Current Limit Control - Toshiba RAS-13UKHP-E4 Service Manual

7-7. Current Limit Control *Heat pump model
only
The microcontroller detects the input current so as to
prevent it exceeds a specified value by means of
controlling the outdoor fan control as described in (1)
and (2).
(1) Current limit control (Cooling operation)
Control is performed as shown below by detecting
the compressor operating current with a current
sensor (C.T).
Input current
13UKH Series / 10UKH Series
/ 07UKH Series
13.5A / 19.2A
12.5A / 17.8A
(2) Current limit control (Heating operation)
Control is performed as shown in Fig. 7-7-2
Input current
13UKH Series / 10UKH Series
/ 07UKH Series
13.5A / 19.2A
12.5A / 17.8A
10A / 15.6A
9A / 15.0A I1
Remark :
1. This function is available only for heat pump model (Cooling models have no a current sensor (C.T.)).
2. For 07UKH Series and 10UKH Series, the value of currents shown on the diagram above are two times
the actual operating value. This is because the lead wire operated two times through the C.T.
I4
I3
I4
I3
I2
Compressor
More than I4 continues for 3 seconds
More than I3 continues for 5 seconds
Fig. 7-7-1
Compressor
More than I4 continues for 3 seconds
More than I3 continues for 5 seconds
ON
Fig. 7-7-2
37 -
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FILE NO. SVM-05001
Outdoor fan
OFF
OFF
ON
Outdoor fan
OFF
OFF
OFF
ON