ProMinent Chlorinsitu-III, Assembly And Operating Instructions Manual

Page: 50 / 120

9.1.2 Production tank
This alarm occurs if the booster pump's thermal protection function
is activated. The following causes are possible:
n
The booster pump is operating under excessive load.
n
One phase of the booster pump's power supply has failed.
n
One of the electrical connections is faulty.
This alarm occurs if the switch for the minimum liquid level of the
production tank is activated. The following causes are possible:
n
The pump valve to the product tank is faulty.
n
The level switch is faulty.
This alarm occurs if the switch for the maximum liquid level of the
production tank is activated. The following causes are possible:
n
The pump valve is not mechanically opened.
n
The manual valve is closed.
n
The lines to the product tank are blocked.
n
Cooling water is penetrating into the production tank and/or
into the caustic tank.
This alarm occurs if the temperature in the production tank
exceeds the alarm limit value. This alarm limit is 5 °C above the
setpoint for switching on the cooling system. The following causes
are possible:
n
The cooling water valve is not mechanically opened.
n
The manual valve is closed.
n
The cooling water supply is too low.
n
No cooling water is being supplied.
n
The cooling water does not flow through the heat exchanger in
the production tank.
9.1.3 Power Supply Unit
This alarm occurs if the actual current is less than 70% of the set‐
point. The following causes are possible:
n
There is too little brine in the membrane cell.
n
The lye concentration is too low
n
One of the power supplies is faulty (if there are two or more
power supplies).
n
The analog control for the power supplies is not working per‐
fectly.
n
The analog return signal of the actual current is not perfect.
n
Power supply alarm ⇒ This alarm does not appear on the dis‐
play of the PLC Programmable Logic Controller.
If one of the power supplies has a fault, it is displayed by a red
LED. The following causes are possible:
– The cooling fans for the power supplies are not working.
– The temperature in the control cabinet is too high.
– The filters in the cooling fans are blocked.
The booster pump's thermal protec‐
tion function is activated
The liquid level in the production tank
is too low
The level in the production tank is too
high
The temperature in the production
tank is too high / cooling water flow
too low
Current too low
[ALARM] / Troubleshooting menu
50