Midea MCCDH30A-TA3SL, Техническое и сервисное руководство

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Air-cooled modular chiller unit
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9) Water flow detection malfunction
Water flow detection malfunction
Yes
Yes
Water pump didn‟t open or error.
Didn‟t open the valve in system.
No
The water flow detection switch
error.
Inform the customer service
center.
PCB mistakes to alarm.
The water flow switch installed out
of criterion, result in mistaking
work.
Selected the capacity of water
pump is less (flow & head).
Designed the water pipe inner
dimension is too less.
Open the pump or change;
inspect the power supply or
control circuit of pump.
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Open the valve.
Replace the water flow
switch, inspect the
connecting wire.
Adjust the installation
position.
Replace water pump.
Replace water pipe.
Remove superfluous valve
or forced it is always on.
The filter or water pipe is dirty, the
shell and tube heat exchanger
scaled.
Clean filter, water pipe,
shell and tube heat
exchanger.
Air is in water.
Empty.
Yes
Replace PCB.
No
No
No
No
No
No
No
No
No
Installed the 2-way valve quantity
is more than 50% of indoor unit
quantity.