 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
 Various frequency limit shutdown occurs.
6.4.2.2 Outdoor fan running rules
The outdoor unit will run at diff erent fan speeds according to T4 and
compressor running frequency. For diff erent outdoor units, the fan speeds
are diff erent.
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6.4.2.3 Indoor fan running rules
1. In cooling mode, the indoor fan operates continuously. The fan speed
can be set to 1%-100%, or auto.
2. Auto fan
For DC fan motor units:
 Descent curve
— When T1-Tsc is lower than or equal to
3.5°C, fan speed reduces to 80%;
— When T1-Tsc is lower than or equal to 1°C,
fan speed reduces to 60%;
— When T1-Tsc is lower than or equal to
0.5°C, fan speed reduces to 40%;
— When T1-Tsc is lower than or equal to 0°C,
fan speed reduces to 20%;
— When T1-Tsc is lower than or equal to
-0.5°C, fan speed reduces to 1%.
 Rise curve
— When T1-Tsc is higher than 0°C, fan speed
increases to 20%;
— When T1-Tsc is higher than 0.5°C, fan
speed increases to 40%;
— When T1-Tsc is higher than 1°C, fan speed
increases to 60%;
— When T1-Tsc is higher than 1.5°C, fan
speed increases to 80%;
— When T1-Tsc is higher than 4°C, fan speed
increases to 100%.