Warning Codes; Protection Functions - Zanussi ZS12V70CCHI Service Manual

8.6 Warning Codes

Warning Code
Compressor speed limited due
to outdoor pipe (condenser)
temperature
Compressor speed limited
due to compressor pressing
temperature
Compressor speed limited due
to board cooler temperature
Compressor speed limited
due to indoor unit exchanger
temperature
Compressor speed limited due
to current
PFC high voltage switch-off
protection
Sudden voltage drop/
compressor protection
AC high voltage information

8.7 Protection Functions

Not all errors occurring in inverter air conditioners are defined as malfunction. Some error may be temporary due to external factors
or different reasons. These temporary errors are named protection. Air conditioner resumes working after the causes of the
protection go away. The warning code display with the help of the LED on the outdoor unit board are as follows.
8.7.1 Protection According To The Outdoor Temperature
Cooling mode outdoor tem-
perature limits
Outdoor temperature limit
Heating mode outdoor tem-
perature limits
Outdoor temperature limit
8.7.2 Compressor Discharge Temperature Protection
Compressors used in air conditioners work between certain heat values determined by the companies. The predetermined
temperature limits in inverter air conditioners are as follows.
Compressor Discharge
Temperature protections
Comp. Discharge temperature
limit 3
Comp. Discharge temperature
limit 2
Comp. Discharge temperature
limit 1
Comp. Discharge temperature
limit reset
(7 Segment) Outdoor unit led
Blinking 2 times -
No display
stopping for 3 sec.
Blinking 3 times -
No display
stopping for 3 sec.
Blinking 4 times -
No display
stopping for 3 sec.
Blinking 5 times -
No display
stopping for 3 sec.
Blinking 10 times -
No display
stopping for 3 sec.
Blinking 28 times -
No display
stopping for 3 sec.
Blinking 29 times -
No display
stopping for 3 sec.
Blinking 20 times -
No display
stopping for 3 sec.
Outdoor Temperatures Description
43-47-50-54 °C
Outdoor Temperatures Description
15-19-23 °C
Protection
Description
Limits
If the discharge temperature is above this value, compressor and outdoor unit fan
113 °C
motor stops.
If the discharge temperature is above this value, frequency is decreased.
106 °C
If the discharge temperature is above this value, frequency is not increased.
103 °C
If the discharge temperature is below this value, protection deactivates.
96 °C
Warning Description
Limits or decreases the compressor frequency when
the temperature on the condenser goes out of limits
due to outside factors and customer usage.
Occurs when the compressor temperature reaches
above the critical level. Limits or decreases the
compressor frequency when limits are exceeded.
Exchanger cleanliness and gas level should be
checked.
May occur when the outdoors are too hot or in out-
of-limit situations. Limits or decreases compressor
frequency.
Compressor frequencies are limited or its speed
decreased for high temperature in heating and ice
melting in cooling in the indoor unit.
Generally, the current increases due to the burden
generated by the high outdoor temperature.
Therefore, the compressor's operating speed is
limited.
Protection occurs in order for the board to not get
damaged when the device remains at high voltage
Speed is decreased to prevent damage to the
compressor in sudden voltage drops.
Indicates that supply voltage is high.
If the outdoor temperature is in this range, compressor tends to
first fix the frequency and then decrease it.
If the outdoor temperature is in this range, compressor tends to
first fix the frequency and then decrease it.
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