Inline Pressure Boosting System
15
Inline 400 Troubleshooting Guide
Condition Indicator Lights Possible Cause Corrective Action
Unit will not turn
on- No GREEN
or RED LED
illuminated on
control cap
None Circuit breaker tripped or turned off Turn on the circuit breaker
None Circuit breaker tripped or turned off
Consult a licensed electrician to
properly wire outlet
Unit runs briey,
won't develop
pressure, then
turns off
Flashing Green (10s) then ashing RED Insufcient water Check water supply and valving
Flashing Green (10s) then ashing RED Unit insufciently primed
Refer to owner’s manual’s section on
proper priming technique
Flashing Green (10s) then ashing RED Dry running Check water supply and valving
Unit won't start
with water
demand
Solid Green Inlet water pressure above 40PSI
Install a Pressure Reducing valve on
inlet to reduce inlet pressure
Unit continuously
cycles ON/OFF
(Rapid Cycle)
Flashing Green Improper charge pressure in tank
Set the pressure in pressure tank to
2PSI lower than cut-in pressure
Flashing Green Check valve between tank and unit Place check valve after pressure tank
Unit won't turn on
Solid RED Unit is turned OFF
Press the power button on the user
interface
Flashing RED
Overvoltage (input voltage higher than
+5%)
Check the supply voltage and correct
if possible
Flashing RED
Undervoltage (input voltage lower than
-5%)
Check the supply voltage and correct
if possible
Flashing RED
Overheating due to excessive water
temperature
Supply cold water to the pump
Flashing RED Pump is in alarm condition Reset pump by pressing power button
Unit runs
or cycles
continuously
Flashing Green
Leak/usage above 1/2gpm in system
plumbing
Repair the leaking plumbing
Flashing Green
Internal non-return valve is blocked/
damaged
Place a new non-return valve before unit
in INLET plumbing
Flashing Green Internal ow piston is stuck open Clean the ow piston (see page 14)
NOTE: The motor in this unit contains thermal protection that responds to motor current and heat from the motor winding and ambient
temperature. When the combination of current and heat exceeds a predetermined point, the protector opens and interrupts the circuit.
When the winding termperature returns to a more normal level, the protector will automatically reset.