Troubleshooting: Control Panels, Alarms and Floats

Our troubleshooting support will help you identify, troubleshoot, and fix common technical issues for a wide range of products.

The links below contain information on most SJE Rhombus products. If you do not find the information you’re searching for, please contact us and one of our specialists will provide you the information promptly. Call 1-888-342-5753 or email us.


Alarm Circuit Troubleshooting


Alarm Circuit Schematic

Schematic of alarm circuit.


Alternating Circuit Board Test

Three & Four Float System



Circuit Board (IFS Panels)


Circuit Board (Non-IFS Panels)

Option Key

6A = Auxiliary Alarm Contacts – 19B = Lead/Lag Selector Switch – 19T(U): 19T = Test/Off/Automatic Switch – 19U = Hand/Off/Automatic Switch – 19X = Door Mounted Pump Run Indicators


Contactor Control

Schematic of contractor control.


Duplex Three & Four Float Test


Duplex Alternating Board

Models 122, 123, 124, 322, and 324 control panels


Duplex Control Panel Troubleshooting

122, 322, 123, or 124 control panels


Full Load Current


Full Load Current


Pump Switch Control Schematic

Pump switch schematic shown below.


Ratings Label

Sample of a Model 112 control panel ratings label.


Schematic Symbols

Commonly used schematic symbols for the water/wastewater industry.


Short Cycling

Simplex and Duplex control panels


Simplex Control Panel Troubleshooting

112, 312, 113, and 114 control panels


Starter Boxes Troubleshooting

All Models


Timed Dosing Control Panel Troubleshooting

Models TD, DTD, and PS control panels