IPS Controllers M920 Owner's Manual page 38

M920 & M920W pH/Dual ORP Controller Owner's Manual
F. Feeder not operating
1. No Flow: Flow light LED must be on.
2. Inadequate Flow: Check flow through the flow cell and controller.
3. Blown output fuse in the controller: Replace fuse.
G. Flow LED off
1. Verify that all appropriate valves are open.
2. Verify that there is sufficient pressure in the line. Close right side
valve slightly if necessary.
3. Verify that the flow switch is securely connected to the
controller terminals.
4. Both the pH and ORP dose outputs are disabled if the green Flow
LED is not illuminated.
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