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Toshiba
8-4.
Outdoor unit
control
3)Current release control
The number of compressor rotation is controlled so that current value of the compressor drive circuit does not exceed the
specified value.
• The outdoor unit detects the input current.
• The outside air temperature is detected and used to set the specified value of current.
• The number of compressor rotation instructed by the hydro unit is used to determine whether the current value
exceeds the specified value.
• If exceeds, the number of compressor rotation is reduced to the most approximate number instructed by the hydro
unit within the specified value range.
Heating
Cooling
No cooling operation available for TO < 10°C.
4)Current releases shift control
During a cooling operation, this control prevents the electronic parts, such as a compressor drive element, and
compressor from failing.
• The current release control value (I) is selected from the following table according to the TO sensor value.
Current release control value (I)
Item Operation flow and applicable data, etc.
Outdoor unit current inverter
Main circuit control current
Compressor operation Hz down
Outside air temperature (TO)
Current release point setting
Capacity control continue
Operation current Settings
Current degradation
Yes
No
Outside temperature
TO (degree °C)
Current release value (A)
802H-E 1102, 1402H-E
35 TO 12.0 12.0
15 TO < 35 20.0 - (To - 15) × 0.4 20.0 - (To - 15) × 0.4
TO < 15 20.0 20.0
Outside temperature
TO (degree °C)
Current release value (A)
802H-E 1102, 1402H-E
44 TO 9.5 15.0
39 TO < 44 13.0 17.7
10 TO < 39 16.0 20.0
12.0
20.0
CT(A)
15 35 TO
Temperature range 802H-E 1102H-E 1402H-E
50°C TO 10.5 14.1 14.1
45°C TO < 50°C 10.5 14.1 14.1
39°C TO < 45°C 14.0 14.1 16.4
TO < 39°C 16.0 14.1 16.4
TO abnormal 10.5 14.1 14.1
+00A09-002_01EN_SVM_ALL_Air_to_Water.book Page 58 Monday, October 5, 2009 2:09 PM