vcc compressor/inverter - gavishusa compressor vcc = v ariable c apacity c ompressor variable...

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VCC Compressor/Inverter

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Home Home Term With frequency signal

Without frequency, time

Without frequency, load

Diagnostic LED Animation VCC

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Meaning of terms

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Diagnostic LED Animation VCC Without frequency, time


VCC compressor

VCC = Variable Capacity Compressor Variable refrigerating capacity via different speeds.

Compressor runs with a pulse-width modulation square-wave voltage.

Electronic inverter supplies square wave voltage.

Variable voltage in accordance with the required speed. Attention: Never connect the compressor directly to the mains supply!

No motor overload switch. Safety device and current limiting via inverter electronics.

Term

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VCC compressor Position of inverter electronics

Grey housing on the compressor support plate.

Black housing directly by the compressor.

Black housing directly by the compressor with transparent lid (diagnostic LED).

Term

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VCC compressor Types of speed control

With frequency signal 2-pin connection cable from the electronics to the inverter.

Without frequency signal Inverter calculates speed independently.

Time-dependent

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Term

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With frequency signal

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Speed control With frequency signal

Mains supply line

Compressor

Inverter electronics

Connecting cable to power PCB (mains voltage)

Frequency signal (2-pin cable from control PCB)


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Electronics Inverter PCB Frequency signal

Example:

65 Hz = Compressor ON at 1900 rpm

55 Hz = Compressor OFF.

Compressor

4 speed stages: e.g. 1600, 1900, 3000, 3600 rpm.

3000 rpm on appliance start-up.

3600 rpm with SuperFrost.

3000 rpm if no frequency signal (e. g. due to plug contact problems).

The compressor will restart with a 10-minute delay (20 minutes for more recent models).


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Speed increase by one stage during compressor run if the compressor runs for more than 60 minutes (more recent models: from the 70th minute).

Speed decrease by one stage on restart if the compressor has run for less than 60 minutes (more recent models: less than 40 minutes).


speed increase

compressor running time <1h

speed reduction

speed increase compressor running time >1h

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Testing the inverter electronics and the frequency signal

Connect appliance to a wattmeter and switch on. The compressor runs at 3000 rpm. Activate SuperFrost. The compressor will continuously switch to the highest speed.

The speed increase can be checked with the wattmeter. It is not possible to specify exact values because the power input varies greatly depending on running time and temperature.

Service mode in the service menu.

Evaluate diagnostic LED, flash code.

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Without frequency signal -time-dependent-

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Speed control Without frequency signal (drop-in), time-dependent

Mains supply: Voltage is applied as soon as the mains plug is plugged in.

Connecting line to power PCB (mains voltage)

Compressor ON signal from the power PCB (mains voltage). Voltage must be present here for as long as it is intended to run the compressor.

Compressor



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Power PCB Inverter PCB

Mains voltage

Compressor ON / OFF

Compressor

Square wave voltage

3000 rpm on appliance start-up (mains plug plugged in).

4 speed stages: 1600, 1900, 3000, 3600 rpm


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The inverter PCB calculates the compressor speed independently.

Speed increase: Compressor running time exceeds 70 minutes

Speed reduction: Compressor running time is less than 40 minutes:

No change in speed: Compressor running time is 40 to 70 minutes:


speed increase

compressor running time <40Min.

speed reduction

speed increase compressor running time >70Min.

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Speed control Without frequency signal (drop-in), load-dependent

Check electronic inverter Connect appliance to a wattmeter and switch on. The compressor runs at 3000 rpm. SuperFrost activates continuous compressor running

After 70 minutes, speed is increased.

The speed increase can be checked with the wattmeter. It is not possible to specify exact values because the power input varies greatly depending on running time and temperature.

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Without frequency signal -load-dependent-

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Mains supply line

Connection wiring to the thermostat/ electronics (mains voltage)

Thermostat/electronics switch-on value (Compressor ON) As soon as mains voltage is applied, the compressor will run.

Speed is calculated by the inverter electronics depending on the refrigeration load.

Compressor



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Speed is calculated based on the refrigeration load which the refrigeration system places on the compressor.

Example: Warm goods are placed in the refrigerator while the compressor is running: => Internal temperature rises.

=> Refrigeration load increases.

=> Speed is increased while the compressor is running.

=> The compressor switches off as soon as the thermostat/electronics have reached the switch-off temperature.


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While the compressor is running, the inverter electronics compare the current load with the previous load approximately once per minute.

If there is a major change to the load, a new speed is set.

No fixed speed stages. Any speed between 1600 and 4500 rpm is possible.

On start-up of the appliance (mains plug in): Speed 2250 rpm. After 8 minutes, switch to top speed, until the thermostat and/or electronics reach their switch-off value and the compressor switches off.

Compressor speed

lower the same greater

Refrigeration load

reduction the same increase

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Inverter with diagnostic LED

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Diagnostic options Inverter error. Compressor error. Frequency cable/signal or switch signal error. A green LED displays the error functions by means of various flashing codes.

green LED

Diagnostic LED

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Meaning of flashing codes:

1 flash (every 15 seconds) No error

2 flashes (every 5 seconds) - Inverter with frequency signal: No frequency signal from the PCB - Drop-in inverter: No switch signal from the PCB

3 flashes (every 5 seconds) Inverter error

4 flashes (every 5 seconds) Compressor error

Please note Other technical refrigeration errors, e. g. too high a pressure or blocked capillaries, must be taken into account! Error codes must be worked through in sequence.

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Diagnostic LED

vcc compressor/inverter - gavishusa compressor vcc = v ariable c apacity c ompressor variable...

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