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„ Function of each terminal blocks
Terminal DO1 / DO1: Operating Output (DC12 V)
• The output is displayed when the system starts operation (output when the thermostat is on / off).
Terminal DO2 / DO2: Alarm Active Digital Output (DC12 V)
• During Alarm operation, Alarm Active Digital Output is active.
Terminal DO3 / DO3: Fan Motor Active Digital Output (DC12 V)
• A fan control signal is output. It is usually the ON output at the time of operating, but it is the OFF output in defrosting.
Terminal DO4 / DO4: Defrost Mode Digital Output (DC12 V)
• During Defrost operation, Defrost Mode Output is active.
Terminal DO5 / DO5: Digital Output 1 (DC12 V)
DO6 / DO6: Digital Output 2 (DC12 V)
• Output function selected using rotary switches SW503 (DO5 / DO5) & SW504 (DO6 / DO6).
SW503, 504 Position
1
2
3
4
5
6
7 - 15
16
Set with the SW503 or SW504 switch on the control P.C. board MCC-1777.
Outdoor unit(s) operation level is lower than capacity command
Outdoor unit(s) operation level is higher than capacity command
Cooling oil recovery / Heating refrigerant recovery control
Cooling operation output
Heating operation output
The suction air temperature (TA) is in the thermostat OFF range (only TF type)
Do not use
Under restriction of compressor speed due to heat sink overheating in outdoor unit (s)
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Output Function
SW503
SW504
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