8.0 - TROUBLE-SHOOTING COMMON TO BT-MA & BTB-MA SERIES
8.1 - MECHANICAL FAULTS
As the system is quite robust there are no apparent mechanical problems. Occasionally there might be a loss of
liquid from the nipple because the tube nut has loosened, or more simply the discharge tubing-has broken.
Very rarely there may be losses caused by the breakage of the membrane, or by the membrane seals in which
case they have to be replaced by disassembling the four screws of the pump head fig. 11), when re-mounting
the pump head ensure that the screws are replaced properly, along with “O” ring.
After repair, the metering pump will need to be cleaned of additive residues which can damage the pump cas-
ing.
❶
- THE METERING PUMP GIVES PULSES BUT THE ADDITIVE IS NOT INJECTED
a.
Dismount the suction and discharge valves, clean them and replace, see position (fig. 11). Should the valves
be swollen, check valves material against our chemical resistance compatibility chart and fit correct valves.
Standard valves are Viton. Upon request Silicon, EPDM (Dutral), Nitryl and valves, ball check valve, K valve
can be supplied.
b. Check clogging of the filter.
ATTENTION: When removing the metering pump from the plant, be careful as there might be some residual
additive in the discharge hose.
8.2 - ELECTRICAL FAULTS
❶
DISPLAY OFF, NO LED LIGHT ON
a. Check power supply line (AC plug, power cord, fuse and connections). If not working please contact the near-
est distributor
❷
DISPLAY ON, RED LED (POWER/STAND BY) ON, PUMP NOT OPERATIONAL
a. Check whole programming data previously inserted or push the Start/Stop button.
❸
PUMP PULSES ARE NOT CONSTANT
a. Check that supply voltage is /- 10% of rated voltage
❹
❺
FLOATING SWITCH (TANK LEVEL SENSOR) NOT WORKING
a. Check that the connection between level probe and pump is securely fastened.
b.
If problem persists make a short connection between pin #3 and pin #4 on the second connector at the pump
body. In case the pump turns on the alarm, replace level probe. If problem persists, contact distributor.
PUMP ALARM NOT WORKING WHEN CONNECTED WITH FLOW-SENSING DEVICE
a. Check that the connection between the flow-sending device and pump is securely fastened.
b. Ensure the pump is primed - the pump head should be filled with liquid.
c. Start the pump again. If the alarm persist use a spring loaded on/off switch (the one with normally open con-
tact) connect to #2 pump connector (pin #1 and #2) than follow instruction in section d.
d. Select the manual mode on the menu screen. Set 30 pulses/minute; subsequently in the alarm menu set 4
reference pulses of and 1 the max difference therefore press start/stop: the pump will start working in man-
ual way (turned on green led and flashing red led of the pulses). For every pump pulses press the on/off
switch button to simulate the flow sensor: if the pump doesn't put itself in alarm, replace the flow sensor. In
the case in which the pump goes in alarm simulating the flow sensor with the button to turn please contact
distributor.
•
29
•
ENGLISH
❻
THE PUMP STOPS AFTER SOME INJECTION.
Verify the setting of the menù (reference pulses and max difference must be set to zero if flow sensor is not
installed).
