To Next PageTo Next PageWhat to do if my Milton Roy Water Pump ECC chatters or vibrates?
If your Milton Roy Water Pump's ECC chatters or vibrates, and the limits are okay, the circuit board or feedback potentiometer might need replacing. Otherwise, the ECC could be driving the pump adjustment against its mechanical stop. In this case, reset the ECC and the pump's high and low limits according to the calibration procedure.
Why is my Milton Roy Water Pump ECC not responding to the 4-20 mA command signal?
If the ECC on your Milton Roy Water Pump isn't responding to the 4-20 mA command signal, first ensure the ECC is receiving AC power. If not, apply power. Next, check the polarity of the 4-20 mA signal wires connected to the terminals and correct if improperly connected. If the motor is frozen, with the power off, use the handwheel to check its rotation and replace the motor if needed. You may also need to replace the potentiometer or the PC board.
What to do if limit lights flicker as ECC moves in Milton Roy Water Pump?
If the limit lights flicker as the ECC moves on your Milton Roy Water Pump, it could be due to a bad feedback potentiometer. Use an oscilloscope to observe the pot signal while it's in motion; if necessary, replace the feedback potentiometer assembly. Another cause could be a bad connection at the plugs, so check the continuity and repair or replace plugs and/or wiring as needed. Finally, a bad printed circuit board could also be the culprit, requiring replacement of the PC board.
Why my Milton Roy Water Pump ECC will only travel in one direction?
If the ECC on your Milton Roy Water Pump only travels in one direction, the printed circuit board is likely faulty and needs to be replaced.
How to troubleshoot ECC moving to the same position on Milton Roy Water Pump?
If the ECC on your Milton Roy Water Pump consistently moves to the same position regardless of the signal applied, first check the command signal being applied to the ECC. Connect a mA meter into the signal line to read the signal and correct the signal source if necessary, checking for broken wires or loose connections. Also, review the initial start-up procedure to ensure the mode setup is correct. Finally, the feedback potentiometer gear may be slipping or worn. Manually move the knob, apply a control signal, and observe the gear; if necessary, replace the feedback potentiometer assembly.
General| Brand | Milton Roy |
|---|---|
| Model | MAXROY B |
| Category | Water Pump |
| Language | English |
Covers protective clothing, hearing, electrical safety, liquid compatibility, and general safety.
Covers general safety advice for installation, calibration, and maintenance.
Covers general info, unpacking, storage, and field installation guidelines.
Details on installation safety precautions and mounting the ECC.
Guidance on connecting signals, power, and wiring requirements.
Steps for replacing or retrofitting ECC circuit boards.
Covers spare parts, returning units, and basic maintenance needs.
Detailed steps for removing and installing ECC circuit boards.
Instructions for replacing feedback potentiometers and nylon worm gears.
