Toshiba MMY-MUP0961HT6P-UL Service Manual page 86

Note 1: Specifications of display relay contact
• The terminal for display output ([Operation] terminal) must satisfy the following electrical rating.
<Electrical Rating>
220 to 240 VAC, 10 mA or more, 1 A or less
24 VAC, 10 mA or more, 1 A or less (non-conductive load)
When connecting a conductive load (e.g. relay coil) to the display relay load, insert a surge killer CR (for an AC
power supply) or a diode for preventing back electromotive force (for a DC power supply) on the bypass circuit.
The optional P.C. board should be connected to the header outdoor unit (U1).
Note 2: COM contact specifications
• COM terminals have DC12 V output with a basic insulation. Use a switch, such as a relay or photocoupler,
insulated from a controller (locally procured) for CO (Change-Over) contact or NO (normally-open) contact.
• DC12 V has a current-limiting resistor of 3.3 k .
• For non-voltage contacts, use a relay with minimum applicable load of DC12V,3mA or less.
[Power peak-cut control through electric power]
For the Power peak-cut control, the Power peak-cut control through electric power can be set by Outdoor unit
DN code (O.DN) [009].
The Power peak-cut control through electric power regulates outdoor unit output so that power consumption
does not exceed the upper limit value set.
(1) To change into the power peak-cut control through power, set the outdoor unit DN code to [009] = 1.
* To return to the power peak-cut control through capacity, set the outdoor unit DN code to [009] = 0.
(2) Check that the criteria value of a maximum power in cooling or heating is set to [00A] to [00D].
For the connected outdoor units system, set the criteria value of a maximum power consumption (the total
of each outdoor unit power) to the header outdoor unit.
Outdoor unit DN Code (O.DN) [00C], [00D]
Criteria value setting for a maximum cooling power
(e.g.) When the maximum standard value of cooling power consumption is set as 19.35 kW = 19.35kW
Outdoor unit DN Code (O.DN)
Value
Outdoor unit DN Code (O.DN) [00A], [00B]
Criteria value setting for a maximum heating power
(e.g.) When the maximum standard value of heating power consumption is set as 14.00 kW = 14.00kW
Outdoor unit DN Code (O.DN)
Value
(3) If ON signal is input from the optional P.C. board, the power peak-cut control through electric power
operates.
Input method of ON signal for power peak-cut control is the same as that for normal peak-cut control.
Refer to "Standard", "For one input function", or "Enhanced Function".
The power peak-cut control regulates the outdoor unit capacity so that it does not exceed the upper limit value
(X%,Y%,Z% of the criteria value for a maximum power set in (2)) set by [00E] [00F] [010] of (O.DN).
e.g.) If the criteria value of maximum heating power during 80% demand control is set to 14.00kW, the
upper limit control becomes 11.2kW (14.00kW×80%=11.20kW), the outdoor unit output is controlled so that
the power consumption does not exceed 11.20kW.
NOTE 1: To protect a refrigerant cycle, the power peak-cut may not be operated during the defrost operation,
oil recovery operation, or refrigerant recovery operation.
NOTE 2: For demand OFF, the outdoor unit may operate beyond the setting criteria value of a maximum power
consumption because the power limit control does not function.
NOTE 3: Power consumption is estimated, causing approx. ±5 % difference from the actual power
consumption.
To perform accurate power peak-cut control, use a demand controller and electric power meter.
NOTE 4: The power consumption of the indoor units is not included.
NOTE 5: When power consumption does not decrease or expected effects are not obtained, change the upper
limit value of X%, Y%, Z% or the criteria value for a maximum power.
NOTE 6: In the case of Upper limit 100% (normal operation), the operation is without peak-cut control.
Peak-cut control is not performed with the value set to O.DN [00A] - [00D].
[00C] [00D]
19 35
[00A] [00B]
14 00
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