IWAKI EWN -B16 TC, Instruction Manual

Page: 78 / 116

78
Troubleshooting
States Possible causes Solutions
Liquid leaks. Loose fit of the fitting or the air vent
body
• Retighten them.
Loose fit of the pump head • Retighten the pump head. See
page 37.
O rings or valve gaskets are not
installed. • Install O rings and valve gaskets.
Diaphragm is broken. • Replace the diaphragm.
Excessive discharge pressure • Check that a discharge line is not
closed.
• Check if tubing is not clogged.
Key opera-
tion is inef-
fective. Keypads are locked. • Release the keypad lock.
The pump
does not run. The pump is in a wait state. • Enter the pump into an operation
mode.
The pump has not received the
external signal in the EXT mode. • Check wiring.
EXT mode programming has not
finished. • Complete EXT mode program-
ming.
The pump
does not
receive the
external
signal. The signal has not been sent to the
pump. • Check wiring.
The pump
does not
store EXT
mode pro-
gramming. EXT mode programming has not
been stored to the pump. • Push the start/stop key after pro-
gramming.