Manual

Troubleshooting

LED codes

Pump LED sequence code Explanation

No light Pump is off — no power

Steady light on LED Pump is running or on stand-by

One short and one long ﬂash Low input voltage to pump

Two short and one long ﬂash Communication is lost between pump and valve

Three short and one long ﬂash Pump is overheated

Four short and one long ﬂash Pump is overloaded

Five short and one long ﬂash Blocked rotor inside pump

Six short and one long ﬂash Low battery voltage at the valve

Short fast ﬂashes Pump is in pairing mode

Repeater / push-button LED sequence code Explanation

Steady light System is running

Seldom ﬂashes System is running

Short fast ﬂashes Push-button / signal repeater is in pairing mode

Operation troubleshooting

Symptom Cause Remedy

Pump does not turn on Timer slide switch is set to “OFF”

position or timer clock is not

programmed to allow operation.

Set the slide switch to the “ON”

position or program the timer

clock.

Water at the valve is already at

the set temperature and does not

require pump operation.

Pump will turn on when the

water at the valve cools. Verify

the temperature setting on the

pump.

Outlet has no power Check that there is power at the

outlet. Make sure the outlet that

the pump is plugged into is not

controlled by a wall switch.

GFCI is tripped. Verify the “TEST” and “RESET” of

the GFCI outlet that the pump is

plugged into.

Troubleshooting

Laing Thermotech ACT-4 wireless Potable Hot Water Recirculation Kit Instruction

Manual