4.
5.
1.
2.
3.
ii
Protection Control .................................................................................69
4.1
4.2
4.3
4.4
4.5
Other Control.........................................................................................74
5.1
5.2
Emergency Operation ............................................................................75
5.3
Demand Operation .................................................................................77
5.4
6.1
Drain Pump Control................................................................................78
6.2
6.3
6.6
Freeze Prevention ..................................................................................84
6.7 Heater Control ........................................................................................85
Test Operation ......................................................................................88
1.1
1.2
Field Setting ..........................................................................................94
3.1
PC Board Defect.........................................................152
Si39-502A
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