–90–
7. HYDRO UNIT INSTALLATION MANUAL
Engineering Data Book
7
Defrost and Compressor operation Outputs
Defrost output
• Display relay is ON when the system defrost.
• Volt free contact
AC230 V; 0.5 A (maximum)
DC24 V; 1 A (maximum)
• Connection details: Terminals 1 and 2 (OPERATION) on MCC-1217 TB (Refer to “Fig. 7-33”)
Compressor operation output
• Display relay is ON with outdoor unit compressor operation.
• Volt free contact
AC230 V; 0.5 A (maximum)
DC24 V; 1 A (maximum)
• Connection details: Terminals 3 and 4 (EMG) on MCC-1217 TB (Refer to “Fig. 7-33”)
PJ20
CN209
TCB-PCIN3E
4
3
L2
2
1
L1
Fig. 7-33
Local Supply
Power Supply
Power Supply
Display
Relay
K1
Display
Relay
K2
Connection
Cable
OPERATION
EMG
:Defrost
output
:Compressor
operation
output
Hydro unit main
control board
28-EN
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