Electronic Functions; Abbreviation; Electric Control Working Environment; Main Protection - Bosch Climate 5000 Series Service Manual

Service Manual

7 Electronic Functions

7.1 Abbreviation

T1: Indoor ambient temperature
T2: Middle indoor heat exchanger coil temperature
T2B: Indoor heat exchanger exhaust coil temperature (located on the outdoor unit)
T3: Outdoor heat exchanger pipe temperature
T4: Outdoor ambient temperature
T5: Compressor discharge temperature

7.2 Electric Control Working Environment

Input voltage
Input power frequency
Indoor fan standard working amp.
Outdoor fan standard working amp.
Four-way valve standard amp.
Table 13

7.3 Main Protection

7.3.1 Compressor Restart Delay
The compressor takes 1 minute to start up the first time. Further restarts take 3
minutes.
7.3.2 Temperature Protection of Compressor Discharge
When the discharge temperature of the compressor rises, the running frequency is
limited according to the following rules:
If 105 °C (221 °F) ≤ T5 < 110 °C (230 °F), maintain the current
f
frequency.
If the temperature increases and T5 ≥ 110 °C (230 °F), decrease the
f
frequency to a lower level every 2 minutes to F1.
If T5 ≥ 115 °C (239 °F) for 10 seconds, the compressor stops and then
f
restart until T5 < 90 °C (194 °F).
7.3.3 Fan Speed Malfunction
If outdoor fan speed is lower than 100RPM or higher than 2400RPM for 60
seconds or more, the unit stops and LED displays failure code.
7.3.4 Inverter Module Protection
The inverter protection module ensures that faults related to current, voltage, or
temperature does not damage the inverter.
If these protections are triggered, the A/C unit stops and the LED displays the
failure code.
The unit restarts 3 minutes after the protection mechanism has turned off.
2 6 |
7.3.5 Low Voltage Protection
If low voltage protection triggers and voltage is not restored to normal within 3
minutes, the protection remains active even after a machine restart.
230V
60Hz Figure 22
<1A
<1.5A
<1A
Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Multi Zone Outdoor Units (01.2023)
VOLTAGE
No limit
VOLT_LTM_FREQ1_ADD
VOLT_LTM_FREQ2_ADD
I f low voltage protection triggers and voltage is not restored to normal
within 3 minutes, the protection remains active even after a machine
restart.