Product Features; Operation Modes And Functions; Abbreviation; Safety Features - Bosch CLIMATE 5000 Service Manual

3

Product Features

3.1

Operation Modes and Functions

3.1.1

Abbreviation

Unit element abbreviations
Abbreviation Element
T1 Indoor room temperature
T2 Coil temperature of evaporator
T3 Coil temperature of condenser
T4
Outdoor ambient temperature
TS
Set temperature
TP
Compressor discharge temperature
Table 4.
3.1.2

Safety Features

Compressor three-minute delay at restart
Compressor functions are delayed for up to one minute upon the
first startup of the unit, and are delayed for up to three minutes upon
subsequent unit restarts.
Zero crossing detection error protection
If AC can not detect zero crossing signal for 4 minutes or the zero
crossing signal time interval is not correct, the unit will stop and the
LED will display the failure. The correct zero crossing signal time interval
should be between 6-13ms.
Automatic shutoff based on discharge temperature
If the compressor discharge temperature exceeds 108°C for a period of
time, the compressor ceases operation.
Automatic shutoff based on fan speed
If the indoor fan speed registers below 300RPM for an extended period
of time, the unit ceases operation and the corresponding error code is
displayed on the indoor unit.
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.
Indoor fan delayed operation
• When the unit starts, the louver is automatically activated and the
indoor fan will operate after a period of 7 seconds.
• If the unit is in heating mode, the indoor fan is regulated by the
anti-cold wind function.
Compressor preheating
Preheating is automatically activated when T4 sensor is lower than 3°C.
Sensor redundancy and automatic shutoff
• If one temperature sensor malfunctions, the air conditioner contin-
ues operation and displays the corresponding error code, allowing
for emergency use.
• When more than one temperature sensor is malfunctioning, the air
conditioner ceases operation.
CLIMATE 5000 RAC SINGLE SPLIT (R32) – 6720894076 (2019/08)
Refrigerant leakage detection
This function is active only when cooling mode is selected. It will
detect if the compressor is being damaged by refrigerant leakage or by
compressor overload. This is measured using the coil temperature of
evaporator T2 when the compressor is in operation.
3.1.3

Display Function

Unit display functions
Fig. 4.
Function
Temperature
Temperature (fan and Drying mode)
Activation of Timer ON, Fresh, Swing,
Turbo, or Silent
Cancellation of Timer OFF, Fresh, Swing,
Turbo, or Silent
Defrost
Warming in heating mode
Self-clean (available on select units only)
Heating in room temperature under 8°C
Table 5.
3.1.4

Fan Mode

When fan mode is activated:
• The outdoor fan and compressor are stopped.
• Temperature control is disabled and no temperature setting is
displayed.
• The indoor fan speed can be set to high, medium, low, or auto.
• The louver operations are identical to those in cooling mode.
• Auto fan: In fan-only mode, AC operates the same as auto fan in
cooling mode with the temperature set at 24°C.
3.1.5

Cooling Mode

Compressor Control
∆T means the temperature difference between indoor room temperature
T1 and set temperature Ts: ∆T =T1-Ts
• When ∆T<-2K , the compressor ceases operation.
• When ∆T>+3K, the compressor continues operation.
• When the AC is operating in mute mode, the compressor operates
at a low frequency.
• When the current exceeds the preset value, the current protection
function activates and the compressor ceases operation.
Product Features
Display
Set temperature value
Room temperature
ON
(3s)
OF
(3s)
SC
FP
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