FAQ - Laundry - Troubleshooting
Q: Water is coming out the vacuum breaker.
A: The float has got a mineral build up on it and is not raising all the way to the seal. Remove the cap of the vacuum breaker and clean the float with a deliming solution. For new installations, make sure the vacuum breaker is not installed backwards.
Q: I have main power connected, but the power light is not on.
A: Check for blown fuses and proper voltage input.
Q: The system has been programmed but the pumps will not run when they get a signal.
A: Check formula volume settings and flow rates. For testing purposes, try programming a much smaller volume to verify if the pump will run (the volume called for may be exceeding the maximum pump run time).
Q: LLA-400 The alarm sounds continuously and won't turn off.
A: May simply need to re-calibrate the pressure sensor. Otherwise, check all of the air line connections, and make sure the pressure sensor wires have not come loose from the circuit board..
Q: SA-12 The light will not turn off, it stays on all the time.
A: First make sure the device that the SA-12 is connected to is not experiencing any problems. Then check all wiring connections between the SA-12 and the device to make sure they are correct.
Q: Why does a "low level" message come up on the display of the remote control keypad (or flashing "L" on OP/OP-Plus) when I’m not even using a Low Level Alarm system?
A: Make sure there is not a jumper wire inadvertently connected across the low level terminals on the pump board. Also can be caused by a communication problem between the remote control and pump board. Check all wire connections carefully.
Q: Why does a letter come up in the pump display of my On-Premise (Plus versions too) and the pump does not run?
A: This indicates that the dispenser is trying to inject a "second level". Levels can get out of sequence if a load count signal is missed from a previous load, or incorrect load count pump setting. Can also happen if the pump receives multiple signals during a formula.
Q: What causes a flush error?
A: Knight laundry dispensers have connections on the circuit board for optional use of a flow switch. Flush errors are caused by an open circuit in the flow switch connection. When a flow switch is used, it closes the circuit when water flows through it. Make sure that the flow switch wires have not come loose. Also check the flush error sampling if using a Knight-Trak II system. When a flow switch is not used, a "jumper" is used to close the circuit and prevent flush error messages from occurring.
Q: What can be done about unwanted multiple signals from the washer?
A: Depending on the laundry dispenser used, try signal lockout, system lockout, or signal qualify time features. Otherwise, may be able to use multiple volume levels to prevent injection.
Q: Why did my dispenser lose memory?
A: Excessive levels of electrical noise and/or power surges can cause problems with dispenser memory. In these situations, using a good quality surge protector/noise filter should prevent any loss of memory.
Q: The pump will not stay primed.
A: Check the condition of the squeeze tube and roller block. Make sure there are no air leaks where the flow tubing connects to the pump.
Q: Why do I keep blowing fuses in my dispenser?
A: Check for a direct short. On-board fuses generally will blow if a motor (or output circuit) is bad. In-line fuses to the transformer can blow from the same conditions, but most likely if the transformer is shorted.
Q: There is water going back in to the chemical container on my ILCS or laundry dispenser.
A: When a flush manifold is used, the checkvalves on the individual chemical ports prevent water from pushing back through the pump. Inspect the checkvalves and replace as needed.