Zanussi ZS12V70CCHI, Service Manual

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8.7.3
Protection according to indoor unit evaporator temperature
This protection is a function that can occur in cooling and heating modes.
Cooling mode indoor unit
icing temperature limits
Evap Temperature Description
Indoor unit pipe sensor
temperature limit 3
1 °C
If the indoor unit pipe sensor temperature is below this value in
cooling mode, compressor and outdoor unit fan motor stops.
Indoor unit pipe sensor
temperature limit 2
4 °C
If the indoor unit pipe sensor temperature is below this value in
cooling mode, frequency is decreased.
Indoor unit pipe sensor
temperature limit 1
6 °C
If the indoor unit pipe sensor temperature is below this value in
cooling mode, frequency is not increased.
Heating mode indoor unit
excessive heating limits
Evap Temperature Description
Indoor unit pipe sensor
temperature limit 3
67 °C
If the indoor unit pipe sensor temperature is above this value in
heating mode, frequency is decreased.
Indoor unit pipe sensor
temperature limit 2
60 °C
If the indoor unit pipe sensor temperature is above this value in
heating mode, frequency is not increased.
Indoor unit pipe sensor
temperature limit 1
56 °C
If the indoor unit pipe sensor temperature is above this value in
heating mode, it goes into limiting.
In this protection, protection system is run according to the current value.
Model Current (A)
9/12K 10
18/24 13
If the compressor’s current reaches the above values, it starts to decrease the frequency. If the current value does not go below the
specified value, compressor frequency is decreased to the min. level; compressor is never shut down.
8.7.4
Low/High Voltage Protection
Outdoor unit AC voltage
protection Voltage limits Description
Low AC voltage 145
If the network voltage is at or below 145 V, compressor and
outdoor unit fan motor stops. It works again when the voltage
increases
High AC voltage 270
If the network voltage is at or above 270 V, compressor and
outdoor unit fan motor stops. It runs again when the voltage
decreases.
NOTE:
There are no intermediate values for voltage protection in Vestel electronic boards. Low and high limits were determined and
when these limits are exceeded, HL icon in the indoor unit and the LED in the outdoor unit blinks 18 times and the outdoor unit stops.
When the values go back to normal, protection codes go away and outdoor unit starts to work again.
8.7.5
Protection According To The Outdoor Unit Condenser Temperature
1.
During this protection, frequency is not increased when the outdoor unit exchanger temperature reaches the critical level of 65°C.
2.
Frequency is decreased when the outdoor unit exchanger temperature reaches the critical level of 70°C.
3.
When the outdoor unit exchanger temperature goes below the critical level of 60°C, protection is reset and frequency is released.
Cooling System Error
1.
Gas leakage protection works as long as the air conditioner is active in cooling and heating modes.
2.
Temperature for cooling (If the difference between IU Environment sensor - Pipe sensor temperature is less than 3C)
3.
Temperature for heating (If the difference between IU Pipe sensor - Environment sensor temperature is less than 3C)
4.
Control time for cooling and heating is 60 minutes. When the temperature difference goes above 3C, control is reset.
The coding and protection values of this error are the same on all boards. It is displayed with the error code ER-07.