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• Current safe setting value
Power
source
A
1-phase
23
3-phase
13.5
③ Ending condition
This control ends when the inverter's T-phase current or secondary current drops below the current safe setting
value minus 1 ampere for 3 minutes continuously or below the current safe setting value in the table shown
above for 6 minutes continuously.
(ii) Compressor upper limit frequency control
When it enters any zone other than the zone A (Fig. 1), the upper limit of compressor speed is changed.
Power
source
A
1-phase
105
3-phase
106
However, the priority is given to the upper limit compressor speed by this control or the compressor speed under
normal condition, whichever the lower.
(f) Power transistor temperature (PT) protective control
If the power transistor temperature exceeds 85°C, the compressor speed is controlled.
Release
(6) Test run
(a) Starting conditions
(i) Turn ON the test run switch (SW5-1). The switch is invalid if it is turned ON before the power ON.
(ii) Pump down switch (SW5-3) must be turned OFF.
(b) Contents of control
(i) Turning ON the dip switch (SW5-2) conducts cooling operation and turning OFF (SW5-2) conducts heating
operation.
1) Cooling operation
Compressor operation frequency control is operated under the cooling low pressure control.
2) Heating operation
Compressor operation frequency control is operated under the heating high pressure control.
(ii) Test run start signal under corresponding operation mode is transmitted to all indoor units connected.
(c) Ending conditions
(i) When the test run switch (SW5-1) is turned OFF, it stops.
(ii) When it has stopped anomalously by the error control during test run, the error is displayed in the same way as
normal operation and the state of anomalous stop continues even if the test run switch (SW5-1) is turned OFF.
Inverter primary (T-phase) current
Cooling
B
C
D
21
19
15
13.5
11.5
11.5
Compressor upper limit speed (rps)
Cooling
B
C
D
98
82
54
98
92
54
Retention
81
Power transistor temperature (ºC)
-
Current safe value [A]
Inverter secondary current
Heating
A
23
13.5
Heating
130
Speed is reduced once each minute
85
185
-
'20 • KX-T-373
Cooling
Heating
B
C
D
18
13
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