Randy
Hey, I'm Randy - let's figure this out together. You selected Pump
Problems. Can you tell me a bit more about what's happening?
For example: Is the pump not starting at all, is it running but not producing flow, or
is it tripping out on an alarm?
User
Pump 2 won't start. The HOA switch is in Auto and it shows a fault on the MCC panel.
Good info. A fault on the MCC panel is our starting point. Let's work through
this:
Step 1: What fault code or indicator are you seeing on the MCC? Common
ones are:
- Overload / thermal fault (OL)
- Ground fault
- Short circuit
- Phase loss indicator
If it has a VFD, what's the fault code on the drive display?
'
The overload relay light is on. We had a power fluctuation about an hour ago.
That makes sense - a voltage fluctuation can cause an overload relay to trip even if
nothing is mechanically wrong with the pump. Here's your path:
[X] Step 2 - Reset the overload relay:
Locate the overload relay block (usually a blue or black module on the starter). Press
the reset button. Wait 10 seconds.
Step 3 - Check voltage before restart:
Before you start the pump, verify you have balanced three-phase voltage. A single phase
dropout can cause the motor to draw too much current and trip immediately again.
" Step 4 - Test start in Manual mode:
Briefly bump the pump in Manual (HOA) to confirm it starts. If it trips again quickly,
we may have a mechanical issue or undersized OL heater.