–
–
'14 • KX-SM-202
(5) Protective control
(a) High pressure protective control/error
If the high pressure exceeds . MPa, the compressor speed is reduced gradually.
It reduces to 0 rps at the lowest.
If the high pressure still rises to . MPa, the compressor stops.
(b) Low pressure protective control/error
If the low pressure drops below 0. MPa, the compressor speed is reduced gradually.
It reduces to 0 rps at the lowest.
If the low pressure still drops below 0. MPa, the compressor stops.
(c) Discharge pipe temperature control/error
If discharge pipe temperatures (detected with Tho-D, -D) exceed 0ºC, the compressor speed is reduced gradually. (To 0
rps at the lowest) If the temperatures still continue to rise beyond 0ºC, the compressor stops.
(d) Compressor compression ratio protective control
If the compressor compression ratio exceeds the setting value, the compressor speed is reduced gradually.
It reduces to 0 rps at the lowest.
(e) Current safe control
(i) The current safe control monitors current values at T-phase of inverter. If the value exceeds the setting value, the com-
pressor speed is reduced.
If the value is higher than the setting value even if the speed is reduced, the speed is reduced further.
(ii) This control is reset if the current value at T-phase of inverter becomes lower than the setting value – A for minutes
continuously or lower than the setting value for minutes continuously.
(f) Current cut control
(i) Current sensor built in the power transistor monitors current values output from the inverter. If the value exceeds A,
the current cut control stops the compressor. The compressor starts automatically minutes after the stop.
(ii) If the above control activates times within minutes, C or C is turned off, and the operation is stopped with
the error stop.
State of the error continues for minutes after the error stop. The error can be reset by operating the inspection reset
from the remote control.
(g) Power transistor temperature (PT) protective control
If temperatures on the power transistor exceed the setting value, the compressor speed is reduced gradually.
It reduces to 0 rps at the lowest.
(h) Under-dome temperature protective control
If the under-dome temperature exceeds the setting value, the compressor speed is reduced gradually.
It reduces to 0 rps at the lowest.
(i) Protection for combination of outdoor units (Master unit)
The capacity of connectable outdoor units is checked when the communication check is performed after turning the power ON.
If the checked result is other than the allowable combinations mentioned in the following table
①
it is prohibited to start
operation due to outdoor unit combination error.
When this error occurs, the error code mentioned in the following table
②
is displayed on the -segment display.
Table
②
Contents displayed on 7-segment display at the combination error
Table
①
combination list
Code display area
Data display area
Contents of invalid operation
3
OPE
Invalid combination of outdoor units
Capacity
615
670
735
800
850
900
950
1000
1060
1120
Combination patterns
Combination
（
280+335
)
Combination
（
335+335
)
Combination
（
335+400
)
Combination
（
400+400
)
Combination
（
400+450
)
Combination
（
450+450
)
Combination
（
475+475
)
Combination
（
500+500
)
Combination
（
500+560
)
Combination
（
560+560
)
Capacity
1200
1250
1300
1350
1425
1450
1500
1560
1620
1680
Combination patterns
Combination
（
400+400+400
)
Combination
（
400+400+450
)
Combination
（
400+450+450
)
Combination
（
450+450+450
)
Combination
（
475+475+475
)
Combination
（
475+475+500
)
Combination
（
500+500+500
)
Combination
（
500+500+560
)
Combination
（
500+560+560
)
Combination
（
560+560+560
)