BWT CRU 200, Installation And Operating Manual

Page: 7 / 19

EN
7
7.1 Trouble shooting
This chapter deals with problems that may occur on the plant. Follow the instructions in the relevant
flow diagrams in order to perform a troubleshooting.
Warning! ALWAYS pull the POWER PLUG
before replacement of electrical components and wait 3 minutes.
Description
of fault
Reason for fault Action
Fault 1:
The tank
is empty

Low water level.

Check that the RO-plant is running and there is flow of
concentrate to the BWT CRU. The RO-plant may produce less
concentrate than there is need of for consumption.

Check if too many consumers are connected on the BWT
CRU and switch some off. Let the BWT CRU become
completely filled up.

Check if the level switch float is stuck in top of the reservoir.
Carefully push the level switch float up/down so that it is at
concentrate water level.

Check if the level switch and/or the level switch cable are
defective. If so, replace.

Check the TP-pump (See Fault 1 , Fault 2 and Fault 3 ).
Fault 2:
TP pump
doesn’t run

Switch is at OFF.

Push switch to ON.

Low water level.

Let the reservoir become completely filled up and the TP pump
will start automatically.

Defective pressure
switch.

Short the pressure switch by making a jumper between the
two plugs. If the pump only runs when this jumper is
connected and there is a request for water, then the pressure
switch is defective and must be replaced.

Defective capacitor.

Locate transport pumps capacitor in the control box and
replace it.

Defective fuse.

Check the PCB and replace the fuse
(F3-Circuit Board) of the TP pump.

Defective TP-pump.

Replace TP-pump.

Defective PCB.

Replace PCB.

Float of the level
switch is stuck.

Push the level switch float carefully up/down until it is at
concentrate level.

Defective level
switch.

Replace level switch.

External stop signal
on the TP-pump.

Check and rectify cause of the external stop signal.