Relay Board - Mitsubishi Electric City Multi PQHY-P72 Service Handbook

[ III Heat Source Unit / BC Controller Components ]

3. RELAY BOARD

(1) PQHY/PQRY
CNAC4
Power input
4 L1 phase
1 L2 phase
CN81
Solenoid valve output for
unit control(208/230V)
- 72 -
CN83
1 - 3 Operation-ON signal output
5 - 7 Pump interlock input
CNOUT2 CNPW
1 - 2 Pump interlock signal
Relay drive input
output to main board
from main board