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5.
FREQUENCY RESTRICTION
When there’s no alarm activated, IPM red led blinks 1s ON and 5s OFF (if compressor running) or it is always OFF (if
compressor is not running). This led is not collocated on the display but it’s situated on the IPM module, near the
sensors. Otherwise, when the compressor is not working properly can view the following reports:
SIGNAL DESCRIPTION
RED LED
T° discharge too high
5
T° external heat-exchanger too high
3
T° internal heat-exchanger too high
3
T° internal heat-exchanger too low
6
5.1
Protection against compressor discharge temperature too high:
The problem is indicated by the sequence of 5 blinks of red light of IPM. Specifically, given as a limit value of
temperature 95 ° C is that:
•
T°discharge ≤ 87°C
there’s no frequency limitation;
•
88°C < T°discharge < 92°C
the rate of frequency grow is limited;
•
93°C ≤ T°discharge ≤ 95°C
the frequency stops growing;
•
T°discharge > 96°C
the frequency starts going down;
In case of the compressor is running and T° dischar ge overtakes the
limit, the compressor frequency is reduced to the minimum
(compressor frequency reduction). The compressor frequency
reduction starts 2 minutes after that the limit was overtaken.
In case of air-conditioner is turned on with T°discharge on the limit, compressor starts to work. The frequency is
limited to the first compressor frequency target calculated by IPM MCU. Otherwise, it T°discharge is over the limit,
frequency grows to the first compressor frequency target calculated by IPM MCU and, then, it reduces to minimum.
5.1
Protection against external heat-exchanger temperature too high:
When the protection is activated the IPM red led blinks 3 times; the limit reference in this case is 65°C and the
frequency restriction are:
•
T°ext. eat-exchanger ≤ 57°C
there’s no frequency limitation;
•
58°C < T°ext. heat-exchanger < 62°C
the rate of frequency grow is limited;
•
63°C ≤ T°ext. heat-exchanger ≤ 65°C
the frequency stops growing;
•
T°ext. heat-exchanger > 66°C
the frequency starts going down;
5.2
Protection against internal heat-exchanger temperature too high:
Also for the reporting of the internal exchanger temperature too high the IPM red led blinks 3 times. Limit value is
55°C for which apply the following considerations:
•
T°int. heat-exchanger ≤ 47°C
there’s no frequency limitation;
•
48°C < T°int. heat-exchanger < 52°C
the rate of frequency grow is limited;
•
53°C ≤ T°int. heat-exchanger ≤ 55°C
the frequency stops growing;
•
T°int. heat-exchanger > 56°C
the frequency starts going down;
Содержание INVERTER 12 HP
Страница 10: ...10 SCHEMATIC...
Страница 11: ...9 1 Control board side...
Страница 12: ...9 2 IPM board side...
Страница 13: ...11 OHMICH VALUES COMPRESSOR DISCHARGE SENSOR...
Страница 14: ...12 OHMICH LVALUES HEAT EXCHANGER AND AIR SENSOR...
Страница 15: ...13 ACCESSORIES Currently there aren t accessories except those supplied with the machine...