3-11
MAIN PARTS
(5) Fin Temperature Increase (Only for 24 and 30HP)
(a) Level of Detection
When the temperature of internal thermistor exceeds more than 100
o
C, an abnormality is detected.
(b) Function
When abnormalities are detected, the inverter compressor is stopped and the signal code of
stoppage cause is transmitted to PCB1.
(c) Cancellation of Protection Function
Transmission for signal code of stoppage cause is canceled when a stopping order is issued or
main power source is cut off.
(6) Earth Detection
(a) Level of Detection
When the starting current of the compressor reaches 80% of the overcurrent protection value, an
abnormality is detected.
(b) Function
When abnormalities are detected, the inverter compressor is stopped and the signal code of
stoppage cause is transmitted to PCB1.
(c) Cancellation of Protection Function
Transmission for signal code of stoppage cause is canceled when a stopping order is issued or
main power source is cut off.
3.1.6 Overload Control
(a) Level of Detection
When the output current exceeds 105% of the maximum output current, an abnormality is
detected.
(b) Function
An overload signal is issued when output current exceeds 105% of the maximum output current,
and the frequency decreases.
For 10 seconds after the output current decreases lower than 88% of the rated current, the
operation is performed with the compressor frequency limited to the upper level frequency when
the output current decreases lower than 88% of the rated one.
However, if the frequency order is smaller than the maximum value, the operation is performed
according to the order.
(c) Cancellation of Protection Function
After the operation described in the above item b. is performed for 10 seconds, this control is
canceled.
